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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="#ffff00"

    android:orientation="vertical" >

   

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center_horizontal"

        android:textSize="20sp"

        android:text="This is another right franment"

        />

?

</LinearLayout>

?

<LinearLayout 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" >

?

  <fragment

      android:id="@+id/left_fragment"

      android:name="com.example.fragmenttest.LeftFragment"

      android:layout_width="0dp"

      android:layout_height="match_parent"

      android:layout_weight="1" />

 

  <FrameLayout

      android:id="@+id/right_layout"

      android:layout_width="0dp"

      android:layout_height="match_parent"

      android:layout_weight="1" >

     

    <fragment

        android:id="@+id/right_fragment"

        android:name="com.example.fragmenttest.RightFragment"

        android:layout_width="match_parent"

        android:layout_height="match_parent" />

 

  </FrameLayout>

 

</LinearLayout>

?

package com.example.fragmenttest;

?

import android.app.Activity;

import android.app.FragmentManager;

import android.app.FragmentTransaction;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

?

public class MainActivity extends Activity implements OnClickListener{

?

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

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

    button.setOnClickListener(this);

  }

?

  @Override

  public void onClick(View v) {

    switch(v.getId()) {

    case R.id.button:

      AnotherRightFragment fragment = new AnotherRightFragment();

      FragmentManager fragmentManager = getFragmentManager();

      FragmentTransaction transaction = fragmentManager.beginTransaction();

      transaction.replace(R.id.right_layout,fragment);

      transaction.commit();

      break;

    default:

      break;

    }

  }

}