我有一个使用 GooglePlayAPI 获取位置的代码。在那段代码中,我使用了 getAcvitity,因为这是一个片段,我把它放在我的 OnCreate 中。因为我希望在 recyclerview 中显示值,所以我将这部分代码放在 onCreateView 中。不幸的是,位置代码导致我的 onCreate 在我的 onCreateView 之后加载,因此我有一个没有值的 recyclerview。我试图将我的位置代码放在我的 onCreateView 中,但这不起作用。有谁知道我的问题的解决方案?这是我的代码。
public class TestFragment extends Fragment {
private double latitude;
private static double longitude;
private FusedLocationProviderClient mFusedLocationClient;
RecyclerView mRecyclerView;
PlanetRecyclerViewAdapter adapter;
private OnFragmentInteractionListener mListener;
public TestFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
requestPermission();
mFusedLocationClient = LocationServices.getFusedLocationProviderClient(getActivity());
if (ActivityCompat.checkSelfPermission(getActivity(), ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(getActivity(), "Please provide Location Permission to continue ", Toast.LENGTH_LONG).show();
return;
}
mFusedLocationClient.getLastLocation().addOnSuccessListener(getActivity(), new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
System.out.println("This is latitude:" + latitude);
}
}
});
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
private void requestPermission(){
ActivityCompat.requestPermissions(getActivity(),new String[]{ACCESS_FINE_LOCATION}, 1);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_test, container, false);
mRecyclerView = (RecyclerView)view.findViewById(R.id.planet_recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.addItemDecoration(new DividerItemDecoration(mRecyclerView.getContext(),DividerItemDecoration.VERTICAL));
adapter = new PlanetRecyclerViewAdapter(items, mRecyclerView.getContext());
mRecyclerView.setAdapter(adapter);
return view;
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}