本文整理匯總了Java中android.database.ContentObserver.onChange方法的典型用法代碼示例。如果您正苦於以下問題：Java ContentObserver.onChange方法的具體用法？Java ContentObserver.onChange怎麽用？Java ContentObserver.onChange使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類android.database.ContentObserver的用法示例。
在下文中一共展示了ContentObserver.onChange方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: onCreate
import android.database.ContentObserver; //導入方法依賴的package包/類
@Override
public void onCreate(@NonNull final LifecycleOwner owner) {
// Set up a ContentObserver to update widgets whenever the artwork changes
mWidgetContentObserver = new ContentObserver(new Handler()) {
@Override
public void onChange(final boolean selfChange, final Uri uri) {
new AppWidgetUpdateTask(mContext, false)
.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}
};
mContext.getContentResolver().registerContentObserver(MuzeiContract.Artwork.CONTENT_URI,
true, mWidgetContentObserver);
mContext.getContentResolver().registerContentObserver(MuzeiContract.Sources.CONTENT_URI,
true, mWidgetContentObserver);
// Update the widget now that the wallpaper is active to enable the 'Next' button if supported
mWidgetContentObserver.onChange(true);
}
示例2: testTracksTableUpdate
import android.database.ContentObserver; //導入方法依賴的package包/類
/**
* Tests registering for tracks table update.
*/
public void testTracksTableUpdate() {
// Register two listeners
Capture<ContentObserver> contentObserverCapture = new Capture<ContentObserver>();
Track track = new Track();
expect(myTracksProviderUtils.getTrack(TRACK_ID)).andStubReturn(track);
dataSource.registerContentObserver(
eq(TracksColumns.CONTENT_URI), capture(contentObserverCapture));
trackDataListener1.onTrackUpdated(track);
trackDataListener2.onTrackUpdated(track);
replay();
trackDataHub.start();
trackDataHub.loadTrack(TRACK_ID);
trackDataHub.registerTrackDataListener(
trackDataListener1, EnumSet.of(TrackDataType.TRACKS_TABLE));
trackDataHub.registerTrackDataListener(
trackDataListener2, EnumSet.of(TrackDataType.TRACKS_TABLE));
verifyAndReset();
// Causes tracks table update
ContentObserver contentObserver = contentObserverCapture.getValue();
expect(myTracksProviderUtils.getTrack(TRACK_ID)).andStubReturn(track);
trackDataListener1.onTrackUpdated(track);
trackDataListener2.onTrackUpdated(track);
replay();
contentObserver.onChange(false);
verifyAndReset();
// Unregister one listener
expect(myTracksProviderUtils.getTrack(TRACK_ID)).andStubReturn(track);
trackDataListener2.onTrackUpdated(track);
replay();
trackDataHub.unregisterTrackDataListener(trackDataListener1);
contentObserver.onChange(false);
verifyAndReset();
// Unregister the second listener
dataSource.unregisterContentObserver(contentObserver);
replay();
trackDataHub.unregisterTrackDataListener(trackDataListener2);
contentObserver.onChange(false);
verifyAndReset();
}
示例3: testTrackPointsTableUpdate
import android.database.ContentObserver; //導入方法依賴的package包/類
/**
* Tests track points table update.
*/
public void testTrackPointsTableUpdate() {
// Register one listener
Capture<ContentObserver> contentObserverCapture = new Capture<ContentObserver>();
dataSource.registerContentObserver(
eq(TrackPointsColumns.CONTENT_URI), capture(contentObserverCapture));
FixedSizeLocationIterator locationIterator = new FixedSizeLocationIterator(1, 10, 5);
expect(myTracksProviderUtils.getTrackPointLocationIterator(
eq(TRACK_ID), eq(0L), eq(false), isA(LocationFactory.class))).andReturn(locationIterator);
expect(myTracksProviderUtils.getLastTrackPointId(TRACK_ID)).andReturn(10L);
trackDataListener1.clearTrackPoints();
locationIterator.expectLocationsDelivered(trackDataListener1);
trackDataListener1.onNewTrackPointsDone();
replay();
trackDataHub.start();
trackDataHub.loadTrack(TRACK_ID);
trackDataHub.registerTrackDataListener(
trackDataListener1, EnumSet.of(TrackDataType.SAMPLED_IN_TRACK_POINTS_TABLE));
verifyAndReset();
// Register a second listener
locationIterator = new FixedSizeLocationIterator(1, 10, 5);
expect(myTracksProviderUtils.getTrackPointLocationIterator(
eq(TRACK_ID), eq(0L), eq(false), isA(LocationFactory.class))).andReturn(locationIterator);
expect(myTracksProviderUtils.getLastTrackPointId(TRACK_ID)).andReturn(10L);
trackDataListener2.clearTrackPoints();
locationIterator.expectLocationsDelivered(trackDataListener2);
trackDataListener2.onNewTrackPointsDone();
replay();
trackDataHub.registerTrackDataListener(
trackDataListener2, EnumSet.of(TrackDataType.SAMPLED_IN_TRACK_POINTS_TABLE));
verifyAndReset();
// Deliver more points - should go to both listeners without clearing
ContentObserver contentObserver = contentObserverCapture.getValue();
locationIterator = new FixedSizeLocationIterator(11, 10, 1);
expect(myTracksProviderUtils.getTrackPointLocationIterator(
eq(TRACK_ID), eq(11L), eq(false), isA(LocationFactory.class))).andReturn(locationIterator);
expect(myTracksProviderUtils.getLastTrackPointId(TRACK_ID)).andReturn(20L);
locationIterator.expectLocationsDelivered(trackDataListener1);
locationIterator.expectLocationsDelivered(trackDataListener2);
trackDataListener1.onNewTrackPointsDone();
trackDataListener2.onNewTrackPointsDone();
replay();
contentObserver.onChange(false);
verifyAndReset();
// Unregister one listener and change track
locationIterator = new FixedSizeLocationIterator(101, 10);
expect(myTracksProviderUtils.getTrackPointLocationIterator(
eq(TRACK_ID + 1), eq(0L), eq(false), isA(LocationFactory.class)))
.andReturn(locationIterator);
expect(myTracksProviderUtils.getLastTrackPointId(TRACK_ID + 1)).andReturn(110L);
trackDataListener2.clearTrackPoints();
locationIterator.expectLocationsDelivered(trackDataListener2);
trackDataListener2.onNewTrackPointsDone();
replay();
trackDataHub.unregisterTrackDataListener(trackDataListener1);
trackDataHub.loadTrack(TRACK_ID + 1);
verifyAndReset();
}
示例4: testTrackPointsTableUpdate_resampling
import android.database.ContentObserver; //導入方法依賴的package包/類
/**
* Tests track points table update with resampling.
*/
public void testTrackPointsTableUpdate_resampling() {
Capture<ContentObserver> observerCapture = new Capture<ContentObserver>();
dataSource.registerContentObserver(
eq(TrackPointsColumns.CONTENT_URI), capture(observerCapture));
// Deliver 30 points (no sampling happens)
FixedSizeLocationIterator locationIterator = new FixedSizeLocationIterator(1, 30, 5);
expect(myTracksProviderUtils.getTrackPointLocationIterator(
eq(TRACK_ID), eq(0L), eq(false), isA(LocationFactory.class))).andReturn(locationIterator);
expect(myTracksProviderUtils.getLastTrackPointId(TRACK_ID)).andReturn(30L);
trackDataListener1.clearTrackPoints();
locationIterator.expectLocationsDelivered(trackDataListener1);
trackDataListener1.onNewTrackPointsDone();
replay();
trackDataHub.start();
trackDataHub.loadTrack(TRACK_ID);
trackDataHub.registerTrackDataListener(
trackDataListener1, EnumSet.of(TrackDataType.SAMPLED_IN_TRACK_POINTS_TABLE));
verifyAndReset();
// Now deliver 30 more (incrementally sampled)
ContentObserver observer = observerCapture.getValue();
locationIterator = new FixedSizeLocationIterator(31, 30);
expect(myTracksProviderUtils.getTrackPointLocationIterator(
eq(TRACK_ID), eq(31L), eq(false), isA(LocationFactory.class))).andReturn(locationIterator);
expect(myTracksProviderUtils.getLastTrackPointId(TRACK_ID)).andReturn(60L);
locationIterator.expectSampledLocationsDelivered(trackDataListener1, 2, false);
trackDataListener1.onNewTrackPointsDone();
replay();
observer.onChange(false);
verifyAndReset();
// Now another 30 (triggers resampling)
locationIterator = new FixedSizeLocationIterator(1, 90);
expect(myTracksProviderUtils.getTrackPointLocationIterator(
eq(TRACK_ID), eq(0L), eq(false), isA(LocationFactory.class))).andReturn(locationIterator);
expect(myTracksProviderUtils.getLastTrackPointId(TRACK_ID)).andReturn(90L);
trackDataListener1.clearTrackPoints();
locationIterator.expectSampledLocationsDelivered(trackDataListener1, 2, false);
trackDataListener1.onNewTrackPointsDone();
replay();
observer.onChange(false);
verifyAndReset();
}