android-handler

I am trying to implement AsyncQueryHandler because I am experiencing the same exact problem in this link but I dont see any example or anything about implementing it. I tried doing AsyncQueryHandler handler = new AsyncQueryHandler(getContentResolver()); since that is what the constructor shows in the docs but I get an error saying cannot instantiate the type AsyncQueryHandler so how do I use it then? AsyncQueryHandler is an abstract class, thus you cannot instantiate it directly. You need to subclass it. Crossle Song It's so convenient: AsyncQueryHandler handler = new AsyncQueryHandler

I am using a Loader in my application and based on the result I get from the query I perform on COntacts using this Loader I perform some calculations and store them back in a Sqlite DB. I want this operation to be Asynchronous, however I am confused between using an Async task, as I have lot of different data types to return or should I use a simple handler or an AsyncTaskLoader, I want it to be simple as I am new to Loaders. I tried to search around for examples of AsyncTaskLoader but it seems rocket science, a basic and simple functional example of any of the three in the context of my

I've seen many examples of how to do this, but I can't figure how to implement it in my code. I using this code . I have updated the url, so it will receive a json with dynamic data. What I'm trying to do is to automatically update the list every 30 secs with this code. Handler handler = new Handler(); Runnable refresh = new Runnable() { public void run() { new GetContacts().execute(); handler.postDelayed(refresh, 30000); } }; It refreshed, and call the url and gets the data, but the UI does not get updated. Thank for any hints that helps my in the right direction. http://www.androidhive.info

I call multiple Handlers by new Handler().postDelayed(new Runnable()..... How can I stop it, if I click on return button? public class Tag1 extends Oberklasse implements OnClickListener { public Button btn; //private Handler myHandler = new Handler(); Handler handler; Runnable myRunnable; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.tt1); //Bildschirm soll anbleiben!!! getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); //Lautstärke BUttons enable setVolumeControlStream(AudioManager.STREAM_MUSIC);

I'm trying to wrap my head around threading, and I know that I may use a Handler to post messages/runnables to the MessageQueue , which in turn gets picked up by the Looper and sent back to the Handler for processing. If I post to a handler in my activity, is the Activity , Handler , MessageQueue and Looper all running on the UI thread? If not, could someone please explain how this all comes together? :) user634618 Short answer: they all run on the same thread. If instantiated from an Activity lifecycle callback, they all run on the main UI thread. Long answer: A thread may have a Looper ,