Android FusedLocationProviderApi : Incoming intent has no LocationResult or LocationAvailability

Question

我正在尝试通过 Google 的 FusedLocationProviderApi 订阅位置更新。我想在后台接收更新，这样即使应用程序被杀死我也会收到更新。尽我所能遵循在线文档，我编写了以下代码。注意:这是在 Intent 服务中完成的，而不是在 UI 线程上完成的，这就是我使用阻塞连接/结果方法的原因。

private void startLocationServices(String deviceId, int pollingInterval) {
    Log.i(TAG, "Starting location services with interval: " + pollingInterval + "ms");
    PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
    final PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
    wakeLock.acquire();

    final GoogleApiClient googleApiClient =
            new GoogleApiClient.Builder(this)
                    .addApi(LocationServices.API)
                    .build();

    ConnectionResult result = googleApiClient.blockingConnect();

    if (!result.isSuccess() || !googleApiClient.isConnected()) {
        Log.e(TAG, "Failed to connect to Google Api");
        wakeLock.release();
        return;
    }

    LocationRequest locationRequest = new LocationRequest();
    locationRequest.setInterval(pollingInterval);
    locationRequest.setFastestInterval(10000);
    locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

    Intent locationIntent = new Intent(this, GeoBroadcastReceiver.class);
    locationIntent.putExtra(EXTRA_LOCATION_UPDATE_DEVICE_ID, deviceId);
    locationIntent.setAction(GeoBroadcastReceiver.ACTION_LOCATION_UPDATE);
    PendingIntent locationPendingIntent = PendingIntent.getBroadcast(
            this, 0, locationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    PendingResult pendingResult = LocationServices.FusedLocationApi
            .requestLocationUpdates(googleApiClient, locationRequest, locationPendingIntent);

    Result requestResult = pendingResult.await();
    Status requestStatus = requestResult.getStatus();

    if (requestStatus.isSuccess()) {
        Log.i(TAG, "Successfully subscribed to location updates.");
    } else {
        Log.e(TAG, String.format(
                        "Failed subscribe to location updates. Error code: %d, Message: %s.",
                        requestStatus.getStatusCode(),
                        requestStatus.getStatusMessage()));
    }

    googleApiClient.disconnect();
    wakeLock.release();
}

当我运行它时，我看到 requestStatus.isSuccess() 返回 true，表明我已成功订阅位置更新。此外，扩展了 WakefulBroadcastReceiver 的 GeoBroadcastReciever 以正确的轮询间隔接收 Intent ，并执行正确的操作。到目前为止还不错，看起来。以下是我在 GeoBroadcastReceiver 的 onReceive 方法中所做的:

    if (LocationResult.hasResult(intent)) {
        LocationResult locationResult = LocationResult.extractResult(intent);
        Location location = locationResult.getLastLocation();
        if (location != null) {
            GeoMonitoringService.wakefulLocationUpdate(context, location);
        } else {
            Log.e(TAG, "LocationResult does not contain a LastLocation.");
        }
    } else {
        Log.e(TAG, "Intent does not contain a LocationResult.");
    }

问题是，无论何时 Intent 进来，它都不包含 LocationResult，也不包含 LocationAvailabilityResult。我在调试器中检查了传入的 Intent ， Intent 的附加项中唯一的项目是我在设置 Intent 时添加的附加项(设备 ID)。因此，LocationResult.hasResult() 返回 false。每一次。

我已经在运行 4.0.1 的 Galaxy Note 4 和运行 5.1.1 的 Nexus 4 上试过了，结果相同。

如果我在手机上禁用定位功能，我就会像预期的那样完全停止接收 Intent 。

Answer 1

从pending intent中移除extras，否则定位结果不送达。我无法在文档中找到对此进行解释的位置，但经过大量试验和错误后我发现了。