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