具有AlarmManager和FusedLocationProviderClient的Android低成本定期位置

Question

我想通过AlarmManager在后台每隔几分钟获取一个位置。以下代码获取一个位置，但似乎打破了AlarmManager机制。我在这附近或咆哮错误的树吗？

public class CarryBoundaryCronnedService extends JobIntentService {
  private static final int UNIQUE_JOB_ID=1337;
  private FusedLocationProviderClient mFusedLocationClient;
  private LocationRequest mLocationRequest;
  private LocationCallback mLocationCallback;
  private LocationSettingsRequest mLocationSettingsRequest;
  private Looper mLooper;

  static void enqueueWork(Context ctxt) {
    enqueueWork(ctxt, CarryBoundaryCronnedService.class, UNIQUE_JOB_ID,
      new Intent(ctxt, CarryBoundaryCronnedService.class));
  }

  @Override
  public void onHandleWork(Intent i) {
    Log.d(getClass().getSimpleName(), "onHandleWork.");
    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);

    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(1);
    mLocationRequest.setFastestInterval(1);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
    builder.addLocationRequest(mLocationRequest);
    mLocationSettingsRequest = builder.build();

    mLooper = Looper.myLooper();
    mLooper.prepare();

    mLocationCallback = new LocationCallback() {
      @Override
      public void onLocationResult(LocationResult locationResult) {
        Log.d(getClass().getSimpleName(), "  got a fix");
        System.out.println("got a fix");
        Looper.myLooper().quitSafely();
      }
    };

    Log.d(getClass().getSimpleName(), " requestLocationUpdates.");
    mFusedLocationClient.requestLocationUpdates(mLocationRequest, mLocationCallback, mLooper); // enabled by @SuppressWarnings({"MissingPermission"}) above
    Log.d(getClass().getSimpleName(), " .requestLocationUpdates");

    Log.d(getClass().getSimpleName(), " .invoke os");

    Log.d(getClass().getSimpleName(), " loop.");
    mLooper.loop();
    Log.d(getClass().getSimpleName(), " .loop");
    Log.d(getClass().getSimpleName(), " removeLocationUpdates.");
    mFusedLocationClient.removeLocationUpdates(mLocationCallback);
    Log.d(getClass().getSimpleName(), " .removeLocationUpdates");

    Log.d(getClass().getSimpleName(), ".onHandleWork");

  }
}

修改 根据注释从AlarmManager计划意图移动到FusedLocationProviderClient计划意图。似乎在棉花糖上工作正常。目前尚不清楚我需要唤醒锁..

public class CarryBoundaryCronnedService extends IntentService {
  private final String TAG=getClass().getSimpleName();

  CarryBoundaryCronnedService(){
    super("CarryBoundaryCronnedService");
  }

  public void onHandleIntent(Intent i) {
    Log.d(TAG, "onHandleIntent.");
    LocationResult locationResult = LocationResult.extractResult(i);
    if(locationResult==null) {
      Log.d(TAG, "  no location");
      Log.d(TAG, ".onHandleIntent");
      return;
    }

    android.os.PowerManager mgr=(android.os.PowerManager)getSystemService(POWER_SERVICE);
    android.os.PowerManager.WakeLock wakeLock;
    wakeLock=mgr.newWakeLock(android.os.PowerManager.PARTIAL_WAKE_LOCK, getClass().getSimpleName());
    Log.d(TAG, "  wakeLock.acqire.");
    wakeLock.acquire();
    Log.d(TAG, "  .wakeLock.acquire");

    Log.d(TAG, "  got a fix "+locationResult.toString());

    Log.d(TAG, "  wakeLock.release.");
    wakeLock.release();
    Log.d(TAG, "  .wakeLock.release");

    Log.d(TAG, ".onHandleIntent");
  }

  static void enqueueWork(Context ctxt) {
    System.out.println("enqueueWork.");
    LocationRequest locationRequest = new LocationRequest();
    locationRequest.setInterval(60000);
    locationRequest.setFastestInterval(60000);
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
   // locationRequest.setNumUpdates(1);

    Intent intent=new Intent(ctxt, CarryBoundaryCronnedService.class);
    PendingIntent pendingIntent=PendingIntent.getService(ctxt, 0, intent, 0);

    FusedLocationProviderClient fusedLocationClient = LocationServices.getFusedLocationProviderClient(ctxt);
    fusedLocationClient.requestLocationUpdates(locationRequest, pendingIntent); // enabled by @SuppressWarnings({"MissingPermission"}) above
    System.out.println(".enqueueWork");
  }
}