/*
* Copyright (C) 2012, Katy Hilgenberg.
* Special acknowledgments to: Knowledge & Data Engineering Group, University of Kassel (http://www.kde.cs.uni-kassel.de).
* Contact: sdcf@cs.uni-kassel.de
*
* This file is part of the SDCFramework (Sensor Data Collection Framework) project.
*
* The SDCFramework is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The SDCFramework 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SDCFramework. If not, see <http://www.gnu.org/licenses/>.
*/
package de.unikassel.android.sdcframework.broadcast;
import de.unikassel.android.sdcframework.util.BatteryLowEvent;
import de.unikassel.android.sdcframework.util.ObservableEventSourceImpl;
import de.unikassel.android.sdcframework.util.facade.EventObserver;
import de.unikassel.android.sdcframework.util.facade.LifeCycleObject;
import de.unikassel.android.sdcframework.util.facade.ObservableEventSource;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
/**
* An observable battery low broadcast receiver.
*
* @author Katy Hilgenberg
*/
public class BatteryLowStateObserver
extends BroadcastReceiver
implements ObservableEventSource< BatteryLowEvent >, LifeCycleObject
{
/**
* The observable event source
*/
private final ObservableEventSourceImpl< BatteryLowEvent > eventSource;
/**
* Constructor
*/
public BatteryLowStateObserver()
{
this.eventSource =
new ObservableEventSourceImpl< BatteryLowEvent >();
}
/*
* (non-Javadoc)
*
* @see android.content.BroadcastReceiver#onReceive(android.content.Context,
* android.content.Intent)
*/
@Override
public void onReceive( Context context, Intent intent )
{
if ( eventSource.getObservers().isEmpty() )
return;
if ( Intent.ACTION_BATTERY_LOW.equals( intent.getAction() ) )
{
notify( new BatteryLowEvent() );
}
}
@Override
public void registerEventObserver(
EventObserver< ? extends BatteryLowEvent > observer )
{
eventSource.registerEventObserver( observer );
}
@Override
public void unregisterEventObserver(
EventObserver< ? extends BatteryLowEvent > observer )
{
eventSource.unregisterEventObserver( observer );
}
@Override
public void removeAllObservers()
{
eventSource.removeAllObservers();
}
@Override
public void notify( BatteryLowEvent data )
{
eventSource.notify( data );
}
@Override
public void onResume( Context applicationContext )
{
applicationContext.registerReceiver( this, new IntentFilter(
Intent.ACTION_BATTERY_LOW ) );
}
@Override
public void onPause( Context applicationContext )
{
try
{
applicationContext.unregisterReceiver( this );
}
catch ( Exception e )
{}
}
@Override
public void onCreate( Context applicationContext )
{}
@Override
public void onDestroy( Context applicationContext )
{}
/*
* (non-Javadoc)
*
* @see de.unikassel.android.sdcframework.util.facade.ObservableEventSource#
* hasObservers()
*/
@Override
public boolean hasObservers()
{
return eventSource.hasObservers();
}
}