looper

I created a class extending Thread to retrieve user location through LocationManager in a non-ui thread. I implemented this as a thread because it has to be started on request and do its work just for a limited time. By the way, I had to add a Looper object in the thread, to be able to create the handler for the LocationManager (onLocationChanged). This is the code: public class UserLocationThread extends Thread implements LocationListener { //... public void run() { try { Looper.prepare(); locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this); Looper.loop();

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I was wondering how the Looper class actually processes Runnables (via the Handler class) in the Thread that the Looper is attached to? If a looper is looping through its messageQueue then surely it would be a blocking operation for that thread? I imagine it itself must be performing some threading trickery but then how does it add the posted Runnables run() method onto the host threads stack? Many questions! Any help would be much appreciated. Thanks! EDIT: Looking through the Looper class file class i see the below, which

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I wanted to hide the action bar after the 1 second delay, Timer().schedule(new TimerTask() { @Override public void run() { getSupportActionBar().hide(); } }, 1000); Getting crash after I ran the code.. android.util.AndroidRuntimeException: Animators may only be run on Looper threads Is there any solution for this issue? Thanks. 回答1: Solved it by using new Handler().postDelayed(new Runnable() { @Override public void run() { getSupportActionBar().hide(); } }, 1000); 文章来源: Animators may only be run on Looper threads on Sherlock Action Bar

I've got a code with an ASyncTask and the problem is that when I execute it several times it crashes with this exception: RuntimeException: Only one Looper may be created per thread But then I've read this: https://stackoverflow.com/a/7781280/869180 and I remembered that I had a similar error in the past and it was related to the UI stuff (a ProgressDialog in my case) created in the ASyncTask. So I took off all the UI stuff from the ASyncTask and I removed Looper.prepare too, to avoid that RuntimeException, but know I'm getting this: 12-21 00:34:17.363: W/System.err(18658): java.lang

I am using some older code and in running this method, I get the Looper.prepare() error. I don't understand what the line means but it is very necessary. Overall program: I have an AsyncTask that calls a method which calls doBindService()--from doInBackground()--. I have read the numerous other questions about this error and I guess I have a threading error but I can't figure out what the issue is. public rNOC doBindService(){ _server = new rNOC(this);//CODE FAILING HERE return _server; } *** Uncaught remote exception! (Exceptions are not yet supported across processes.) java.lang

I am using an Executor [fixed thread pool] with my own ThreadFactory that adds a Looper: Handler HANDLER = new Handler(); Executor THREADS = Executors.newFixedThreadPool(THREAD_POOL_SIZE, new ThreadFactory() { @Override public Thread newThread(Runnable runnable) { return new MyThread(new Runnable() { @Override public void run() { Looper.prepare(); runnable.run(); } }); } }); private static class MyHandler extends Handler { public boolean fail; public void handleMessage(Message msg) { switch(msg.what) { case 1: this.fail = msg.arg1 == 1; Looper.myLooper().quit(); break; } } } } I am running a

I have a Game Activity (Activity A) that works well with all the code. Then I create a new Activity (Activity B) for my new game mode, that extends Activity A. However, when encounter the Toast line, Activity B suddenly thrown an exception (Activity A works well showing the Toast): Can't create handler inside thread that has not called Looper.prepare() Activity B only overrides a load-level method, no any differrence! Try this: Handler innerHandler; (new Thread(new Runnable() { @Override public void run() { Looper.prepare(); innerHandler = new Handler() { @Override public void handleMessage