Java Code Examples for android.database.Cursor#unregisterContentObserver()
The following examples show how to use
android.database.Cursor#unregisterContentObserver() .
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Example 1
| Source File: CursorAdapter.java From adt-leanback-support with Apache License 2.0 | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 2
| Source File: CursorAdapter.java From CodenameOne with GNU General Public License v2.0 | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 3
| Source File: CursorAdapter.java From android-recipes-app with Apache License 2.0 | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 4
| Source File: BaseAbstractRecycleCursorAdapter.java From AppCodeArchitecture with Apache License 2.0 | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(android.database.Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetChanged();
}
return oldCursor;
}
Example 5
| Source File: CursorAdapter.java From android_9.0.0_r45 with Apache License 2.0 | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there was not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 6
| Source File: CursorAdapter.java From guideshow with MIT License | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 7
| Source File: CircularViewCursorAdapter.java From CircularView with Apache License 2.0 | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there was not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 8
| Source File: CursorAdapter.java From V.FlyoutTest with MIT License | 6 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 9
| Source File: RecyclerViewCursorBaseAdapter.java From HightCopyWX with Apache License 2.0 | 5 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
// notifyDataSetInvalidated();
//there is no notifyDataSetInvalidated method we should use notifyDataSetChanged method;
notifyDataSetChanged();
}
return oldCursor;
}
Example 10
| Source File: CursorRecyclerAdapter.java From yahnac with Apache License 2.0 | 5 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) {
oldCursor.unregisterContentObserver(mChangeObserver);
}
if (mDataSetObserver != null) {
oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) {
newCursor.registerContentObserver(mChangeObserver);
}
if (mDataSetObserver != null) {
newCursor.registerDataSetObserver(mDataSetObserver);
}
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
// notifyDataSetInvalidated();
notifyItemRangeRemoved(0, getItemCount());
}
return oldCursor;
}
Example 11
| Source File: CursorRecyclerAdapter.java From Ouroboros with GNU General Public License v3.0 | 5 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
// notifyDataSetInvalidated();
notifyItemRangeRemoved(0, getItemCount());
}
return oldCursor;
}
Example 12
| Source File: CursorAdapter.java From ExRecyclerViewLibrary with Apache License 2.0 | 5 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetChanged();
// notifyDataSetInvalidated();
}
return oldCursor;
}
Example 13
| Source File: MediaStoreCursorRecyclerAdapter.java From libcommon with Apache License 2.0 | 5 votes |
|
/**
* カーソルを交換
* @param newCursor
* @return
*/
@Nullable
protected Cursor swapCursor(@Nullable final Cursor newCursor) {
if (DEBUG) Log.v(TAG, "swapCursor:" + newCursor);
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) {
oldCursor.unregisterContentObserver(mChangeObserver);
}
if (mDataSetObserver != null) {
oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
}
synchronized (mSync) {
mCursor = newCursor;
}
if (newCursor != null) {
if (mChangeObserver != null) {
newCursor.registerContentObserver(mChangeObserver);
}
if (mDataSetObserver != null) {
newCursor.registerDataSetObserver(mDataSetObserver);
}
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetInvalidated();
}
return oldCursor;
}
Example 14
| Source File: CursorAdapter.java From letv with Apache License 2.0 | 5 votes |
|
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == this.mCursor) {
return null;
}
Cursor oldCursor = this.mCursor;
if (oldCursor != null) {
if (this.mChangeObserver != null) {
oldCursor.unregisterContentObserver(this.mChangeObserver);
}
if (this.mDataSetObserver != null) {
oldCursor.unregisterDataSetObserver(this.mDataSetObserver);
}
}
this.mCursor = newCursor;
if (newCursor != null) {
if (this.mChangeObserver != null) {
newCursor.registerContentObserver(this.mChangeObserver);
}
if (this.mDataSetObserver != null) {
newCursor.registerDataSetObserver(this.mDataSetObserver);
}
this.mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
this.mDataValid = true;
notifyDataSetChanged();
return oldCursor;
}
this.mRowIDColumn = -1;
this.mDataValid = false;
notifyDataSetInvalidated();
return oldCursor;
}
Example 15
| Source File: CursorRecyclerAdapter.java From android-atleap with Apache License 2.0 | 5 votes |
|
/**
* Swap in a new Cursor, returning the old Cursor. Unlike
* {@link #changeCursor(Cursor)}, the returned old Cursor is <em>not</em>
* closed.
*
* @param newCursor The new cursor to be used.
* @return Returns the previously set Cursor, or null if there wasa not one.
* If the given new Cursor is the same instance is the previously set
* Cursor, null is also returned.
*/
public Cursor swapCursor(Cursor newCursor) {
if (newCursor == mCursor) {
return null;
}
Cursor oldCursor = mCursor;
if (oldCursor != null) {
if (mChangeObserver != null) oldCursor.unregisterContentObserver(mChangeObserver);
if (mDataSetObserver != null) oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
mCursor = newCursor;
if (newCursor != null) {
if (mChangeObserver != null) newCursor.registerContentObserver(mChangeObserver);
if (mDataSetObserver != null) newCursor.registerDataSetObserver(mDataSetObserver);
mRowIDColumn = newCursor.getColumnIndexOrThrow("_id");
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
} else {
mRowIDColumn = -1;
mDataValid = false;
// notify the observers about the lack of a data set
notifyDataSetChanged();
//notifyDataSetInvalidated();
}
return oldCursor;
}
Example 16
| Source File: FavLoader.java From CSipSimple with GNU General Public License v3.0 | 5 votes |
|
/**
* Helper function to take care of releasing resources associated with an
* actively loaded data set.
*/
protected void onReleaseResources(Cursor c) {
if(c != null) {
c.unregisterContentObserver(loaderObserver);
c.close();
}
getContext().getContentResolver().unregisterContentObserver(loaderObserver);
}
Example 17
| Source File: AccountsLoader.java From CSipSimple with GNU General Public License v3.0 | 5 votes |
|
/**
* Helper function to take care of releasing resources associated with an
* actively loaded data set.
*/
protected void onReleaseResources(Cursor c) {
if(c != null) {
c.unregisterContentObserver(loaderObserver);
c.close();
}
if(loadStatus) {
getContext().getContentResolver().unregisterContentObserver(loaderObserver);
}
}
Example 18
| Source File: QueryResult.java From arca-android with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
public void unregisterContentObserver(final ContentObserver observer) {
final Cursor cursor = getData();
if (cursor != null) {
cursor.unregisterContentObserver(observer);
}
}
Example 19
| Source File: TestProvider.java From Popular-Movies-App with Apache License 2.0 | 4 votes |
|
public void testUpdateMovie() {
ContentValues testValues = TestUtilities.createTestMovieValues();
Uri movieUri = mContext.getContentResolver().insert(MoviesContract.MovieEntry.CONTENT_URI, testValues);
assertTrue(movieUri != null);
long movieId = ContentUris.parseId(movieUri);
assertTrue(movieId != -1);
assertEquals(movieUri, MoviesContract.MovieEntry.buildMovieUri(movieId));
ContentValues updatedValues = new ContentValues(testValues);
updatedValues.put(MoviesContract.MovieEntry._ID, movieId);
updatedValues.put(MoviesContract.MovieEntry.COLUMN_VOTE_COUNT, 100500);
// Create a cursor with observer to make sure that the content provider is notifying
// the observers as expected
Cursor movies = mContext.getContentResolver().query(
MoviesContract.MovieEntry.CONTENT_URI,
null,
null,
null,
null);
assertTrue(movies != null);
TestUtilities.TestContentObserver moviesObserver = TestUtilities.getTestContentObserver();
movies.registerContentObserver(moviesObserver);
TestUtilities.TestContentObserver movieByIdObserver = TestUtilities.getTestContentObserver();
mContext.getContentResolver().registerContentObserver(movieUri, true, movieByIdObserver);
int count = mContext.getContentResolver().update(
MoviesContract.MovieEntry.CONTENT_URI, updatedValues,
MoviesContract.MovieEntry._ID + "= ?", new String[]{Long.toString(movieId)});
assertEquals(1, count);
// Test to make sure our observer is called.
moviesObserver.waitForNotificationOrFail();
movies.unregisterContentObserver(moviesObserver);
movies.close();
movieByIdObserver.waitForNotificationOrFail();
mContext.getContentResolver().unregisterContentObserver(movieByIdObserver);
// A cursor is your primary interface to the query results.
Cursor cursor = mContext.getContentResolver().query(
MoviesContract.MovieEntry.CONTENT_URI,
null, // projection
MoviesContract.MovieEntry._ID + " = " + movieId,
null, // Values for the "where" clause
null // sort order
);
assertTrue(cursor != null);
TestUtilities.validateCursor("testUpdateMovie. Error validating movie entry update.",
cursor, updatedValues);
cursor.close();
}
Example 20
| Source File: MediaStoreRecyclerAdapter.java From libcommon with Apache License 2.0 | 4 votes |
|
/**
* カーソルを交換
* @param newCursor
* @return
*/
@Nullable
protected Cursor swapCursor(@Nullable final Cursor newCursor) {
if (DEBUG) Log.v(TAG, "swapCursor:" + newCursor);
Cursor oldCursor;
synchronized (mValues) {
if (newCursor == mCursor) {
return null;
}
oldCursor = mCursor;
}
if (oldCursor != null) {
if (mChangeObserver != null) {
oldCursor.unregisterContentObserver(mChangeObserver);
}
if (mDataSetObserver != null) {
oldCursor.unregisterDataSetObserver(mDataSetObserver);
}
}
if (newCursor != null) {
if (mChangeObserver != null) {
newCursor.registerContentObserver(mChangeObserver);
}
if (mDataSetObserver != null) {
newCursor.registerDataSetObserver(mDataSetObserver);
}
final List<MediaInfo> removes = new ArrayList<>();
final List<Integer> adds = new ArrayList<>();
if (newCursor.moveToFirst()) {
int pos = 0;
do {
info.loadFromCursor(newCursor);
if (DEBUG) Log.v(TAG, "swapCursor:" + info);
if (!mNeedValidate || info.canRead(mCr)) {
adds.add(pos);
} else {
removes.add(new MediaInfo(info));
}
pos++;
} while (newCursor.moveToNext());
}
synchronized (mValues) {
mValues.clear();
mValues.addAll(adds);
mCursor = newCursor;
}
mDataValid = true;
// notify the observers about the new cursor
notifyDataSetChanged();
if (false) {
// 読み込めないのがあれば削除を試みる
if (!removes.isEmpty()) {
for (final MediaInfo item: removes) {
try {
if(DEBUG) Log.v(TAG, "try to delete " + info);
mCr.delete(item.getUri(), null, null);
} catch (final Exception e) {
Log.w(TAG, "failed to delete " + item, e);
}
}
}
}
} else {
mDataValid = false;
// notify the observers about the lack of a data set
synchronized (mValues) {
mValues.clear();
mCursor = null;
}
notifyDataSetInvalidated();
}
return oldCursor;
}
