問題描述
啟用 GPS 后，需要一些時間才能準備好 GPS.所以使用這個代碼可能會得到一個過時的位置:位置 = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);我無法使用已過期的位置.如何獲得我需要的位置?
After GPS is enabled, it will take some time before the GPS is ready. So use this code may get a location that is out of date: location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); I can't use the location that is out of date. How can I get the location that I need?
這是一個類似的問題:Android:getLastKnownLocation 過期 - 如何強制位置刷新?
從中，我可以使用 LocationListener 獲取更新的位置，該位置應該不會過時.這是正確的.但是我該如何處理這種情況:
From it, I can use LocationListener to get the updated location, which should be not out of date. It's correct. But how can I handle this case:
我已經啟用了 GPS，然后啟動我的應用程序.如果我呆在一個地方不動，那么 onLocationChanged() 將不會被調用.所以不能用這個方法來判斷getLastKnownLocation()的返回值是不是過期了?
I have already enabled GPS, and then start my app. If I stay at one place and don't move, then onLocationChanged() won't be called. So I can't use this method to judge whether the return value of getLastKnownLocation() is not out-of-date?
有什么想法嗎?
推薦答案
如何獲取未過期的位置?
How to get location that isn't out of date?
您調用 requestLocationUpdates() 的 minTime 為 1000 毫秒，對于 onLocationChanged() 中的每個 Location，您調用 getAccuracy().如果您可以接受準確度，請調用 removeUpdates().
You call requestLocationUpdates() with the minTime of 1000 ms, for every Location in onLocationChanged(), you call getAccuracy(). If the accuracy is acceptable for you, call removeUpdates().
所以我不能用這個方法來判斷getLastKnownLocation()的返回值是否過時
So I can't use this method to judge whether the return value of getLastKnownLocation() is not out-of-date
我認為它返回的 Location 對象將包含一個 時間戳.您可以為現在與位置的 getTime()
I think the Location object that it returns will contain a time stamp. You can set a tolerance for the time difference between now and the Location's getTime()
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