Showing posts with label Life cycle activity. Show all posts
Showing posts with label Life cycle activity. Show all posts

Sunday, December 03, 2017

Life Cycle of Activity and Application

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






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.