Java tutorial
//package com.java2s; //License from project: Apache License import android.graphics.Bitmap; import android.util.Base64; import java.io.ByteArrayOutputStream; public class Main { public static String encodeToBase64(Bitmap image) { ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); image.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream); byte[] bytes = byteArrayOutputStream.toByteArray(); return Base64.encodeToString(bytes, Base64.DEFAULT); } }