Fragment01

MainActivity.java
==========================
package com.example.zeevm.myfragor;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //we don't need to set view, our fragment will handle it
        //setContentView(R.layout.activity_main);

        //Create instance of Fragment manager to handle our fragments
        FragmentManager fm = getFragmentManager();
        //create instance of Fragment transaction to handle fragment replace and animation
        FragmentTransaction ft = fm.beginTransaction();

        int displayMode = getResources().getConfiguration().orientation;

        if (displayMode==1)
        {
            //create instance of first fragment
            Fragment1 f1 = new Fragment1();
            //change content of the screen to our new fragment
            ft.replace(android.R.id.content,f1);
        }
        else
        {
            //create instance of second fragment
            Fragment2 f2 = new Fragment2();
            //change content of the screen to our new fragment
            ft.replace(android.R.id.content,f2);
        }
        //choose animation
        ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
        //commit all changes to screen fragments
        ft.commit();
    }
}


Fragment1.java
=====================
package com.example.zeevm.myfragor;

import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Created by zeevm on 31/10/2016.
 */

public class Fragment1 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        //return my view as inflated view to the fragment
        return inflater.inflate(R.layout.activity_main,container,false);
    }
}


Fragment2.java
=====================
package com.example.zeevm.myfragor;

import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Created by zeevm on 31/10/2016.
 */

public class Fragment2 extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.layout_horzintal,container,false);
    }
}


activity_main.xml
==================
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="I Am vertical Fragment"
        android:gravity="center"
        android:textSize="32sp"
        android:id="@+id/txtFv"/>

</LinearLayout>


layout_horzintal.xml
========================
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="I am Horzintal Layout"
        android:gravity="center"
        android:background="#ff9e5e"
        android:textSize="32sp"
        android:id="@+id/txtHr"/>

</LinearLayout>