Java tutorial
//package com.java2s; import android.graphics.BitmapFactory; public class Main { public static int getNbPixels(String imagePath) { BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; //Returns null, sizes are in the options variable BitmapFactory.decodeFile(imagePath, options); int width = options.outWidth; int height = options.outHeight; return width * height; } }