asynctaskloader

问题 I came to know that getSupportLoaderManager is deprecated. But I want to call: getSupportLoaderManager().initLoader(0, null, mRecipeLoaderManager); What should be an alternative to that call? Or can I still use getSupportLoaderManager without worrying? 回答1: As stated here: Loaders "Loaders have been deprecated as of Android P (API 28). The recommended option for dealing with loading data while handling the Activity and Fragment lifecycles is to use a combination of ViewModels and LiveData."

问题 I've converted my AsyncTask to an AsyncTaskLoader (mostly to deal with configuration changes). I have a TextView I am using as a progress status and was using onProgressUpdate in the AsyncTask to update it. It doesn't look like AsyncTaskLoader has an equivalent, so during loadInBackground (in the AsyncTaskLoader ) I'm using this: getActivity().runOnUiThread(new Runnable() { public void run() { ((TextView)getActivity().findViewById(R.id.status)).setText("Updating..."); } }); I am using this in

问题 I have been reading Android documentation (AsyncTask, Thread) and vogella tutorial about this matter, but I have doubts yet. For example, I want to send a message from an Android app to a server. And I would like this process to be responsive. What should I use? I have seen examples where they create a new Thread for not block UI, but this way we don't have the progress of process, also you have to process the response within the Thread because the run() method doesn't returning anything.

问题 I am using from AsyncLoader in my app . I want know onLoadFinished run after which method of my fragment during orientation change? I show a dialog when loader run first time @Override public Loader<ArrayList<HashMap<String, Object>>> onCreateLoader(int id,Bundle bundle) { handler.sendEmptyMessage(SendRequestLoader.ShowDialog); return loader; } I add listarray to my adapter @Override public void onLoadFinished(Loader<ArrayList<HashMap<String,Object>>> loader,ArrayList<HashMap<String,Object>>

问题 I want to implement an AsyncTaskLoader in my project using the Compatibility Package, so I followed the Loader manual in Android Docs. The problem is that the Loader does nothing, it seems loadInBackground() is never called Any idea of what's wrong in my code? ( ExpandableListFragment extends Fragment ,but doesn't override any critical method ) Thank you :-) /**EDIT: I realized (late, I'm a moron) that AsyncTaskLoader is an abstract class so I need to subclass it... m(__)m I leave the

问题 i have following code , i want image load first from drawable folder and after api. image successfully load from drawable folder using getData() method , but i don't know how to load image from url and update gridview . onPostExecute method when i update my grid below comment line crash the application that's why i comment my gridview code in method onPostExecute method please check and help me this I am New in Android please show example public class MainActivity extends AppCompatActivity {

问题 I want to cancel running AsyncTask (in AsyncTaskLoader) when the user clicks the home button. Here is what I created so far: package cz.davidliska.android.loaders; import java.text.SimpleDateFormat; import java.util.Date; import android.content.Context; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.app.LoaderManager; import android.support.v4.content.AsyncTaskLoader; import android.support.v4.content.Loader; import android.util.Log; public

问题 I want to cancel running AsyncTask (in AsyncTaskLoader) when the user clicks the home button. Here is what I created so far: package cz.davidliska.android.loaders; import java.text.SimpleDateFormat; import java.util.Date; import android.content.Context; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.app.LoaderManager; import android.support.v4.content.AsyncTaskLoader; import android.support.v4.content.Loader; import android.util.Log; public

问题 I am trying to understand some finer points of AsyncTaskLoaders. This may be obvious, to others but I can't find an unambiguous example or definition that demonstrates and exmplains what happens when you override the deliverResult() method. What actually gets delivered ? How does this interact with the calling object ? I can see use of super.deliverResult , which passes a private object from the class. So, does the loader automatically know what to associate with the "delivered result". I am

问题 SETUP: I have a singleton application class that has a method named fetchUpdates() . This method is called by an UpdaterService (an IntentService) class. fetchUpdates() method simply calls DownloadDataAsyncTask which then calls UpdateDbAsyncTask during onPostExecute if the data were successfully downloaded. Both AsyncTasks reside in the application class (not sure if this is relavant to the problem). public synchronized void fetchUpdates() { String[] mURLs = getURLs(); new