关于android：Loadermanager onLoadFinished没有调用

Loadmanager onLoadFinished not called

我正试图用loaderCallbacks从数据库加载数据。但不会调用LoaderCallbacks中的OnLoadFinished函数。因此，正如您在日志中看到的那样，返回的行数为1，但列表中没有显示任何条目，而且也没有如您所看到的那样调用OnLoadFinished。

血清碎片

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public class SerieFragment extends SherlockListFragment implements
LoaderCallbacks {

private SimpleCursorAdapter adapter;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

String[] from = new String[] { DBContract.Episodes.NAME };
int[] to = new int[] { R.id.name };

Log.i("LoaderManager","Starting...");
getLoaderManager().initLoader(0, null, this);

adapter = new SimpleCursorAdapter(getActivity(),
R.layout.serie_list_item, null, from, to, 0);

this.setListAdapter(adapter);
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {

}

@Override
public Loader onCreateLoader(int id, Bundle args) {
Log.i("LoaderManager","Creating loader...");

String[] projection = { DBContract.Episodes._ID,
DBContract.Episodes.NAME };
CursorLoader cursorLoader = new CursorLoader(this.getActivity(),
Uri.parse(SerieProvider.CONTENT_URI +"/episodes"), projection,
null, null, null);
return cursorLoader;
}

@Override
public void onLoadFinished(Loader loader, Cursor cursor) {
Log.i("LoaderManager",
"Finished load entry... - Cursor:" + cursor.getCount());
adapter.swapCursor(cursor);
}

@Override
public void onLoaderReset(Loader loader) {
Log.i("LoaderManager","Resetting loader...");
adapter.swapCursor(null);
}

内容提供者

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public class SerieProvider extends ContentProvider {

private static DatabaseHelper database;
private static final String PROVIDER ="com.drizzlyday.apps.episotron.providers";
private static final String BASE_PATH ="serieprovider";
public static final Uri CONTENT_URI = Uri.parse("content://" + PROVIDER
+"/" + BASE_PATH);

public static final int SERIES = 1;
public static final int EPISODES = 2;

private static final UriMatcher uriMatcher;
static {
uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
uriMatcher.addURI(PROVIDER, BASE_PATH, SERIES);
uriMatcher.addURI(PROVIDER, BASE_PATH +"/episodes", EPISODES);
}

@Override
public boolean onCreate() {
database = new DatabaseHelper(getContext());
return false;
}

@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}

@Override
public String getType(Uri uri) {
// TODO Auto-generated method stub
return null;
}

@Override
public Uri insert(Uri uri, ContentValues values) {
// TODO Auto-generated method stub
return null;
}

@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {

Log.d("Provider", uri.toString());
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();

int uriType = uriMatcher.match(uri);
switch (uriType) {
case SERIES:
Log.d("Provider","Series");
queryBuilder.setTables(DBContract.Series.TABLE_NAME);
break;
case EPISODES:
Log.d("Provider","Episodes");
queryBuilder.setTables(DBContract.Episodes.TABLE_NAME);
break;
default:
throw new IllegalArgumentException("Unknown URI:" + uri);
}

SQLiteDatabase db = database.getReadableDatabase();
SQLiteCursor cursor = (SQLiteCursor) queryBuilder.query(db, projection,
selection, selectionArgs, null, null, sortOrder);
cursor.setNotificationUri(getContext().getContentResolver(), uri);

Log.d("Provider","Cursor:" + cursor.toString()
+" - Columncount:" + cursor.getColumnCount()
+" - Rowcount:" + cursor.getCount());

return cursor;
}

@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}

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05-05 23:34:30.855: I/ActivityThread(31903): Pub com.drizzlyday.apps.episotron.providers: com.drizzlyday.apps.episotron.providers.SerieProvider
05-05 23:34:31.035: D/Serie(31903): New Serie fragment
05-05 23:34:31.040: I/LoaderManager(31903): Starting...
05-05 23:34:31.040: I/LoaderManager(31903): Creating loader...
05-05 23:34:31.055: D/AbsListView(31903): Get MotionRecognitionManager
05-05 23:34:31.060: D/AbsListView(31903): Get MotionRecognitionManager
05-05 23:34:31.080: D/dalvikvm(31903): GC_CONCURRENT freed 174K, 8% free 12340K/13383K, paused 2ms+2ms, total 16ms
05-05 23:34:31.090: D/Provider(31903): content://com.drizzlyday.apps.episotron.providers/serieprovider/episodes
05-05 23:34:31.090: D/Provider(31903): Episodes
05-05 23:34:31.100: V/SlidingMenu(31903): setting padding!
05-05 23:34:31.160: D/libEGL(31903): loaded /system/lib/egl/libEGL_mali.so
05-05 23:34:31.175: D/libEGL(31903): loaded /system/lib/egl/libGLESv1_CM_mali.so
05-05 23:34:31.175: D/libEGL(31903): loaded /system/lib/egl/libGLESv2_mali.so
05-05 23:34:31.180: D/(31903): Device driver API match
05-05 23:34:31.180: D/(31903): Device driver API version: 10
05-05 23:34:31.180: D/(31903): User space API version: 10
05-05 23:34:31.180: D/(31903): mali: REVISION=Linux-r2p4-02rel0 BUILD_DATE=Tue Oct 16 15:37:13 KST 2012
05-05 23:34:31.210: D/OpenGLRenderer(31903): Enabling debug mode 0
05-05 23:34:31.215: V/CustomViewBehind(31903): behind INVISIBLE
05-05 23:34:31.260: D/Provider(31903): Cursor: android.database.sqlite.SQLiteCursor@41b0df88 - Columncount: 2 - Rowcount: 1

我发现了问题。必须添加以下行以刷新列表的可绘制状态：

1	this.getListView().refreshDrawableState();