安卓：getLastKnownLocation外的日期 - 如何强制位置刷新？ [英] Android: getLastKnownLocation out-of-date - how to force location refresh?

问题描述

我用

myLocation = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

要在启动我的应用程序中获取当前位置。

to retrieve the current location at the start-up of my application.

由于Android文档状态，这个位置可以是乱日，因为该方法返回时，GPS使用上一次的位置。

As the Android documentation states, this location can be "out-of-date", since the method returns the location when the GPS was used the last time.

我怎么能主动请求目前从GPS的位置？我想过用 LocationListener的，但是这可能是一个有点矫枉过正，因为我只需要位置一次（在我的应用程序的开始）。

How can I actively request the current location from the GPS? I thought about using LocationListener, however that might be a bit of an overkill, since I only need the location once (at the start of my app).

任何想法？

推荐答案

您最初的直觉是正确的 - 你需要使用 LocationListener的请求更新。既然你只需要一个位置，您可以注销的第一个值返回后LocationListener的。

Your initial intuition is correct - you need to use a LocationListener to request updates. Given that you require only a single position, you can unregister the LocationListener after the first value returns.

但在实践中，它可能是明智的，听久一点。基于位置的服务（特别是GPS）有一种倾向，跳跃了一下，当他们第一次得到他们的修复。最好的办法是听的时间设定金额，或更新的一组数字，或直到精度一定水平已经达到（位置监听器将返回的位置的准确性返回）。

In practice though, it's probably wise to listen for a little bit longer. Location Based Services (particularly GPS) have a tendency to 'jump around' a bit when they first get their fix. Your best bet is to listen for a set amount of time, or a set number of updates, or until a certain level of accuracy has been achieved (the Location Listener will return the accuracy of the position returned).

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