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) { Bitmap newbmp = null; if (bitmap != null) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); float scaleWidht = ((float) w / width); float scaleHeight = ((float) h / height); matrix.postScale(scaleWidht, scaleHeight); try { newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true); } catch (Exception e) { newbmp = bitmap; } } return newbmp; } }