使用运行时权限检查，可以在用户选择完位置权限之后检查用户的选择并作出相应处理。代码示例：

// check location permission
if (ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {

    // Location permission is granted
     // Do your stuff here

} else {

    // Location permission is not granted
    // Ask for the permission
    ActivityCompat.requestPermissions(this,
            new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
            MY_PERMISSIONS_REQUEST_LOCATION);

    // MY_PERMISSIONS_REQUEST_LOCATION is an
    // app-defined int constant. The callback method gets the
    // result of the request.
}

//Handle the result of permission request
@Override
public void onRequestPermissionsResult(int requestCode,String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_LOCATION: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted
                // Do your stuff here

            } else {

                // permission denied
                // Do your stuff here

            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request.
    }
}