警报管理器在具有 BroadcastReceiver 的应用程序中不起作用

Question

我正在做一个应用程序，它使用geofences 来跟踪我们的事件，我想创建一个警报管理器，它每天激活并为当天的事件添加地理围栏（取自数据库）。

我需要创建一个活动来使用地理围栏，在这个活动中，我输入了BroadcastReceiver。似乎它根本不起作用。我什至没有从这些活动中得到任何日志。我不知道为什么，但我想 Manifest 中可能有问题。如果有人能看到这个，我将不胜感激。

类 MyScheduler：

public class MyScheduler extends Activity {


protected static final String TAG = "MyScheduler";

@Override
protected void onCreate(Bundle savedInstanceState) {
    Log.i(TAG, "onCreate");
    super.onCreate(savedInstanceState);
    setRecurringAlarm(this);
}

private void setRecurringAlarm(Context context) {

    Log.i(TAG, "setReccuringAlarm");
    Calendar updateTime = Calendar.getInstance();
    updateTime.setTimeZone(TimeZone.getTimeZone("GMT+1:00"));
    updateTime.set(Calendar.HOUR_OF_DAY, 15);
    updateTime.set(Calendar.MINUTE, 10);

    Intent intent = new Intent(context, Tasks.class);
    PendingIntent recurringDownload = PendingIntent.getBroadcast(context,
            0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
    AlarmManager alarms = (AlarmManager) this.getSystemService(
            Context.ALARM_SERVICE);
    alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP,
            updateTime.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, recurringDownload);
    }
}

使用 BroadcastReceiver 的任务：

public class Tasks  extends Activity
implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, ResultCallback<Status> {
Context context;
final public static String ONE_TIME = "onetime";

EventDAO eventDAO;

protected static final String TAG = "MyGeofence";

Calendar calendar = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
String today = dateFormat.format(calendar.getTime());
List<Event> eventsList;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    context = getApplicationContext();

    mGeofenceList = new ArrayList<Geofence>();
    mGeofencePendingIntent = null;
    mSharedPreferences = getSharedPreferences(Constants.SHARED_PREFERENCES_NAME,
            MODE_PRIVATE);
    mGeofencesAdded = mSharedPreferences.getBoolean(Constants.GEOFENCES_ADDED_KEY, false);

    buildGoogleApiClient();
}

/// geofences mathods, not needed

BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
    @Override

    public void onReceive(Context context, Intent intent) {
        Log.i(ONE_TIME, "Executed Tasks.Java File");
        //Some task here for every morning
        eventDAO = new EventDAO(context);
        eventsList = eventDAO.getComingEvents(today, today);

        for( Event event : eventsList){
            String place = event.getEndLocalisationX();
            Log.i(ONE_TIME, place);

            Double lat = Double.parseDouble(event.getEndLocalisationY());
            Double lng = Double.parseDouble(event.getEndLocalisationX());
            MY_PLACES.put(place, new LatLng(lat, lng));
        }

        populateGeofenceList();
        addGeofences();
    }
};

@Override
protected void onDestroy() {
    super.onDestroy();
    unregisterReceiver(broadcastReceiver);
}

以及清单的一部分：

    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <activity android:name=".MyScheduler"/>
    <activity android:name=".Tasks"/>

    <receiver android:name=".Tasks" >
     </receiver>

我可以补充一点，所有带有地理围栏的东西都运行良好，所以我没有把地理围栏代码放在上面，因为它更容易阅读。希望有人能提供帮助！ :)

Answer 1

您正在创建一个 PendingIntent 来发送广播，但您指定了一个 Activity 类（任务）。如果 Android 甚至允许这样做，您不应该设置警报来用 UI 来打断用户。您应该将广播接收器移到外部类中，例如 TasksReceiver：

public class TasksReceiver extends BroadcastReceiver {
 @Override
 public void onReceive(Context context, Intent intent) {
    Log.i(ONE_TIME, "Executed Tasks.Java File");
    //Some task here for every morning
    EventDAO eventDAO = new EventDAO(context);
    List<Event> eventsList = eventDAO.getComingEvents(today, today);

    for( Event event : eventsList){
        String place = event.getEndLocalisationX();
        Log.i(ONE_TIME, place);

        Double lat = Double.parseDouble(event.getEndLocalisationY());
        Double lng = Double.parseDouble(event.getEndLocalisationX());
        MY_PLACES.put(place, new LatLng(lat, lng));
    }

    populateGeofenceList();
    addGeofences();
   }
}

并为待处理的意图指定类名，清单中的接收者声明如下所示：

<receiver android:name=".TasksReceiver" />