FAQ Database Discussion Community


What's practical purpose of cursorLoader?

android,android-sqlite,android-cursor,android-cursorloader
I saw some articles about cursorLoader like this, but i still don't understand the particular purpose of using it. I developed apps with sql and cursor retrieving. The point is it was very fast. I queried and parsed cursor with >500 record and 8 columns by a few millisecond. So...

Using Custom Adapter with CursorLoader

android,baseadapter,custom-adapter,android-cursor,android-cursorloader
I'm trying to use CursorLoader to fetch data from my ContentProvider off the UI thread. I then use it to populate my list view. I was using SimpleCursorAdapter before and it works all fine. But now I want to have different views for the list view rows depending upon the...

Android, Listener/Observer/Callback on calendar event change

android,calendar,android-calendar,android-cursorloader,contentobserver
I am writing an application that needs to know when a meeting is added/removed/changed in the calendar. I know how to get all the data from a calendar using CursorLoader on the calendar uri. Also i know how to listen to calendar changes using the ContentObserver. The problem is that...

Stop refreshing listView on change in Database

android,listview,android-cursorloader
I am creating a ListView using cursorLoader. If any changes happen in Database, i don't want to refresh my list data or restart loader. Is there any solution? Here is how i am loading my data from my database. @Override public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) { String SELECTION =...

CursorLoader, unsubscribe from ContentProvider notifications

java,android,cursor,android-contentprovider,android-cursorloader
I'm using a CursorLoader to query a ContentProvider to populate a ListView, with the following code (wrapped in a LoaderManager): CursorLoader loader = new CursorLoader(getActivity(), Provider.CONTENT_SOME_URI, projection, selection, null, null); And an AsyncQueryHandler to update SOME_VALUE for a given _id triggered on click on a CheckBox placed on every single...

int android.database.Cursor.getCount()' on a null object reference

java,android,sqlite,android-sqlite,android-cursorloader
got null poiner exception at cursor.getCount(); while doing ListView using cursor loader adapter class as below public class FriendsListCursorAdapter extends CursorAdapter { private Cursor cursor; final VROPreferenceManager preferenceManager = new VROPreferenceManager(); Context con; public FriendsListCursorAdapter(Context context, Cursor c, boolean b) { super(context,c,true); cursor = c; con=context; } public void addItems(Cursor...

How can I reference a cursor

android,simplecursoradapter,android-cursoradapter,android-cursorloader
I wish to use a CursorLoader in my application but I don't want to use the returned cursor with a SimpleCursorAdapter. I just want to get a reference of the cursor returned from onLoadFinished() Here is some code public class MainActivity extends Activity implements LoaderManager.LoaderCallbacks<Cursor> { @Override public void onCreate(Bundle...

Updating DB from onLoadFinished calls onLoadFinished again and again

android,cursor,android-contentprovider,loader,android-cursorloader
I have a situation in which I need to insert a row at a date and update all the entries after a particular date in an Activity For this, I thought I'll load the entries after the date with a LoaderManager Callback and use a ContentProviderOperation array to update all...

SQLite data to a RecyclerView

android,android-sqlite,android-contentprovider,recyclerview,android-cursorloader
The app has data in a SQLite database. The UI is primarily a RecyclerView. The question is how to best to transfer data from the database into the UI, whilst keeping off the main thread? I originally planned to use a CursorLoader, ContentProvider, and RecyclerView. But reading around it looks...