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#155: Refactored: Moved singleton of MediaContent2DBUpdateService fro…
…m AndroFotoFinderApp to MediaContent2DBUpdateService
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83 changes: 83 additions & 0 deletions
83
app/src/main/java/de/k3b/android/androFotoFinder/queries/GlobalMediaContentObserver.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * Copyright (c) 2020 by k3b. | ||
| * | ||
| * This file is part of AndroFotoFinder / #APhotoManager. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | ||
| * FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| * for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License along with | ||
| * this program. If not, see <http://www.gnu.org/licenses/> | ||
| */ | ||
| package de.k3b.android.androFotoFinder.queries; | ||
|
|
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| import android.content.Context; | ||
| import android.database.ContentObserver; | ||
| import android.net.Uri; | ||
| import android.os.Handler; | ||
| import android.util.Log; | ||
|
|
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| import de.k3b.android.util.DataChangeNotifyer; | ||
|
|
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| /** | ||
| * collect notifications that media content has changed | ||
| */ | ||
| public class GlobalMediaContentObserver extends ContentObserver { | ||
| private static GlobalMediaContentObserver instance = null; | ||
| private static Handler delayedChangeNotifiyHandler = null; | ||
| private static Runnable delayedRunner = null; | ||
| private static Context appContext; | ||
| private static DataChangeNotifyer.DataChangedListener dataChangedListener = null; | ||
|
|
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| private GlobalMediaContentObserver() { | ||
| super(null); | ||
| } | ||
|
|
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| public static GlobalMediaContentObserver getInstance(Context appContext) { | ||
| if (instance == null) { | ||
| GlobalMediaContentObserver.appContext = appContext; | ||
|
|
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| delayedRunner = new Runnable() { | ||
| public void run() { | ||
| onExternalDataChangeCompleted(appContext); | ||
|
|
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| } | ||
| }; | ||
| delayedChangeNotifiyHandler = new Handler(); | ||
| instance = new GlobalMediaContentObserver(); | ||
| } | ||
| return instance; | ||
| } | ||
|
|
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| @Override | ||
| public void onChange(boolean selfChange, Uri uri) { | ||
| super.onChange(selfChange, uri); | ||
| if (!selfChange) { | ||
| Log.d(MediaDBRepository.LOG_TAG, "Media content changing " + uri); | ||
|
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| delayedChangeNotifiyHandler.removeCallbacks(delayedRunner); | ||
| delayedChangeNotifiyHandler.postDelayed(delayedRunner, 500); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * called in gui thread after external media-content changes are completed | ||
| * | ||
| * @param appContext | ||
| */ | ||
| private void onExternalDataChangeCompleted(Context appContext) { | ||
| Log.d(MediaDBRepository.LOG_TAG, "Media content changed "); | ||
| // todo fix database | ||
|
|
||
| if (dataChangedListener != null) { | ||
| dataChangedListener.onNotifyDataChanged(); | ||
| } | ||
| } | ||
| } |
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