Android - BroadCast Receiver - Check Connectivity

BaseActivity.java

public class BaseActivity extends Activity implements OnConnectivityChangedListener {

    private ConnectivityChangeReceiver connectivityChangeReceiver;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        connectivityChangeReceiver = new ConnectivityChangeReceiver(this);
        IntentFilter filter = new IntentFilter();
        filter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
        registerReceiver(connectivityChangeReceiver, filter);
    }

    @Override
    public void onConnectivityChanged(boolean isConnected) {
        // TODO handle connectivity change
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(connectivityChangeReceiver);
    }
}

ConnectivityChangeReceiver.java

public class ConnectivityChangeReceiver extends BroadcastReceiver {

    private OnConnectivityChangedListener listener;

    public ConnectivityChangeReceiver(OnConnectivityChangedListener listener) {
        this.listener = listener;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager connectivityManager = (ConnectivityManager) 
                context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        boolean isConnected = activeNetInfo != null && activeNetInfo.isConnectedOrConnecting();  
        listener.onConnectivityChanged(isConnected);
    }

    public interface OnConnectivityChangedListener {
        void onConnectivityChanged(boolean isConnected);
    }
}