Java tutorial
//package com.java2s; import android.graphics.Bitmap; import android.graphics.Matrix; public class Main { public static Bitmap resize(Bitmap bmp, int width, int height) { float sx = (width * 1.0f) / bmp.getWidth(); float sy = (height * 1.0f) / bmp.getHeight(); Matrix matrix = new Matrix(); matrix.postScale(sx, sy); return Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true); } }