上下文无法解决

我正在尝试使用一种方法来安排此处描述的月度警报：

如何实施年度和月度重复警报？

但是我在线上遇到两个错误：

AlarmManager am = (AlarmManager) context .getSystemService(Context.ALARM_SERVICE); 

和

 PendingIntent sender = PendingIntent.getBroadcast(context, 

声明“上下文无法解决”和“上下文无法解析为变量”

…关于如何解决这个问题的任何建议？

  public class Alarm extends Service { // compat to support older devices @Override public void onStart(Intent intent, int startId) { onStartCommand(intent, 0, startId); } @Override public int onStartCommand(Intent intent, int flags, int startId) { // your method to check if an alarm must be fired today PendingIntent sender = PendingIntent.getBroadcast(context, Integer.parseInt(Long.toString(id)), intent, 0); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(calendar.getTimeInMillis()); calendar.add(Calendar.SECOND, 30); AlarmManager am = (AlarmManager) context .getSystemService(Context.ALARM_SERVICE); calendar.add(Calendar.MONTH, 1); am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender); // reschedule me to check again tomorrow Intent serviceIntent = new Intent(Alarm.this, Alarm.class); PendingIntent restartServiceIntent = PendingIntent.getService( Alarm.this, 0, serviceIntent, 0); AlarmManager alarms = (AlarmManager) getSystemService(ALARM_SERVICE); // cancel previous alarm alarms.cancel(restartServiceIntent); // schedule alarm for today + 1 day Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.DATE, 1); // schedule the alarm alarms.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), restartServiceIntent); } @Override public void onCreate() { // TODO Auto-generated method stub } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return null; } @Override public boolean onUnbind(Intent intent) { // TODO Auto-generated method stub return super.onUnbind(intent); } } 

Answer 1

服务是一个Context，所以请尝试以下代码：

 AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE); PendingIntent sender = PendingIntent.getBroadcast(this,