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2014/10/16 ¤W¤È 08:26:27
android Programming Glossary: threadshttp://stackoverflow.com/questions/1080811/android-endless-list entry pos return view You should obviously use separate threads for long running actions like loading web data and might want..
How to handle screen orientation change when progress dialog and background thread active? http://stackoverflow.com/questions/1111980/how-to-handle-screen-orientation-change-when-progress-dialog-and-background-thre stage where the app does not work at all until all the threads have been killed. How can I handle the screen orientation change..
How to close Android application? http://stackoverflow.com/questions/2092951/how-to-close-android-application P B NOTE B The app will not be killed until all of its threads have closed if it is killed safely. P P B NOTE B All threads.. have closed if it is killed safely. P P B NOTE B All threads running under the process will be abruptly killed when the app.. issues related to threading. For example if one of those threads was making multiple related changes to the database then it..
What are the best practices for SQLite on Android? http://stackoverflow.com/questions/2493331/what-are-the-best-practices-for-sqlite-on-android updates deletes and reads are generally OK from multiple threads but answer #1 is not correct. You have to be careful with how.. one db connection. Even if you use it from multiple threads one connection at a time. The SqliteDatabase object uses java.. uses java locks to keep access serialized. So if 100 threads have one db instance calls to the actual on disk database are..
Download a file with Android, and showing the progress in a ProgressDialog http://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog app when you extends Service you must manually spawn new threads to run CPU blocking operations . Download service can look like.. have to worry about downloading the file manually handle threads streams etc. GingerBread brought a new feature DownloadManager..
Is AsyncTask really conceptually flawed or am I just missing something? http://stackoverflow.com/questions/3357477/is-asynctask-really-conceptually-flawed-or-am-i-just-missing-something results on the UI thread without having to manipulate threads and or handlers. The example then continues to show how some..
Android: Is application running in background? http://stackoverflow.com/questions/3667022/android-is-application-running-in-background things. However it is off in another process managed by threads running separately from yours and not something you can count..
Running multiple AsyncTasks at the same time — not possible? http://stackoverflow.com/questions/4068984/running-multiple-asynctasks-at-the-same-time-not-possible thread. Starting with DONUT this was changed to a pool of threads allowing multiple tasks to operate in parallel. After HONEYCOMB.. Mar 7 at 1 27 . It turns out that for APIs where a pool of threads allowing multiple tasks to operate in parallel is used starting.. a thread pool executor with limited max number of worker threads 128 and the delayed tasks queue has fixed size 10 if you try..
Android HttpClient : NetworkOnMainThreadException http://stackoverflow.com/questions/11736530/android-httpclient-networkonmainthreadexception
Changing image in imageview using Threads http://stackoverflow.com/questions/16643177/changing-image-in-imageview-using-threads image in imageview using Threads I'm getting error with this code. Why huhu 123123123 Thread..
Max thread number for one application? http://stackoverflow.com/questions/2138510/max-thread-number-for-one-application You know Thread.activeCount returns the number of active Threads in the running Thread's group and its subgroups. If I can know..
What is the Android UiThread (UI thread) http://stackoverflow.com/questions/3652560/what-is-the-android-uithread-ui-thread thread. For more info on your applications Processes and Threads click here. When you explicitly spawn a new thread to do work..
Threading UI updates in Android http://stackoverflow.com/questions/3745405/threading-ui-updates-in-android I have absolutely no idea how since really I've never used Threads. The examples that Google gives on using Threads doesn't seem.. used Threads. The examples that Google gives on using Threads doesn't seem to be very clear and I couldn't really follow it.. of how I could do what I'm doing here efficiently using Threads Thanks in advance java android multithreading user interface..
AsyncTask doInBackground does not run [duplicate] http://stackoverflow.com/questions/4080808/asynctask-doinbackground-does-not-run UPDATE I have tested using a combination of traditional Threads and runOnUiThread method and it seems to work better. Now the..
Android - Hold Button to Repeat Action http://stackoverflow.com/questions/4284224/android-hold-button-to-repeat-action my approach. I think the onTouchListener is ok but the way Threads are handled doesnt feel right. Is there a better or more simple..
SharedPreferences and Thread Safety http://stackoverflow.com/questions/4693387/sharedpreferences-and-thread-safety share improve this question Processes and Threads are different. The SharedPreferences implementation in Android..
Whats the difference between Thread.setPriority() and android.os.Process.setThreadPriority() http://stackoverflow.com/questions/5198518/whats-the-difference-between-thread-setpriority-and-android-os-process-setthre The current Dalvik implementation seems to map Java Threads ony by one to the underlying linux system PTHREADs like you.. to the underlying linux system PTHREADs like you say. All Threads of all apps belong on the same thread group on the system so.. group on the system so every Thread competes with all Threads of all apps. So currently Thread.setPriority should actually..
Running a repeating task in background on a real time application [duplicate] http://stackoverflow.com/questions/5774092/running-a-repeating-task-in-background-on-a-real-time-application needs to make the calculations and throw the event Timer Threads AsynkTask AlarmManager Another approach I want to keep getting..
How can an Android application have more than one process? http://stackoverflow.com/questions/6567768/how-can-an-android-application-have-more-than-one-process it have 2 processes I did some reading at Processes and Threads to try to understand more about processes. It talks about having..
Is Sqlite Database instance thread safe http://stackoverflow.com/questions/6675240/is-sqlite-database-instance-thread-safe and database locking Android SQLite SharedPreferences 2 Threads Simultaneous Read Write https groups.google.com forum # topic..
Where to stop/destroy threads in Android Service class? http://stackoverflow.com/questions/680180/where-to-stop-destroy-threads-in-android-service-class if your app quits . Obeying best practices with regards to Threads should ensure that your app doesn't hang or slow down the phone..
Handler vs AsyncTask vs Thread http://stackoverflow.com/questions/6964011/handler-vs-asynctask-vs-thread about the differences between Handlers AsyncTasks and Threads in Android. I've read quite a few blogs and questions here in.. fetching webservices. Later you can interact with the UI. Threads however can't interact with the UI provide more basic threading..
http://stackoverflow.com/questions/7931032/android-process-scheduling process. This is referenced from here Processes and Threads EDIT Understanding Application Priority and Process States The..
How to resolve the ANR error while invoking the Camera? http://stackoverflow.com/questions/8543486/how-to-resolve-the-anr-error-while-invoking-the-camera on at the time of the ANR Also If ANR is caused because of Threads you can user Service for that So your app can do the time consuming..
http://stackoverflow.com/questions/1080811/android-endless-list p TextView view new TextView Test.this view.setText entry pos return view You should obviously use separate threads for long running actions like loading web data and might want to indicate progress in the last list item like the market..
How to handle screen orientation change when progress dialog and background thread active? http://stackoverflow.com/questions/1111980/how-to-handle-screen-orientation-change-when-progress-dialog-and-background-thre point the app either crashes or deadlocks or gets into a weird stage where the app does not work at all until all the threads have been killed. How can I handle the screen orientation change gracefully The sample code below matches roughly what my..
How to close Android application? http://stackoverflow.com/questions/2092951/how-to-close-android-application running in a new process if the user starts the app again. P B NOTE B The app will not be killed until all of its threads have closed if it is killed safely. P P B NOTE B All threads running under the process will be abruptly killed when the.. P B NOTE B The app will not be killed until all of its threads have closed if it is killed safely. P P B NOTE B All threads running under the process will be abruptly killed when the app is killed quickly. This can lead to various issues related.. when the app is killed quickly. This can lead to various issues related to threading. For example if one of those threads was making multiple related changes to the database then it may have committed some of those changes but not all of those..
What are the best practices for SQLite on Android? http://stackoverflow.com/questions/2493331/what-are-the-best-practices-for-sqlite-on-android sqlite sqlite3 share improve this question Inserts updates deletes and reads are generally OK from multiple threads but answer #1 is not correct. You have to be careful with how you create your connections and use them. There are situations.. the write database connection regardless. So one helper instance one db connection. Even if you use it from multiple threads one connection at a time. The SqliteDatabase object uses java locks to keep access serialized. So if 100 threads have one.. threads one connection at a time. The SqliteDatabase object uses java locks to keep access serialized. So if 100 threads have one db instance calls to the actual on disk database are serialized. So one helper one db connection which is serialized..
Download a file with Android, and showing the progress in a ProgressDialog http://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog know that a Service runs actually in the same thread of your app when you extends Service you must manually spawn new threads to run CPU blocking operations . Download service can look like this public class DownloadService extends IntentService.. GingerBread and newer only This method is awesome you do not have to worry about downloading the file manually handle threads streams etc. GingerBread brought a new feature DownloadManager which allows you to download files easily and delegate the..
Is AsyncTask really conceptually flawed or am I just missing something? http://stackoverflow.com/questions/3357477/is-asynctask-really-conceptually-flawed-or-am-i-just-missing-something it allows to perform background operations and publish results on the UI thread without having to manipulate threads and or handlers. The example then continues to show how some exemplary showDialog method is called in onPostExecute . This..
Android: Is application running in background? http://stackoverflow.com/questions/3667022/android-is-application-running-in-background manager or such. Yes there is a list kept in memory for these things. However it is off in another process managed by threads running separately from yours and not something you can count on a seeing in time to make the correct decision or b have..
Running multiple AsyncTasks at the same time — not possible? http://stackoverflow.com/questions/4068984/running-multiple-asynctasks-at-the-same-time-not-possible AsyncTasks were executed serially on a single background thread. Starting with DONUT this was changed to a pool of threads allowing multiple tasks to operate in parallel. After HONEYCOMB it is planned to change this back to a single thread to.. is Android 3.0. UPDATE 2 See the comment by kabuko from Mar 7 at 1 27 . It turns out that for APIs where a pool of threads allowing multiple tasks to operate in parallel is used starting from 1.6 and ending on 3.0 the number of simultaneously.. many tasks can be run simultaneously. Since AsyncTask uses a thread pool executor with limited max number of worker threads 128 and the delayed tasks queue has fixed size 10 if you try to execute more than 138 your custom tasks the app will crash..
Android HttpClient : NetworkOnMainThreadException http://stackoverflow.com/questions/11736530/android-httpclient-networkonmainthreadexception
Changing image in imageview using Threads http://stackoverflow.com/questions/16643177/changing-image-in-imageview-using-threads image in imageview using Threads I'm getting error with this code. Why huhu 123123123 Thread timer new Thread public void run try sleep 1500 splash.setImgeResource..
Max thread number for one application? http://stackoverflow.com/questions/2138510/max-thread-number-for-one-application I wanna know about max thread number for one application. You know Thread.activeCount returns the number of active Threads in the running Thread's group and its subgroups. If I can know the max number of threads to create in current activity I..
What is the Android UiThread (UI thread) http://stackoverflow.com/questions/3652560/what-is-the-android-uithread-ui-thread the UI to be updated or changed HAS to happen on the UI thread. For more info on your applications Processes and Threads click here. When you explicitly spawn a new thread to do work in the background this code is not is not run on the UIThread...
Threading UI updates in Android http://stackoverflow.com/questions/3745405/threading-ui-updates-in-android and failing to pass it off to another thread. Trouble is I have absolutely no idea how since really I've never used Threads. The examples that Google gives on using Threads doesn't seem to be very clear and I couldn't really follow it for what.. Trouble is I have absolutely no idea how since really I've never used Threads. The examples that Google gives on using Threads doesn't seem to be very clear and I couldn't really follow it for what I want to do. Could I ask somebody out here to give.. I ask somebody out here to give me the most basic example of how I could do what I'm doing here efficiently using Threads Thanks in advance java android multithreading user interface share improve this question Well I guess there is some..
AsyncTask doInBackground does not run [duplicate] http://stackoverflow.com/questions/4080808/asynctask-doinbackground-does-not-run protected void onDestroy super.onDestroy task.cancel true UPDATE I have tested using a combination of traditional Threads and runOnUiThread method and it seems to work better. Now the thread runs every time. android android asynctask share..
Android - Hold Button to Repeat Action http://stackoverflow.com/questions/4284224/android-hold-button-to-repeat-action if I've missed bits out but hopefully this explains my approach. I think the onTouchListener is ok but the way Threads are handled doesnt feel right. Is there a better or more simple way to do this Thanks M public class MyApp extends Activity..
SharedPreferences and Thread Safety http://stackoverflow.com/questions/4693387/sharedpreferences-and-thread-safety an application that persists android thread safety sharedpreferences share improve this question Processes and Threads are different. The SharedPreferences implementation in Android is thread safe but not process safe. Normally your app will..
Whats the difference between Thread.setPriority() and android.os.Process.setThreadPriority() http://stackoverflow.com/questions/5198518/whats-the-difference-between-thread-setpriority-and-android-os-process-setthre as far as I can tell. android share improve this question The current Dalvik implementation seems to map Java Threads ony by one to the underlying linux system PTHREADs like you say. All Threads of all apps belong on the same thread group.. Dalvik implementation seems to map Java Threads ony by one to the underlying linux system PTHREADs like you say. All Threads of all apps belong on the same thread group on the system so every Thread competes with all Threads of all apps. So currently.. like you say. All Threads of all apps belong on the same thread group on the system so every Thread competes with all Threads of all apps. So currently Thread.setPriority should actually do the same as Process.setThreadPritority using the smaller..
Running a repeating task in background on a real time application [duplicate] http://stackoverflow.com/questions/5774092/running-a-repeating-task-in-background-on-a-real-time-application battery drain . What's the best approach for the task that needs to make the calculations and throw the event Timer Threads AsynkTask AlarmManager Another approach I want to keep getting sensors data and saving them to the database despite if the..
How can an Android application have more than one process? http://stackoverflow.com/questions/6567768/how-can-an-android-application-have-more-than-one-process that Google Services has 2 processes and 1 service. How can it have 2 processes I did some reading at Processes and Threads to try to understand more about processes. It talks about having a manifest entry but without a concrete example I don't..
Is Sqlite Database instance thread safe http://stackoverflow.com/questions/6675240/is-sqlite-database-instance-thread-safe www.touchtech.co blog android sqlite locking Android threading and database locking Android SQLite SharedPreferences 2 Threads Simultaneous Read Write https groups.google.com forum # topic android developers s3blUf7CRhU share improve this answer..
Where to stop/destroy threads in Android Service class? http://stackoverflow.com/questions/680180/where-to-stop-destroy-threads-in-android-service-class if there are no non daemon threads running such as if your app quits . Obeying best practices with regards to Threads should ensure that your app doesn't hang or slow down the phone though they can be quite complex share improve this answer..
Handler vs AsyncTask vs Thread http://stackoverflow.com/questions/6964011/handler-vs-asynctask-vs-thread vs AsyncTask vs Thread I got slightly confused about the differences between Handlers AsyncTasks and Threads in Android. I've read quite a few blogs and questions here in stackoverflow. Handlers are background threads that provide.. in the UI thread so its good for fetching data for instance fetching webservices. Later you can interact with the UI. Threads however can't interact with the UI provide more basic threading and you miss all the abstractions of AsyncTasks. However..
http://stackoverflow.com/questions/7931032/android-process-scheduling activity the process is ranked as a visible process not a service process. This is referenced from here Processes and Threads EDIT Understanding Application Priority and Process States The order in which processes are killed to reclaim resources..
How to resolve the ANR error while invoking the Camera? http://stackoverflow.com/questions/8543486/how-to-resolve-the-anr-error-while-invoking-the-camera the same time. That should show you precisely whats going on at the time of the ANR Also If ANR is caused because of Threads you can user Service for that So your app can do the time consuming tasks inside service.onStart passing data for example..
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