Android_Slip_1A

Step1:

Open Android Studio and create a new project with an Empty Activity template.

In the res/layout/activity_main.xml file, add a Button widget:

<Button
android:id="@+id/buttonSendMessage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Send Message"
android:onClick="sendMessage"/>

In the MainActivity.java file, implement the sendMessage method:

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

public void sendMessage(View view) {
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("message", "Hello");
startActivity(intent);
}
}

Step2:

Create a new activity by right-clicking on the app folder in the Project Explorer, then selecting New -> Activity -> Empty Activity. Name it SecondActivity.

In the SecondActivity.java file, retrieve the message from the Intent and display it:

import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class SecondActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);

Intent intent = getIntent();
String message = intent.getStringExtra("message");

TextView textView = findViewById(R.id.textViewMessage);
textView.setText(message);
}
}

In the res/layout/activity_second.xml file, add a TextView to display the message:

<TextView
android:id="@+id/textViewMessage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Message will appear here"/>