Java tutorial
//package com.java2s; //License from project: Apache License import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap zoomBitmap(Bitmap bitmap, int desWidth, int desHeight) { return zoomBitmap(bitmap, (float) desWidth / bitmap.getWidth(), (float) desHeight / bitmap.getHeight()); } public static Bitmap zoomBitmap(Bitmap bitmap, float sx, float sy) { Matrix matrix = new Matrix(); matrix.postScale(sx, sy); return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); } }