Ich habe Code, um JSON-Daten mit Volley für die Kartenansicht und den Recycler zu analysieren. Ich möchte JSON-Daten in meinem Fragment anzeigen. Ich erhalte eine Fehlermeldung, weiß aber nicht, woran es liegt. Jeder kann mir vielleicht helfen, bitte.

Dies ist mein Fragment.

public class HomeFragment extends android.support.v4.app.Fragment {
  private static final String TAG = HomeActivity.class.getSimpleName();
  private ArrayList<ListItem> listItems;

  @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_home, container, false);

    ParseData();

    RecyclerView recyclerView = (RecyclerView) getActivity().findViewById(R.id.recycler_list);
    recyclerView.setHasFixedSize(true);
    recyclerView.setAdapter(new ListCardAdapter(listItems, R.layout.report_list_item));

    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    recyclerView.setLayoutManager(new GridLayoutManager(getActivity(),2));
    recyclerView.setItemAnimator(new DefaultItemAnimator());


    // Inflate the layout for this fragment
    return rootView;
}

private void ParseData(){
    JsonArrayRequest listReq = new JsonArrayRequest(AppConfig.URL_LIST,
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    Log.d(TAG, response.toString());

                    // Parsing json
                    for (int i = 0; i < response.length(); i++) {
                        try {

                            JSONObject obj = response.getJSONObject(i);
                            ListItem listItem = new ListItem();
                            listItem.setDesc(obj.getString("desc"));

                            String image = obj.isNull("image") ? null : obj.getString("image");
                            listItem.setImge(image);

                            // adding movie to movies array
                            listItems.add(listItem);

                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

                    }


                   ListCardAdapter.notifyDataSetChanged();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
        }
    });

    // Adding request to request queue
    VolleyController.getInstance().addToRequestQueue(listReq);
}

Dies ist mein Adapter.

public class ListCardAdapter extends RecyclerView.Adapter<ListCardAdapter.ViewHolder> {
private final String TAG = this.getClass().getSimpleName();
private List<TerbaruItem> terbaruItems;
private int itemLayout;
ImageLoader imageLoader = VolleyController.getInstance().getImageLoader();

public ListCardAdapter(List<ListItem> data, int itemLayout){
    listItems = data;
    this.itemLayout = itemLayout;
}

public static class ViewHolder extends RecyclerView.ViewHolder implements AdapterView.OnClickListener {

    public ReportImageView image;
    public TextView desc;

    public ViewHolder(View itemView) {

        super(itemView);

        itemView.setOnClickListener(this);
        image = (ReportImageView) itemView.findViewById(R.id.image);
        desc = (TextView) itemView.findViewById(R.id.desc);
    }

    @Override
    public void onClick(View view) {
        Toast.makeText(view.getContext(), "OnItemClick :D", Toast.LENGTH_SHORT).show();
    }

}

@Override
public ViewHolder onCreateViewHolder(ViewGroup  parent, int i) {

    View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(itemLayout, parent, false);
    ViewHolder viewHolder = new ViewHolder(itemLayoutView);
    return viewHolder;

}

@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {

    ListItem listItem = listItems.get(position);
    viewHolder.desc.setText(listItem.getDesc());


    // Feed image
    if (listItem.getImge() != null) {
        viewHolder.image.setImageUrl(listItem.getImge(), imageLoader);
        viewHolder.image.setVisibility(View.VISIBLE);
        viewHolder.image
                .setResponseObserver(new LaporanImageView.ResponseObserver() {
                    @Override
                    public void onError() {

                    }

                    @Override
                    public void onSuccess() {

                    }
                });
    } else {
        viewHolder.image.setVisibility(View.GONE);
    }


    viewHolder.itemView.setTag(terbaruItem);
}


@Override
public int getItemCount() {
    return listItems.size();
}
}

Und dieser Fehler beim Ausführen der App.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.company.report/com.company.report.activity.HomeActivity}: java.lang.NullPointerException
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
        at android.app.ActivityThread.access$600(ActivityThread.java:123)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4424)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.NullPointerException
        at id.co.aascenter.suarawarga.activity.HomeFragment.onCreateView(HomeFragment.java:126)
        at android.support.v4.app.Fragment.performCreateView(Fragment.java:1789)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:955)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
        at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
        at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
        at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:551)
        at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1133)
        at android.app.Activity.performStart(Activity.java:4475)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1929)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
        at android.app.ActivityThread.access$600(ActivityThread.java:123)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4424)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
        at dalvik.system.NativeStart.main(Native Method)