如何在fragment中成功实现android mapbox android sdk

我在一个带有底部导航的片段中使用mapbox,当我退出并恢复应用程序或快速更改选项卡时,应用程序崩溃。这就是我得到的错误

10-07 22:20:36.046 21867-21886/com.dropexpress.driver.dropexpressdriver E/Mbgl-FileSource: Failed to read the storage key: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.os.Bundle.getBoolean(java.lang.String, boolean)' on a null object reference at com.mapbox.mapboxsdk.storage.FileSource.getCachePath(FileSource.java:88) at com.mapbox.mapboxsdk.storage.FileSource$FileDirsPathsTask.doInBackground(FileSource.java:165) at com.mapbox.mapboxsdk.storage.FileSource$FileDirsPathsTask.doInBackground(FileSource.java:155) at android.os.AsyncTask$2.call(AsyncTask.java:304) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:243) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) at java.lang.Thread.run(Thread.java:761) 下面的代码总是失败,当我退出应用程序并继续,或当我改变标签迅速,我使用底部导航。

复制步骤

1. 这是我的片段代码

   package com.dropexpress.driver.dropexpressdriver.fragments;
   import android.content.Context;
   import android.net.Uri;
   import android.os.Bundle;
   import android.support.v4.app.Fragment;
   import android.view.LayoutInflater;
   import android.view.View;
   import android.view.ViewGroup;
   import android.widget.TextView;
   import com.dropexpress.driver.dropexpressdriver.R;
   import com.mapbox.mapboxsdk.Mapbox;
   import com.mapbox.mapboxsdk.maps.MapView;
       public class HomeFragment extends Fragment {
       private MapView mapView;
       private static final String ARG_PARAM1 = "param1";
       private static final String ARG_PARAM2 = "param2";
   
       private String mParam1;
       private String mParam2;
   
       private OnFragmentInteractionListener mListener;
   
       public HomeFragment() {
           // Required empty public constructor
       }
   
       /**
        * Use this factory method to create a new instance of
        * this fragment using the provided parameters.
        *
        * @param param1 Parameter 1.
        * @param param2 Parameter 2.
        * @return A new instance of fragment HomeFragment.
        */
       // TODO: Rename and change types and number of parameters
       public static HomeFragment newInstance(String param1, String param2) {
           HomeFragment fragment = new HomeFragment();
           Bundle args = new Bundle();
           args.putString(ARG_PARAM1, param1);
           args.putString(ARG_PARAM2, param2);
           fragment.setArguments(args);
           return fragment;
       }
   
       @Override
       public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           if (getArguments() != null) {
               mParam1 = getArguments().getString(ARG_PARAM1);
               mParam2 = getArguments().getString(ARG_PARAM2);
           }
       }
   
       @Override
       public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                Bundle savedInstanceState) {
           // Inflate the layout for this fragment
   
           View view = inflater.inflate(R.layout.fragment_home, container, false);
           Mapbox.getInstance(requireActivity(), "pk.eyJ1Ijoic3ludGF4bHRkIiwiYSI6ImNqaDJxNnhzbDAwNnMyeHF3dGlqODZsYjcifQ.pcz6BWpzCHeZ6hQg4AH9ww");
           mapView = (MapView) view.findViewById(R.id.mapView);
           mapView.onCreate(savedInstanceState);
   
           return  view;
       }
   
       // TODO: Rename method, update argument and hook method into UI event
       public void onButtonPressed(Uri uri) {
           if (mListener != null) {
               mListener.onFragmentInteraction(uri);
           }
       }
   
       @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;
       }
   
       /**
        * This interface must be implemented by activities that contain this
        * fragment to allow an interaction in this fragment to be communicated
        * to the activity and potentially other fragments contained in that
        * activity.
        * <p>
        * See the Android Training lesson <a href=
        * "http://developer.android.com/training/basics/fragments/communicating.html"
        * >Communicating with Other Fragments</a> for more information.
        */
       public interface OnFragmentInteractionListener {
           // TODO: Update argument type and name
           void onFragmentInteraction(Uri uri);
       }
       @Override
       public void onResume() {
           super.onResume();
           mapView.onResume();
       }
   
       @Override
       public void onPause() {
           super.onPause();
           mapView.onPause();
       }
   
       @Override
       public void onStop() {
           super.onStop();
           mapView.onStop();
       }
   
       @Override
       public void onLowMemory() {
           super.onLowMemory();
           mapView.onLowMemory();
       }
   
       @Override
       public void onSaveInstanceState(Bundle outState) {
           super.onSaveInstanceState(outState);
           mapView.onSaveInstanceState(outState);
       }
   
   }
   

Android版本: 5.0 + 摩托罗拉g5 6.5.0