这个问题可能是由于在AndroidManifest.xml文件中未正确添加位置权限导致的。请将以下代码添加到AndroidManifest.xml文件中：

如果您已经添加了这个权限，但仍然遇到问题，那么您需要确保您的应用在运行时请求位置权限。您可以使用以下代码在运行时请求位置权限：

if (ContextCompat.checkSelfPermission(this,
        Manifest.permission.ACCESS_FINE_LOCATION)
        != PackageManager.PERMISSION_GRANTED) {

    // Permission is not granted
    // Should we show an explanation?
    if (ActivityCompat.shouldShowRequestPermissionRationale(this,
            Manifest.permission.ACCESS_FINE_LOCATION)) {
        // Show an explanation to the user *asynchronously* -- don't block
        // this thread waiting for the user's response! After the user
        // sees the explanation, try again to request the permission.
    } else {
        // No explanation needed; request 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.
    }
} else {
    // Permission has already been granted
}

请注意，上述代码需要添加回调方法来处理结果。例如：

@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
            } else {

                // Permission denied
            }
            return;
        }
    }
}

通过添加位置权限和运行时请求，您的应用应该能够正确访问位置服务。