PROGRAM 05 : AIM: - To understand Activity , Intent

 Code:-

XML Code:

 

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout 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:background="@drawable/prog3"

    tools:context=".MainActivity">





    <Button

        android:id="@+id/button"

        android:layout_width="135dp"

        android:layout_height="77dp"

        android:text="Button"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        app:layout_constraintVertical_bias="0.354" />





</androidx.constraintlayout.widget.ConstraintLayout>

 

activity_login.xml

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout 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:background="@drawable/dd"

    tools:context=".LoginActivity">





    <Button

        android:id="@+id/button2"

        android:layout_width="176dp"

        android:layout_height="57dp"

        android:text="Button"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

 

JavaCode :

Main Activity :

package com.example.mansamcapro5;



import androidx.appcompat.app.AppCompatActivity;



import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;



public class MainActivity extends AppCompatActivity {

    Button btlogin;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        btlogin = (Button) findViewById(R.id.button);



        btlogin.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {



                Intent intent = new Intent(getApplicationContext(),LoginActivity.class);

                startActivity(intent);



            }

        });





    }



}

Login Activity:

 

package com.example.mansamcapro5;



import androidx.appcompat.app.AppCompatActivity;



import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;



public class LoginActivity extends AppCompatActivity {

    Button btnlog;





    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_login);



        btnlog = (Button) findViewById(R.id.button2);



        btnlog.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {



                Intent intent = new Intent(getApplicationContext(),MainActivity.class);



                startActivity(intent);



            }

        });



    }

}

Output: