More on onSaveInstanceState() and onRestoreInstanceState()

In the article onSaveInstanceState() and onRestoreInstanceState() described how to save and restore state in onSaveInstanceState() and onRestoreInstanceState() methods. It's another exercise, we can know more of life cycle of a activity about onSaveInstanceState() and onRestoreInstanceState().

package com.exercise.AndroidSaveState;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class AndroidSaveStateActivity extends Activity {
 
 TextView textOnPause;
 TextView textOnResume;
 TextView textOnRestoreInstanceState;
 TextView textOnSaveInstanceState;
 
 int cntOnPause;
 int cntOnResume;
 int cntOnRestoreInstanceState;
 int cntOnSaveInstanceState;
 
   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
      
       textOnPause = (TextView)findViewById(R.id.onPause);
       textOnResume = (TextView)findViewById(R.id.onResume);
    textOnRestoreInstanceState = (TextView)findViewById(R.id.onRestoreInstanceState);
    textOnSaveInstanceState = (TextView)findViewById(R.id.onSaveInstanceState);

   }

 @Override
 protected void onPause() {
  // TODO Auto-generated method stub
  cntOnPause++;
  super.onPause();
 }


 @Override
 protected void onResume() {
  // TODO Auto-generated method stub
  super.onResume();
  
  cntOnResume++;
       textOnPause.setText("cntOnPause: " + String.valueOf(cntOnPause));
       textOnResume.setText("cntOnResume: " + String.valueOf(cntOnResume));
    textOnRestoreInstanceState.setText("cntOnRestoreInstanceState: " + String.valueOf(cntOnRestoreInstanceState));
    textOnSaveInstanceState.setText("cntOnSaveInstanceState: " + String.valueOf(cntOnSaveInstanceState));
 }

 @Override
 protected void onSaveInstanceState(Bundle outState) {
  // TODO Auto-generated method stub
  cntOnSaveInstanceState++;
  outState.putInt("CNT_OnPause", cntOnPause);
  outState.putInt("CNT_OnResume", cntOnResume);
  outState.putInt("CNT_OnRestoreInstanceState", cntOnRestoreInstanceState);
  outState.putInt("CNT_OnSaveInstanceState", cntOnSaveInstanceState);
  
  
  super.onSaveInstanceState(outState);
 }
 
 @Override
 protected void onRestoreInstanceState(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  
  if (savedInstanceState != null){
   if(savedInstanceState.containsKey("CNT_OnPause")){
    cntOnPause = savedInstanceState.getInt("CNT_OnPause");
   }
   
   if(savedInstanceState.containsKey("CNT_OnResume")){
    cntOnResume = savedInstanceState.getInt("CNT_OnResume");
   }
   
   if(savedInstanceState.containsKey("CNT_OnRestoreInstanceState")){
    cntOnRestoreInstanceState = savedInstanceState.getInt("CNT_OnRestoreInstanceState");
   }
   
   if(savedInstanceState.containsKey("CNT_OnSaveInstanceState")){
    cntOnSaveInstanceState = savedInstanceState.getInt("CNT_OnSaveInstanceState");
   }
  }
  cntOnRestoreInstanceState++;
  
  super.onRestoreInstanceState(savedInstanceState);
 }

}

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

   <TextView
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="@string/hello" />
  
   <TextView
       android:id="@+id/onPause"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"/>
   <TextView
       android:id="@+id/onResume"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"/>
   <TextView
       android:id="@+id/onRestoreInstanceState"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"/>
   <TextView
       android:id="@+id/onSaveInstanceState"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"/>
  
</LinearLayout>