android-asynctask

问题 private static class SerialExecutor implements Executor { final ArrayDeque<Runnable> mTasks = new ArrayDeque<Runnable>(); Runnable mActive; public synchronized void execute(final Runnable r) { mTasks.offer(new Runnable() { public void run() { try { r.run(); } finally { scheduleNext(); } } }); if (mActive == null) { scheduleNext(); } } protected synchronized void scheduleNext() { if ((mActive = mTasks.poll()) != null) { THREAD_POOL_EXECUTOR.execute(mActive); } } } Above code snippet is from

问题 lang.NullPointerException android.widget.ArrayAdapter.init(ArrayAdapter.java) just am adding Arraylist values into customAdapter class and setting that values into listview see below code helpm me thanks private void fetchCallLogsDetails(String selectedId) { this.SelectedLogId = selectedId; new FetchCallLogDetailsAsyncTask() { protected void onPostExecute(Boolean result) { if (mCallLogModel.getmPhoto() != null) { mCallLogPhoto.setImageBitmap(mCallLogModel.getmPhoto()); } mCallLogDetailName

问题 I am having a little problems with AsyncTask. I have it implemented as follows private class MakeConnection extends AsyncTask<String, Void, String> implements OnDismissListener{ Context context; ProgressDialog myDialog; public MakeConnection(Context conetext) { this.context = conetext; myDialog = new ProgressDialog(this.context); myDialog.setCancelable(true); myDialog.setOnDismissListener(this); } @Override protected String doInBackground(String... urls) { //do stuff } @Override protected

问题 I am creating an application where in i need to have endless scrolling listview. I dnt want to use any library in my application. I have seen some examples on line that help in achieving such listview,but my doubt is how can i have an endless listview when my data are coming from server and are getting parsed in the Asynctask. How can i load 10 items at a time from my asynctask on scroll? I want to know to implement a endless listview on asyntask. Do i call my asynctask in the onScroll() or

问题 I am parsing the xml file containing some names using the Async task and populating these names to the listview again via the main thread. But whats happening in my case is, when the Async task is still running, the main thread is already populating the names to the listview which is resulting in no items on the listview. Should i make the main thread wait until the Async task finish the job or is there any other way to solve this prob.? if yes how can i make the main thread wait when i don't

问题 I want to call multiple AsynTask . It was not working so I google for some help. I found that If I use AsyncTask.THREAD_POOL_EXECUTOR then it will work. But It is not working. I am calling it as below: new GetCategory().execute(); new GetArea().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); Please help me regarding this issue. I want to call it at a time or it is also ok if GetArea() call after GetCategory() . I am not getting error. Application may be doing too much work. Logcat: 03-13

问题 I want to call multiple AsynTask . It was not working so I google for some help. I found that If I use AsyncTask.THREAD_POOL_EXECUTOR then it will work. But It is not working. I am calling it as below: new GetCategory().execute(); new GetArea().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); Please help me regarding this issue. I want to call it at a time or it is also ok if GetArea() call after GetCategory() . I am not getting error. Application may be doing too much work. Logcat: 03-13

问题 I currently have a helper class to perform rudimentary AsyncTasks such as the following. I call the function from an activity as and when needed. The code seems to work fine and I haven't encountered any problems. But, I was wondering if this is a good coding practice or if there were any ramifications that I am unaware of. Any feedback would be gladly accepted and appreciated. public class OtherUtils { public static void updatePromptsOption(final boolean showPrompt, final Context context) {

问题 I currently have a helper class to perform rudimentary AsyncTasks such as the following. I call the function from an activity as and when needed. The code seems to work fine and I haven't encountered any problems. But, I was wondering if this is a good coding practice or if there were any ramifications that I am unaware of. Any feedback would be gladly accepted and appreciated. public class OtherUtils { public static void updatePromptsOption(final boolean showPrompt, final Context context) {

问题 I have implemented an internal AsyncTask for my class that does initial setup data query from server and stores into device cache. The setup data in split between 2 JSON files. The first JSON is read/cached and if certain conditions are on then second JSON file will be downloaded and stored into cache. I want to use same AsyncTask from both operations. In doInBackground(), I perform JSON download operation independent of JSON type. But in onPostExecute() I want to call different callbacks