Create application for demonstration of android activity life cycle.

Acivity_main.xml

<RelativeLayout 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"

    tools:context=".MainActivity" >

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:layout_centerVertical="true"

        android:text="@string/hello_world" />

</RelativeLayout>

MainActivity.java

package com.example.act;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.widget.Toast;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Toast.makeText(this,"onCreate", Toast.LENGTH_LONG).show();

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

       present.

        getMenuInflater().inflate(R.menu.activity_main, menu);

        return true;

    }

    protected void onStart() {

        super.onStart();

        Toast.makeText(this,"onStart", Toast.LENGTH_LONG).show();

    }

    protected void onPause() {

        super.onPause();

        Toast.makeText(this,"onPause", Toast.LENGTH_LONG).show();

    }

    protected void onStop() {

        super.onStop();

        Toast.makeText(this,"onStop", Toast.LENGTH_LONG).show();

    }

    protected void onResume() {

        super.onResume();

        Toast.makeText(this,"onResume", Toast.LENGTH_LONG).show();

    }

    protected void onDestroy() {

        super.onDestroy();

        Toast.makeText(this,"onDestroy", Toast.LENGTH_LONG).show();

    }

    protected void onRestart()

{

        super.onRestart();

        Toast.makeText(this,"onRestart", Toast.LENGTH_LONG).show();

    }

}