Android实现widget定时更新

Java代码

1. public class NewsWidgetProvider extends AppWidgetProvider{
4. @Override
5. public void onDeleted(Contextcontext, int []appWidgetIds){
6. }
8. @Override
9. public void onDisabled(Contextcontext){
10. //TODOAuto-generatedmethodstub
11. super .onDisabled(context);
12. }
14. @Override
15. public void onEnabled(Contextcontext){
16. //TODOAuto-generatedmethodstub
17. super .onEnabled(context);
18. }
20. @Override
21. public void onUpdate(Contextcontext,AppWidgetManagerappWidgetManager, int []appWidgetIds){
23. NewsService.updateAppWidgetIds(appWidgetIds);
24. context.startService( new Intent(context,NewsService. class ));
25. }
27. public static RemoteViewsupdateAppWidget(Contextcontext,List<RssNews>list){
28. RemoteViewsviews= new RemoteViews(context.getPackageName(),R.layout.appwidget_layout);
29. if (list.size()> 3 ){
30. views.setTextViewText(R.id.textView01,list.get( 0 ).title);
31. views.setTextViewText(R.id.textView02,list.get( 1 ).title);
32. views.setTextViewText(R.id.textView03,list.get( 2 ).title);
33. }
35. IntentdetailIntent= new Intent(context,NewsSiteList. class );
37. PendingIntentpending=PendingIntent.getActivity(context, 0 ,detailIntent, 0 );
38. views.setOnClickPendingIntent(R.id.textView01,pending);
39. views.setOnClickPendingIntent(R.id.textView02,pending);
40. views.setOnClickPendingIntent(R.id.textView03,pending);
41. return views;
42. }
44. @Override
45. public void onReceive(Contextcontext,Intentintent){
46. super .onReceive(context,intent);
47. }
49. }

    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);
	}

}
  

Java代码

1. public class NewsService extends Service implements Runnable{
3. private static final StringTAG= "NewsService" ;
5. private static Queue<Integer>sAppWidgetIds= new LinkedList<Integer>();
7. public static final StringACTION_UPDATE_ALL= "com.xxxx.news.UPDATE_ALL" ;
9. private static boolean sThreadRunning= false ;
11. private static ObjectsLock= new Object();
15. @Override
16. public IBinderonBind(Intentintent){
17. return null ;
18. }
20. public static void updateAppWidgetIds( int []appWidgetIds){
21. synchronized (sLock){
22. for ( int appWidgetId:appWidgetIds){
23. sAppWidgetIds.add(appWidgetId);
24. }
25. }
26. }
28. public static int getNextWidgetId(){
29. synchronized (sLock){
30. if (sAppWidgetIds.peek()== null ){
31. return AppWidgetManager.INVALID_APPWIDGET_ID;
32. } else {
33. return sAppWidgetIds.poll();
35. }
36. }
37. }
39. private static boolean hasMoreUpdates(){
40. synchronized (sLock){
41. boolean hasMore=!sAppWidgetIds.isEmpty();
42. if (!hasMore){
43. sThreadRunning= false ;
44. }
45. return hasMore;
46. }
47. }
49. @Override
50. public void onCreate(){
51. super .onCreate();
52. }
54. @Override
55. public void onStart(Intentintent, int startId){
56. super .onStart(intent,startId);
57. if ( null !=intent){
58. if (ACTION_UPDATE_ALL.equals(intent.getAction())){
59. AppWidgetManagerwidget=AppWidgetManager.getInstance( this );
60. updateAppWidgetIds(widget.getAppWidgetIds( new ComponentName( this ,NewsWidgetProvider. class )));
61. }
62. }
63. synchronized (sLock){
64. if (!sThreadRunning){
65. sThreadRunning= true ;
66. new Thread( this ).start();
67. }
68. }
69. }
71. @Override
72. public void run(){
73. SharedPreferencessetting=getSharedPreferences( "com.xxxx.news_preferences" , 0 );
74. StringupdateTime=setting.getString( "list_time" , "1800000" );
75. StringupdateUrl=setting.getString( "list_site" , "xxxxxxxxx" );
78. AppWidgetManagerappWidgetManager=AppWidgetManager.getInstance( this );
79. RemoteViewsupdateViews= null ;
81. while (hasMoreUpdates()){
82. int appWidgetId=getNextWidgetId();
83. List<RssNews>listNews=NewsContenttList.getNewsList(updateUrl);
84. if (listNews!= null ){
85. updateViews=NewsWidgetProvider.updateAppWidget( this ,listNews);
86. }
87. if (updateViews!= null ){
88. appWidgetManager.updateAppWidget(appWidgetId,updateViews);
89. }
90. }
92. IntentupdateIntent= new Intent(ACTION_UPDATE_ALL);
93. updateIntent.setClass( this ,NewsService. class );
94. PendingIntentpending=PendingIntent.getService( this , 0 ,updateIntent, 0 );
96. Timetime= new Time();
97. long nowMillis=System.currentTimeMillis();
98. time.set(nowMillis+Long.parseLong(updateTime));
99. long updateTimes=time.toMillis( true );
100. Log.d(TAG, "requestnextupdateat" +updateTimes);
102. AlarmManageralarm=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
103. alarm.set(AlarmManager.RTC_WAKEUP,updateTimes,pending);
104. stopSelf();
105. }
107. }

Android实现widget定时更新