Study of Activity lifecycle and demonstrating program using it. Mobile Computing and Wireless Communication (170702) GTU

               Code :

               package com.example.activitylifecycle;

               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) {

                       // Inflate the menu; this adds items to the action bar if it is 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 onResume() {

                                super.onResume();

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

                    }

                   

                    protected void onRestart() {

                                super.onRestart();

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

                    }

                   

                    protected void onStop() {

                                super.onStop();

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

                    }

                    protected void onPause() {

                                super.onPause();

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

                    }

                   

                    protected void onDestroy() {

                                super.onDestroy();

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

                    }

               }

               Main_activity.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_alignParentTop="true"

                       android:layout_centerHorizontal="true"

                       android:layout_marginTop="149dp"

                       android:text="@string/hello_world"

                       android:textSize="20sp" />

                

               </RelativeLayout>