Android实现widget定时更新

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Android thread

01.public class NewsWidgetProvider extends AppWidgetProvider {
02.
03.
04.    @Override
05.    public void onDeleted(Context context, int[] appWidgetIds) {
06.    }
07.
08.    @Override
09.    public void onDisabled(Context context) {
10.        // TODO Auto-generated method stub
11.        super.onDisabled(context);
12.    }
13.
14.    @Override
15.    public void onEnabled(Context context) {
16.        // TODO Auto-generated method stub
17.        super.onEnabled(context);
18.    }
19.
20.    @Override
21.    public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
22.
23.        NewsService.updateAppWidgetIds(appWidgetIds);
24.        context.startService(new Intent(context,NewsService.class));
25.    }
26.
27.    public static RemoteViews updateAppWidget(Context context,List<RssNews> list) {
28.        RemoteViews views = 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.        }
34.
35.        Intent detailIntent=new Intent(context,NewsSiteList.class);
36.
37.        PendingIntent pending=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.    }
43.
44.    @Override
45.    public void onReceive(Context context, Intent intent) {
46.        super.onReceive(context, intent);
47.    }
48.
49.}
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01.public class NewsWidgetProvider extends AppWidgetProvider {
02.
03.
04.    @Override
05.    public void onDeleted(Context context, int[] appWidgetIds) {
06.    }
07.
08.    @Override
09.    public void onDisabled(Context context) {
10.        // TODO Auto-generated method stub
11.        super.onDisabled(context);
12.    }
13.
14.    @Override
15.    public void onEnabled(Context context) {
16.        // TODO Auto-generated method stub
17.        super.onEnabled(context);
18.    }
19.
20.    @Override
21.    public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
22.
23.        NewsService.updateAppWidgetIds(appWidgetIds);
24.        context.startService(new Intent(context,NewsService.class));
25.    }
26.
27.    public static RemoteViews updateAppWidget(Context context,List<RssNews> list) {
28.        RemoteViews views = 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.        }
34.
35.        Intent detailIntent=new Intent(context,NewsSiteList.class);
36.
37.        PendingIntent pending=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.    }
43.
44.    @Override
45.    public void onReceive(Context context, Intent intent) {
46.        super.onReceive(context, intent);
47.    }
48.
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);
}

}

Service:

Java代码
01.public class NewsService extends Service implements Runnable {
02.
03.    private static final String TAG="NewsService";
04.
05.    private static Queue<Integer> sAppWidgetIds=new LinkedList<Integer>();
06.
07.    public static final String ACTION_UPDATE_ALL = "com.xxxx.news.UPDATE_ALL";
08.
09.    private static boolean sThreadRunning = false;
10.
11.    private static Object sLock = new Object();
12.
13.
14.
15.    @Override
16.    public IBinder onBind(Intent intent) {
17.        return null;
18.    }
19.
20.    public static void updateAppWidgetIds(int[] appWidgetIds){
21.        synchronized (sLock) {
22.            for (int appWidgetId : appWidgetIds) {
23.                sAppWidgetIds.add(appWidgetId);
24.            }
25.        }
26.    }
27.
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();
34.
35.            }
36.        }
37.    }
38.
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.    }
48.
49.    @Override
50.    public void onCreate() {
51.        super.onCreate();
52.    }
53.
54.    @Override
55.    public void onStart(Intent intent, int startId) {
56.        super.onStart(intent, startId);
57.        if (null != intent) {
58.            if (ACTION_UPDATE_ALL.equals(intent.getAction())) {
59.                AppWidgetManager widget = 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.    }
70.
71.    @Override
72.    public void run() {
73.        SharedPreferences setting=getSharedPreferences("com.xxxx.news_preferences", 0);
74.        String updateTime=setting.getString("list_time", "1800000");
75.        String updateUrl=setting.getString("list_site", "xxxxxxxxx");
76.
77.
78.        AppWidgetManager appWidgetManager=AppWidgetManager.getInstance(this);
79.        RemoteViews updateViews=null;
80.
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.        }
91.
92.        Intent updateIntent=new Intent(ACTION_UPDATE_ALL);
93.        updateIntent.setClass(this, NewsService.class);
94.        PendingIntent pending=PendingIntent.getService(this, 0, updateIntent, 0);
95.
96.        Time time = new Time();
97.        long nowMillis = System.currentTimeMillis();
98.        time.set(nowMillis+Long.parseLong(updateTime));
99.        long updateTimes = time.toMillis(true);
100.        Log.d(TAG, "request next update at "+updateTimes);
101.
102.        AlarmManager alarm=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
103.        alarm.set(AlarmManager.RTC_WAKEUP, updateTimes, pending);
104.        stopSelf();
105.    }
106.
107.}

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