AutoCompleteTextView随机抛出IllegalStateException

Question

由于我的AutoCompleteTextView中的IllegalStateException，我一直收到一些关于我的Android应用程序崩溃的Play商店报告。 但是，我自己从未能够重新创建这个问题。 AutoCompleteTextView使用自定义过滤，我或多或少遵循这里的代码： AutoCompleteTextView中的自定义过滤不起作用

我已经对这个问题做了一些研究，发现这是结果之一： 如何解决“适配器的内容已经改变，但ListView没有收到通知”异常，但仍然无法解决我的代码有什么问题我甚至无法弄清楚是什么导致异常发生，它只是随机发生，虽然大部分时间都没有发生。更令人沮丧的是，异常堆栈跟踪没有指出我的代码哪一行导致异常。

这是异常堆栈跟踪：

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.AutoCompleteTextView$DropDownListView) with Adapter(class transponders.transmob.JourneyPlanner$LocationAdapter)]
at android.widget.ListView.layoutChildren(ListView.java:1541)
at android.widget.AbsListView.onLayout(AbsListView.java:1428)
at android.view.View.layout(View.java:7228)
at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
at android.view.View.layout(View.java:7228)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1148)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1868)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3691)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
at dalvik.system.NativeStart.main(Native Method)

这是自定义适配器类中的自定义过滤器代码：

        @Override
        public Filter getFilter() 
        {
            Filter filter = new Filter(){
                  @Override
                  protected FilterResults performFiltering(CharSequence constraint)
                  {
                      locations.clear();
                      FilterResults results = new FilterResults();
                      String typedText = ownerACTV.getText().toString();

                      try
                      {
                          Log.d("performFiltering", "TYPED TEXT LENGTH: " + typedText.length());
                          if(!typedText.equals("Current location"))
                          {
                              String url = "some URL";
                              request = new JSONRequest();
                              request.setListener(JourneyPlanner.this);
                              request.execute(url);

                              String result = request.get();

                              Object obj = JSONValue.parse(result);
                              JSONArray array = (JSONArray)((JSONObject)obj).get("Locations");

                              for(int i = 0; i < array.size(); i++)
                              {
                                  JSONObject location = (JSONObject) array.get(i);
                                  String desc = (String) location.get("Description");
                                  String id = (String) location.get("Id");

                                  Log.d("filterResults", "Description: " + desc);
                                  Log.d("filterResults", "ID: " + id);

                                  String[] splitted = desc.split(" \\(");
                                  if (splitted.length > 1)
                                      desc = splitted[0];

                                  locationsToID.put(desc, id);
                                  locations.add(desc);
                              }
                          }

                          results.values = locations;
                          results.count = locations.size();

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

                      Log.d("performFiltering", "return FilterResults");
                      return results;
                  }

                  @Override
                  protected void publishResults(CharSequence arg0, FilterResults results) 
                  {  
                      if (results != null && results.count > 0)
                      {
                         notifyDataSetChanged();
                      }
                      else
                      {
                          notifyDataSetInvalidated();
                      }
                  }
            };

            return filter;
        }

如有必要，我也可以给你代码的其他部分。 我必须打电话给网络以填充自动完成下拉列表，我猜它可能是导致异常的那个？

Answer 1

问题是您在非ui线程中修改的“位置”字段（perfornFiltering方法），您应该使用传递给publishResults的FilterResults

Answer 2

这是getFilter方法：工作正常

 @Override
 public Filter getFilter() {
 Filter filter = new Filter() {
    @Override
    protected FilterResults performFiltering(final CharSequence  constraint) {
        final FilterResults filterResults = new FilterResults();

       activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                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, final     FilterResults results) {
        try {
           activity.runOnUiThread(new Runnable() {
               @Override
               public void run() {
                   if (results != null && results.count > 0) {

                      // resultList=(ArrayList<String>)results.values;
                       notifyDataSetChanged();
                   } else {
                       notifyDataSetInvalidated();