android-looper

Desktop library for testing a real-time Android app

由 做~自己de王妃 提交于 2019-12-11 07:04:29
问题 I've written a real-time application for Android that receives hundreds of input events per second and spits out a few output events per second. The input events drive state machines to produce the output events. I write both the input and output events to a file for each run. I want to use the files of runs that I deem valid for regression testing. I'll feed the recorded input events to the system and look for the expected output events. My system receives events via a looper/handler and

Track Gps At every 10 minutes using timer in android

由 久未见 提交于 2019-12-11 04:12:55
问题 I am developing an android application and I am using a service that tracks location via GPS every 10 minutes. But when I put the location listener in a timer task, it throws an exception: Cannot put code inside thread that has not called looper.prepare() . Does anyone have any insight on this problem? 回答1: You need not to start a service for recieving locationUpdate every 10 min instead do something like this mLocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

Handle response of WorkManager on Network connection Failure

由 梦想与她 提交于 2019-12-07 04:49:44
问题 I'm using WorkManager to sync data from my local Room database to server. The issue is that Room gives error to build database in Loop.MainLooper() and when i use it as following it works fine. But I'm unable to return the 'WorkerResult' on SUCCESS or RETRY based upon task completion. How to stop worker when Netwrok is lost? public class TestSyncManager extends Worker { private final WorkerResult[] workerResult = {WorkerResult.SUCCESS}; // @Inject // Dagger2 has not added the support for

Handle response of WorkManager on Network connection Failure

由 旧巷老猫 提交于 2019-12-05 11:37:00
I'm using WorkManager to sync data from my local Room database to server. The issue is that Room gives error to build database in Loop.MainLooper() and when i use it as following it works fine. But I'm unable to return the 'WorkerResult' on SUCCESS or RETRY based upon task completion. How to stop worker when Netwrok is lost? public class TestSyncManager extends Worker { private final WorkerResult[] workerResult = {WorkerResult.SUCCESS}; // @Inject // Dagger2 has not added the support for dependency injection in worker yet. private ApiHeader mApiHeader; private HandlerThread mHandlerThread;

NullPointerException in HandlerThread

由 て烟熏妆下的殇ゞ 提交于 2019-12-04 07:08:24
This bug baffled me for hours. I am getting the NullPointerException . The problem is this error is not consistent. It happens when I launch the app, but only occasionally. So I am not sure what is causing it. I apologize for the verbose question with the error log, but I could not find another way of asking. The error log is as follows: FATAL EXCEPTION: main Process: com.myproject.android, PID: 22175 java.lang.NullPointerException at com.myproject.android.ImageDownloaderThread.queueImage(ImageDownloaderThread.java:74) at com.myproject.android.NewsItemPagerActivity

Is a Handler a Thread or not, and what is the role of a Looper with Handlers and Threads?

由 喜你入骨 提交于 2019-12-03 20:57:29
Is a Handler a Thread or not? If yes, how can we update the UI from this Handler(thread)? If we use the Looper concept, it may be possible. In this case, does it apply to any threads? I am very much confused about these Threads, Handlers and Loopers. Could anyone please explain them with an example? Is a Handler a Thread or not? If yes, how can we update the UI from this Handler(thread). If we use the Looper concept, it may be possible, in this case does it apply to any threads? I am very much confused about this Thread, Handler and Looper. Could anyone please explain them with an example? The

Android AsyncTask [Can't create handler inside thread that has not called Looper.prepare()]

由 筅森魡賤 提交于 2019-11-30 12:58:21
问题 I've created an image upload AsyncTask based on a function. And after uploading, I get this error on onPostExecute() . I read up some StackOverflow answers on Runnable yet I kept getting the error over and over again despite implementing a different solution. My code : class uploadFile extends AsyncTask<String, String, String> { private ProgressDialog pDialog; /** * -------------------------------------------------------------------- * --------------------------------- Before starting

Android AsyncTask [Can't create handler inside thread that has not called Looper.prepare()]

由 纵然是瞬间 提交于 2019-11-30 04:29:58
I've created an image upload AsyncTask based on a function. And after uploading, I get this error on onPostExecute() . I read up some StackOverflow answers on Runnable yet I kept getting the error over and over again despite implementing a different solution. My code : class uploadFile extends AsyncTask<String, String, String> { private ProgressDialog pDialog; /** * -------------------------------------------------------------------- * --------------------------------- Before starting background thread * Show Progress Dialog */ @Override protected void onPreExecute() { super.onPreExecute();

Handlers, MessageQueue, Looper, do they all run on the UI thread?

由 被刻印的时光 ゝ 提交于 2019-11-26 21:27:22
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 ,

Handlers, MessageQueue, Looper, do they all run on the UI thread?

由 。_饼干妹妹 提交于 2019-11-26 12:18:12
问题 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? :) 回答1: Short answer: they all run on the same thread. If instantiated from an Activity
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