AutocompleteTextView 错误：IllegalStateException：适配器的内容已更改但 ListView 未收到通知

Question

在 AutocompleteTextView 上取消或快速键入时，此类中出现 IllegalStateException 错误。我已经阅读了一些相关的内容，但我无法解决这个问题。任何人都可以更正我的代码？

提前感谢任何帮助！（对不起，我的英语不好）

这是完整的错误：

java.lang.IllegalStateException: The content of the adapter has changed but ListView did      not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(-1, class android.widget.ListPopupWindow$DropDownListView) with Adapter(class com.turkeys.planandgo.Activity.MapActivity$AutoComplete)]

这是我的课：

public class AutoComplete extends ArrayAdapter<String> implements Filterable {
    private static final String LOG_TAG = "carEgiri";

    private static final String PLACES_API_BASE = "https://maps.googleapis.com/maps/api/place";
    private static final String TYPE_AUTOCOMPLETE = "/autocomplete";
    private static final String OUT_JSON = "/json";

    private static final String API_KEY = "AIzaSyCDycjwe51YuMe7Sx8nHv9Z6C-kBGPEQ64";

    private ArrayList<String> resultList;

    private ArrayList<String> autocomplete(String input) {
            ArrayList<String> resultList = null;

            HttpURLConnection conn = null;
            StringBuilder jsonResults = new StringBuilder();
            try {
                StringBuilder sb = new StringBuilder(PLACES_API_BASE + TYPE_AUTOCOMPLETE + OUT_JSON);
                sb.append("?sensor=false&key=" + API_KEY);
                sb.append("&input=" + URLEncoder.encode(input, "utf8"));

                URL url = new URL(sb.toString());
                conn = (HttpURLConnection) url.openConnection();
                InputStreamReader in = new InputStreamReader(conn.getInputStream());
                Log.d("====", "Requesst send");
                // Load the results into a StringBuilder
                int read;
                char[] buff = new char[1024];
                while ((read = in.read(buff)) != -1) {
                    jsonResults.append(buff, 0, read);
                }
            } catch (MalformedURLException e) {
                Log.e(LOG_TAG, "Error processing Places API URL", e);
                return resultList;
            } catch (IOException e) {
                Log.e(LOG_TAG, "Error connecting to Places API", e);
                return resultList;
            } finally {
                if (conn != null) {
                    conn.disconnect();
                }
            }

            try {
                // Create a JSON object hierarchy from the results
                Log.d("JSON","Parsing resultant JSON :)");
                JSONObject jsonObj = new JSONObject(jsonResults.toString());
                JSONArray predsJsonArray = jsonObj.getJSONArray("predictions");

                // Extract the Place descriptions from the results
                resultList = new ArrayList<String>(predsJsonArray.length());
                Log.d("JSON","predsJsonArray has length " + predsJsonArray.length());
                for (int i = 0; i < predsJsonArray.length(); i++) {

                    resultList.add(predsJsonArray.getJSONObject(i).getString("description"));
                    Log.d("JSON",resultList.get(i));
                }
            } catch (JSONException e) {
                Log.e(LOG_TAG, "Cannot process JSON results", e);
            }

            return resultList;
        }

    public AutoComplete(Context context, int textViewResourceId) {
        super((Context) context, textViewResourceId);
    }

    @Override
    public int getCount() {
        if (resultList == null)
            return 0;
        return resultList.size();
    }

    @Override
    public String getItem(int index) {
        return resultList.get(index);
    }

    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {
                @Override
                protected FilterResults performFiltering(CharSequence constraint) {
                    FilterResults filterResults = new FilterResults();
                    if (constraint != null) {
                        // Retrieve the autocomplete results.
                        resultList = autocomplete(constraint.toString());

                        // Assign the data to the FilterResults
                        filterResults.values = resultList;
                        filterResults.count = resultList.size();
                    }
                    return filterResults;
                }

                @Override
                protected void publishResults(CharSequence constraint,FilterResults results) {
                    if (results != null && results.count > 0) {
                        notifyDataSetChanged();
                    } else {
                        notifyDataSetInvalidated();
                    }
                }
        };
        return filter;
    }

}

Answer 1

请从方法中删除 resultList performFiltering。performFiltering方法在后台线程中运行。这里有更清晰的信息！