Life Cycle of Activity and Application

Life Cycle tutorial covered the all information about the activity and application life cycle .

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Steps to use Life Cycle tutorial in your project.

1. Crate a project(LifeCycleDemo) in android studio.
   
   
2. Create a class MyApplication.Java and update it-
   
   
   
   
   

   package com.pankaj.lifecycledemo;
   
   import android.app.Application;
   import android.content.res.Configuration;
   import android.util.Log;
   
   /**
    * Created by gsolc on 29/11/17.
    */
   
   public class MyApplication extends Application {
       String TAG="lifecycledemoTag";
   
       @Override
       public void onCreate() {
           super.onCreate();
           Log.e(TAG, "MyApplication onCreate");
       }
   
       @Override
       public void onLowMemory() {
           super.onLowMemory();
           Log.e(TAG, "MyApplication onLowMemory");
   
       }
   
       @Override
       public void onTerminate() {
           super.onTerminate();
           Log.e(TAG, "MyApplication onTerminate");
   
       }
   
       @Override
       public void onTrimMemory(int level) {
           super.onTrimMemory(level);
           Log.e(TAG, "MyApplication onTrimMemory");
   
       }
   
       @Override
       public void onConfigurationChanged(Configuration newConfig) {
           super.onConfigurationChanged(newConfig);
           Log.e(TAG, "onConfigurationChanged");
       }
   
   }
   
   

     
3. Create a class MainActivity.Java and update it-
   
   
   
   
   

   package com.pankaj.lifecycledemo;
   
   import android.support.v7.app.AppCompatActivity;
   import android.os.Bundle;
   import android.util.Log;
   
   public class MainActivity extends AppCompatActivity {
       String TAG="lifecycledemoTag";
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
           Log.e(TAG, "MainActivity onCreate");
       }
   
       @Override
       protected void onDestroy() {
           super.onDestroy();
           Log.e(TAG, "MainActivity onDestroy");
       }
   
       @Override
       public void onBackPressed() {
           super.onBackPressed();
           Log.e(TAG, "MainActivity onBackPressed");
       }
   
       @Override
       protected void onPause() {
           super.onPause();
           Log.e(TAG, "MainActivity onPause");
       }
   
       @Override
       protected void onResume() {
           super.onResume();
           Log.e(TAG, "MainActivity onResume");
       }
   
       @Override
       protected void onStart() {
           super.onStart();
           Log.e(TAG, "MainActivity onStart");
       }
   
       @Override
       protected void onRestart() {
           super.onRestart();
           Log.e(TAG, "MainActivity onRestart");
       }
   }
   

    
4. Open your main_activity.xml file and update it-

5. <?xml version="1.0" encoding="utf-8"?>
   <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto"
       xmlns:tools="http://schemas.android.com/tools"
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       tools:context="com.pankaj.lifecycledemo.MainActivity">
   
       <TextView
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="Hello World!"
           app:layout_constraintBottom_toBottomOf="parent"
           app:layout_constraintLeft_toLeftOf="parent"
           app:layout_constraintRight_toRightOf="parent"
           app:layout_constraintTop_toTopOf="parent" />
   
   </android.support.constraint.ConstraintLayout>

6. All the application development process with Life Cycle  has completed, Now run the app and look the screen. 
   
   

   
   

   

   
   

   
   

   
   

   
   

   
   
7. Good bye, Thanks to read this blog.
   
   

   
   

   
   

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