Java tutorial
//package com.java2s; import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap zoom(Bitmap source, float width, float height) { Matrix matrix = new Matrix(); float scaleX = width / source.getWidth(); float scaleY = height / source.getHeight(); matrix.postScale(scaleX, scaleY); Bitmap bitmap = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); return bitmap; } }