Android实现widget定时更新

publicclassNewsWidgetProviderextendsAppWidgetProvider{


 @Override
 publicvoidonDeleted(Contextcontext,int[]appWidgetIds){
}

 @Override
 publicvoidonDisabled(Contextcontext){
 //TODOAuto-generatedmethodstub
 super.onDisabled(context);
}

 @Override
 publicvoidonEnabled(Contextcontext){
 //TODOAuto-generatedmethodstub
 super.onEnabled(context);
}

 @Override
 publicvoidonUpdate(Contextcontext,AppWidgetManagerappWidgetManager,int[]appWidgetIds){

NewsService.updateAppWidgetIds(appWidgetIds);
 context.startService(newIntent(context,NewsService.class));
}

 publicstaticRemoteViewsupdateAppWidget(Contextcontext,List<RssNews>list){
 RemoteViewsviews=newRemoteViews(context.getPackageName(),R.layout.appwidget_layout);
 if(list.size()>3){
 views.setTextViewText(R.id.textView01,list.get(0).title);
 views.setTextViewText(R.id.textView02,list.get(1).title);
 views.setTextViewText(R.id.textView03,list.get(2).title);
}

 IntentdetailIntent=newIntent(context,NewsSiteList.class);

 PendingIntentpending=PendingIntent.getActivity(context,0,detailIntent,0);
views.setOnClickPendingIntent(R.id.textView01,pending);
views.setOnClickPendingIntent(R.id.textView02,pending);
views.setOnClickPendingIntent(R.id.textView03,pending);
 returnviews;
}

 @Override
 publicvoidonReceive(Contextcontext,Intentintent){
 super.onReceive(context,intent);
}

}

public class NewsWidgetProvider extends AppWidgetProvider {


	@Override
	public void onDeleted(Context context, int[] appWidgetIds) {
	}

	@Override
	public void onDisabled(Context context) {
		// TODO Auto-generated method stub
		super.onDisabled(context);
	}

	@Override
	public void onEnabled(Context context) {
		// TODO Auto-generated method stub
		super.onEnabled(context);
	}

	@Override
	public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {

		NewsService.updateAppWidgetIds(appWidgetIds);
		context.startService(new Intent(context,NewsService.class));
	}
	
	public static RemoteViews updateAppWidget(Context context,List<RssNews> list) {
		RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.appwidget_layout);
		if (list.size() > 3) {
			views.setTextViewText(R.id.textView01, list.get(0).title);
			views.setTextViewText(R.id.textView02, list.get(1).title);
			views.setTextViewText(R.id.textView03, list.get(2).title);
		}

		Intent detailIntent=new Intent(context,NewsSiteList.class);
		
		PendingIntent pending=PendingIntent.getActivity(context, 0, detailIntent, 0);
		views.setOnClickPendingIntent(R.id.textView01, pending);
		views.setOnClickPendingIntent(R.id.textView02, pending);
		views.setOnClickPendingIntent(R.id.textView03, pending);
		return views;
	}
	
	@Override
	public void onReceive(Context context, Intent intent) {
		super.onReceive(context, intent);
	}

}

Service:

publicclassNewsServiceextendsServiceimplementsRunnable{

 privatestaticfinalStringTAG="NewsService";

 privatestaticQueue<Integer>sAppWidgetIds=newLinkedList<Integer>();

 publicstaticfinalStringACTION_UPDATE_ALL="com.xxxx.news.UPDATE_ALL";

 privatestaticbooleansThreadRunning=false;

 privatestaticObjectsLock=newObject();



 @Override
 publicIBinderonBind(Intentintent){
 returnnull;
}

 publicstaticvoidupdateAppWidgetIds(int[]appWidgetIds){
 synchronized(sLock){
 for(intappWidgetId:appWidgetIds){
sAppWidgetIds.add(appWidgetId);
}
}
}

 publicstaticintgetNextWidgetId(){
 synchronized(sLock){
 if(sAppWidgetIds.peek()==null){
 returnAppWidgetManager.INVALID_APPWIDGET_ID;
 }else{
 returnsAppWidgetIds.poll();

}
}
}

 privatestaticbooleanhasMoreUpdates(){
 synchronized(sLock){
 booleanhasMore=!sAppWidgetIds.isEmpty();
 if(!hasMore){
 sThreadRunning=false;
}
 returnhasMore;
}
}

 @Override
 publicvoidonCreate(){
 super.onCreate();
}

 @Override
 publicvoidonStart(Intentintent,intstartId){
 super.onStart(intent,startId);
 if(null!=intent){
 if(ACTION_UPDATE_ALL.equals(intent.getAction())){
 AppWidgetManagerwidget=AppWidgetManager.getInstance(this);
 updateAppWidgetIds(widget.getAppWidgetIds(newComponentName(this,NewsWidgetProvider.class)));
}
}
 synchronized(sLock){
 if(!sThreadRunning){
 sThreadRunning=true;
 newThread(this).start();
}
}
}

 @Override
 publicvoidrun(){
 SharedPreferencessetting=getSharedPreferences("com.xxxx.news_preferences",0);
 StringupdateTime=setting.getString("list_time","1800000");
 StringupdateUrl=setting.getString("list_site","xxxxxxxxx");


 AppWidgetManagerappWidgetManager=AppWidgetManager.getInstance(this);
 RemoteViewsupdateViews=null;

 while(hasMoreUpdates()){
 intappWidgetId=getNextWidgetId();
List<RssNews>listNews=NewsContenttList.getNewsList(updateUrl);
 if(listNews!=null){
 updateViews=NewsWidgetProvider.updateAppWidget(this,listNews);
}
 if(updateViews!=null){
appWidgetManager.updateAppWidget(appWidgetId,updateViews);
}
}

 IntentupdateIntent=newIntent(ACTION_UPDATE_ALL);
 updateIntent.setClass(this,NewsService.class);
 PendingIntentpending=PendingIntent.getService(this,0,updateIntent,0);

 Timetime=newTime();
 longnowMillis=System.currentTimeMillis();
time.set(nowMillis+Long.parseLong(updateTime));
 longupdateTimes=time.toMillis(true);
 Log.d(TAG,"requestnextupdateat"+updateTimes);

AlarmManageralarm=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarm.set(AlarmManager.RTC_WAKEUP,updateTimes,pending);
stopSelf();
}

}