Fragmentation without tag in android studio | XML code | JAVA code | Fragment Class

1. //mainxml
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<Button
android:id="@+id/f1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Fragment1" />
<Button
android:id="@+id/f2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Fragment2" />
<FrameLayout
android:id="@+id/framlayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</androidx.appcompat.widget.LinearLayoutCompat>
//mainjava
package com.example.notification;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.NotificationCompat;
import android.app.Fragment;
import android.annotation.SuppressLint;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;

2. import android.view.View;
import android.widget.Button;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.List;
public class MainActivity extends AppCompatActivity {
Button btn1;
Button btn2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn1=(Button)findViewById(R.id.f1);
btn2=(Button)findViewById(R.id.f2);
btn1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
loadfragment(new Fragment1());
}
});
btn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
loadfragment(new Fagmment2());
}
});
}
public void loadfragment(Fragment fragment) {
FragmentManager fm =getFragmentManager();
FragmentTransaction ft=fm.beginTransaction();
ft.replace(R.id.framlayout, fragment);
ft.commit();
}
}
//frgmnt1javaclasss
package com.example.notification;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;

3. import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import android.app.Fragment;
import java.util.zip.Inflater;
public class Fragment1 extends Fragment {
View v;
Button b1;
@Override
public View onCreateView( LayoutInflater inflater, ViewGroup container, Bundle
savedInstanceState) {
v=inflater.inflate(R.layout.f1,container,false);
b1=(Button)v.findViewById(R.id.f1btn);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(getActivity(),"yes this click on 1st
fragment",Toast.LENGTH_LONG).show();
}
});
return v;
}
}
//frgmnt2
package com.example.notification;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import android.app.Fragment;
public class Fagmment2 extends Fragment {
View v;
Button b2;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle
savedInstanceState) {
v=inflater.inflate(R.layout.f2,container,false);
b2=(Button)v.findViewById(R.id.f2btn);
b2.setOnClickListener(new View.OnClickListener() {
@Override

4. public void onClick(View v) {
Toast.makeText(getActivity(),"yes this click on 2nd
fragment",Toast.LENGTH_LONG).show();
}
});
return v;
}
}
//f1layout
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="30sp"
android:layout_marginTop="40sp"
android:text="my 1st" />
<Button
android:id="@+id/f1btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="160sp"
android:layout_marginTop="200sp"
android:text="First Fragment" />
</androidx.appcompat.widget.LinearLayoutCompat>
//f2layout
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"

5. >
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="30sp"
android:layout_marginTop="40sp"
android:text="my 2nd fragment" />
<Button
android:id="@+id/f2btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="160sp"
android:layout_marginTop="200sp"
android:text="2nd fragment" />
</androidx.appcompat.widget.LinearLayoutCompat>