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How to encode the string in android?
This example demonstrate about How to encode the string in android.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:gravity="center_horizontal" android:layout_marginTop="30dp" tools:context=".MainActivity"> <EditText android:id="@+id/edit_query" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:id="@+id/buttonPanel" android:text="Check" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
In the above code, we have taken editext, button and textview. When user click on button after inserting value in edittext,it will do encode.
Step 3 − Add the following code to src/MainActivity.java
package com.example.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Base64;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
TextView text;
EditText edit_query;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edit_query = findViewById(R.id.edit_query);
text = findViewById(R.id.text);
findViewById(R.id.buttonPanel).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!edit_query.getText().toString().isEmpty()) {
String encode = Base64.encodeToString(edit_query.getText().toString().getBytes(), Base64.DEFAULT);
text.setText(encode);
}
}
});
}
}Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run 
icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –
In the above result, we have encoded and appened to textview.
Click here to download the project code
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