根据 this tutorial,我创建了一个小部件,应该显示时间。Java方式可行,但服务方式不行。
任何帮助都受到赞赏。
HelloWidget.java:
public class HelloWidget extends AppWidgetProvider {
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
Intent intent = new Intent(context, UpdateService.class);
context.startService(intent);
}
}
UpdateService.java:
public final class UpdateService extends Service {
@Override
public void onStart(Intent intent, int startId) {
RemoteViews updateViews = new RemoteViews(this.getPackageName(), R.layout.main);
Date date = new Date();
java.text.DateFormat format = SimpleDateFormat.getTimeInstance(
SimpleDateFormat.MEDIUM, Locale.getDefault());
updateViews.setTextViewText(R.id.widget_textview, "Current Time " + format.format(date));
ComponentName thisWidget = new ComponentName(this, HelloWidget.class);
AppWidgetManager manager = AppWidgetManager.getInstance(this);
manager.updateAppWidget(thisWidget, updateViews);
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}
问题:
小部件显示当前时间,但不更新(使用java的方式可以更新)。
我的主要目标是在每天18:56更新小部件。 我不知道这是否是正确的方法,但我尝试修改onUpdate方法如下,但它与ALARM_SERVICE存在问题:无法将ALARM_SERVICE解析为变量。
hello_widget_provider.xml文件包含以下行:android:updatePeriodMillis="1000"
public class HelloWidget extends AppWidgetProvider {
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
AlarmManager alarmManager;
Intent intent = new Intent(context, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0,
intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 18);
cal.set(Calendar.MINUTE, 56);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 86400, pendingIntent);
}
}
任何帮助都受到赞赏。
m.setRepeating(AlarmManager.RTC, TIME.getTime().getTime(), 1000 * 1, service);
- erdomester