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