Question

I have an activity which registers an Observer using the following code

Activity:

//Register for network status updates
NetworkStatus networkStatus = new NetworkStatus(this);
networkStatus.addObserver(new OfflineActivity());
Thread thread = new Thread(networkStatus);
thread.run();

Subject:

@Override
public void run() {

    for(;;) {
        Log.d("NetworkStatus", "Checking Network Status");
        if(isConnectedToInternet(context)){
            notifyObservers();
            Log.d("NetworkStatus", "Network Connection is established");
        }
        else {
            Log.d("NetworkStatus", "Not connected to network");
        }
    }   
}

When I click into the activity, the program becomes unresponsive.. Any ideas?

Answer 1

You should be using .start();

Thread thread = new Thread(networkStatus);
thread.start();

when you explictly call the run method, it doesn’t actually spawn a new Thread, instead the method call still runs in the UI Thread.