How to pass a String from one Activity to another in Android?

This example demonstrates about how do I pass a String from one Activity to another 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

Step 2 − Add the following code to res/layout/activity_main.xml.

Step 3 − Add the following code to src/MainActivity.java

package app.com.sample;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
   Button changeActivityButton;
   EditText messageEditText;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      messageEditText = (EditText) findViewById(R.id.etMessage);
      changeActivityButton = (Button) findViewById(R.id.newActbutton);
      changeActivityButton.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this,SecondActivity.class);
            String message = messageEditText.getText().toString();
            intent.putExtra("message_key", message);
            startActivity(intent);
         }
      });
   }
}

Step 4 − Add the following code to res/layout/activity_second.xml.

Step 5 − Add the following code to src/SecondActivity.java

package app.com.sample;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class SecondActivity extends AppCompatActivity {
   TextView messageTextView;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_second);
      String message = getIntent().getStringExtra("message_key");
      messageTextView = (TextView)findViewById(R.id.textView2);
      messageTextView.setText(message);
   }
}

Step 6 − Add the following code to androidManifest.xml

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 −

Click here to download the project code.