android mobile app development grimoire

super Posts : 511 Join date : 2011-08-02

imageView1.setY(imageView1.getY() + 200);

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super Posts : 511 Join date : 2011-08-02

android mobile app development grimoire - Page 2 2ckk26

The database created is saved in a directory: data/data/APP_Name/databases/DATABASE_NAME.

data table : (String name, String pass) this are to example fields
you can see them in the inner class : myDbHelper in myDbAdapter class
replace and add fields on them to customize your SQDB

main xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">

   <TextView
   android:text="username"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_alignParentTop="true"
   android:layout_marginTop="12dp"
   android:id="@+id/textView"
   android:textSize="18sp"
   android:textStyle="bold|italic"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:gravity="center" />

   <EditText
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:id="@+id/editName"
   android:textStyle="bold|italic"
   android:layout_below="@+id/textView"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true"
   android:hint="Enter Name"
   android:gravity="center_vertical|center" />

   <TextView
   android:text="password"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_marginTop="13dp"
   android:id="@+id/textView2"
   android:textStyle="bold|italic"
   android:textSize="18sp"
   android:layout_below="@+id/editName"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true"
   android:gravity="center"
   android:hint="Enter Password" />

   <Button
   android:text="view_data"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/button2"
   android:textSize="18sp"
   android:onClick="viewdata"
   android:textStyle="bold|italic"
   android:layout_alignBaseline="@+id/button"
   android:layout_alignBottom="@+id/button"
   android:layout_alignRight="@+id/button4"
   android:layout_alignEnd="@+id/button4" />

   <Button
   android:text="add_user"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/button"
   android:textStyle="bold|italic"
   android:textSize="18sp"
   android:onClick="addUser"
   android:layout_marginLeft="28dp"
   android:layout_marginStart="28dp"
   android:layout_below="@+id/editPass"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:layout_marginTop="23dp" />

   <Button
   android:text="update"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/button3"
   android:onClick="update"
   android:textStyle="normal|bold"
   android:layout_below="@+id/editText3"
   android:layout_alignLeft="@+id/button4"
   android:layout_alignStart="@+id/button4"
   android:layout_marginTop="13dp" />

   <EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:id="@+id/editText6"
   android:layout_alignTop="@+id/button4"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:freezesText="false"
   android:hint="Enter Name to Delete Data"
   android:layout_toLeftOf="@+id/button2"
   android:layout_toStartOf="@+id/button2" />

   <Button
   android:text="delete"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginRight="21dp"
   android:layout_marginEnd="21dp"
   android:id="@+id/button4"
   android:onClick="delete"
   android:textStyle="normal|bold"
   tools:ignore="RelativeOverlap"
   android:layout_marginBottom="41dp"
   android:layout_alignParentBottom="true"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true" />

   <EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:layout_marginTop="47dp"
   android:id="@+id/editText3"
   android:textStyle="bold|italic"
   android:textSize="14sp"
   android:layout_below="@+id/button"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:layout_marginLeft="7dp"
   android:layout_marginStart="7dp"
   android:hint="Current Name" />

   <EditText
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:inputType="textPassword"
   android:ems="10"
   android:layout_marginTop="11dp"
   android:id="@+id/editPass"
   android:hint="Enter Password"
   android:gravity="center_vertical|center"
   android:textSize="18sp"
   android:layout_below="@+id/textView2"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:textAllCaps="false"
   android:textStyle="normal|bold" />

   <EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:id="@+id/editText5"
   android:textStyle="bold|italic"
   android:textSize="14sp"
   android:hint="New Name"
   android:layout_alignTop="@+id/button3"
   android:layout_alignLeft="@+id/editText3"
   android:layout_alignStart="@+id/editText3"
   android:layout_marginTop="32dp" />
</RelativeLayout>

main activity java :

Code:: package com.justforum.yotamarker.sqliteoperations;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
   EditText Name, Pass , updateold, updatenew, delete;
   myDbAdapter helper;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   Name= (EditText) findViewById(R.id.editName);
   Pass= (EditText) findViewById(R.id.editPass);
   updateold= (EditText) findViewById(R.id.editText3);
   updatenew= (EditText) findViewById(R.id.editText5);
   delete = (EditText) findViewById(R.id.editText6);

   helper = new myDbAdapter(this);
   }
   public void addUser(View view)
   {
   String t1 = Name.getText().toString();
   String t2 = Pass.getText().toString();
   if(t1.isEmpty() || t2.isEmpty())
   {
   Message.message(getApplicationContext(),"Enter Both Name and Password");
   }
   else
   {
   long id = helper.insertData(t1,t2);
   if(id<=0)
   {
   Message.message(getApplicationContext(),"Insertion Unsuccessful");
   Name.setText("");
   Pass.setText("");
   } else
   {
   Message.message(getApplicationContext(),"Insertion Successful");
   Name.setText("");
   Pass.setText("");
   }
   }
   }

   public void viewdata(View view)
   {
   String data = helper.getData();
   Message.message(this,data);
   }

   public void update( View view)
   {
   String u1 = updateold.getText().toString();
   String u2 = updatenew.getText().toString();
   if(u1.isEmpty() || u2.isEmpty())
   {
   Message.message(getApplicationContext(),"Enter Data");
   }
   else
   {
   int a= helper.updateName( u1, u2);
   if(a<=0)
   {
   Message.message(getApplicationContext(),"Unsuccessful");
   updateold.setText("");
   updatenew.setText("");
   } else {
   Message.message(getApplicationContext(),"Updated");
   updateold.setText("");
   updatenew.setText("");
   }
   }

   }
   public void delete( View view)
   {
   String uname = delete.getText().toString();
   if(uname.isEmpty())
   {
   Message.message(getApplicationContext(),"Enter Data");
   }
   else{
   int a= helper.delete(uname);
   if(a<=0)
   {
   Message.message(getApplicationContext(),"Unsuccessful");
   delete.setText("");
   }
   else
   {
   Message.message(this, "DELETED");
   delete.setText("");
   }
   }
   }
}

myDbAdapter.java :

Code:: package com.justforum.yotamarker.sqliteoperations;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class myDbAdapter {
   myDbHelper myhelper;
   public myDbAdapter(Context context)
   {
   myhelper = new myDbHelper(context);
   }

   public long insertData(String name, String pass)
   {
   SQLiteDatabase dbb = myhelper.getWritableDatabase();
   ContentValues contentValues = new ContentValues();
   contentValues.put(myDbHelper.NAME, name);
   contentValues.put(myDbHelper.MyPASSWORD, pass);
   long id = dbb.insert(myDbHelper.TABLE_NAME, null , contentValues);
   return id;
   }

   public String getData()
   {
   SQLiteDatabase db = myhelper.getWritableDatabase();
   String[] columns = {myDbHelper.UID,myDbHelper.NAME,myDbHelper.MyPASSWORD};
   Cursor cursor =db.query(myDbHelper.TABLE_NAME,columns,null,null,null,null,null);
   StringBuffer buffer= new StringBuffer();
   while (cursor.moveToNext())
   {
   int cid =cursor.getInt(cursor.getColumnIndex(myDbHelper.UID));
   String name =cursor.getString(cursor.getColumnIndex(myDbHelper.NAME));
   String password =cursor.getString(cursor.getColumnIndex(myDbHelper.MyPASSWORD));
   buffer.append(cid+ " " + name + " " + password +" \n");
   }
   return buffer.toString();
   }

   public int delete(String uname)
   {
   SQLiteDatabase db = myhelper.getWritableDatabase();
   String[] whereArgs ={uname};

   int count =db.delete(myDbHelper.TABLE_NAME ,myDbHelper.NAME+" = ?",whereArgs);
   return count;
   }

   public int updateName(String oldName , String newName)
   {
   SQLiteDatabase db = myhelper.getWritableDatabase();
   ContentValues contentValues = new ContentValues();
   contentValues.put(myDbHelper.NAME,newName);
   String[] whereArgs= {oldName};
   int count =db.update(myDbHelper.TABLE_NAME,contentValues, myDbHelper.NAME+" = ?",whereArgs );
   return count;
   }

   static class myDbHelper extends SQLiteOpenHelper
   {
   private static final String DATABASE_NAME = "myDatabase"; // Database Name
   private static final String TABLE_NAME = "myTable"; // Table Name
   private static final int DATABASE_Version = 1; // Database Version
   private static final String UID="_id"; // Column I (Primary Key)
   private static final String NAME = "Name"; //Column II
   private static final String MyPASSWORD= "Password"; // Column III
   private static final String CREATE_TABLE = "CREATE TABLE "+TABLE_NAME+
   " ("+UID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+NAME+" VARCHAR(255) ,"+ MyPASSWORD+" VARCHAR(225));";
   private static final String DROP_TABLE ="DROP TABLE IF EXISTS "+TABLE_NAME;
   private Context context;

   public myDbHelper(Context context) {
   super(context, DATABASE_NAME, null, DATABASE_Version);
   this.context=context;
   }

   public void onCreate(SQLiteDatabase db) {

   try {
   db.execSQL(CREATE_TABLE);
   } catch (Exception e) {
   Message.message(context,""+e);
   }
   }

   @Override
   public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
   try {
   Message.message(context,"OnUpgrade");
   db.execSQL(DROP_TABLE);
   onCreate(db);
   }catch (Exception e) {
   Message.message(context,""+e);
   }
   }
   }
}

Message.java class (simplifies toast message) :

Code:: package com.justforum.yotamarker.sqliteoperations;

import android.content.Context;
import android.widget.Toast;

public class Message {
   public static void message(Context context, String message) {
   Toast.makeText(context, message, Toast.LENGTH_LONG).show();
   }
}

lv4

_________________
MB over and out emp it up

super Posts : 511 Join date : 2011-08-02

android mobile app development grimoire - Page 2 2cqt6g

onUpgrade SQlite DB and get raw data query (an upgrade to the prev walkthrough (lv4) of the SQLite DB (see above walkthrough)):

activity_main.xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">

   <TextView
   android:text="username"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_alignParentTop="true"
   android:layout_marginTop="12dp"
   android:id="@+id/textView"
   android:textSize="18sp"
   android:textStyle="bold|italic"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:gravity="center" />

   <EditText
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:id="@+id/editName"
   android:textStyle="bold|italic"
   android:layout_below="@+id/textView"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true"
   android:hint="Enter Name"
   android:gravity="center_vertical|center" />

   <TextView
   android:text="password"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_marginTop="13dp"
   android:id="@+id/textView2"
   android:textStyle="bold|italic"
   android:textSize="18sp"
   android:layout_below="@+id/editName"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true"
   android:gravity="center"
   android:hint="Enter Password" />

   <Button
   android:text="view_data"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/button2"
   android:textSize="18sp"
   android:onClick="viewdata"
   android:textStyle="bold|italic"
   android:layout_alignBaseline="@+id/button"
   android:layout_alignBottom="@+id/button"
   android:layout_alignRight="@+id/button4"
   android:layout_alignEnd="@+id/button4" />

   <Button
   android:text="add_user"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/button"
   android:textStyle="bold|italic"
   android:textSize="18sp"
   android:onClick="addUser"
   android:layout_marginLeft="28dp"
   android:layout_marginStart="28dp"
   android:layout_below="@+id/editPass"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:layout_marginTop="23dp" />

   <Button
   android:text="update"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/button3"
   android:onClick="update"
   android:textStyle="normal|bold"
   android:layout_below="@+id/editText3"
   android:layout_alignLeft="@+id/button4"
   android:layout_alignStart="@+id/button4"
   android:layout_marginTop="13dp" />

   <EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:id="@+id/editText6"
   android:layout_alignTop="@+id/button4"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:freezesText="false"
   android:hint="Enter Name to Delete Data"
   android:layout_toLeftOf="@+id/button2"
   android:layout_toStartOf="@+id/button2" />

   <Button
   android:text="delete"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginRight="21dp"
   android:layout_marginEnd="21dp"
   android:id="@+id/button4"
   android:onClick="delete"
   android:textStyle="normal|bold"
   tools:ignore="RelativeOverlap"
   android:layout_marginBottom="41dp"
   android:layout_alignParentBottom="true"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true" />

   <EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:layout_marginTop="47dp"
   android:id="@+id/editText3"
   android:textStyle="bold|italic"
   android:textSize="14sp"
   android:layout_below="@+id/button"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:layout_marginLeft="7dp"
   android:layout_marginStart="7dp"
   android:hint="Current Name" />

   <EditText
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:inputType="textPassword"
   android:ems="10"
   android:layout_marginTop="11dp"
   android:id="@+id/editPass"
   android:hint="Enter Password"
   android:gravity="center_vertical|center"
   android:textSize="18sp"
   android:layout_below="@+id/textView2"
   android:layout_alignParentLeft="true"
   android:layout_alignParentStart="true"
   android:textAllCaps="false"
   android:textStyle="normal|bold" />

   <EditText
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:inputType="textPersonName"
   android:ems="10"
   android:id="@+id/editText5"
   android:textStyle="bold|italic"
   android:textSize="14sp"
   android:hint="New Name"
   android:layout_alignTop="@+id/button3"
   android:layout_alignLeft="@+id/editText3"
   android:layout_alignStart="@+id/editText3"
   android:layout_marginTop="32dp" />
</RelativeLayout>

MainActivity.java :

Code:: package com.justforum.yotamarker.sqliteoperations;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
   EditText Name, Pass , updateold, updatenew, delete;
   myDbAdapter helper;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   Name= (EditText) findViewById(R.id.editName);
   Pass= (EditText) findViewById(R.id.editPass);
   updateold= (EditText) findViewById(R.id.editText3);
   updatenew= (EditText) findViewById(R.id.editText5);
   delete = (EditText) findViewById(R.id.editText6);

   helper = new myDbAdapter(this);
   }
   public void addUser(View view)
   {
   String t1 = Name.getText().toString();
   String t2 = Pass.getText().toString();
   if(t1.isEmpty() || t2.isEmpty())
   {
   Message.message(getApplicationContext(),"Enter Both Name and Password");
   }
   else
   {
   long id = helper.insertData(t1,t2,"hadouken@upgrade.test");
   if(id<=0)
   {
   Message.message(getApplicationContext(),"Insertion Unsuccessful");
   Name.setText("");
   Pass.setText("");
   } else
   {
   Message.message(getApplicationContext(),"Insertion Successful");
   Name.setText("");
   Pass.setText("");
   }
   }
   }

   public void viewdata(View view)
   {
   Message.message(this,helper.getRow(updateold.getText().toString()));
   /*alternative code to view
   * all data
   * stored in the SQliteDb
   * */
// String data = helper.getData();
// Message.message(this,data);
   }

   public void update( View view)
   {
   String u1 = updateold.getText().toString();
   String u2 = updatenew.getText().toString();
   if(u1.isEmpty() || u2.isEmpty())
   {
   Message.message(getApplicationContext(),"Enter Data");
   }
   else
   {
   int a= helper.updateName( u1, u2);
   if(a<=0)
   {
   Message.message(getApplicationContext(),"Unsuccessful");
   updateold.setText("");
   updatenew.setText("");
   } else {
   Message.message(getApplicationContext(),"Updated");
   updateold.setText("");
   updatenew.setText("");
   }
   }

   }
   public void delete( View view)
   {
   String uname = delete.getText().toString();
   if(uname.isEmpty())
   {
   Message.message(getApplicationContext(),"Enter Data");
   }
   else{
   int a= helper.delete(uname);
   if(a<=0)
   {
   Message.message(getApplicationContext(),"Unsuccessful");
   delete.setText("");
   }
   else
   {
   Message.message(this, "DELETED");
   delete.setText("");
   }
   }
   }
}

Message.java

Code:: package com.justforum.yotamarker.sqliteoperations;

import android.content.Context;
import android.widget.Toast;

public class Message {
   public static void message(Context context, String message) {
   Toast.makeText(context, message, Toast.LENGTH_LONG).show();
   }
}

myDbAdapter.java :

Code:: package com.justforum.yotamarker.sqliteoperations;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class myDbAdapter {
   myDbHelper myhelper;
   public myDbAdapter(Context context)
   {
   myhelper = new myDbHelper(context);
   }

   public long insertData(String name, String pass, String email)
   {
   SQLiteDatabase dbb = myhelper.getWritableDatabase();
   ContentValues contentValues = new ContentValues();
   contentValues.put(myDbHelper.NAME, name);
   contentValues.put(myDbHelper.MyPASSWORD, pass);
   contentValues.put(myDbHelper.eMail, email);
   long id = dbb.insert(myDbHelper.TABLE_NAME, null , contentValues);
   return id;
   }

   public String getData()
   {
   SQLiteDatabase db = myhelper.getWritableDatabase();
   String[] columns = {myDbHelper.UID,myDbHelper.NAME,myDbHelper.MyPASSWORD,myDbHelper.eMail};
   Cursor cursor =db.query(myDbHelper.TABLE_NAME,columns,null,null,null,null,null);
   StringBuffer buffer= new StringBuffer();
   while (cursor.moveToNext())
   {
   int cid =cursor.getInt(cursor.getColumnIndex(myDbHelper.UID));
   String name =cursor.getString(cursor.getColumnIndex(myDbHelper.NAME));
   String password =cursor.getString(cursor.getColumnIndex(myDbHelper.MyPASSWORD));
   String e_mail = cursor.getString(cursor.getColumnIndex(myDbHelper.eMail));
   buffer.append(cid+ " " + name + " " + password +" \n" + e_mail +" \n");
   }

   return buffer.toString();
   }

   public String getRow(String namae)
   {
   String result = "";
   SQLiteDatabase db = myhelper.getWritableDatabase();
   String selection = String.format("SELECT eMail FROM myTable WHERE Name='%s'", namae);
   //String selection = "SELECT eMail FROM myTable WHERE Name='%s'";
   Cursor cursor = db.rawQuery(selection, null);
   //result = cursor.getString(cursor.getColumnIndex(myDbHelper.eMail));
   if (cursor.moveToFirst()){
   do{
   result = cursor.getString(cursor.getColumnIndex("eMail"));
   // do what ever you want here
   }while(cursor.moveToNext());
   }
   cursor.close();
   return result;
   //Cursor cursor =db.rawQuery("SELECT eMail FROM TABLE_NAME WHERE NAME = ?",new String[] {namae});
// StringBuffer buffer= new StringBuffer();
// int cid =cursor.getInt(cursor.getColumnIndex(myDbHelper.UID));
// String name =cursor.getString(cursor.getColumnIndex(myDbHelper.NAME));
// String password =cursor.getString(cursor.getColumnIndex(myDbHelper.MyPASSWORD));
// String e_mail = cursor.getString(cursor.getColumnIndex(myDbHelper.eMail));
// buffer.append(cid+ " " + name + " " + password +" \n" + e_mail +" \n");
// return buffer.toString();
   }

   public int delete(String uname)
   {
   SQLiteDatabase db = myhelper.getWritableDatabase();
   String[] whereArgs ={uname};

   int count =db.delete(myDbHelper.TABLE_NAME ,myDbHelper.NAME+" = ?",whereArgs);
   return count;
   }

   public int updateName(String oldName , String newName)
   {
   SQLiteDatabase db = myhelper.getWritableDatabase();
   ContentValues contentValues = new ContentValues();
   contentValues.put(myDbHelper.NAME,newName);
   String[] whereArgs= {oldName};
   int count =db.update(myDbHelper.TABLE_NAME,contentValues, myDbHelper.NAME+" = ?",whereArgs );
   return count;
   }

   static class myDbHelper extends SQLiteOpenHelper
   {
   private static final String DATABASE_NAME = "myDatabase"; // Database Name
   private static final String TABLE_NAME = "myTable"; // Table Name
   private static final int DATABASE_Version = 2; // Database Version
   private static final String UID="_id"; // Column I (Primary Key)
   private static final String NAME = "Name"; //Column II
   private static final String MyPASSWORD= "Password"; // Column III
   private static final String eMail= "eMail"; // Column 4
   private static final String CREATE_TABLE = "CREATE TABLE "+TABLE_NAME+
   " ("+UID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+NAME+" VARCHAR(255) ,"+ MyPASSWORD+" VARCHAR(225));";
   private static final String DROP_TABLE ="DROP TABLE IF EXISTS "+TABLE_NAME;
   private static final String DATABASE_ALTER_DB = "ALTER TABLE "
   + TABLE_NAME + " ADD COLUMN " + eMail + " string;";

   private Context context;

   public myDbHelper(Context context) {
   super(context, DATABASE_NAME, null, DATABASE_Version);
   this.context=context;
   }

   public void onCreate(SQLiteDatabase db) {

   try {
   db.execSQL(CREATE_TABLE);
   } catch (Exception e) {
   Message.message(context,""+e);
   }
   }

   @Override
   public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
   try {
   Message.message(context,"OnUpgrade");
   if (oldVersion < 2) {
   db.execSQL(DATABASE_ALTER_DB);
   }

   }catch (Exception e) {
   Message.message(context,""+e);
   }
   }
   }
}

key notes :
1 private static final int DATABASE_Version = 2; // was 1 in previous ver
private static final String eMail= "eMail"; // Column 4 was added
2 add :
if (oldVersion < 2) {
db.execSQL(DATABASE_ALTER_DB);
}
if (oldVersion < 3) {
db.execSQL(DATABASE_ALTER_DB2);
}
add so on to run all upgrades successfully one by one.

private static final String DATABASE_ALTER_DB = "ALTER TABLE "
+ TABLE_NAME + " ADD COLUMN " + eMail + " string;";

adds email column without losing prev DB data

getData() will return all data in the db use it to see the changes between the data in prev SQDb version
to the new one, in ver 1 the email fields (didn't exist)

public long insertData(String name, String pass, String email)
was therefore, also modified :
contentValues.put(myDbHelper.eMail, email); was added

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android mobile app development grimoire - Page 2 2d1jx2

android enable and send SMS :

manifest :
add : <uses-permission android:name="android.permission.SEND_SMS" />
so it looks like :

Code:: <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.justforum.yotamarker.smstest1">
   <uses-permission android:name="android.permission.SEND_SMS" />

   <application
   android:allowBackup="true"
   android:icon="@mipmap/ic_launcher"
   android:label="@string/app_name"
   android:roundIcon="@mipmap/ic_launcher_round"
   android:supportsRtl="true"
   android:theme="@style/AppTheme">
   <activity android:name=".MainActivity">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />

   <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
   </activity>
   </application>

</manifest>

main xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/linearLayout1"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:orientation="vertical" >

   <TextView
   android:id="@+id/textViewPhoneNo"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Enter Phone Number : "
   android:textAppearance="?android:attr/textAppearanceLarge" />

   <EditText
   android:id="@+id/editTextPhoneNo"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:phoneNumber="true" >
   </EditText>

   <TextView
   android:id="@+id/textViewSMS"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Enter SMS Message : "
   android:textAppearance="?android:attr/textAppearanceLarge" />

   <EditText
   android:id="@+id/editTextSMS"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:inputType="textMultiLine"
   android:lines="5"
   android:gravity="top" />

   <Button
   android:id="@+id/buttonSend"
   android:onClick="test"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="Send" />

</LinearLayout>

main java notice in the oncreate the app checks if SMS permission was enabled if not
a dialog pops up asking the user to permit SMS sending for this app, next times the permission isn't needed
(it stays permitted):

Code:: package com.justforum.yotamarker.smstest1;

import android.Manifest;
import android.content.DialogInterface;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

Button buttonSend;
EditText textPhoneNo;
EditText textSMS;
final int SEND_SMS_PERMISSION_REQUEST_CODE =1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

buttonSend = (Button) findViewById(R.id.buttonSend);
textPhoneNo = (EditText) findViewById(R.id.editTextPhoneNo);
textSMS = (EditText) findViewById(R.id.editTextSMS);
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.SEND_SMS)) {

new AlertDialog.Builder(this)
.setTitle("Permission needed")
.setMessage("This permission is needed because the app needs to be able to send SMSes")
.setPositiveButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.SEND_SMS}, SEND_SMS_PERMISSION_REQUEST_CODE);
}
})
.setNegativeButton("cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.create().show();

} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.SEND_SMS}, SEND_SMS_PERMISSION_REQUEST_CODE);

}}

public void test(View view) {
String phoneNo = textPhoneNo.getText().toString();
String sms = textSMS.getText().toString();

try {
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNo, null, sms, null, null);
Toast.makeText(getApplicationContext(), "SMS Sent!",
Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(getApplicationContext(),
"SMS faild, please try again later!",
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}}

SMS okute miru ka

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android mobile app development grimoire - Page 2 2d5rk8

android stusio summon a phone call

main xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
<LinearLayout
   android:layout_width="match_parent"
   android:layout_height="match_parent">
   <Button
   android:id="@+id/buttonCall"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="call"
   />

</LinearLayout>
</android.support.constraint.ConstraintLayout>

main activity java
notice this code line ("tel:replace this with phone number") to something like ("tel:5556666666"):

Code:: package com.justforum.yotamarker.phone_call;

import android.Manifest;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
   /*
   * make sure you add :
   * <uses-permission android:name="android.permission.CALL_PHONE" />
   * to AndroidManifest.xml
   * ___
   /___\
   (|0 0|)
   __/{\U/}\_ ___/vvv
  / \ {~} / _|_P|
  | /\ ~ /_/ ||
  |_| (____) ||
  \_]/______\ /\_||_/\
   _\_||_/_ |] _||_ [|
call (_,_||_,_) \/ [] \/
   * */
   private Button button;
   private static final int REQUEST_PHONE_CALL = 1;

   @Override
   public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   // ensure enablement of phone calls
   if (ActivityCompat.shouldShowRequestPermissionRationale(this,
   Manifest.permission.CALL_PHONE)) {

   new AlertDialog.Builder(this)
   .setTitle("Permission needed")
   .setMessage("This permission is needed to make phone calls")
   .setPositiveButton("ok", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
   ActivityCompat.requestPermissions(MainActivity.this,
   new String[]{Manifest.permission.CALL_PHONE}, REQUEST_PHONE_CALL);
   }
   })
   .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
   @Override
   public void onClick(DialogInterface dialog, int which) {
   dialog.dismiss();
   }
   })
   .create().show();

   } else {
   ActivityCompat.requestPermissions(this,
   new String[]{Manifest.permission.CALL_PHONE}, REQUEST_PHONE_CALL);

   }

   button = (Button) findViewById(R.id.buttonCall);
// button click event listener summons phone call :
   button.setOnClickListener(new View.OnClickListener() {
   public void onClick(View arg0) {
   Intent callIntent = new Intent(Intent.ACTION_CALL);
   callIntent.setData(Uri.parse("tel:0528260610"));
   if (ActivityCompat.checkSelfPermission(MainActivity.this,
   Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
   return;
   }
   startActivity(callIntent);
   }
   });

   }

}

please read java doc in main Java.

if you are in a different java class change startActivity(callIntent);
to context.startActivity(callIntent);

context = this.context from any activity

_________________
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super Posts : 511 Join date : 2011-08-02

open the developer options in galaxy s7 edge after the update :
about phone
software details
tap build 7 times

Shocked

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android mobile app development grimoire - Page 2 2ddn6h

android studio access phone contact list walkthrough

A add manifest premission :
<uses-permission android:name="android.permission.READ_CONTACTS"/>

B activity_main.xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">

   <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   >
   <ListView
   android:id="@+id/list"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   />
   </RelativeLayout>

</android.support.constraint.ConstraintLayout>

C add layout file in dir : res, layout : simple_list_item_1.xml (the partinias):

Code:: <TextView xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/text1"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:padding="5dp"
   android:textColor="@android:color/black" />

D MainActivity java code :

Code:: package com.justforum.yotamarker.mycontacts;

import java.util.ArrayList;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.provider.ContactsContract;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import static android.Manifest.permission.READ_CONTACTS;
public class MainActivity extends Activity {
   private static final int REQUEST_READ_CONTACTS = 444;
   private ListView mListView;
   private ProgressDialog pDialog;
   private Handler updateBarHandler;
   ArrayList<String> contactList;
   Cursor cursor;
   int counter;
   @Override
   public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   pDialog = new ProgressDialog(MainActivity.this);
   pDialog.setMessage("Reading contacts...");
   pDialog.setCancelable(false);
   pDialog.show();
   mListView = (ListView) findViewById(R.id.list);
   updateBarHandler = new Handler();
   // Since reading contacts takes more time, let's run it on a separate thread.
   new Thread(new Runnable() {
   @Override
   public void run() {
   getContacts();
   }
   }).start();
   // Set onclicklistener to the list item.
   mListView.setOnItemClickListener(new OnItemClickListener() {
   @Override
   public void onItemClick(AdapterView<?> parent, View view,
   int position, long id) {
   //TODO Do whatever you want with the list data
   Toast.makeText(getApplicationContext(), "item clicked : \n" + contactList.get(position), Toast.LENGTH_SHORT).show();
   }
   });
   }
   private boolean mayRequestContacts() {
   if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
   return true;
   }
   if (checkSelfPermission(READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) {
   return true;
   }
   if (shouldShowRequestPermissionRationale(READ_CONTACTS)) {
   requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
   } else {
   requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
   }
   return false;
   }
   /**
   * Callback received when a permissions request has been completed.
   */
   @Override
   public void onRequestPermissionsResult(int requestCode, String[] permissions,
   int[] grantResults) {
   if (requestCode == REQUEST_READ_CONTACTS) {
   if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
   getContacts();
   }
   }
   }
   public void getContacts() {
   if (!mayRequestContacts()) {
   return;
   }
   contactList = new ArrayList<String>();
   String phoneNumber = null;
   String email = null;
   Uri CONTENT_URI = ContactsContract.Contacts.CONTENT_URI;
   String _ID = ContactsContract.Contacts._ID;
   String DISPLAY_NAME = ContactsContract.Contacts.DISPLAY_NAME;
   String HAS_PHONE_NUMBER = ContactsContract.Contacts.HAS_PHONE_NUMBER;
   Uri PhoneCONTENT_URI = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
   String Phone_CONTACT_ID = ContactsContract.CommonDataKinds.Phone.CONTACT_ID;
   String NUMBER = ContactsContract.CommonDataKinds.Phone.NUMBER;
   Uri EmailCONTENT_URI = ContactsContract.CommonDataKinds.Email.CONTENT_URI;
   String EmailCONTACT_ID = ContactsContract.CommonDataKinds.Email.CONTACT_ID;
   String DATA = ContactsContract.CommonDataKinds.Email.DATA;
   StringBuffer output;
   ContentResolver contentResolver = getContentResolver();
   cursor = contentResolver.query(CONTENT_URI, null, null, null, null);
   // Iterate every contact in the phone
   if (cursor.getCount() > 0) {
   counter = 0;
   while (cursor.moveToNext()) {
   output = new StringBuffer();
   // Update the progress message
   updateBarHandler.post(new Runnable() {
   public void run() {
   pDialog.setMessage("Reading contacts : " + counter++ + "/" + cursor.getCount());
   }
   });
   String contact_id = cursor.getString(cursor.getColumnIndex(_ID));
   String name = cursor.getString(cursor.getColumnIndex(DISPLAY_NAME));
   int hasPhoneNumber = Integer.parseInt(cursor.getString(cursor.getColumnIndex(HAS_PHONE_NUMBER)));
   if (hasPhoneNumber > 0) {
   output.append("\n First Name:" + name);
   //This is to read multiple phone numbers associated with the same contact
   Cursor phoneCursor = contentResolver.query(PhoneCONTENT_URI, null, Phone_CONTACT_ID + " = ?", new String[]{contact_id}, null);
   while (phoneCursor.moveToNext()) {
   phoneNumber = phoneCursor.getString(phoneCursor.getColumnIndex(NUMBER));
   output.append("\n Phone number:" + phoneNumber);
   }
   phoneCursor.close();
   // Read every email id associated with the contact
   Cursor emailCursor = contentResolver.query(EmailCONTENT_URI, null, EmailCONTACT_ID + " = ?", new String[]{contact_id}, null);
   while (emailCursor.moveToNext()) {
   email = emailCursor.getString(emailCursor.getColumnIndex(DATA));
   output.append("\n Email:" + email);
   }
   emailCursor.close();
   String columns[] = {
   ContactsContract.CommonDataKinds.Event.START_DATE,
   ContactsContract.CommonDataKinds.Event.TYPE,
   ContactsContract.CommonDataKinds.Event.MIMETYPE,
   };
   String where = ContactsContract.CommonDataKinds.Event.TYPE + "=" + ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
   " and " + ContactsContract.CommonDataKinds.Event.MIMETYPE + " = '" + ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE + "' and " + ContactsContract.Data.CONTACT_ID + " = " + contact_id;
   String[] selectionArgs = null;
   String sortOrder = ContactsContract.Contacts.DISPLAY_NAME;
   Cursor birthdayCur = contentResolver.query(ContactsContract.Data.CONTENT_URI, columns, where, selectionArgs, sortOrder);
   Log.d("BDAY", birthdayCur.getCount()+"");
   if (birthdayCur.getCount() > 0) {
   while (birthdayCur.moveToNext()) {
   String birthday = birthdayCur.getString(birthdayCur.getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
   output.append("Birthday :" + birthday);
   Log.d("BDAY", birthday);
   }
   }
   birthdayCur.close();
   }
   // Add the contact to the ArrayList
   contactList.add(output.toString());
   }
   // ListView has to be updated using a ui thread
   runOnUiThread(new Runnable() {
   @Override
   public void run() {
   ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.simple_list_item_1, R.id.text1, contactList);
   mListView.setAdapter(adapter);
   }
   });
   // Dismiss the progressbar after 500 millisecondds
   updateBarHandler.postDelayed(new Runnable() {
   @Override
   public void run() {
   pDialog.cancel();
   }
   }, 500);
   }
   }
}

keynotes : you can get the actual data from the variable output = new StringBuffer();
for example store it into a dictionary key = name, value = rest of the data.

or from the var : ArrayList<String> contactList; using a regex to get the string part you want per contact

2nd keynote : the main java contains code for using a thread to run code in parallal (on an additional cpu core)
which speeds up the app. clown

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android xml main attributes mini grimoire

button :

Code:: <Button
   android:onClick="TestHelloWorld"
   android:id="@+id/button"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignParentStart="true"
   android:layout_centerVertical="true"
   android:layout_marginStart="63dp"
   android:text="Button" />

relative layout :

Code:: <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
<RelativeLayout
   android:layout_width="match_parent"
   android:layout_height="match_parent">

   
   <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Hello World!"
   app:layout_constraintBottom_toBottomOf="parent"
   app:layout_constraintLeft_toLeftOf="parent"
   app:layout_constraintRight_toRightOf="parent"
   app:layout_constraintTop_toTopOf="parent" />
</RelativeLayout>


</android.support.constraint.ConstraintLayout>

text attributes :
android:textAlignment="center"
android:hint="enter Item"
android:textAllCaps="false" allow caps chars
android:layout_centerHorizontal="true" center the item on the UserInterface

android:layout_centerHorizontal="true"
android:layout_centerVertical="true" full center iten on UI

android:padding="30dp"

android:layout_marginTop="15dp"
android:layout_marginLeft="40dp"

android:layout_toRightOf="@id/txtName" place item to right of other item

android:textAppearance="?android:attr/textAppearanceLarge" large text

android:textSize="16dp"
android:visibility="invisible"

set item size :

android:layout_width="100dp"
android:layout_height="200dp"

LinearLayout and gravity atrribute :

Code:: <LinearLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   android:gravity="center">

   <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Hello World!1"
   android:id="@+id/lbl1"
   />
   <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Hello World!2"
   android:id="@+id/lbl2"
   android:layout_gravity="left"
   />
   <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Hello World!3"
   android:id="@+id/lbl3"
   android:layout_gravity="right"
   />

   </LinearLayout>

android:textColor="#a548d419" color

example login screen :

Code:: <?xml version = "1.0" encoding = "utf-8"?>
<RelativeLayout xmlns:android = "http://schemas.android.com/apk/res/android"
xmlns:tools = "http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height = "match_parent" android:paddingLeft= "16dp"
android:background="#FFF"
android:paddingRight = "16dp"
android:paddingTop = "16dp"

android:paddingBottom = "16dp" tools:context = ".MainActivity">

<TextView android:text = "crypto" android:layout_width="wrap_content"
android:textColor="#40b810"
android:layout_height = "wrap_content"
android:id = "@+id/textview"
android:textSize = "35dp"
android:layout_alignParentTop = "true"
android:layout_centerHorizontal = "true" />

<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:textColor="#40b810"
android:text = "wallet 3.2"
android:id = "@+id/textView"
android:layout_below = "@+id/textview"
android:layout_centerHorizontal = "true"
android:textSize = "35dp" />

<EditText
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:id = "@+id/editText"
android:hint = "Enter email"
android:inputType="textEmailAddress"
android:focusable = "true"
android:textColorHighlight = "#ff7eff15"
android:textColorHint = "#ffff25e6"
android:layout_marginTop = "46dp"
android:layout_below = "@+id/imageView"
android:layout_alignParentLeft = "true"
android:layout_alignParentStart = "true"
android:layout_alignParentRight = "true"
android:layout_alignParentEnd = "true" />

<ImageView
android:layout_width="wrap_content"
android:layout_height="100dp"
android:id="@+id/imageView"
android:src="@drawable/crypto"
android:layout_below="@+id/textView"
android:layout_centerHorizontal="true" />

<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="@+id/txtPass"
android:layout_below="@+id/editText"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignRight="@+id/editText"
android:layout_alignEnd="@+id/editText"
android:textColorHint="#ffff299f"
android:hint="Password" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Attempts Left:"
android:id="@+id/textView2"
android:layout_below="@+id/txtPass"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:textSize="25dp" />

<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="login"
android:src="@drawable/register"
android:id="@+id/button"
android:background="@null"
android:layout_alignParentBottom="true"
android:layout_toLeftOf="@+id/textview"
android:layout_toStartOf="@+id/textview" />

<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cancel"
android:src="@drawable/login"
android:background="@null"
android:id="@+id/ivLogin"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/textview"
android:layout_toEndOf="@+id/textview" />

</RelativeLayout>

hadouken

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android mobile app development grimoire - Page 2 2dk8dv

main xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <RelativeLayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:background="@drawable/matrix3"
   >
<LinearLayout
   android:id="@+id/ll1"
   android:layout_width="match_parent"
   android:layout_height="200dp">
   <TextView android:id="@+id/intro"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Enter some text:"
   android:layout_gravity="top"
   android:textColor="#037117"
   />
   <EditText android:id="@+id/enter"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_gravity="center"
   android:text="text"
   android:textColor="#037117"
   />
   />
</LinearLayout>
   <Button android:id="@+id/speak"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Speak"
   android:layout_below="@id/ll1"
   android:textColor="#037117"
   />
   </RelativeLayout>
</android.support.constraint.ConstraintLayout>

main java code :

Code:: package com.justforum.yotamarker.tts1;

import android.speech.tts.TextToSpeech;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;

import java.util.Locale;

public class MainActivity extends AppCompatActivity {
TextToSpeech t1;
EditText write;
Button speakbtn;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

write=(EditText) findViewById(R.id.enter);
speakbtn=(Button)findViewById(R.id.speak);

t1=new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (status != TextToSpeech.ERROR) {
t1.setLanguage(Locale.UK);
}
}
});
speakbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String toSpeak = write.getText().toString();
Toast.makeText(getApplicationContext(), toSpeak, Toast.LENGTH_SHORT).show();
t1.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null);
}
});

}
@Override
public void onDestroy() {
// Don't forget to shutdown tts!
if (t1 != null) {
t1.stop();
t1.shutdown();
}
super.onDestroy();
}
}

notice at t1.setLanguage(Locale.UK) you can change the accent.

alternative code main java (stronger) :

Code:: package com.justforum.yotamarker.tts1;

import android.content.Intent;
import android.os.Build;
import android.speech.tts.TextToSpeech;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.util.Locale;
import android.app.Activity;
import android.os.Bundle;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.view.View;
import android.widget.EditText;
import android.speech.tts.TextToSpeech;
import android.speech.tts.TextToSpeech.OnInitListener;
import android.content.Intent;
import java.util.Locale;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements OnClickListener, OnInitListener {

   //TTS object
   private TextToSpeech myTTS;
   //status check code
   private int MY_DATA_CHECK_CODE = 0;

   //create the Activity
   public void onCreate(Bundle savedInstanceState) {

   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);

   //get a reference to the button element listed in the XML layout
   Button speakButton = (Button)findViewById(R.id.speak);
   //listen for clicks
   speakButton.setOnClickListener(this);

   //check for TTS data
   Intent checkTTSIntent = new Intent();
   checkTTSIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
   startActivityForResult(checkTTSIntent, MY_DATA_CHECK_CODE);
   }

   //respond to button clicks
   public void onClick(View v) {

   //get the text entered
   EditText enteredText = (EditText)findViewById(R.id.enter);
   String words = enteredText.getText().toString();
   speakWords(words);
   }

   //speak the user text
   private void speakWords(String speech) {

   //speak straight away
   /*
   * if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
   myTTS.speak(speech, TextToSpeech.QUEUE_FLUSH, null, null);
   }else{
   myTTS.speak(speech, TextToSpeech.QUEUE_FLUSH, null); // deprecated
   }
   * */

   myTTS.speak(speech, TextToSpeech.QUEUE_FLUSH, null,null);
   }

   //act on result of TTS data check
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {

   if (requestCode == MY_DATA_CHECK_CODE) {
   if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
   //the user has the necessary data - create the TTS
   myTTS = new TextToSpeech(this, this);
   }
   else {
   //no data - install it now
   Intent installTTSIntent = new Intent();
   installTTSIntent.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
   startActivity(installTTSIntent);
   }
   }
   }

   //setup TTS
   public void onInit(int initStatus) {

   //check for successful instantiation
   if (initStatus == TextToSpeech.SUCCESS) {
   if(myTTS.isLanguageAvailable(Locale.US)==TextToSpeech.LANG_AVAILABLE)
   myTTS.setLanguage(Locale.US);
   }
   else if (initStatus == TextToSpeech.ERROR) {
   Toast.makeText(this, "Sorry! Text To Speech failed...", Toast.LENGTH_LONG).show();
   }
   }
}

hadouken

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progress dialog bar and progress dialog ring :

manifest :

Code:: <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.justforum.yotamarker.progressdialog"
   android:versionCode="1"
   android:versionName="1.0"
   >
   <uses-sdk
   android:minSdkVersion="8"
   android:targetSdkVersion="19" />
   <application
   android:allowBackup="true"
   android:icon="@mipmap/ic_launcher"
   android:label="@string/app_name"
   android:roundIcon="@mipmap/ic_launcher_round"
   android:supportsRtl="true"
   android:theme="@style/AppTheme">
   <activity android:name=".MainActivity">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />

   <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
   </activity>
   </application>

</manifest>

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" /> was added.

main xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">

   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical" >
   <TextView android:id="@+id/infotext"
   android:layout_marginTop="50dp"
   android:text="Click the button to see how Progress dialog works.."
   android:layout_height="wrap_content"
   android:layout_width="match_parent"/>
   <Button
   android:id="@+id/btn1"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:onClick="launchBarDialog"
   android:text="ProgressDialog Bar" />
   <Button
   android:id="@+id/btn2"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:onClick="launchRingDialog"
   android:text="ProgressDialog Ring" />
   </LinearLayout>

</android.support.constraint.ConstraintLayout>

main activity java code :

Code:: package com.justforum.yotamarker.progressdialog;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
public class MainActivity extends Activity {
   ProgressDialog barProgressDialog;
   Handler updateBarHandler;
   /*
   * //
()=========>>=========================--
   \\
   * />
( //------------------------------------------------------(
(*)OXOXOXOXO(*> -------- \
( \\--------------------------------------------------------)
   \>
   *
   * */
   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   updateBarHandler=new Handler();
   }
   public void launchRingDialog(View view) {
   final ProgressDialog ringProgressDialog = ProgressDialog.show(MainActivity.this, "Please wait ...", "Downloading Image ...", true);
   ringProgressDialog.setCancelable(true);
   new Thread(new Runnable() {
   @Override
   public void run() {
   try {
   // Here you should write your time consuming task...
   // Let the progress ring for 10 seconds...
   Thread.sleep(10000);
   } catch (Exception e) {
   }
   ringProgressDialog.dismiss();
   }
   }).start();
   }
   public void launchBarDialog(View view) {
   barProgressDialog = new ProgressDialog(MainActivity.this);
   barProgressDialog.setTitle("Downloading Image ...");
   barProgressDialog.setMessage("Download in progress ...");
   barProgressDialog.setProgressStyle(barProgressDialog.STYLE_HORIZONTAL);
   barProgressDialog.setProgress(0);
   barProgressDialog.setMax(20);
   barProgressDialog.show();
   new Thread(new Runnable() {
   @Override
   public void run() {
   try {
   // Here you should write your time consuming task...
   while (barProgressDialog.getProgress() <= barProgressDialog.getMax()) {
   Thread.sleep(2000);
   updateBarHandler.post(new Runnable() {
   public void run() {
   barProgressDialog.incrementProgressBy(2);
   }
   });
   if (barProgressDialog.getProgress() == barProgressDialog.getMax()) {
   barProgressDialog.dismiss();
   }
   }
   } catch (Exception e) {
   }
   }
   }).start();
   }
}

each button runs a different prog bar.
place your code instead of the Thread.sleep(x);

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https://icons8.com/

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android mobile app development grimoire - Page 2 2dn12w

add permission to manifest xml :

<uses-permission android:name="android.permission.INTERNET"/>

add implementation 'com.github.bumptech.glide:glide:4.7.1' to gradle module :

Code:: apply plugin: 'com.android.application'

android {
   compileSdkVersion 27
   defaultConfig {
   applicationId "com.justforum.yotamarker.urlimage"
   minSdkVersion 21
   targetSdkVersion 27
   versionCode 1
   versionName "1.0"
   testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
   }
   buildTypes {
   release {
   minifyEnabled false
   proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
   }
   }
}

dependencies {
   implementation fileTree(dir: 'libs', include: ['*.jar'])
   implementation 'com.android.support:appcompat-v7:27.1.1'
   implementation 'com.android.support.constraint:constraint-layout:1.1.2'
   implementation 'com.github.bumptech.glide:glide:4.7.1'

   testImplementation 'junit:junit:4.12'
   androidTestImplementation 'com.android.support.test:runner:1.0.2'
   androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

main xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
<RelativeLayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="16dp"
   >

   <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Hello World!"
   android:id="@+id/txt1"
   app:layout_constraintBottom_toBottomOf="parent"
   app:layout_constraintLeft_toLeftOf="parent"
   app:layout_constraintRight_toRightOf="parent"
   app:layout_constraintTop_toTopOf="parent" />
   <ImageView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_below="@id/txt1"
   android:id="@+id/imageview1"
   android:src="@drawable/ic_launcher_background"
   />

</RelativeLayout>

</android.support.constraint.ConstraintLayout>

main java :

Code:: package com.justforum.yotamarker.urlimage;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;

import com.bumptech.glide.Glide;

public class MainActivity extends AppCompatActivity {
ImageView iv1;
Context context = this.context;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   iv1 = findViewById(R.id.imageview1);

   Glide.with(this).load("http://pacific.network/wp-content/uploads/2017/02/hadoken.jpg").into(iv1);
   }
}

make sure the url is correct.

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add : dimens.xml in res,values

Code:: <?xml version="1.0" encoding="utf-8"?>
<resources>
<dimen name="edge">16dp</dimen>

</resources>

main xml :

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_margin="@dimen/edge"
>

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="My List"
android:gravity="center"
android:textSize="22sp"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add Data"
android:background="#009fff"
android:textColor="#fff"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:id="@+id/btnAdd"
/>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/myLst"/>
</LinearLayout>

the 16dp edge makes the app more comfortable to use. Wink

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android mobile app development grimoire - Page 2 2dt3cq

AndroidManifest.xml :

add : <uses-permission android:name="android.permission.RECORD_AUDIO"/>

activity_main.xml :

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   android:background="#000">

   <LinearLayout
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   android:layout_margin="16dp">
   <ImageView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@drawable/mic"
   android:layout_gravity="center"
   android:id="@+id/imgMic"/>
   <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:textSize="32sp"
   android:text="@string/micTap"
   android:layout_gravity="center"
   android:layout_marginTop="16dp"
   android:layout_marginBottom="16dp"
   android:id="@+id/txtMic"
   android:textColor="#fff"/>
   <ListView
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:id="@+id/lstResult"
   />
   </LinearLayout>
</LinearLayout>

string.xml (res, values directory):

Code:: <resources>
   <string name="app_name">STT</string>
   <string name="micTap">Tap Mic for command</string>
   <string name="permission_denied">permission denied</string>
   <string name="recIntent">Speak to phone</string>
</resources>

MainActivity.java :

Code:: package com.justforum.yotamarker.stt1;

import android.Manifest;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.speech.RecognizerIntent;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

public class MainActivity extends AppCompatActivity {

   private TextView txtDesc;
   private ImageView imgMic;
   private ListView lstRes;
   private Context context;
   private boolean hasAudioPermission = false;

   private final int REQUEST_CODE = 1;
   private final int RECOGNITION_RESULT = 2;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   setPointer();
   askPermission();
   }

   private void askPermission() {
   //create a list of permissions
   List<String> listPerm = new ArrayList<>(); // contains the recog results per talk
   //get permission status for audio record
   int audioPerm = ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO);
   //check if the record audio permission is granted
   if (audioPerm != PackageManager.PERMISSION_GRANTED) {
   listPerm.add(Manifest.permission.RECORD_AUDIO);
   } else {
   hasAudioPermission = true;
   }

   //check if our list is not empty, and ask permission for it's items.
   if (!listPerm.isEmpty()) {
   //ask permission by requests.
   ActivityCompat.requestPermissions(this, listPerm.toArray(new String[listPerm.size()]), REQUEST_CODE);
   }

   }

   @Override
   public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
   super.onRequestPermissionsResult(requestCode, permissions, grantResults);
   if (grantResults.length > 0) {
   if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
   //we can do what ever we like.
   hasAudioPermission = true;
   } else {
   //tell the user that we can't work, becuase we don't have a permission
   Toast.makeText(context, getResources().getString(R.string.permission_denied), Toast.LENGTH_SHORT).show();
   }
   }
   }

   private void setPointer() {
   this.context = this;
   txtDesc = findViewById(R.id.txtMic);
   imgMic = findViewById(R.id.imgMic);
   lstRes = findViewById(R.id.lstResult);
   imgMic.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
   runSpeechRecognition();
   }
   });
   }

   private void runSpeechRecognition() {
   //handle the speech recognition intent
   Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
   //tell the intent that we want to speak freely
   intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
   //tell the intent that we want to use the default language
   intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, Locale.getDefault());
   //show the user a text to explain what we want.
   intent.putExtra(RecognizerIntent.EXTRA_PROMPT, getResources().getString(R.string.recIntent));
   if (hasAudioPermission) {
   try {
   startActivityForResult(intent, RECOGNITION_RESULT);
   } catch (ActivityNotFoundException e) {
   Log.e("err", "runSpeechRecognition: " + e.getMessage());
   Toast.makeText(context, "ERROR", Toast.LENGTH_SHORT).show();
   } catch (Exception e) {
   Log.e("WTF", "runSpeechRecognition: " + e.getMessage());
   }
   }
   }

   @Override
   protected void onActivityResult(int requestCode, int resultCode, Intent data) {
   super.onActivityResult(requestCode, resultCode, data);
   switch (requestCode) {
   //in case the request code is 2 - recognition intent
   case RECOGNITION_RESULT:
   if (resultCode == RESULT_OK && data != null)
   {
   //get array list of all our result (can be 1, can be 5)
   ArrayList<String> result = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
   LangAdapter myAdapter = new LangAdapter(context,result);
   lstRes.setAdapter(myAdapter);
   }
   break;

   default:
   Toast.makeText(context, "the programmer is not so bright", Toast.LENGTH_SHORT).show();
   }
   }
}

add : mic.png to res, drawable

LangAdapter.java :

Code:: package com.justforum.yotamarker.stt1;

import android.content.Context;
import android.graphics.Color;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.ArrayList;

public class LangAdapter extends BaseAdapter {
   Context context;
   ArrayList<String> myResult;

   public LangAdapter(Context context, ArrayList<String> myResult) {
   this.context = context;
   this.myResult = myResult;
   }

   @Override
   public int getCount() {
   return myResult.size();
   }

   @Override
   public Object getItem(int position) {
   return null;
   }

   @Override
   public long getItemId(int position) {
   return 0;
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
   TextView txt = new TextView(context);
   txt.setText(myResult.get(position));
   txt.setTextColor(Color.WHITE);
   return txt;
   }
}

key note :
access the result :
String x = result.get(0).trim().toLowerCase().substring(1,result.get(0).trim().length()) + "";
place it in : onActivityResult in switch (requestCode) in if (resultCode == RESULT_OK && data != null)
{
(line 131)

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android mobile app development grimoire - Page 2 2dz50q

Add dependency in your app module
dependencies {
implementation 'com.sdsmdg.tastytoast:tastytoast:0.1.1'
}

Usage
Java
TastyToast.makeText(getApplicationContext(), "Hello World !", TastyToast.LENGTH_LONG, TastyToast.WARNING);

example code for main java :

Code:: package com.justforum.yotamarker.tastytoast;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.sdsmdg.tastytoast.TastyToast;

public class MainActivity extends AppCompatActivity {

   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   TastyToast.makeText(getApplicationContext(), "Hello World !", TastyToast.LENGTH_LONG, TastyToast.SUCCESS);
   // type TastyToast. at TastyToast.SUCCESS to see more options
   }
}

special toast

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android mobile app development grimoire - Page 2 2e1ycu

r

the following app parses the relevant data fields from an xml and json file :
json code path :
getDATAJSON()

xml path :
setPointer();
//get my data - XML
getDataXML();

and displays on the listview (which uses the adapter which uses the clscur java class)

main xml :

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical" >

   <ListView
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:id="@+id/myLst"/>

</LinearLayout>

manifest :
<uses-permission android:name="android.permission.INTERNET"/>

MainActivity.java :

Code:: package com.justforum.yotamarker.jsonplusxml;

import android.annotation.SuppressLint;
import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;

import org.json.JSONException;
import org.json.JSONObject;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

public class MainActivity extends AppCompatActivity {

   private List<ClsCur> myCurList;
   private String xmlString = "";
   private String jsonString = "";
   private final String XML_URL = "http://www.boi.org.il/currency.xml";
   private final String JSON_URL = "https://api.darksky.net/forecast/f13189b34ee908d0e07ba487133fa847/32.0844224,34.8029073";
   private Context context;
   ListView lstCur;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   setPointer();
   //get my data - XML
   getDataXML();
   getDataJSON();

   }

   private void setPointer() {
   this.context = this;
   myCurList = new ArrayList<>();
   lstCur = findViewById(R.id.myLst);

   }

   @SuppressLint("StaticFieldLeak")
   public void getDataXML() {
   //we never use void in AsyncTask, we need to use Void
   new AsyncTask<Void, Void, String>() {
   @Override
   protected String doInBackground(Void... voids) {
   //we need to open HTTP URL Connection to our desired URL (www.boi.org.il)
   HttpURLConnection connection = null;
   try {
   connection = (HttpURLConnection) new URL(XML_URL).openConnection();
   BufferedReader buf = new BufferedReader(new InputStreamReader(connection.getInputStream()));
   String line;
   while ((line = buf.readLine()) != null) {
   xmlString += line;
   }
   } catch (IOException e) {
   e.printStackTrace();
   } finally {
   connection.disconnect();
   }

   return xmlString;
   }

   @Override
   protected void onPostExecute(String xmlString) {
   super.onPostExecute(xmlString);
   Log.e("XML", "onPostExecute: " + xmlString);
   parseXML(xmlString);
   }
   }.execute();
   }

   private void parseXML(String xmlString) {
   //we will create a document builder that will allow us an easier access to our XML String
   DocumentBuilder builder;
   try {
   Log.e("XML", "onPostExecute: " + xmlString);
   builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
   Document DOM = builder.parse(new InputSource(new StringReader(xmlString)));

   //our xml structure
   NodeList itemName = DOM.getElementsByTagName("NAME");
   NodeList itemUnit = DOM.getElementsByTagName("UNIT");
   NodeList itemCur = DOM.getElementsByTagName("CURRENCYCODE");
   NodeList itemCountry = DOM.getElementsByTagName("COUNTRY");
   NodeList itemRate = DOM.getElementsByTagName("RATE");
   NodeList itemChange = DOM.getElementsByTagName("CHANGE");

   //let got on our entire collection to get the data
   for (int counter = 0; counter < itemName.getLength(); counter += 1) {
   myCurList.add(new ClsCur(
   itemName.item(counter).getTextContent(),
   Integer.parseInt(itemUnit.item(counter).getTextContent()),
   itemCur.item(counter).getTextContent(),
   itemCountry.item(counter).getTextContent(),
   Float.parseFloat(itemRate.item(counter).getTextContent()),
   Float.parseFloat(itemChange.item(counter).getTextContent())
   ));
   }
   Adapter_Cur myAdapter = new Adapter_Cur(context, myCurList);
   lstCur.setAdapter(myAdapter);
   } catch (ParserConfigurationException | SAXException | IOException e) {
   e.printStackTrace();
   }

   }

   @SuppressLint("StaticFieldLeak")
   public void getDataJSON() {
   //we never use void in AsyncTask, we need to use Void
   new AsyncTask<Void, Void, String>() {
   @Override
   protected String doInBackground(Void... voids) {
   //we need to open HTTP URL Connection to our desired URL (www.boi.org.il)
   HttpURLConnection connection = null;
   try {
   connection = (HttpURLConnection) new URL(JSON_URL).openConnection();
   BufferedReader buf = new BufferedReader(new InputStreamReader(connection.getInputStream()));
   String line;
   while ((line = buf.readLine()) != null) {
   jsonString += line;
   }
   } catch (IOException e) {
   e.printStackTrace();
   } finally {
   connection.disconnect();
   }

   return jsonString;
   }

   @Override
   protected void onPostExecute(String jsonString) {
   super.onPostExecute(jsonString);
   Log.e("XML", "onPostExecute: " + jsonString);
   parseJson(jsonString);
   }
   }.execute();
   }

   private void parseJson(String jsonString) {
   //declaring the json object and passing the string to it.
   try {
   //get the entire string and treat it as a JSON object
   JSONObject jsonObject = new JSONObject(jsonString);
   //get the currently object
   JSONObject currently = jsonObject.getJSONObject("currently");
   Log.e("currently", "parseJson: "+currently );
   //get the summry which is a string.
   String summary = currently.getString("summary");
   //get the temp.
   Double temp = currently.getDouble("temperature");
   // f->c
   int tempC=(int)(((temp-32)*(5/9.0))*100)/100;
   int hum=(int)(currently.getDouble("humidity")*100);
   String display = "summary:"+summary+" tempC:"+tempC+"Cel. humidity:"+hum+"%";
   Log.e("JSON", "parseJson: "+display );
   } catch (JSONException e) {
   e.printStackTrace();
   }
   }
}

Adapter_Cur java (4 D xml listview):

Code:: package com.justforum.yotamarker.jsonplusxml;

import android.annotation.SuppressLint;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class Adapter_Cur extends BaseAdapter {
   Context context;
   List<ClsCur> lstCur;

   public Adapter_Cur(Context context, List<ClsCur> lstCur) {
   this.context = context;
   this.lstCur = lstCur;
   }

   @Override
   public int getCount() {
   return lstCur.size();
   }

   @Override
   public Object getItem(int position) {
   return null;
   }

   @Override
   public long getItemId(int position) {
   return 0;
   }

   @SuppressLint("SetTextI18n")
   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
   TextView txt = new TextView(context);
   txt.setText(lstCur.get(position).getCountry() + " " +
   lstCur.get(position).getRate() + " " +
   lstCur.get(position).getChange());
   return txt;
   }
}

ClsCur java class (stores the xml data):

Code:: package com.justforum.yotamarker.jsonplusxml;

public class ClsCur {
   private String name;
   private int unit;
   private String currencycode;
   private String country;
   private float rate;
   private float change;

   public ClsCur(String name, int unit, String currencycode, String country, float rate, float change) {
   this.name = name;
   this.unit = unit;
   this.currencycode = currencycode;
   this.country = country;
   this.rate = rate;
   this.change = change;
   }

   public String getName() {
   return name;
   }

   public int getUnit() {
   return unit;
   }

   public String getCurrencycode() {
   return currencycode;
   }

   public String getCountry() {
   return country;
   }

   public float getRate() {
   return rate;
   }

   public float getChange() {
   return change;
   }
}

xml & json parse
https://jsoneditoronline.org/

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android mobile app development grimoire - Page 2 2efhkz

add :
implementation 'com.android.support:recyclerview-v7:27.1.1'
implementation 'com.android.support:cardview-v7:27.1.1'
to gradle module so it looks like :

Code:: apply plugin: 'com.android.application'

android {
compileSdkVersion 27
defaultConfig {
applicationId ""
minSdkVersion 21
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
implementation 'com.android.support:recyclerview-v7:27.1.1'
implementation 'com.android.support:cardview-v7:27.1.1'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

res/layout :
activity_main xml :

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="16dp"
android:orientation="vertical">

<Button
android:id="@+id/btnAdd"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add" />

<android.support.v7.widget.RecyclerView
android:id="@+id/myList"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>

res/layout/item.xml (the recycler item with the card view) :

Code:: <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="100dp"
android:id="@+id/myItem"
style="@style/Base.CardView"
android:layout_gravity="center"
android:layout_margin="16dp"
android:animateLayoutChanges="?android:attr/windowOverscan"
android:elevation="10dp"
app:cardCornerRadius="20dp"
app:contentPadding="10dp">

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layoutDirection="locale">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/txtName"
android:layout_alignParentTop="true"
android:text="אלכס טזי"
android:textColor="#0f0"
android:textSize="26sp"
android:textStyle="bold|italic"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/txtSlogan"
android:layout_below="@id/txtName"
android:layout_marginTop="10dp"
android:shadowColor="@color/cardview_shadow_start_color"
android:shadowDx="10"
android:shadowDy="10"
android:text="אלכס חבר של הפקח, סמי סביב"
android:textColor="#00f"
android:textSize="18sp"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:text="delete"
android:id="@+id/btnMoti"
/>
</RelativeLayout>

</android.support.v7.widget.CardView>
</LinearLayout>

DataObject.java :
(constructor and getters constructed with alt + insert)

Code:: public class DataObject {
private String mText1;
private String mText2;

public DataObject(String mText1, String mText2) {
this.mText1 = mText1;
this.mText2 = mText2;
}

public String getmText1() {
return mText1;
}

public String getmText2() {
return mText2;
}
}

MyRecyclerViewAdapter :

Code:: import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

import java.util.List;

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.DataObjectHolder> {

//set title for our tag
private final String TAG="RecyclerView Adapter";
//our data set list
private List<DataObject>lstDataSet;
//create interface for click listener
public interface MyClickListener{
void onItemClick(int position, View v);
}
//our click listener that will be sent by method (interface)
private MyClickListener myClickListener;

//our c'tor to our class :)
public MyRecyclerViewAdapter(List<DataObject> lstDataSet) {
this.lstDataSet = lstDataSet;
}

public class DataObjectHolder extends RecyclerView.ViewHolder implements View.OnClickListener
{
TextView victimName;
TextView victimSlogan;
Button btnDel;
//c'tor for our internal class which work as:
//1. set pointer
//2. set on click listener to our entire item.
public DataObjectHolder(View itemView)
{
super(itemView);
victimName=itemView.findViewById(R.id.txtName);
victimSlogan=itemView.findViewById(R.id.txtSlogan);
btnDel=itemView.findViewById(R.id.btnMoti);
itemView.setOnClickListener(this);
}

//because we declare interface as implementation of on click listener, we can add some extra
//information to our onclick.
//since we using the method getAdapterPosition(), which give us the index of the position
//now we hold the position and the view, instead of holding only the view without the position
@Override
public void onClick(View v) {
myClickListener.onItemClick(getAdapterPosition(),v);
}
}

//using the interface we set on click listener but for single item
public void setOnItemClickListener(MyClickListener myClickListener)
{
this.myClickListener=myClickListener;
}

//create a view holder, which will be created upon using it
@NonNull
@Override
public DataObjectHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
//inflate our card view row layout
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item,parent,false);
//set the inflated view to our holder
DataObjectHolder dataObjectHolder = new DataObjectHolder(view);
//return the data object holder
return dataObjectHolder;
}

@Override
public void onBindViewHolder(@NonNull DataObjectHolder holder, final int position) {
//set the label (our header which show index : XX)
holder.victimName.setText(lstDataSet.get(position).getmText1());
//set the slogan
holder.victimSlogan.setText(lstDataSet.get(position).getmText2());
//set delete button inside the card view
holder.btnDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
lstDataSet.remove(position);
notifyItemRemoved(position);
}
});
Log.e(TAG, "onBindViewHolder: "+lstDataSet.get(position).getmText1());
}

@Override
public int getItemCount() {
return lstDataSet.size();
}

//CRUD
public void addItem(DataObject dataObject, int index)
{
lstDataSet.add(index,dataObject);
notifyItemInserted(index);
}

public void deleteItem(int index)
{
lstDataSet.remove(index);
notifyItemRemoved(index);
}

}

MainActivity.java :

Code:: import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
private String[] victimName={"Zeev","Amital","Nipo","Buf","Sami","Eitan"};
private String[] victimSlogan={"hadoken","I from Chabad","I want to see asuka kazama ","Where is Alex Tazi","Move your car","Tell me when you land"};

//create a recycler view object
private RecyclerView myRecyclerView;
//create an (inner class) adapter for the recycler view
private RecyclerView.Adapter myAdapter;
//create a recycler view layout manager
private RecyclerView.LayoutManager myLayoutManager;

//our add button
Button btnAdd;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setPointer();
}

private void setPointer() {
//set pointer to recycler view
myRecyclerView = findViewById(R.id.myList);
//set fixed size for the item
myRecyclerView.setHasFixedSize(true);
//create a linear layout manager
myLayoutManager = new LinearLayoutManager(this);
//set our layout manger to our recycler view
myRecyclerView.setLayoutManager(myLayoutManager);
//create an adapter
myAdapter=new MyRecyclerViewAdapter(getDataSet());
//set the adapter
myRecyclerView.setAdapter(myAdapter);
btnAdd=findViewById(R.id.btnAdd);
btnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
((MyRecyclerViewAdapter)myAdapter).addItem(new DataObject("Bri Chakala","Nagsti ba gamba"),1);
}
});
}

private List<DataObject> getDataSet() {
List<DataObject> returnList = new ArrayList<>();
for (int counter=0;counter<victimName.length;counter+=1)
{
returnList.add(new DataObject(victimName[counter],victimSlogan[counter]));
}
return returnList;
}

@Override
protected void onPostResume() {
super.onPostResume();
((MyRecyclerViewAdapter)myAdapter).setOnItemClickListener(new MyRecyclerViewAdapter.MyClickListener() {
@Override
public void onItemClick(int position, View v) {
//((MyRecyclerViewAdapter)myAdapter).deleteItem(position);
Toast.makeText(v.getContext(), position + "", Toast.LENGTH_LONG).show();
}
});
}

}

in public void onItemClick(int position, View v) { in main activity java :
you place the onclick events. Sleep

_________________
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super Posts : 511 Join date : 2011-08-02

main java :

Code:: package com.justforum.yotamarker.menu1;

import android.app.ActionBar;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

private int groupID= Menu.FIRST;
private final int TEXT_ID = Menu.FIRST;
private final int IMAGE_ID = Menu.FIRST+1;
private final int VIDEO_ID = Menu.FIRST+2;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(groupID, TEXT_ID, TEXT_ID,"text");
menu.add(groupID, IMAGE_ID, IMAGE_ID,"image");
menu.add(groupID, VIDEO_ID, VIDEO_ID,"video");
return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// the onClick item event
switch (item.getItemId())
{
case TEXT_ID:
Toast.makeText(this, "text", Toast.LENGTH_SHORT).show();
break;

case VIDEO_ID:
Toast.makeText(this, "video", Toast.LENGTH_SHORT).show();
break;

case IMAGE_ID:
Toast.makeText(this, "image", Toast.LENGTH_SHORT).show();
break;

}
return super.onOptionsItemSelected(item);
}
}

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android mobile app development grimoire - Page 2 2ej1nt

choose navigation drawer activity when starting a new project.

the click events will be in the main activity in public boolean onNavigationItemSelected(MenuItem item) {

change the text and other text attributes from res folder : menu or layout folder in the xml files

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android mobile app development grimoire - Page 2 2ej38f

to remove the action bar from all activities: change :

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

to :
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">

to remove action bar from a certain activity
in AndroidManifest.xml :

change : per activity :
<activity android:name=".SignUpActivity"
android:theme="@style/AppTheme.NoActionBar"/>

In your AndroidManifest.xml use NoActionBar theme for your Activity like this:
<activity android:name=".SignUpActivity"
android:theme="@style/AppTheme.NoActionBar"/>

and in your styles.xml
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>

so it looks like :

Code:: <resources>


<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>

</resources>

and manifest looks like :

Code:: <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.justforum.yotamarker.btg">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity"
android:theme="@style/AppTheme.NoActionBar"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

you can alternatively do it by code :

from within your activity:
getActionBar().hide();
or
getSupportActionBar().hide();

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Code:: import android.content.Context;
import android.content.Intent;

public class Motti {
Intent shareIntent;
Context context;
String myType;

public Motti(Context context, String mimeType) {
this.context=context;
this.myType=mimeType;
}

public void startChooser()
{
//intent for sending action (like send image,audio,video,etc...)
shareIntent = new Intent(Intent.ACTION_SEND);
//set mime type
shareIntent.setType(myType+"/*");
//tell the user what you want to do....
shareIntent.putExtra(Intent.EXTRA_SUBJECT,"Moti want's to share");
//what i want to share (for example a text)
shareIntent.putExtra(Intent.EXTRA_TEXT,"Hello from motti :)");
//set a package
http://shareIntent.setPackage("com.whatsapp");
//start activity :)
context.startActivity(Intent.createChooser(shareIntent,"Send moti with:"));
}
}

using the class :
Motti x = new Motti(this.getApplicationContext(),"text");
x.startChooser();

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android mobile app development grimoire - Page 2 2eo9vh

res/layout/splash.xml :

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:orientation="vertical"
   android:layout_gravity="center">

   <ImageView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@drawable/ic_launcher_background" />

   <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Moti is loading"
   android:textSize="32sp"
   android:layout_gravity="center"/>

   <ProgressBar
   android:id="@+id/progressBar"
   style="?android:attr/progressBarStyle"
   android:layout_width="match_parent"
   android:layout_height="wrap_content" />

</LinearLayout>

SplashScreen.java :

Code:: package com.justforum.yotamarker.splash2;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;

public class SplashScreen extends AppCompatActivity {

   // duration of wait
   private final int SPLASH_DISPLAY_LENGTH = 3000;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.splash);

   new Handler().postDelayed(new Runnable() {
   @Override
   public void run() {
   startActivity(new Intent(SplashScreen.this,MainActivity.class));
   SplashScreen.this.finish();
   }
   }, SPLASH_DISPLAY_LENGTH);
   }
}

AndroidManifest.xml :

Code:: <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.justforum.yotamarker.splash2">

   <application
   android:allowBackup="true"
   android:icon="@mipmap/ic_launcher"
   android:label="@string/app_name"
   android:roundIcon="@mipmap/ic_launcher_round"
   android:supportsRtl="true"
   android:theme="@style/AppTheme">
   <activity android:name=".MainActivity">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />

   </intent-filter>
   </activity>
   <activity android:name=".SplashScreen">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />

   <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
   </activity>
   </application>

</manifest>

keynote : in manifest took <category android:name="android.intent.category.LAUNCHER" /> from main activity and put it in
<activity android:name=".SplashScreen">

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android mobile app development grimoire - Page 2 2epb9h

add manifest permission :
<uses-permission android:name="android.permission.VIBRATE"/>

main layout xml:

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:background="#009fff"
android:text="Vibrate me"
android:textColor="#fff"
android:textSize="22sp"
android:id="@+id/btnVibrate"/>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/lstWifi"/>
</LinearLayout>

MainActivity.java

Code:: package com.justforum.yotamarker.myvibrator;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import android.os.Vibrator;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
Button btnVibrate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setPointer();
}

private void setPointer() {
this.btnVibrate=findViewById(R.id.btnVibrate);
final Vibrator vib = (Vibrator) this.getSystemService(Context.VIBRATOR_SERVICE);
btnVibrate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
vibrate(5000, vib);
}
});
}

private void vibrate(int i, Vibrator v1) {

v1.vibrate(i); //vibrate for 500 milliseconds
}
}

make sure you enable vibration from your phone settings.

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android mobile app development grimoire - Page 2 2epdy0

manifest permissions :

Code:: <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
   <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
   <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
   <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

activity_main.xml :

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_margin="16dp"
>

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:background="#009fff"
android:text="Scan wi-fi"
android:textColor="#fff"
android:textSize="22sp"
android:id="@+id/btnWifiScan"/>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/lstWifi"/>
</LinearLayout>

WifiAdapter.java (for the list widgt containing the available wifi list) :

Code:: package com.justforum.yotamarker.mywifi;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class WifiAdapter extends BaseAdapter {
   Context context;
   List<String> ssid;

   public WifiAdapter(Context context, List<String> ssid) {
   this.context = context;
   this.ssid = ssid;
   }

   @Override
   public int getCount() {
   return ssid.size();
   }

   @Override
   public Object getItem(int position) {
   return null;
   }

   @Override
   public long getItemId(int position) {
   return 0;
   }

   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
   TextView txt = new TextView(context);
   txt.setText(ssid.get(position));
   txt.setTextSize(32);
   return txt;
   }
}

main java :

Code:: package com.justforum.yotamarker.mywifi;

import android.Manifest;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.os.VibrationEffect;
import android.os.Vibrator;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
Button btnWifi;
ListView lstView;
Context context;
final int ACCESS_FINE_LOCATION =1;
final int ACCESS_COARSE_LOCATION =1;
WifiManager wifi; //a manger for all our wifi requests

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setPointer();
}

private void setPointer() {
this.context=this;
this.lstView=findViewById(R.id.lstWifi);
this.btnWifi=findViewById(R.id.btnWifiScan);
getWifiPermission();
btnWifi.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
scanWifi();
}
});
}

private void getWifiPermission() {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {

new AlertDialog.Builder(this)
.setTitle("gps Permission needed to scan available wifi")
.setMessage("This permission is needed because the app needs to be able to scan wifi")
.setPositiveButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, ACCESS_FINE_LOCATION);
}
})
.setNegativeButton("cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.create().show();

} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, ACCESS_FINE_LOCATION);

}

}

private void scanWifi() {
//wifi example -> pointer to system service WIFI
wifi = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled())
{
getWifiList();
}
}

private void getWifiList() {
List<ScanResult> wifiList = wifi.getScanResults();
List<String> foundSSID = new ArrayList<>();
for (ScanResult item:wifiList)
{
foundSSID.add(item.SSID);
}
WifiAdapter myAdapter = new WifiAdapter(context,foundSSID);
lstView.setAdapter(myAdapter);
}

}

4 wifi scan walkthrough look up

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super Posts : 511 Join date : 2011-08-02

android mobile app development grimoire - Page 2 2epf75

add : <service android:name=".MyCustomService"/> to the manifest above application
so it looks like :

Code:: <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.justforum.yotamarker.mycustomservice">

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyCustomService"/>
</application>

</manifest>

main xml :

Code:: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#26ff00"
android:layout_marginTop="20dp"
android:id="@+id/btnStart"
android:text="Start Service"
android:textSize="32sp"/>

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ff2036"
android:layout_marginTop="20dp"
android:id="@+id/btnStop"
android:text="Stop Service"
android:textSize="32sp"/>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_margin="30dp"
android:id="@+id/lnrLoading"
android:visibility="invisible">

<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:text="Loading some data"
android:textSize="64sp"
android:gravity="center"/>
<ProgressBar
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"/>
</LinearLayout>

</LinearLayout>

MyCustomService.java

Code:: package com.justforum.yotamarker.mycustomservice;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.view.View;

public class MyCustomService extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
MainActivity.lnrLoading.setVisibility(View.VISIBLE);
return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {
MainActivity.lnrLoading.setVisibility(View.INVISIBLE);
super.onDestroy();
}
}

main activity java :

Code:: package com.justforum.yotamarker.mycustomservice;

import android.app.ActivityManager;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
private Button btnStart, btnStop;
public static LinearLayout lnrLoading;
Intent myService;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setPointer();
}

private void setPointer() {
myService = new Intent(this,MyCustomService.class);
btnStart=findViewById(R.id.btnStart);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!isMyServiceRunning(MyCustomService.class)) {

startService(myService);
}
}
});

btnStop=findViewById(R.id.btnStop);
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (isMyServiceRunning(MyCustomService.class)) {
stopService(myService);
}
}
});
lnrLoading=findViewById(R.id.lnrLoading);
}

private boolean isMyServiceRunning(Class<?> serviceClass)
{
//create activity manager to get all process that are running in the system
ActivityManager manger = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
//go on entire collection and check if there is a matching name to the serviceClass name
//that we gave in the args.
for (ActivityManager.RunningServiceInfo service:manger.getRunningServices(Integer.MAX_VALUE))
{
//if we found, return true
if (serviceClass.getName().equals(service.service.getClassName()))
{
Log.e("onStop", "onClick: start" );
return true;
}
}
//if we didn't found , return false as a default
return false;
}

}

keynote : notice in main activity the code snippet :

Code:: private boolean isMyServiceRunning(Class<?> serviceClass)
{
//create activity manager to get all process that are running in the system
ActivityManager manger = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
//go on entire collection and check if there is a matching name to the serviceClass name
//that we gave in the args.
for (ActivityManager.RunningServiceInfo service:manger.getRunningServices(Integer.MAX_VALUE))
{
//if we found, return true
if (serviceClass.getName().equals(service.service.getClassName()))
{
Log.e("onStop", "onClick: start" );
return true;
}
}
//if we didn't found , return false as a default
return false;
}

it is useful for other apps using services

_________________
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