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DBStatusManager.java
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DBStatusManager.java
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/*
BusTO - Backend components
Copyright (C) 2019 Fabio Mazza
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 it.reyboz.bustorino.backend;
import android.content.Context;
import android.content.SharedPreferences;
import android.util.Log;
import it.reyboz.bustorino.R;
/**
* Class to handle app status modifications, e.g. database is being updated or not
*/
public class DBStatusManager {
private static String PREFERENCES_NAME;// = "it.reyboz.bustorino.statusPreferences";
private String DB_UPDATING;
private SharedPreferences preferences;
private SharedPreferences.OnSharedPreferenceChangeListener prefListener;
private OnDBUpdateStatusChangeListener dbUpdateListener;
public DBStatusManager(Context context, OnDBUpdateStatusChangeListener listener) {
Context thecon = context.getApplicationContext();
this.preferences = thecon.getSharedPreferences(context.getString(R.string.mainSharedPreferences),Context.MODE_PRIVATE);
DB_UPDATING = context.getString(R.string.databaseUpdatingPref);
PREFERENCES_NAME = context.getString(R.string.mainSharedPreferences);
dbUpdateListener = listener;
//this.prefListeners = new ArrayList<>();
prefListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
Log.d("BUSTO-PrefListener", "Changed key " + key + " in the sharedPref");
if (dbUpdateListener!=null && key.equals(DB_UPDATING)) {
dbUpdateListener.onDBStatusChanged(sharedPreferences.getBoolean(DB_UPDATING, dbUpdateListener.defaultStatusValue()));
}
}
};
}
public boolean isDBUpdating(boolean defaultvalue){
if (preferences == null) //preferences = thecon.getSharedPreferences(PREFERENCES_NAME,Context.MODE_PRIVATE);
{
//This should NOT HAPPEN
Log.e("BUSTO_Pref","Preference reference is null");
return false;
} else {
return preferences.getBoolean(DB_UPDATING,defaultvalue);
}
}
public void registerListener(){
if(prefListener!=null)
preferences.registerOnSharedPreferenceChangeListener(prefListener);
}
public void unregisterListener(){
if(prefListener!=null)
preferences.unregisterOnSharedPreferenceChangeListener(prefListener);
}
public void setDbUpdating(boolean value){
final SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean(DB_UPDATING,value);
editor.apply();
}
public interface OnDBUpdateStatusChangeListener {
void onDBStatusChanged(boolean updating);
boolean defaultStatusValue();
}
}

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