Java tutorial
//package com.java2s; import java.io.ByteArrayOutputStream; import android.graphics.Bitmap; import android.util.Base64; public class Main { /** * This method converts bitmap to base64 string. * * @param bitmap * @return base64EncodedImage */ public static String encodeTobase64(Bitmap bitmap) { // TODO Auto-generated method stub ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); byte[] b = baos.toByteArray(); return Base64.encodeToString(b, Base64.DEFAULT); } }