Java tutorial
//package com.java2s; //License from project: Open Source License import android.graphics.Bitmap; import android.util.Base64; import java.io.ByteArrayOutputStream; public class Main { public static String encodeImageBase64(Bitmap bitmap) { ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream); return Base64.encodeToString(outputStream.toByteArray(), Base64.DEFAULT); } }