更改位置引擎请求间隔

Question

我在我的 App 中使用 mapbox。在为我的locationEngine 构建请求时，我经过了 20000 毫秒，但在某个时刻，我需要更改该间隔并每隔 5000 毫秒通知一次位置更改。

有没有办法改变这个间隔，或者为我的locationEngine 建立另一个请求？

这是我尝试过的：

这是我初始化定位引擎的地方

   @SuppressLint("MissingPermission")
    private void initializeLocationEngine(int interval) {
        locationEngine =LocationEngineProvider.getBestLocationEngine(parentActivity);
        LocationEngineRequest request = buildEngineRequest(interval);
        locationEngine.requestLocationUpdates(request, callback, null);
        mapboxNavigation.setLocationEngine(locationEngine);
    }

当我想改变间隔时，我会调用这个方法：

  private void changeLocationEngineInterval(int interval) {
        removeLocationEngineListener();
        LocationEngineRequest request = buildEngineRequest(interval);
        if (ActivityCompat.checkSelfPermission(parentActivity, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(parentActivity, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        locationEngine.requestLocationUpdates(request, callback, null);
        mapboxNavigation.setLocationEngine(locationEngine);
    }

Answer 1

区间是对象的构造函数的参数，所以你需要销毁第一个LocationEngineRequest，并用你要使用的新区间创建另一个。

问候

编辑

我在这里放了一些示例代码。将您的对象作为全局变量是一个很好的做法，这样您就可以从这两种方法中访问，并且您可以覆盖它而无需删除并重新创建。

public class ExampleActivity extends AppCompatActivity {

LocationEngineRequest request;

@SuppressLint("MissingPermission")
private void initializeLocationEngine(int interval) {
    locationEngine =LocationEngineProvider.getBestLocationEngine(parentActivity);
    request = buildEngineRequest(interval);
    locationEngine.requestLocationUpdates(request, callback, null);
    mapboxNavigation.setLocationEngine(locationEngine);
}

private void changeLocationEngineInterval(int interval) {
    //removeLocationEngineListener(); <-- I don't know what u doing here, but maybe you don't need
    request = buildEngineRequest(interval);
    if (ActivityCompat.checkSelfPermission(parentActivity, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(parentActivity, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    locationEngine.requestLocationUpdates(request, callback, null);
    mapboxNavigation.setLocationEngine(locationEngine);
}

希望对你有帮助。