android-loadermanager

I'm developing an Android application that is targeting API level 8 (2.2, Froyo). I'm using a ContentProvider and that's simple enough, and I'm using SimpleCursorAdapter to fill out my list view, but I noticed in the documentation for SimpleCursorAdapter that the flagless constructor is deprecated with the following note: This constructor is deprecated. This option is discouraged, as it results in Cursor queries being performed on the application's UI thread and thus can cause poor responsiveness or even Application Not Responding errors. As an alternative, use LoaderManager with a

I have a data loading system set up using a custom Loader and Cursor that is working great from Activities and Fragments but there is no LoaderManager (that I can find) in Service. Does anyone know why LoaderManager was excluded from Service? If not is there a way around this? Does anyone know why LoaderManager was excluded from Service? As stated in the other answer, LoaderManager was explicitly designed to manage Loaders through the lifecycles of Acivities and Fragments . Since Services do not have these configuration changes to deal with, using a LoaderManager isn't necessary. If not is

With 3.0 we got the fancy LoaderManager , which handles data loading using the AsyncTaskLoader , the CursorLoader , and other custom Loader instances. But reading through the docs for these I just couldn't get the point: how are these better than just using the good old AsyncTask for data loading? Well they are a lot simpler to implement, and take care of everything about lifecycle management so are much less error prone. Just look at the sample code, for showing the result of a cursor query which lets the user interactively filter the result set through a query input field in the action bar:

I was going through some of my code and I realized I don't actually know how a CursorLoader and LoaderManager combination used with a CursorAdapter connect. Heres the part that I am confused in. agendaAdapter = new MyAgendaAdapter(this, null); makeProviderBundle(new String[] {"_id", "event_name", "start_date", "start_time", "end_date", "end_time", "location"}, "date(?) >= start_date and date(?) <= end_date", new String[]{getChosenDate(), getChosenDate()}, null); getLoaderManager().initLoader(0, myBundle, MainDisplayActivity.this); list.setAdapter(agendaAdapter); So how does the query() method

I use Cursors extensively in my app, to load and occasionally write information from and to a database. I have seen that Honeycomb and the Compatibility Package have new Loader classes designed to help with loading data in a "good" way. Essentially, are these new classes (in particular CursorLoader ) considerably better than previous methods of managing data? What is the benefit of a CursorLoader over managed Cursors for example? And I use a ContentProvider to deal with data, which obviously takes Uris but how does this mesh with the initLoader() method? Must I set up each of my Fragments to

I'm having trouble following a guide on using SQLite in Android. I'm using a ListFragment instead of a ListActivity (as in the example), so I have the ListFragment implement LoaderManager.LoaderCallbacks<Cursor> instead. Then, in the fillData() method in the ListFragment : private void fillData() { // Fields from the database (projection) // Must include the _id column for the adapter to work String[] from = new String[] { NotesSQLiteHelper.COLUMN_TITLE }; // Fields on the UI to which we map int[] to = new int[] { R.id.label }; getLoaderManager().initLoader(0, null, this); //error adapter =

I know this has been discussed yet I wanted to ask about the current state of the matter. Do i have to create a ContentProvider to use CursorLoader in connection with a sqlite database? I found CursorLoader usage without ContentProvider Looks exactly what I was hoping for yet as Emmby commented Users should be aware of one limitation, which is that it has no mechanism to refresh on data changes (as Loaders are supposed to do) So another solution is mentioned https://github.com/commonsguy/cwac-loaderex yet again some drawback is pointed out However, to make use of the automatic re-querying, you

I am currently trying to learn how to use Loaders and am having trouble starting a Loader in my activity. import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; public class ASwitchActivity extends Activity implements LoaderManager.LoaderCallbacks<SampleLoader.SampleLoaderResult> { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); getLoaderManager().initLoader(0, null, this); } public Loader<SampleLoader.SampleLoaderResult> onCreateLoader(int id, Bundle args) { return new SampleLoader