android---adding fragments dynamically

<?xml version= "1.0" encoding= "Utf-8"?>
<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"
    android:orientation= "vertical" android:layout_width= "match_parent"
    android:layout_height= "Match_parent"
    android:background= "#ffff00" >

    <textview
        Android:id= "@+id/text_view"
        Android:layout_width= "Wrap_content"
        android:layout_height= "Wrap_content"
        Android:text= "This is another fragment"
        Android:textsize= "30SP"
        android:layout_gravity= "Center"/>



</LinearLayout>

Package com.example.fragmenttest;

Import android.app.Fragment;
Import Android.os.Bundle;
Import Android.view.LayoutInflater;
Import Android.view.View;
Import Android.view.ViewGroup;

/**
* Created by Administrator on 2016/3/2.
*/
public class Anotherrightfragment extends Fragment {

    @Override
    Public View Oncreateview (layoutinflater inflater, ViewGroup container, Bundle savedinstancestate) {
        View view = Inflater.inflate (R.layout.another_right_fragment,container,false);
        return view;
    }
}

<?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" >

<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:layout_width= "0DP"
android:layout_height= "Match_parent"
android:layout_weight= "1"
Android:id= "@+id/right_layout" >

<fragment
Android:id= "@+id/right_fragment"
Android:layout_width= "Match_parent"
android:layout_height= "Match_parent"
Android:name= "Com.example.fragmenttest.RightFragment"/>

</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.View;
Import Android.widget.Button;

public class Mainactivity extends Activity implements view.onclicklistener{

@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_main);

Button btn = (button) Findviewbyid (R.id.button1);
Btn.setonclicklistener (this);
}


@Override
public void OnClick (View v) {
Switch (V.getid ()) {
Case R.id.button1:
Anotherrightfragment fragment = new Anotherrightfragment ();
Fragmentmanager Fragmentmanager = Getfragmentmanager ();
Fragmenttransaction transaction = Fragmentmanager.begintransaction ();
Transaction.replace (r.id.right_layout,fragment);
Analog Back Stack
Transaction.addtobackstack (NULL);
Transaction.commit ();
Break
Default
Break
}

}
}

android---adding fragments dynamically