Android Convert Image to Base64 String or Base64 String to ...

Android Convert Image to Base64 String or Base64 String to

Image

Create new android studio project

Add an image in res/drawable folder. This is the image that we will convert. See below

screenshot we have added an image with name logo.png.

Now add following code in respectively files.

acitivity_main.xml

MainActivity.java

package com.base64example;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Base64;

import android.widget.ImageView;

import java.io.ByteArrayOutputStream;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ImageView image =(ImageView)findViewById(R.id.image);

//encode image to base64 string

ByteArrayOutputStream baos = new ByteArrayOutputStream();

Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo);

press(pressFormat.JPEG, 100, baos);

byte[] imageBytes = baos.toByteArray();

String imageString = Base64.encodeToString(imageBytes, Base64.DEFAULT);

System.out.println("Start file base64");

System.out.println(imageString);

//decode base64 string to image

imageBytes = Base64.decode(imageString, Base64.DEFAULT);

Bitmap decodedImage = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);

image.setImageBitmap(decodedImage); }}

Run the project.

We are converting the image to base64 string and then converting back to bitmap and

finally showing it in ImageView.

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