android-cursorloader

Confused about CursorLoaders and using them with a custom SQLiteOpenHelper

大兔子大兔子 提交于 2019-12-05 08:38:56
I'm writing an app that allows people to set alarms for various tasks that they need to do. My current plan is to store all the relevant data into an SQLite database. To that end, I have created a class that extends SQLiteOpenHelper and filled it with methods to handle all the CRUD that I'd expect to have to take in. Knowing that it's generally a bad idea to do all the processing on one thread, I looked up ways to separate the work between threads and found CursorLoader and LoaderManager, which seemed ideal as they were available in the Android Compatibility Library. However, LoaderManager

CursorLoader and Finalizing cursor that has not been deactivated or closed error

烈酒焚心 提交于 2019-12-04 21:46:45
In my activity I have 2 CursorLoader and 2 TextView with a OnClickListener that calls the setScreen() method. Clicking the Textviews sometimes I have the error 11-29 15:27:26.045: INFO/dalvikvm(1223): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43c02e18 on MAIN_TABLE that has not been deactivated or closed 11-29 15:27:26.045: INFO/dalvikvm(1223): at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596) 11-29 15:27:26.045: INFO/dalvikvm(1223): at dalvik.system.NativeStart.run(Native Method) 11-29 15:27:26.065: INFO/dalvikvm(1223):

Android CursorLoader and LoaderManager Error

自作多情 提交于 2019-12-04 21:34:36
I am trying to implement a CursorLoader and LoaderManager on a min API of 10. However, I keep getting an IllegalArgument Exception on Line 63 of AsyncTaskLoader.class (The source Code of the AsyncTaskLoader.class where the exception is happening is Below and at this link . /* Runs on the UI thread */ @Override protected void onPostExecute(D data) { if (DEBUG) Log.v(TAG, this + " onPostExecute"); try { AsyncTaskLoader.this.dispatchOnLoadComplete(this, data); } finally { done.countDown(); } } Below is the stack upon the error: AsyncTaskLoader$LoadTask.onPostExecute(Object) line: 63

Android DBFlow and CursorLoader

…衆ロ難τιáo~ 提交于 2019-12-04 21:31:29
Anyone knows how to use cursorLoader with DBFlow ? I seen this issue but this is not added to DBFlow. Thanks. You can find official docs here or you can implement it the way i have DBFlow ver used 3 //I have edited my answer & provided easier way for content provider part below add this to manifest inside application <provider android:authorities="com.hashx19.pristinekashmir.mycontentprovider" android:exported="false" android:name=".MyContentProvider"/> Create java file named MyContentProvider & copy below code in it & replace AUTHORITY ,ENDPOINT, AppDatabase(Your database name)

Using pagination with CursorLoader and MergeCursor closes old cursors

早过忘川 提交于 2019-12-04 18:08:49
As the title says, when trying to paginate a ListView backed by a SimpleCursorAdapter and a CursorLoader , old cursors are getting closed, thus the below exception is being thrown. The first 2 pages load just fine (the first isn't using the MergeCursor and the second page is the first one to use the MergeCursor ). I don't call any close() on any cursor whatsoever. What is interesting is that while debugging, I cannot see the closed flags on any cursor being set as true, for what it's worth. Might be an issue with the MergeCursor then. Let me know if you guys have any solutions, I'm out of

Using CursorLoader to query SQLite DB and populate AutoCompleteTextView

橙三吉。 提交于 2019-12-04 16:29:37
问题 I have a SQLite database I would like to query. I want to target Android 2.2 through ICS. I came across this article on how to do this, but it uses deprecated code (does not query asynchronously, but on the UI thread). I've since read that I can use CursorLoader along with LoaderManager to do this task the preferred, best practices way (as to not bog down the UI thread). The problem is finding a concise example to explain to me how to do this. 1) Load the database, 2) query it, 3) use the

Query directory with CursorLoader

你离开我真会死。 提交于 2019-12-04 15:02:22
So this has been keeping me busy all day. I am customizing a gallery in which the user can select one or multiple images, for which I am using an existing project which makes use of a CursorLoader . Almost every project uses the media gallery URI to query all images on the memory. However, I only want a specific directory to be scanned and the images within displayed. Few lines of code which do partly what I want: final String imagesDirectory = "/storage/sdcard0/DCIM/" String selection = MediaStore.Images.Media.DATA + " LIKE '" + imagesDirectory + "%'"; cl = new CursorLoader

IllegalStateException - Support LoaderManager with AutocompleteTextView

∥☆過路亽.° 提交于 2019-12-04 06:41:27
One of the benefits I thought of using CursorLoaders and Loadermanagers was that you didn't need to manually manage the lifecycle of the cursor. So I used a loadermanager to bind an adapter to an AutoCompleteTextView using the support package. It works quite well except that it randomly throws an error saying "IllegalStateException - attempt to re-open an already closed object". Surely that's not supposed to happen if we're using the loader manager? Here's the code: package com.bhagwad.tennis; import android.appwidget.AppWidgetManager; import android.content.Intent; import android.database

Handle CursorLoader exceptions

我的未来我决定 提交于 2019-12-04 05:53:01
I have a Fragment implementing LoaderManager and using CursorLoader (nothing fancy). I want to catch exceptions thrown during the query but I don't see how!!! Any help? Thx. jsmith You would need to derive from CursorLoader to do it. Something like this: class MyCursorLoader extends CursorLoader { public MyCursorLoader(Context context) { super(context) } public CursorLoader(Context context, Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { super(context, uri, projection, selection, selectionArgs, sortOrder); } @Override public Cursor loadInBackground()

What is the advantage of loaders over Asynctask in Android?

萝らか妹 提交于 2019-12-04 02:52:11
Are there any advantages of Loaders over Async task? Also, how to make loaders compatible for phones with Android froyo. Edit: The primary problem here is that I'm not using the native DB(SqlLite). Using the DB on development server. Obviously, I can't use CursorLoader any more. AsyncTaskLoader has no examples at all. If any, please do link. Is it a better idea to load the data required onto the local DB and then query it using CursorLoader ? Yes, Loaders are more advantageous than AsyncTask as they take care of a lot of things that AsyncTask falls short of, miserably. Screen Orientation