Java tutorial
//package com.java2s; import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap zoomBMP(Bitmap bitmap, int height, int width) { int w = bitmap.getWidth(); int h = bitmap.getHeight() - 1; Matrix matrix = new Matrix(); float scaleHeight = ((float) height / h); matrix.postScale(scaleHeight, scaleHeight); return Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true); } }