Java tutorial
//package com.java2s; //License from project: Apache License import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import java.io.ByteArrayOutputStream; public class Main { public static byte[] getBitmapData(Bitmap bmp) { ByteArrayOutputStream bos = new ByteArrayOutputStream(); bmp.compress(CompressFormat.JPEG, 100, bos); byte[] bitmapdata = bos.toByteArray(); return bitmapdata; } }