片段中的SearchView错误

Question

SV（VARIABLE）是列表视图中提供过滤功能的搜索视图....应用程序退出加载...删除搜索视图代码后应用程序运行良好...请帮助..我我被困......

public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

            View v=inflater.inflate(R.layout.contactfragment,container,false);

            this.lstNames = (ListView) v.findViewById(R.id.lists);
            sv=(SearchView)v.findViewById(R.id.searchContactLIST);

            // Read and show the contacts
            showContacts();


            return v;

        }


        private void showContacts() {
            // Check the SDK version and whether the permission is already granted or not.
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && ContextCompat.checkSelfPermission(getActivity(),Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, PERMISSIONS_REQUEST_READ_CONTACTS);
                //After this point you wait for callback in onRequestPermissionsResult(int, String[], int[]) overriden method
            } else {
                // Android version is lesser than 6.0 or the permission is already granted.


                List<String> contacts = getContactNames();
                //  String[] arr_contact=contacts.to
                List<String> contacts_no = getContactNo();


                String[] strarray = new String[contacts.size()];
                contacts.toArray(strarray);


                String[] strarray2 = new String[contacts_no.size()];
                contacts_no.toArray(strarray2);


                // ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, contacts);
                // lstNames.setAdapter(adapter);

                adapter = new GetContactAdapter(getContext(), strarray, strarray2);

                lstNames.setAdapter(adapter);

            sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
                    @Override
                    public boolean onQueryTextSubmit(String text) {

                        return false;
                    }

                    @Override
                    public boolean onQueryTextChange(String newText) {

                        adapter.getFilter().filter(newText);

                        return false;
                    }
                });



            }
        }