Update activity listview from listener

Question

I have a helper class to handle Network Service Discovery, where I declare the NsdManager.ResolveListener, once it resolves a service I want to update the Activity list view.

My Activity onStart

@Override
protected void onStart() {
    mNsdHelper = new NsdHelper(this);
    mNsdHelper.initializeNsd();
    super.onStart();
}

I want to update back the activity once the service is resolved:

    mResolveListener = new NsdManager.ResolveListener() {
        @Override
        public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode) {
            Log.e(TAG, "Resolve failed" + errorCode);
        }
        @Override
        public void onServiceResolved(NsdServiceInfo serviceInfo) {
            Log.e(TAG, "Resolve Succeeded. " + serviceInfo);
            mService = serviceInfo;
        }
    };

How do I do that?

I'd suggest using a 3rd party library called EventBus. It's good for this kind of stuff. Google it, they have good docs to get you started easily. — Vucko, Jul 19 '16 at 19:21
Why would he need to use EventBus? He's not bridging Service/Activity or BroadcastReceiver/Activity. Seems like a sledge hammer for a nail. — Austin Hanson, Jul 19 '16 at 19:23

score 1 · Answer 1 · edited May 23 '17 at 11:58

1

Use Activity.runOnUiThread(Runnable) to affect some change to your ListView Adapter's backing data model on the main thread. Afterwards, call Adapter.notifyDataSetChanged(). See How to refresh Android listview?

edited May 23 '17 at 11:58

Community

1
1

answered Jul 19 '16 at 19:25

Austin Hanson

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Wouldn't it couple the Activity to the class? – Doron Sinai Jul 19 '16 at 20:07
EventBus couples a "listener" too - it's just hidden in static classes. – Austin Hanson Jul 19 '16 at 20:54

Update activity listview from listener

1 Answers1