問題描述

我想實現一個 locationListener，它將根據可用性在網絡和 GPS 提供商之間切換.

I want to implement a locationListener which will switch between network and GPS providers based on availability.

例如，如果 GPS 未啟用，我希望它使用網絡，但一旦 GPS 開啟，我希望它停止偵聽來自網絡的位置更新并開始偵聽 GPS.

For example if GPS is not enabled I want it to use network but as soon as GPS is on then I want it to stop listening for location updates from network and start listening from GPS.

同樣，我希望它在 GPS 關閉后立即開始監聽來自網絡的更新.

Similarly I want it to start listening for updates from network as soon as GPS is switched off.

這可能嗎?

子問題

GPS 在提供位置定位方面與網絡一樣快嗎?

Is GPS as fast as network in providing a location fix?

推薦答案

當然，您只需獲取網絡和 GPS 的提供程序，然后將您想要的任何一個傳遞給 locationManager.requestLocationUpdates().

Sure, you just get the providers for the network and GPS and pass whichever you want to locationManager.requestLocationUpdates().

當您想停止偵聽某個提供程序時，請使用您在 locationManager.requestLocationUpdates() 中指定的偵聽器對象調用 locationManager.removeUpdates().

When you want to stop listening to a certain provider, call locationManager.removeUpdates() with the listener object you specified in locationManager.requestLocationUpdates().

網絡:

Criteria crit = new Criteria();
crit.setPowerRequirement(Criteria.POWER_LOW);
crit.setAccuracy(Criteria.ACCURACY_COARSE);
String provider = locationManager.getBestProvider(crit, false);

全球定位系統:

Criteria crit2 = new Criteria();
crit2.setAccuracy(Criteria.ACCURACY_FINE);
provider2 = locationManager.getBestProvider(crit2, false);

您可以使用 LocationManager.isProviderEnabled() 文檔 查看是否啟用/禁用了相應的提供程序.LocationManager 文檔中提供了更多信息.

You can use LocationManager.isProviderEnabled() doc to see if the appropriate provider is enabled/disabled. There's more info available in the LocationManager docs.

GPS 通常比網絡慢得多，因為您必須找到 3 顆以上遙遠的衛星等.

GPS is usually much slower than network since you have to find 3+ far-away satellites, etc.

這篇關于在網絡和 GPS 提供商之間切換的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！