android-cursorloader

Using CursorLoader with LoaderManager to retrieve images from android apps

由 风流意气都作罢 提交于 2019-11-27 08:18:28
问题 At the moment I’m using getContentResolver().query()/managedQuery() to get a cursor to retrieve images from the gallery app. Because the APIs I’m using are partly deprecated I wanted to use CursorLoader with LoaderManager. /** * Creates a cursor to access the content defined by the image uri for API * version 11 and newer. * * @return The created cursor. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) private Cursor createCursorHoneycomb() { String[] projection = { MediaStore.Images.Media.DATA }

Android eclipse startManagingCursor Deprecated but want to support older API versions?

由 空扰寡人 提交于 2019-11-27 05:54:53
问题 I am trying to understand something, and I am sure it is very basic to some people. I read everywhere that the startManagingCursor method is deprecated and you should use the CursorLoader class. But does that mean that you should use the CursorLoader class even for apps that support API levels < 11? Or is it saying that if you intend to only support Honeycomb and up, THEN use cursorLoader? I don't appear to be able to import the cursor loader class with api 4, so i assume that using

Android 3.0 - what are the advantages of using LoaderManager instances exactly?

由 北城余情 提交于 2019-11-27 05:05:06
问题 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? 回答1: 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

CursorLoader not updating after data change

由 给你一囗甜甜゛ 提交于 2019-11-27 00:17:42
I have created a small application, trying to understand the functionality of the LoaderManager and CursorLoader -classes. I have implemented LoaderCallbacks<Cursor> on my FragmentActivity -class and everything works fine, except the fact that when I update my data via ContentResolver.update() or ContentResolver.insert() -methods, onLoadFinished() is not called and as a result my data doesn't update. I have a custom ContentProvider and I am wondering if the problem is in my ContentProvider not notifying that the data changed or something else. Did you call setNotificationUri(ContentResolver cr

AlphabetIndexer with Custom Adapter managed by LoaderManager

由 ╄→尐↘猪︶ㄣ 提交于 2019-11-26 11:23:19
I am trying to implement AlphabetIndexer with Custom Adapter like this AlphabetIndexer with Custom Adapter My class ContactsCursorAdapter extends SimpleCursorAdapter and implements SectionIndexer and I am using a LoaderManager to manage my adapter's cursor so i have overridden the swapCursor() method like the second answer to the example above indicates. public class ContactsCursorAdapter extends SimpleCursorAdapter implements SectionIndexer{ private LayoutInflater mInflater; private Context mContext; private AlphabetIndexer mAlphaIndexer; public ContactsCursorAdapter(Context context, int

How do CursorLoader automatically updates the view even if the app is inactive?

由 谁都会走 提交于 2019-11-26 10:22:17
问题 I have been working on a small To-Do list app. I used CursorLoader to update the ToDolistview from a content provider. I have a written a function onNewItemAdded() , which is called when user enters a new item in the text view and clicks enter. Refer below: public void onNewItemAdded(String newItem) { ContentResolver cr = getContentResolver(); ContentValues values = new ContentValues(); values.put(ToDoContentProvider.KEY_TASK, newItem); cr.insert(ToDoContentProvider.CONTENT_URI, values); //

AlphabetIndexer with Custom Adapter managed by LoaderManager

由 不羁的心 提交于 2019-11-26 02:23:08
问题 I am trying to implement AlphabetIndexer with Custom Adapter like this AlphabetIndexer with Custom Adapter My class ContactsCursorAdapter extends SimpleCursorAdapter and implements SectionIndexer and I am using a LoaderManager to manage my adapter\'s cursor so i have overridden the swapCursor() method like the second answer to the example above indicates. public class ContactsCursorAdapter extends SimpleCursorAdapter implements SectionIndexer{ private LayoutInflater mInflater; private Context

AutoCompleteTextView backed by CursorLoader

由 天涯浪子 提交于 2019-11-26 00:48:37
问题 So I am having trouble extending the MultiAutoCompleteTextView and backing it with a CursorLoader , while simultaneously using a custom Tokenizer . The issue rises specifically with the mAdapter.setCursorToStringConverter(); call. The convertToString() method which has a Cursor as an argument has a valid and unclosed cursor upon the first call to this method. However subsequent calls result in either a null cursor or a closed cursor. I am guessing this has something to do with how the

SimpleCursorTreeAdapter and CursorLoader for ExpandableListView

由 ≡放荡痞女 提交于 2019-11-26 00:43:47
问题 I am trying to asynchronously query a provider by using a CursorLoader with a SimpleCursorTreeAdapter Here is my Fragment class which implements the CursorLoader public class GroupsListFragment extends ExpandableListFragment implements LoaderManager.LoaderCallbacks<Cursor> { private final String DEBUG_TAG = getClass().getSimpleName().toString(); private static final String[] CONTACTS_PROJECTION = new String[] { ContactsContract.Contacts._ID, ContactsContract.Contacts.DISPLAY_NAME }; private

CursorLoader usage without ContentProvider

由 孤街浪徒 提交于 2019-11-25 23:33:46
问题 Android SDK documentation says that startManagingCursor() method is depracated: This method is deprecated. Use the new CursorLoader class with LoaderManager instead; this is also available on older platforms through the Android compatibility package. This method allows the activity to take care of managing the given Cursor\'s lifecycle for you based on the activity\'s lifecycle. That is, when the activity is stopped it will automatically call deactivate() on the given Cursor, and when it is
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