Java tutorial
//package com.java2s; import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap zoomBitmap(Bitmap src, float scaleX, float scaleY) { Matrix matrix = new Matrix(); matrix.setScale(scaleX, scaleY); Bitmap t_bitmap = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true); return t_bitmap; } public static Bitmap zoomBitmap(Bitmap src, int width, int height) { return Bitmap.createScaledBitmap(src, width, height, true); } }