android - OnLocationChanged 回调永远不会被调用

标签 android geolocation locationmanager

我正在尝试使用 LocationManager 获取用户的当前位置。我做了很多研究，似乎找不到任何有同样问题的人。 OnLocationChanged 回调似乎永远不会被调用。下面是我的各种代码和logcat。

protected LocationListener locationListener;
protected LocationManager locationManager;
protected Context context;

我的 OnCreate() 方法

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.v(TAG, "IN ON CREATE");

    this.context = getActivity();

    registerLocationUpdates();
}

我的 registerLocationUpdates 方法

void registerLocationUpdates() {
    Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_LOW);
    criteria.setPowerRequirement(Criteria.POWER_LOW);
    criteria.setAltitudeRequired(false);
    criteria.setBearingRequired(false);

    locationManager = (LocationManager)getActivity().getSystemService(LOCATION_SERVICE);

    provider = locationManager.getBestProvider(criteria, true);

    // Cant get a hold of provider
    if (provider == null) {
        Log.v(TAG, "Provider is null");
        showNoProvider();
        return;
    } else {
        Log.v(TAG, "Provider: " + provider);
    }

    locationListener = new MyLocationListener();

    locationManager.requestLocationUpdates(provider, 1L, 1f, locationListener);

    // connect to the GPS location service
    Location oldLocation = locationManager.getLastKnownLocation(provider);

    if (oldLocation != null)  {
        Log.v(TAG, "Got Old location");
        latitude = Double.toString(oldLocation.getLatitude());
        longitude = Double.toString(oldLocation.getLongitude());
        waitingForLocationUpdate = false;
        getNearbyStores();
    } else {
        Log.v(TAG, "NO Last Location found");
    }
}

我的LocationListener

private class MyLocationListener implements LocationListener {

    public void onLocationChanged(Location location) {
        latitude = Double.toString(location.getLatitude());
        longitude = Double.toString(location.getLongitude());

        Log.v(TAG, "IN ON LOCATION CHANGE");

        if (waitingForLocationUpdate) {
            getNearbyStores();
            waitingForLocationUpdate = false;
        }

        locationManager.removeUpdates(this);
    }

    public void onStatusChanged(String s, int i, Bundle bundle) {
        Log.v(TAG, "Status changed: " + s);
    }

    public void onProviderEnabled(String s) {
        Log.e(TAG, "PROVIDER DISABLED: " + s);
    }

    public void onProviderDisabled(String s) {
        Log.e(TAG, "PROVIDER DISABLED: " + s);
    }
}

我在 AndroidManifest 中的权限

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

最后是我运行我的应用程序后的 logcat

01-25 09:43:10.963: VERBOSE/NearbyListFragment(3060): IN ON CREATE
01-25 09:43:10.963: VERBOSE/LocationManagerService(1329): getProviders
01-25 09:43:10.963: VERBOSE/LocationManagerService(1329): getProviders
01-25 09:43:10.973: VERBOSE/LocationManagerService(1329): getProviders
01-25 09:43:10.983: VERBOSE/NearbyListFragment(3060): Provider: gps
01-25 09:43:10.983: DEBUG/LocationManager(3060): requestLocationUpdates: provider = gps, listener = co.fusionweb.dealsplus.app.NearbyItems$NearbyListFragment$MyLocationListener@46ef4680
01-25 09:43:10.983: DEBUG/GpsLocationProvider(1329): setMinTime 1
01-25 09:43:10.983: VERBOSE/NearbyListFragment(3060): NO Last Location found
01-25 09:43:10.983: VERBOSE/LocationManagerService(1329): _requestLocationUpdates: listener = Receiver{47421e68 Listener android.os.BinderProxy@47421a68}
01-25 09:43:11.003: VERBOSE/countingFragment(3060): IN ON CREATE VIEW
01-25 09:43:11.003: WARN/GpsLocationProvider(1329): Duplicate add listener for co.fusionweb.dealsplus
01-25 09:43:11.013: VERBOSE/ScrollListener(3060): In Constructor
01-25 09:43:11.013: VERBOSE/ScrollListener(3060): Scrolling
01-25 09:43:11.033: DEBUG/GpsLocationProvider(1329): startNavigating
01-25 09:43:11.043: DEBUG/lib_locapi(1329): loc_eng_set_qos_time_out(standalone = 60, agps = 89)
01-25 09:43:11.043: DEBUG/lib_locapi(1329): loc_eng_set_qos_accuracy(accuracy = 50)
01-25 09:43:11.043: VERBOSE/lib_locapi(1329): persist.radio.agps.mode: []
01-25 09:43:11.043: DEBUG/lib_locapi(1329): loc_eng_set_position mode, client = 1, interval = 1, mode = 1
01-25 09:43:11.043: VERBOSE/lib_locapi(1329): loc_eng_ioctl called: client = 1, ioctl_type = 2
01-25 09:43:11.043: VERBOSE/locapi_rpc_glue(1329): loc_ioctl
01-25 09:43:11.043: DEBUG/RPC(1329): written RPC packet size: [96]
01-25 09:43:11.043: DEBUG/RPC(1329): read RPC packet
01-25 09:43:11.043: DEBUG/RPC(1329): read RPC packet size: [28]
01-25 09:43:11.043: VERBOSE/locapi_rpc_glue(1329): loc_api_sync_ioctl: select_id = 0, loc_ioctl returned 0
01-25 09:43:11.043: DEBUG/RPC(1329): read RPC packet
01-25 09:43:11.043: DEBUG/RPC(1329): read RPC packet size: [80]
01-25 09:43:11.043: VERBOSE/locapi_rpc_glue(1329): Callback received: 80 (cb_id=0x5310000 handle=1)
01-25 09:43:11.043: DEBUG/RPC(1329): written RPC packet size: [28]
01-25 09:43:11.043: VERBOSE/lib_locapi(1329): loc_eng_ioctl result: client = 1, ioctl_type = 2, SUCCESS
01-25 09:43:11.043: DEBUG/lib_locapi(1329): loc_eng_start
01-25 09:43:11.043: DEBUG/locapi_rpc_glue(1329): loc_start_fix
01-25 09:43:11.043: DEBUG/RPC(1329): written RPC packet size: [44]
01-25 09:43:11.043: DEBUG/RPC(1329): read RPC packet
01-25 09:43:11.053: DEBUG/RPC(1329): read RPC packet size: [28]
01-25 09:43:11.103: DEBUG/RPC(1329): read RPC packet
01-25 09:43:11.103: DEBUG/RPC(1329): read RPC packet size: [80]
01-25 09:43:11.113: VERBOSE/locapi_rpc_glue(1329): Callback received: 100 (cb_id=0x5310000 handle=1)
01-25 09:43:11.113: VERBOSE/lib_locapi(1329): process_deferred_action: pthread_cond_wait returned
01-25 09:43:11.113: DEBUG/lib_locapi(1329): loc_eng_report_status: GPS_STATUS_SESSION_BEGIN
01-25 09:43:11.113: DEBUG/lib_locapi(1329): loc_eng_report_status: update status
01-25 09:43:11.113: VERBOSE/GpsLocationProvider(1329): reportStatus status: 1
01-25 09:43:11.113: DEBUG/GpsLocationProvider(1329): Acquiring wakelock
01-25 09:43:11.123: DEBUG/RPC(1329): written RPC packet size: [28]
01-25 09:43:11.183: DEBUG/PowerManagerService(1329): New lightsensor value:40, lcdValue:77
01-25 09:43:11.273: DEBUG/RPC(1329): read RPC packet
01-25 09:43:11.273: DEBUG/RPC(1329): read RPC packet size: [80]
01-25 09:43:11.273: VERBOSE/locapi_rpc_glue(1329): Callback received: 100 (cb_id=0x5310000 handle=1)
01-25 09:43:11.273: VERBOSE/lib_locapi(1329): process_deferred_action: pthread_cond_wait returned
01-25 09:43:11.273: DEBUG/lib_locapi(1329): loc_eng_report_status: GPS_STATUS_ENGINE_ON
01-25 09:43:11.273: DEBUG/lib_locapi(1329): loc_eng_report_status: update status
01-25 09:43:11.273: VERBOSE/GpsLocationProvider(1329): reportStatus status: 3

logcat 的 android SDK 位置部分不断重复它们自己。我已经尝试了所有我能想到并在 google 和 stackoverflow 上看到的东西。顺便说一句，我已经能够使用 API 9 中提供的 requestSingleUpdate 并遵循指南 A Deep Dive into Location 让它在 2.3 设备上工作。但我需要它使用旧 SDK 在 2.1 或 2.2 及更高版本上工作。因此，如果您有任何提示或想了解更多信息，请告诉我。提前致谢。

最佳答案

看起来你的设置应该可以工作，因为它没有，为了排除故障，我会让你的示例尽可能简单。我会让你的请求看起来像 

requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);

这样您就可以获得所有可能的更新。并注释掉关于获取最后一个已知位置的部分。现在还不需要。

然后在onLocationChanged()中，只要有

Log.v(TAG, "IN ON LOCATION CHANGE, lat=" + latitude + ", lon=" + longitude);

注释掉其余部分，以便让您的听众保持活跃。这应该为您提供真实设备上的更新流。在模拟器上，您需要使用 DDMS，并且每次按下发送都会获得一次 GPS 更新。

关于android - OnLocationChanged 回调永远不会被调用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9007600/

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