Fragment Example in Android

FragmentsActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             xmlns:tools="http://schemas.android.com/tools"
             android:id="@+id/activity_frame_layouta"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:paddingBottom="@dimen/activity_vertical_margin"
             android:paddingLeft="@dimen/activity_horizontal_margin"
             android:paddingRight="@dimen/activity_horizontal_margin"
             android:paddingTop="@dimen/activity_vertical_margin"
             tools:context="com.bhaumik.programmingstudy.FragmentsActivity">

    <ImageView
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:src="@drawable/icon_android"
            android:scaleType="fitCenter"
    />
    <TextView
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:gravity="center"
            android:text="Frame Layout"
            android:textSize="25sp"
            android:textColor="#000000"
    />

</FrameLayout>

FragmentsActivity.java

package com.bhaumik.programmingstudy;

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

public class FragmentsActivity extends AppCompatActivity implements View.OnClickListener{

    Button android,apple,google,microsoft,whatsapp;

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

        FindViewId();

        android.setOnClickListener(this);
        apple.setOnClickListener(this);
        google.setOnClickListener(this);
        microsoft.setOnClickListener(this);
        whatsapp.setOnClickListener(this);
    }
    private void FindViewId() {
        android = (Button) findViewById(R.id.btn_android);
        apple = (Button) findViewById(R.id.btn_apple);
        google = (Button) findViewById(R.id.btn_google);
        microsoft = (Button) findViewById(R.id.btn_microsoft);
        whatsapp = (Button) findViewById(R.id.btn_whatsapp);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId())
        {
            case R.id.btn_android :
                AndroidListener();
                break;
            case R.id.btn_apple :
                AppleListener();
                break;
            case R.id.btn_google :
                GoogleListener();
                break;
            case R.id.btn_microsoft :
                MicrosoftListener();
                break;
            case R.id.btn_whatsapp :
                WhatsappListener();
                break;
        }
    }
    private void AndroidListener() {
        TestFragment tf = new TestFragment();
        Bundle bundle = new Bundle();
        bundle.putString("test","android");
        tf.setArguments(bundle);

        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,tf,"tags").commit();

    }

    private void AppleListener() {
        TestFragment tf = new TestFragment();
        Bundle bundle = new Bundle();
        bundle.putString("test","apple");
        tf.setArguments(bundle);

        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,tf,"tags").commit();

    }

    private void GoogleListener() {
        TestFragment tf = new TestFragment();
        Bundle bundle = new Bundle();
        bundle.putString("test","google");
        tf.setArguments(bundle);

        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,tf,"tags").commit();
    }

    private void MicrosoftListener() {
        TestFragment tf = new TestFragment();
        Bundle bundle = new Bundle();
        bundle.putString("test","microsoft");
        tf.setArguments(bundle);

        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,tf,"tags").commit();
    }

    private void WhatsappListener() {
        TestFragment tf = new TestFragment();
        Bundle bundle = new Bundle();
        bundle.putString("test","whatsapp");
        tf.setArguments(bundle);
        getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,tf,"tags").commit();
    }
}