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I am using the following code, but it's not working.
String source = "password";
byte[] byteArray = source.getBytes("UTF-16");
Base64 bs = new Base64();
//bs.encodeBytes(byteArray);
System.out.println(bs.encodeBytes(byteArray));
//bs.decode(bs.encodeBytes(byteArray));
System.out.println(bs.decode(bs.encodeBytes(byteArray)));
–
Choose an encoding. UTF-8 is generally a good choice; stick to an encoding which will definitely be valid on both sides. It would be rare to use something other than UTF-8 or UTF-16.
Transmitting end:
Encode the string to bytes (e.g. text.getBytes(encodingName))
Encode the bytes to base64 using the Base64 class
Transmit the base64
Receiving end:
Receive the base64
Decode the base64 to bytes using the Base64 class
Decode the bytes to a string (e.g. new String(bytes, encodingName))
So something like:
// Sending side
byte[] data = text.getBytes("UTF-8");
String base64 = Base64.encodeToString(data, Base64.DEFAULT);
// Receiving side
byte[] data = Base64.decode(base64, Base64.DEFAULT);
String text = new String(data, "UTF-8");
Or with StandardCharsets:
// Sending side
byte[] data = text.getBytes(StandardCharsets.UTF_8);
String base64 = Base64.encodeToString(data, Base64.DEFAULT);
// Receiving side
byte[] data = Base64.decode(base64, Base64.DEFAULT);
String text = new String(data, StandardCharsets.UTF_8);
–
–
–
fun String.decode(): String {
return Base64.decode(this, Base64.DEFAULT).toString(charset("UTF-8"))
fun String.encode(): String {
return Base64.encodeToString(this.toByteArray(charset("UTF-8")), Base64.DEFAULT)
Example:
Log.d("LOGIN", "TEST")
Log.d("LOGIN", "TEST".encode())
Log.d("LOGIN", "TEST".encode().decode())
–
–
–
–
To anyone else who ended up here while searching for info on how to decode a string encoded with Base64.encodeBytes(), here was my solution:
// encode
String ps = "techPass";
String tmp = Base64.encodeBytes(ps.getBytes());
// decode
String ps2 = "dGVjaFBhC3M=";
byte[] tmp2 = Base64.decode(ps2);
String val2 = new String(tmp2, "UTF-8");
Also, I'm supporting older versions of Android so I'm using Robert Harder's Base64 library from http://iharder.net/base64
val password = "Here Your String"
val data = password.toByteArray(charset("UTF-8"))
val base64 = Base64.encodeToString(data, Base64.DEFAULT)
For Decode
val datasd = Base64.decode(base64, Base64.DEFAULT)
val text = String(datasd, charset("UTF-8"))
try {
byteArray = source.getBytes("UTF-16");
System.out.println(new String(Base64.decode(Base64.encode(byteArray,
Base64.DEFAULT), Base64.DEFAULT)));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
–
To encrypt:
byte[] encrpt= text.getBytes("UTF-8");
String base64 = Base64.encodeToString(encrpt, Base64.DEFAULT);
To decrypt:
byte[] decrypt= Base64.decode(base64, Base64.DEFAULT);
String text = new String(decrypt, "UTF-8");
Above many answers that don't work for me, and some of them are no exception handling in the correct way. here am adding a perfect solution that works amazing for me sure also for you too.
//base64 decode string
String s = "ewoic2VydmVyIjoic2cuenhjLmx1IiwKInNuaSI6InRlc3RpbmciLAoidXNlcm5hbWUiOiJ0ZXN0
ZXIiLAoicGFzc3dvcmQiOiJ0ZXN0ZXIiLAoicG9ydCI6IjQ0MyIKfQ==";
String val = a(s) ;
Toast.makeText(this, ""+val, Toast.LENGTH_SHORT).show();
public static String a(String str) {
try {
return new String(Base64.decode(str, 0), "UTF-8");
} catch (UnsupportedEncodingException | IllegalArgumentException unused) {
return "This is not a base64 data";
Based on the previous answers I'm using the following utility methods in case anyone would like to use it.
* @param message the message to be encoded
* @return the enooded from of the message
public static String toBase64(String message) {
byte[] data;
try {
data = message.getBytes("UTF-8");
String base64Sms = Base64.encodeToString(data, Base64.DEFAULT);
return base64Sms;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
* @param message the encoded message
* @return the decoded message
public static String fromBase64(String message) {
byte[] data = Base64.decode(message, Base64.DEFAULT);
try {
return new String(data, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
'java.util.Base64' class provides functionality to encode and decode the information in Base64 format.
How to get Base64 Encoder?
Encoder encoder = Base64.getEncoder();
How to get Base64 Decoder?
Decoder decoder = Base64.getDecoder();
How to encode the data?
Encoder encoder = Base64.getEncoder();
String originalData = "java";
byte[] encodedBytes = encoder.encode(originalData.getBytes());
How to decode the data?
Decoder decoder = Base64.getDecoder();
byte[] decodedBytes = decoder.decode(encodedBytes);
String decodedStr = new String(decodedBytes);
You can get more details at this link.
–
val data: String = "Hello"
val dataByteArray: ByteArray = data.toByteArray()
val dataInBase64: String = Base64Utils.encode(dataByteArray)
Decode :
val dataInBase64: String = "..."
val dataByteArray: ByteArray = Base64Utils.decode(dataInBase64)
val data: String = dataByteArray.toString()
–
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class BaseActivity extends AppCompatActivity {
EditText editText;
TextView textView;
TextView textView2;
TextView textView3;
TextView textView4;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_base);
editText=(EditText)findViewById(R.id.edt);
textView=(TextView) findViewById(R.id.tv1);
textView2=(TextView) findViewById(R.id.tv2);
textView3=(TextView) findViewById(R.id.tv3);
textView4=(TextView) findViewById(R.id.tv4);
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
textView2.setText(Base64.encodeToString(editText.getText().toString().getBytes(),Base64.DEFAULT));
textView3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
textView4.setText(new String(Base64.decode(textView2.getText().toString(),Base64.DEFAULT)));
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent"
tools:context=".BaseActivity">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/edt"
android:paddingTop="30dp"
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv1"
android:text="Encode"
android:textSize="20dp"
android:padding="20dp"
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv2"
android:textSize="20dp"
android:padding="20dp"
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv3"
android:text="decode"
android:textSize="20dp"
android:padding="20dp"
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv4"
android:textSize="20dp"
android:padding="20dp"
</LinearLayout>
–
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