所以，我有一个小部件，希望它每60秒更新一次。当小部件首次添加到主屏幕时，它会成功运行其更新功能。除此之外，它应该启动一个AlarmManager，每60秒重新运行更新方法。这似乎是没有实际执行的部分。以下是我的代码：
public class ClockWidget extends AppWidgetProvider {
public static String CLOCK_WIDGET_UPDATE = "com.nickavv.cleanwidget.CLEANCLOCK_UPDATE";
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int appWidgetIds[]) {
final int N = appWidgetIds.length;
for (int i = 0; i < N; i++) {
int appWidgetId = appWidgetIds[i];
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.clocklayout);
appWidgetManager.updateAppWidget(appWidgetId, views);
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
public static void updateAppWidget(Context context, AppWidgetManager appWidgetManager, int appWidgetId) {
Log.d("log","Entered update cycle");
//Unimportant for these purposes
appWidgetManager.updateAppWidget(appWidgetId, views);
}
private PendingIntent createClockTickIntent(Context context) {
Intent intent = new Intent(CLOCK_WIDGET_UPDATE);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0,
intent, PendingIntent.FLAG_UPDATE_CURRENT);
return pendingIntent;
}
@Override
public void onEnabled(Context context) {
super.onEnabled(context);
Log.d("onEnabled","Widget Provider enabled. Starting timer to update widget every minute");
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC, System.currentTimeMillis(), 60000, createClockTickIntent(context));
}
@Override
public void onDisabled(Context context) {
super.onDisabled(context);
Log.d("onDisabled", "Widget Provider disabled. Turning off timer");
AlarmManager alarmManager = (AlarmManager) context
.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(createClockTickIntent(context));
}
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
Log.d("onReceive", "Received intent " + intent);
if (CLOCK_WIDGET_UPDATE.equals(intent.getAction())) {
Log.d("onReceive", "Clock update");
// Get the widget manager and ids for this widget provider, then
// call the shared
// clock update method.
ComponentName thisAppWidget = new ComponentName(context.getPackageName(), getClass().getName());
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
int ids[] = appWidgetManager.getAppWidgetIds(thisAppWidget);
for (int appWidgetID: ids) {
updateAppWidget(context, appWidgetManager, appWidgetID);
}
}
}
}
这是我在学习IT技术的过程中从几个教程中总结出来的产物，同时也融入了我的安卓开发经验。根据我的日志记录，它从未到达Log.d("onReceive", "Clock update")这一行。是的，我的清单已经设置了时钟更新意图。谢谢！
编辑：附加信息。我在createClockTickIntent方法中放置了一个日志行，它被触发了。所以我猜这意味着我的应用正在运行alarmManager.setRepeating这一行，但不知道为什么它实际上并没有重复。