Question

我正在尝试使用Android设备上的LocationEngine来获取用户位置，但是当我为应用加注星标时，用户的标记位于（0.0,0.0）并且永远不会更新它的位置。怎么可能？

我尝试复制示例location Layer



private void enableLocationPlugin() {

    // Check if permissions are enabled and if not request
    if (PermissionsManager.areLocationPermissionsGranted(this)) {

        // Create an instance of LOST location engine
        initializeLocationEngine();
        LocationLayerOptions options = LocationLayerOptions.builder(this)
                .build();
        locationLayerPlugin = new LocationLayerPlugin(mapView, mapboxMap, locationEngine, options);
        locationLayerPlugin.setRenderMode(RenderMode.COMPASS);
        locationLayerPlugin.setCameraMode(CameraMode.TRACKING);
        locationLayerPlugin.setLocationLayerEnabled(true);
    } else {
        permissionsManager = new PermissionsManager(this);
        permissionsManager.requestLocationPermissions(this);
    }
}


private void initializeLocationEngine() {
    locationEngine = new LocationEngineProvider(this).obtainBestLocationEngineAvailable();
    locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);
    locationEngine.setInterval(1000);
    locationEngine.setFastestInterval(500);
    locationEngine.addLocationEngineListener(this);
    locationEngine.activate();
    locationEngine.requestLocationUpdates();


    Location lastLocation = locationEngine.getLastLocation();
    if (lastLocation != null) {
        setCameraPosition(lastLocation);
        locationEngine.addLocationEngineListener(this);
    } else {
        locationEngine.addLocationEngineListener(this);
    }
}

private void enableLocationPlugin() { // Check if permissions are enabled and if not request if (PermissionsManager.areLocationPermissionsGranted(this)) { // Create an instance of LOST location engine initializeLocationEngine(); LocationLayerOptions options = LocationLayerOptions.builder(this) .build(); locationLayerPlugin = new LocationLayerPlugin(mapView, mapboxMap, locationEngine, options); locationLayerPlugin.setRenderMode(RenderMode.COMPASS); locationLayerPlugin.setCameraMode(CameraMode.TRACKING); locationLayerPlugin.setLocationLayerEnabled(true); } else { permissionsManager = new PermissionsManager(this); permissionsManager.requestLocationPermissions(this); } } private void initializeLocationEngine() { locationEngine = new LocationEngineProvider(this).obtainBestLocationEngineAvailable(); locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY); locationEngine.setInterval(1000); locationEngine.setFastestInterval(500); locationEngine.addLocationEngineListener(this); locationEngine.activate(); locationEngine.requestLocationUpdates(); Location lastLocation = locationEngine.getLastLocation(); if (lastLocation != null) { setCameraPosition(lastLocation); locationEngine.addLocationEngineListener(this); } else { locationEngine.addLocationEngineListener(this); } } 我在grandle中使用这个版本的MapBox

Answer 1

我有同样的问题。问题是您正在尝试获取高精度位置。高精度应结合使用GPS，蜂窝数据，WiFi等来获得最准确的位置；但由于某种原因，我不知道，它是行不通的。

有四个选项：

NO_POWER

LOW_POWER

BALANCED_POWER_ACCURACY

HIGH_ACCURACY

我更改了以下代码行：

echo $data[69]['passenger_vehicle_lanes']['maximum_lanes'].'<br>';

对此：

locationEngine.setPriority(LocationEnginePriority.HIGH_ACCURACY);

成功了！

Answer 2

关于您的代码段的几点注释。

LocationLayerOptions options = LocationLayerOptions.builder(this)
            .build();

不需要，因为您实际上并未更改任何选项。

locationLayerPlugin.setLocationLayerEnabled(true);

不需要，因为您正在呼叫setRenderMode正上方自动启用它

https://github.com/mapbox/mapbox-plugins-android/issues/460已经报告了在nullisland（0.0,0.0）处查看用户位置的问题。

对于位置更新，看起来您正在附加一个侦听器。您是否在该侦听器中接收更新，并且位置图层没有更新或者您没有收到任何更新？如果是后者，那么使用locationEngine而不是位置图层插件更容易出现问题。

Answer 3

抱歉，我没有足够的评论意见。但是，我遇到了类似的麻烦。它只发生在我运行应用程序的第一次。后来，它更新并正常工作。

UserLocation不适用于MapBox

3 个答案: