How can I receive a notification when the device loses network connectivity in android L (API 21)

Question

I\'m using this code to be notified when the connection is lost in API 20 and down.

registerReceiver(getConnectivityStateBroadcastReceiver(), new IntentFilte         


        

Answer 1

I'll paste my complete solution since I needed to look into many places in order to make it work:

In Application class

public void onCreate(){
...

IntentFilter filter = new IntentFilter();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        Timber.d("using registerNetworkCallback");
        createChangeConnectivityMonitor();
        filter.addAction(MY_CONNECTIVITY_CHANGE);
    } else {
        Timber.d("using old broadcast receiver");
        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    }

    registerReceiver(new SyncOnConnectivityReceiver(), filter);
 }

  @RequiresApi(Build.VERSION_CODES.N)
   private void createChangeConnectivityMonitor() {
    final Intent intent = new Intent(MY_CONNECTIVITY_CHANGE);
    ConnectivityManager connectivityManager = (ConnectivityManager) 
  getSystemService(Context.CONNECTIVITY_SERVICE);
    if (connectivityManager != null) {
        connectivityManager.registerNetworkCallback(
               new NetworkRequest.Builder().build(), 
               new ConnectivityManager.NetworkCallback() {
                    /**
                     * @param network
                     */
                    @Override
                    public void onAvailable(Network network) {
                        Timber.d("On available network");
                        sendBroadcast(intent);
                    }

                    /**
                     * @param network
                     */
                    @Override
                    public void onLost(Network network) {
                        Timber.d("On not available network");
                        sendBroadcast(intent);
                    }
                });
    }

}

In my receiver:

public class SyncOnConnectivityReceiver extends BroadcastReceiver {

@Override
 public void onReceive(@Nullable final Context context, Intent intent) {
    Timber.d("triggering on connectivity change");
    if (context != null && isNetworkAvailable(context)) {
        Executors.newSingleThreadExecutor().submit(new Runnable() {
            @Override
            public void run() {
                syncBusData(context);
            }
        });
    }
}

private boolean isNetworkAvailable(Context context) {
    ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (cm != null) {
        NetworkInfo networkInfo = cm.getActiveNetworkInfo();
        return networkInfo != null && networkInfo.isConnected();
    }
    return false;
}

private void syncData(Context context) {

}
}

In AndroidManifiest.xml