Android位置管理器getbestlocation返回null

Question

我需要一些關於Android中的關於LocationManager的信息/幫助。我使用此代碼根據他的位置獲取用戶的特定信息，但在某些情況下，我得到provider=null（我不確定何時，因爲該例外已上傳到我們的服務器，我無法再現它）。

下面是示例代碼：

LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 
Criteria crta = new Criteria(); 
crta.setAccuracy(Criteria.ACCURACY_FINE); 
crta.setAltitudeRequired(false); 
crta.setBearingRequired(false); 
crta.setCostAllowed(true); 
crta.setPowerRequirement(Criteria.POWER_LOW); 
String provider = locationManager.getBestProvider(crta, true); 
Log.d("","provider : "+provider); 
// String provider = LocationManager.GPS_PROVIDER; 
Location location = locationManager.getLastKnownLocation(provider); 
updateWithNewLocation(location); 
locationManager.requestLocationUpdates(provider, 1000, 0, locationListener); 

我怎麼能當我的供應商爲空，如果有一種方式來獲得當前位置，並使用它？

在此先感謝！

Answer 1

試試這個代碼並且不要忘記，你的供應商ATLEAST一個應該被啓用

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
Criteria crta = new Criteria(); 
crta.setAccuracy(Criteria.ACCURACY_FINE); 
crta.setAltitudeRequired(true); 
crta.setBearingRequired(true); 
crta.setCostAllowed(true); 
crta.setPowerRequirement(Criteria.POWER_LOW); 
String provider = locationManager.getBestProvider(crta, true); 
Log.d("","provider : "+provider); 
// String provider = LocationManager.GPS_PROVIDER; 
locationManager.requestLocationUpdates(provider, 1000, 0, locationListener); 
Location location = locationManager.getLastKnownLocation(provider); 
//updateWithNewLocation(location);