How to Implement a Network Listener in Android: A Step-by-Step Guide

Network Listener in Android

Problem Statement:

Capturing network connectivity changes in Android can be a challenge. Developers may encounter difficulties finding appropriate APIs or examples to implement this functionality.

Solution:

To address this issue, the following comprehensive solution provides step-by-step instructions for creating a network listener in Android:

1. Java Class:

   Create a new Java class named ConnectionChangeReceiver that extends BroadcastReceiver, as shown below:

   <code class="java">public class ConnectionChangeReceiver extends BroadcastReceiver {
       @Override
       public void onReceive(Context context, Intent intent) {
           ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
           NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
           NetworkInfo mobNetInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
           if (activeNetInfo != null) {
               Toast.makeText(context, "Active Network Type : " + activeNetInfo.getTypeName(), Toast.LENGTH_SHORT).show();
           }
           if (mobNetInfo != null) {
               Toast.makeText(context, "Mobile Network Type : " + mobNetInfo.getTypeName(), Toast.LENGTH_SHORT).show();
           }
       }
   }</code>

2. Manifest XML:

   Add permission for accessing the network state in the AndroidManifest.xml under the "manifest" element:

   <code class="xml"><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/></code>

3. Registration:

   Register the broadcast receiver in the AndroidManifest.xml under the "application" element:

   <code class="xml"><receiver android:name="com.blackboard.androidtest.receiver.ConnectionChangeReceiver"
       android:label="NetworkConnection">
       <intent-filter>
           <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
       </intent-filter>
   </receiver></code>

This solution will allow you to listen for network connectivity changes in your Android application and react accordingly.

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