Wie erkennt man Änderungen der Netzwerkkonnektivität in Android?

<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);
    // Check for active network and mobile network changes
    ...
  }
  ...
}</code>

<code class="xml"><!-- Required to monitor network connectivity changes -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /></code>

<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>