Java tutorial
//package com.java2s; import android.content.Context; import android.graphics.Bitmap; public class Main { public static Bitmap scaleBitmap(Bitmap photo, int newHeight, Context context) { final float densityMultiplier = context.getResources().getDisplayMetrics().density; int h = (int) (newHeight * densityMultiplier); int w = (int) (h * photo.getWidth() / ((double) photo.getHeight())); photo = Bitmap.createScaledBitmap(photo, w, h, true); return photo; } }