Code:
public static Bitmap scaleDown(Bitmap realImage, float maxImageSize,
boolean filter) {
float ratio = Math.min(
(float) maxImageSize / realImage.getWidth(),
(float) maxImageSize / realImage.getHeight());
int width = Math.round((float) ratio * realImage.getWidth());
int height = Math.round((float) ratio * realImage.getHeight());
Bitmap newBitmap = Bitmap.createScaledBitmap(realImage, width,
height, filter);
return newBitmap;
}
***********************************************
Bitmap yourBitmap;
Bitmap resized = Bitmap.createScaledBitmap(yourBitmap, newWidth, newHeight, true);
*************************************************
public static Bitmap scaleBitmap(Bitmap bitmap, int wantedWidth, int wantedHeight) {
Bitmap output = Bitmap.createBitmap(wantedWidth, wantedHeight, Config.ARGB_8888);
Canvas canvas = new Canvas(output);
Matrix m = new Matrix();
m.setScale((float) wantedWidth / bitmap.getWidth(), (float) wantedHeight / bitmap.getHeight());
canvas.drawBitmap(bitmap, m, new Paint());
return output;
}
****************************************
public static Bitmap scaleBitmap(Bitmap bitmap, int wantedWidth, int wantedHeight) {
Bitmap output = Bitmap.createBitmap(wantedWidth, wantedHeight, Config.ARGB_8888);
Canvas canvas = new Canvas(output);
Matrix m = new Matrix();
m.setScale((float) wantedWidth / bitmap.getWidth(), (float) wantedHeight / bitmap.getHeight());
canvas.drawBitmap(bitmap, m, new Paint());
return output;
}
**************************
public static Bitmap scaleDown(Bitmap realImage, float maxImageSize,
boolean filter) {
float ratio = Math.min(
(float) maxImageSize / realImage.getWidth(),
(float) maxImageSize / realImage.getHeight());
int width = Math.round((float) ratio * realImage.getWidth());
int height = Math.round((float) ratio * realImage.getHeight());
Bitmap newBitmap = Bitmap.createScaledBitmap(realImage, width,
height, filter);
return newBitmap;
}
*****************************
public static Bitmap ScaleDownBitmap(Bitmap originalImage, float maxImageSize, bool filter)
{
float ratio = Math.Min((float)maxImageSize / originalImage.Width, (float)maxImageSize / originalImage.Height);
int width = (int)Math.Round(ratio * (float)originalImage.Width);
int height =(int) Math.Round(ratio * (float)originalImage.Height);
Bitmap newBitmap = Bitmap.CreateScaledBitmap(originalImage, width, height, filter);
return newBitmap;
}
public static Bitmap ScaleBitmap(Bitmap originalImage, int wantedWidth, int wantedHeight)
{
Bitmap output = Bitmap.CreateBitmap(wantedWidth, wantedHeight, Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(output);
Matrix m = new Matrix();
m.SetScale((float)wantedWidth / originalImage.Width, (float)wantedHeight / originalImage.Height);
canvas.DrawBitmap(originalImage, m, new Paint());
return output;
}
}
*************************
private Bitmap scale(Bitmap bitmap, int maxWidth, int maxHeight) {
// Determine the constrained dimension, which determines both dimensions.
int width;
int height;
float widthRatio = (float)bitmap.getWidth() / maxWidth;
float heightRatio = (float)bitmap.getHeight() / maxHeight;
// Width constrained.
if (widthRatio >= heightRatio) {
width = maxWidth;
height = (int)(((float)width / bitmap.getWidth()) * bitmap.getHeight());
}
// Height constrained.
else {
height = maxHeight;
width = (int)(((float)height / bitmap.getHeight()) * bitmap.getWidth());
}
Bitmap scaledBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
float ratioX = (float)width / bitmap.getWidth();
float ratioY = (float)height / bitmap.getHeight();
float middleX = width / 2.0f;
float middleY = height / 2.0f;
Matrix scaleMatrix = new Matrix();
scaleMatrix.setScale(ratioX, ratioY, middleX, middleY);
Canvas canvas = new Canvas(scaledBitmap);
canvas.setMatrix(scaleMatrix);
canvas.drawBitmap(bitmap, middleX - bitmap.getWidth() / 2, middleY - bitmap.getHeight() / 2, new Paint(Paint.FILTER_BITMAP_FLAG));
return scaledBitmap;
}java android studio scaling down a bitmap image
