Open New Activity from Android Button Click - Android Code CC

Android App Development In this video We Teach you how to Open a new Activity (window) by pressing a button in your Android Aplication

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:padding="20dp"
    tools:context=".MainActivity">


    <Button
        android:id="@+id/button"
        android:layout_width="276dp"
        android:layout_height="100dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:text="Button 1 "
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button1"
        android:layout_width="276dp"
        android:layout_height="100dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="8dp"
        android:text="Button 3 "
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="276dp"
        android:layout_height="100dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:text="Button 2"
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:layout_editor_absoluteY="278dp" />
</android.support.constraint.ConstraintLayout>

MainActivity .java

package com.example.open_new_activity;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

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



        Button ButtonActivity = (Button) findViewById(R.id.button);
        ButtonActivity.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent MainActivityintent = new Intent(MainActivity.this, Button1Activity.class);
                startActivity(MainActivityintent);
            }
        });

        Button Button1Activity  = (Button) findViewById(R.id.button1);
      Button1Activity .setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent MainActivityintent = new Intent(MainActivity.this, Button3Activity.class);
                startActivity(MainActivityintent);
            }
        });


        Button Button2Activity  = (Button) findViewById(R.id.button2);
      Button2Activity .setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent MainActivityintent = new Intent(MainActivity.this, Button3Activity.class);
                startActivity(MainActivityintent);
            }
        });


    }


}