Java tutorial
//package com.java2s; //License from project: Open Source License import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); float x = (float) w / width; float y = (float) h / height; matrix.postScale(x, y); Bitmap zoomBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); return zoomBitmap; } public static Bitmap zoomBitmap(Bitmap bitmap, float times) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); matrix.postScale(times, times); Bitmap zoomBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); return zoomBitmap; } }