activityMain.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"
tools:context=".MainActivity">
<ScrollView
android:id="@+id/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="120dp"
android:text="Button Example"
android:textAlignment="center"
android:textSize="40dp"
android:textStyle="bold"
android:paddingTop="15dp"
android:textColor="#FFEB3B"
android:background="#2196F3"
android:gravity="center_horizontal"
android:layout_marginBottom="15dp"/>
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 1"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 2"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button3"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 3"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button4"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 4"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button5"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 5"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button6"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 6"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button7"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 7"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button8"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 8"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button9"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 9"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button10"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 10"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
<Button
android:id="@+id/button11"
android:layout_width="match_parent"
android:layout_height="90dp"
android:text="Button 11"
android:textSize="25dp"
android:textStyle="bold"
android:textColor="@color/white"
android:textAllCaps="false"/>
</LinearLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
ActivityMain.Java
package com.app.androidpro.myapp;
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 {
private Button button1, button2, button3,button4,button5,button6,
button7, button8, button9, button10, button11;
private Intent intent , intent1,intent2,intent3,intent4,intent5,intent6,intent7,intent8,
intent9,intent10;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 =findViewById(R.id.button1);
button2 =findViewById(R.id.button2);
button3 =findViewById(R.id.button3);
button4 =findViewById(R.id.button4);
button5 =findViewById(R.id.button5);
button6 =findViewById(R.id.button6);
button7 =findViewById(R.id.button7);
button8 =findViewById(R.id.button9);
button9 =findViewById(R.id.button9);
button10 =findViewById(R.id.button10);
button11 =findViewById(R.id.button11);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,MainActivity2.class);
startActivity(intent);
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent1 = new Intent(MainActivity.this,MainActivity3.class);
startActivity(intent1);
}
});
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent2 = new Intent(MainActivity.this,MainActivity4.class);
startActivity(intent2);
}
});
button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent3 = new Intent(MainActivity.this,MainActivity5.class);
startActivity(intent3);
}
});
button5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent4 = new Intent(MainActivity.this,MainActivity6.class);
startActivity(intent4);
}
});
button6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent5 = new Intent(MainActivity.this,MainActivity7.class);
startActivity(intent5);
}
});
button7.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent6 = new Intent(MainActivity.this,MainActivity8.class);
startActivity(intent6);
}
});
button8.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent7 = new Intent(MainActivity.this,MainActivity9.class);
startActivity(intent7);
}
});
button9.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent8 = new Intent(MainActivity.this,MainActivity10.class);
startActivity(intent8);
}
});
button10.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent9 = new Intent(MainActivity.this,MainActivity11.class);
startActivity(intent9);
}
});
button11.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent10 = new Intent(MainActivity.this,MainActivity12.class);
startActivity(intent10);
}
});
}
}