/*
* Copyright (c) 2012 CommonsWare, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.commonsware.cwac.loaderex;
import android.content.AsyncTaskLoader;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Build;
import android.preference.PreferenceManager;
public class SharedPreferencesLoader extends
AsyncTaskLoader<SharedPreferences> implements
SharedPreferences.OnSharedPreferenceChangeListener {
private SharedPreferences prefs=null;
public static void persist(final SharedPreferences.Editor editor) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
editor.apply();
}
else {
new Thread() {
public void run() {
editor.commit();
}
}.run();
}
}
public SharedPreferencesLoader(Context context) {
super(context);
}
/**
* Runs on a worker thread, loading in our data.
*/
@Override
public SharedPreferences loadInBackground() {
prefs=PreferenceManager.getDefaultSharedPreferences(getContext());
prefs.registerOnSharedPreferenceChangeListener(this);
return(prefs);
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
String key) {
onContentChanged();
}
/**
* Starts an asynchronous load of the list data. When the
* result is ready the callbacks will be called on the UI
* thread. If a previous load has been completed and is
* still valid the result may be passed to the callbacks
* immediately.
*
* Must be called from the UI thread.
*/
@Override
protected void onStartLoading() {
if (prefs != null) {
deliverResult(prefs);
}
if (takeContentChanged() || prefs == null) {
forceLoad();
}
}
}