Unit - 07 Understanding Mobile Networking Fundamentals

Lesson Plan: Unit - 07
Subject: P15A2AAD - Android Application Development
Topic of Study: Understanding Mobile Networking Fundamentals
Grade/Level: Master of Computer Applications
Objective: Understanding Mobile Networking Fundamentals
Time Allotment: 55 Minutes

• Understanding Mobile Networking Fundamentals
• Why Application need network…
• Deliver fresh and updated content
• To enable social network features
• To offload heavy processing
• To enable data storage beyond on the device
• To work with java networking by java.net package.
• To developed network based application – you must take care.

• Required Permissions:
• To perform network operations in Android, your application must include certain permissions. 
• Open manifests/AndroidManifest.xml, and add the following permissions before the application tag:
• The ACCESS_NETWORK_STATE permission is required for your application to check the network state of the device, while the INTERNET permission is required for your application to access the Internet.
• How to check internet connection in android?
• Step 01: Manifest file

   package = "com.example.andy.myapplication">

   

   

      android:allowBackup = "true"

      android:icon = "@mipmap/ic_launcher"

      android:label = "@string/app_name"

      android:roundIcon = "@mipmap/ic_launcher_round"

      android:supportsRtl = "true"

      android:theme = "@style/AppTheme">

     

         

           

           

         

     

   

• Step 02: MainActivity.java

import android.content.BroadcastReceiver;

import android.content.IntentFilter;

import android.net.ConnectivityManager;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

   private BroadcastReceiver MyReceiver = null;

   @Override

   protected void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);

      setContentView(R.layout.activity_main);

      MyReceiver = new MyReceiver();

      TextView click=findViewById(R.id.click);

      click.setOnClickListener(new View.OnClickListener() {

         @Override

         public void onClick(View v) {

            broadcastIntent();

         }

      });

   }

   public void broadcastIntent() {

      registerReceiver(MyReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));

   }

   @Override

   protected void onPause() {

      super.onPause();

      unregisterReceiver(MyReceiver);

   }

}

• Step 03:Create a NetworkUtil.java

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

class NetworkUtil {

   public static String getConnectivityStatusString(Context context) {

      String status = null;

      ConnectivityManager cm = (ConnectivityManager)           context.getSystemService(Context.CONNECTIVITY_SERVICE);

     NetworkInfo activeNetwork = cm.getActiveNetworkInfo();

      if (activeNetwork != null) {

         if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {

            status = "Wifi enabled";

            return status;

         } else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {

            status = "Mobile data enabled";

            return status;

         }

      } else {

    status = "No internet is available";

      return status;

    }

    return status;

   }

}

• Step 04:Create a broadcast receiver class and named as MyReceiver.java

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.widget.Toast;

public class MyReceiver extends BroadcastReceiver {

   @Override

   public void onReceive(Context context, Intent intent) {

      String status = NetworkUtil.getConnectivityStatusString(context);

      if(status.isEmpty()) {

         status="No Internet Connection";

      }

      Toast.makeText(context, status, Toast.LENGTH_LONG).show();

   }

}

• Step 05: Update your broadcast receiver in manifest file

   package = "com.example.andy.myapplication">

   

   

      android:allowBackup="true"

      android:icon = "@mipmap/ic_launcher"

      android:label = "@string/app_name"

      android:roundIcon = "@mipmap/ic_launcher_round"

      android:supportsRtl = "true"

      android:theme = "@style/AppTheme">

        

         

         

     

   

     

         

           

           

         

     

   

• Step 06: res/layout/activity_main.xml

   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 = ".MainActivity">

   android:id="@+id/click"

   android:layout_width="wrap_content"

   android:layout_height="wrap_content"

   android:text="Click here"

   app:layout_constraintBottom_toBottomOf="parent"

   app:layout_constraintLeft_toLeftOf="parent"

   app:layout_constraintRight_toRightOf="parent"

   app:layout_constraintTop_toTopOf="parent" />