How to save / restore fragment state in android

In this android programming source code example, we are going to save / restore fragment state in android.

Below is a step by step source code to save / restore fragment state in android.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ededed">

    <FrameLayout
        android:id="@+id/frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

MainActivity.java

import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;


public class FragmentActivity11 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fragment11);
        FragmentManager mFragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.frame,new Fragment11()).commit();
    }
}

fragment_fragment11.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ededed">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="Save / Restore Fragment State"
        android:gravity="center"
        android:textSize="20sp"/>

</RelativeLayout>

Fragment11.java

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;


public class Fragment11 extends Fragment{
    private String name;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_fragment11, container, false);

        return view;
    }

    @Override
    public void onSaveInstanceState(Bundle state){
        super.onSaveInstanceState(state);
        if(state!=null){
            state.putString("website","Inducesmile");
        }
    }

    @Override
    public void onViewStateRestored(@Nullable Bundle savedInstanceState){
        super.onViewStateRestored(savedInstanceState);
        if(savedInstanceState!=null){
            String website = savedInstanceState.getString("website");
            Toast.makeText(getActivity(),"Fragment Restore State: "+website,Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState){
        super.onActivityCreated(savedInstanceState);
    }

}

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