我看着其他問題,但無法找到anwer。 無論如何,我試圖獲取設備的位置,它只是不會工作。我正在使用Android 5.0(API 21)。呼叫需要權限,可能會被用戶拒絕時,試圖獲取位置
public class MainActivity extends AppCompatActivity implements LocationListener {
LocationManager locationManager;
String provider;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
provider = locationManager.getBestProvider(new Criteria(), false);
Location location = locationManager.getLastKnownLocation(provider);
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
錯誤是在.getLastKnowLocation()時發生。它說我應該檢查權限,但我已經將權限添加到Android清單。
uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
當我點擊紅色燈泡,有「添加權限檢查」選項,當我點擊它,它的廣告是:
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
但是當我運行它,它總是這樣回報; ,就像我沒有權限。
檢查Android運行時權限 –