如何将JSON值设置为我的列表

Question

我的目的是让autoCompleteText以JSON格式从服务器获取值，并且我的文本框在类型字符后一秒发送请求然后显示我的JSON值，并且此autoCompleteText在Fragment中。

在此代码中：

  List<ProductGetSet> new_suggestions = null;
                                    try {
                    new_suggestions = jp.getParseJsonWCF(constraint.toString());
                } catch (IOException e) {
                    e.printStackTrace();
                                        }

new_suggestions没有得到String的值而且直接捕获然后我的List没有得到值但是约束有值

SearchAdapter.java

public class SearchAdapter extends ArrayAdapter<String> {

private Timer searchTimer;
private List<String> suggestions;
public SearchAdapter(Activity context, String nameFilter) {
    super(context, android.R.layout.simple_dropdown_item_1line);
   suggestions = new ArrayList<>();
}

@Override
public int getCount() {
    return suggestions.size();
}

@Override
public String getItem(int position) {
    return suggestions.get(position);
}

@Override
public Filter getFilter() {
    final Filter myFilter = new Filter() {

        @Override
        protected FilterResults performFiltering(final CharSequence constraint) {
            FilterResults filterResults = new FilterResults();
            final JsonParseProduct jp=new JsonParseProduct();
            if (constraint != null) {
                // A class that queries a web API, parses the data and
                // returns an ArrayList<GoEuroGetSet>

                searchTimer = new Timer();
                searchTimer.schedule(new TimerTask() {
                    @Override
                    public void run() {
                        try {
                            searchTimer.cancel();
                            searchTimer = null;
                        } catch (Exception e) {
                            Log.e("tmessages", e.toString());
                        }
                    }
                }, 200, 300);

                List<ProductGetSet> new_suggestions = null;
                                    try {
                    new_suggestions = jp.getParseJsonWCF(constraint.toString());
                } catch (IOException e) {
                    e.printStackTrace();
                                        }

                suggestions.clear();
                for (int i=0;i<new_suggestions.size();i++) {
                    suggestions.add(new_suggestions.get(i).getName());
                }

                // Now assign the values and count to the FilterResults
                // object
                filterResults.values = suggestions;
                filterResults.count = suggestions.size();
            }
            return filterResults;
}

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            if (results != null && results.count > 1  ) {
                notifyDataSetChanged();
            }
            else {
                notifyDataSetInvalidated();
            }
        }
    };
    return myFilter;
        }
    }

JsonParseProduct.java

public class JsonParseProduct {

public List<ProductGetSet> getParseJsonWCF(String sName) throws IOException {
    List<ProductGetSet> ListData = new ArrayList<ProductGetSet>();
    try {
        String temp = sName.replace("", "20%");
        URL js = new URL("http://webheavens.com/suggestion.php?name="+temp);
        URLConnection jc = js.openConnection();

        InputStream jStream = jc.getInputStream();

        InputStreamReader reader = new InputStreamReader(jStream);
        BufferedReader bufferedReader = new BufferedReader(reader);
        String line = bufferedReader.readLine();
        JSONObject jsonResponse = new JSONObject(line);
        JSONArray jsonArray = jsonResponse.getJSONArray("results");
        for (int i=0; i < jsonArray.length();i++){

            JSONObject r = jsonArray.getJSONObject(i);
            ListData.add(new ProductGetSet(r.getString("id"),r.getString("name")));
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }

return ListData;
    }
}

ProductFragment .java

public static ProductFragment newInstance(int page, String title) {
    ProductFragment fragment = new ProductFragment();
    Bundle args = new Bundle();
    args.putInt("someInt", page);
    args.putString("someTitle", title);
    fragment.setArguments(args);
    return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        page = getArguments().getInt("someInt", 0);
        title = getArguments().getString("someTitle");
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_product, container, false);
    acTextView = (AutoCompleteTextView) view.findViewById(R.id.autoComplete);

    this.mView = view;

    acTextView.setAdapter(new SearchAdapter(getActivity(), acTextView.getText().toString()));

    acTextView.addTextChangedListener(
            new TextWatcher() {
                @Override
                public void onTextChanged(CharSequence s, int start, int before, int count) {
                    new SearchAdapter(getActivity(), acTextView.getText().toString());
                }

                @Override
                public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                }

                private Timer timer = new Timer();
                private final long DELAY = 1000; // milliseconds

                @Override
                public void afterTextChanged(final Editable s) {
                    timer.cancel();
                    timer = new Timer();
                    timer.schedule(
                            new TimerTask() {
                                @Override
                                public void run() {

                                    // you will probably need to use runOnUiThread(Runnable action) for some specific actions
                                }
                            },
                            DELAY
                    );
                }
            }
    );
    acTextView.setAdapter(new SearchAdapter(getActivity(), acTextView.getText().toString()));
    return view;
}

我真的很困惑，请帮助我。