Android Program : Create a Simple Application Which Send ―Hello‖ message from one activity to another with help of Button (Use Intent).

 A) Create a Simple Application Which Send ―Hello‖ message from one activity to  another with help of Button (Use Intent).

Soln :

activity_main.xml

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/textBox" android:hint="Enter Your Message"/> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/passButton" android:text="Pass"/> </LinearLayout>

activity_main2.xml

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

<?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:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity2"> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:text="" android:id="@+id/text"/> </LinearLayout>

MainActivity.java

package com.example.slipap1;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
    EditText textBox;
    Button passButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textBox = (EditText)findViewById(R.id.textBox);
        passButton = (Button)findViewById(R.id.passButton);

        passButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String str = textBox.getText().toString();

                Intent intent = new Intent(getApplicationContext(), MainActivity2.class);
                intent.putExtra("message", str);

                startActivity(intent);
            }
        });
    }
}

MainActivity2.java

package com.example.slipap1;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity2 extends AppCompatActivity {
    TextView text;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        text = (TextView)findViewById(R.id.text);

        Intent intent = getIntent();
        String str = intent.getStringExtra("message");
        text.setText(str);
    }
}

ScreenShot

Screen 1

a message is passed from first activity to second when a button is pressed.

Screen 2