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我们已经构建了一个目前在沙特阿拉伯使用的 Android 应用程序，我们在用户点击特定按钮时获取用户的位置。

我们使用 Google Location API 获取位置直到 5 秒，根据我们的要求，我们需要获得小于 50 的准确度。

在某些情况下，我们获得了这种准确度，但在某些情况下，我们获得了超过 100 到 2000 的准确度。

我们使用以下代码构建了此功能。

public class LocationService implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
     private LocationRequest locationRequest;
     private GoogleApiClient locationClient;
     private Context tempContext = null;
     public static Location mLastLocation = null;
     public Handler mHandler = null;
    long Id = 0;

 public LocationService(Context context) {
  try {
    tempContext = context;

   if (GooglePlayServicesUtil.isGooglePlayServicesAvailable(tempContext) == ConnectionResult.SUCCESS) {
        locationRequest = LocationRequest.create();
        locationRequest.setInterval(ConstantData.ACTION_LOCATIONTIME_INTERVAL); // 2000
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

        locationClient = new GoogleApiClient.Builder(tempContext)
              .addApi(LocationServices.API)
              .addConnectionCallbacks(this)
              .addOnConnectionFailedListener(this).build();

        if (!locationClient.isConnected() || !locationClient.isConnecting()) {
            locationClient.connect();
        }

        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
            .addLocationRequest(locationRequest);
        builder.setNeedBle(true);

   }
  } 
  catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

 }

 @Override
 public void onLocationChanged(Location location) {
 }

 @Override
 public void onConnected(Bundle arg0) {
  // TODO Auto-generated method stub
  try {
    mLastLocation = getLocation();
    PendingResult<Status> pendingResult = LocationServices.FusedLocationApi
     .requestLocationUpdates(locationClient, locationRequest, this);

    getLocation task = new getLocation();
    task.execute((Void) null);

  } 
  catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

 public Location getLocation() {
    return LocationServices.FusedLocationApi
        .getLastLocation(locationClient);
 }

 public void stopLocationUpdates() {
  try {
   if (locationClient != null && locationClient.isConnected()) {
        LocationServices.FusedLocationApi.removeLocationUpdates(locationClient, this);
        locationClient.disconnect();
        locationClient = null;
   }
  } 
  catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

 private class getLocation extends AsyncTask<Void, Void, Void> {
 @Override
  protected Void doInBackground(Void... params) {
   int limit = 0, totaltry = 0;
   try 
   {
    totaltry = 10;
    while (limit < totaltry) {
     Thread.sleep(500);
     mLastLocation = getLocation();
     if (mLastLocation != null
       && mLastLocation.getAccuracy() < 50)
      break;
     limit++;
    }

   } 
   catch (Exception e) {
    e.printStackTrace();
   }

   return null;
  }

  protected void onPostExecute(Void result) {
   try 
   {
       stopLocationUpdates();
   } 
   catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
 }

目前，我们正在尝试使用以下链接作为参考来实现相同的功能。

http://adavis.info/2014/09/android-location-updates-with-the-fusedlocationapi.html

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