Java tutorial
//package com.java2s; //License from project: Open Source License import android.graphics.Bitmap; import java.nio.ByteBuffer; public class Main { public static byte[] getBytes(Bitmap bitmap) { int byteCount = bitmap.getByteCount(); ByteBuffer buffer = ByteBuffer.allocate(byteCount); bitmap.copyPixelsToBuffer(buffer); buffer.rewind(); byte[] data = new byte[byteCount]; buffer.get(data); return data; } }