美好的一天，我有以下代码，我无法理解为什么我偶尔会收到上述错误消息。有时候我会得到它...有时候我不会，但我想摆脱它..我已经尝试了所有的东西（一些评论）和一些答案，但仍然有麻烦。请你好好看看它，并说出错的地方，因为我似乎无法注意到它。
public class SearchAutoCompleteAdapter extends BaseAdapter implements Filterable {
private ArrayList<BaseAutocompleteItems> resultList;
private LayoutInflater layoutInflater;
private Context context;
private int layout;
SearchAutoCompleteAPI searchautocomplete = new SearchAutoCompleteAPI(); //does API operation
public SearchAutoCompleteAdapter(Context context, int resource) {
super();
this.context = context;
this.layout = resource;
this.resultList = new ArrayList<BaseAutocompleteItems>();
}
@Override
public int getCount() {
return resultList.size();
}
@Override
public Object getItem(int index) {
return resultList.get(index);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(layout, null);
}
TextView name = (TextView) convertView.findViewById(R.id.suggestion_text_id);
TextView category = (TextView) convertView.findViewById(R.id.suggestion_category_text_id);
name.setText(resultList.get(position).getName());
category.setText(resultList.get(position).getCategoryName());
return convertView;
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
List<BaseAutocompleteItems> tempfilteredProducts;
//synchronized (filterResults) {
if (constraint != null || constraint.length() == 0) {
Log.d(SearchogHomeActivity.TAG, "characters in constraints is not null");
tempfilteredProducts = searchautocomplete.autocomplete(constraint.toString());
} else {
tempfilteredProducts = new ArrayList<BaseAutocompleteItems>();
}
filterResults.values = tempfilteredProducts;
filterResults.count = tempfilteredProducts.size();
return filterResults;
//}
}
@Override
protected void publishResults (CharSequence constraint, final FilterResults results){
//synchronized (results) {
resultList = (ArrayList<BaseAutocompleteItems>) results.values;
if (results != null && results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
// }
};
return filter;
}
}
这就是我在活动中使用它的地方：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_category);
textEdit = (AutoCompleteTextView)findViewById(R.id.search_autocomplete_id);
adapter = new SearchAutoCompleteAdapter(this, R.layout.autocomplete_list);
textEdit.setText("");
//textEdit.setThreshold(0);
textEdit.setOnItemClickListener(this);
textEdit.setAdapter(adapter);
这是我要求的日志：
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. Make sure your adapter calls notifyDataSetChanged() when its content changes. [in ListView(-1, class android.widget.ListPopupWindow$DropDownListView) with Adapter(class com.Example.searchAdapter.adapter.SearchAutoCompleteAdapter)]
at android.widget.ListView.layoutChildren(ListView.java:1562)
at android.widget.AbsListView.onLayout(AbsListView.java:2148)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
at android.view.View.layout(View.java:15596)
at android.view.ViewGroup.layout(ViewGroup.java:4966)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2072)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1829)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
API调用：
public ArrayList<BaseAutocompleteItems> autocomplete(String s){
//final ArrayList<BaseAutocompleteItems> myresultList = new ArrayList<BaseAutocompleteItems>();
//myresultList.clear();
String input = BASE_AUTOCOMPLETE_URL + s;
Log.d(SearchActivity.TAG, "AutoComplete string is " + input );
SearchRestClient.get(input, null, new JsonHttpResponseHandler(){
@Override
public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
super.onSuccess(statusCode, headers, response);
}
@Override
public void onSuccess(int statusCode, Header[] headers, JSONArray response) {
super.onSuccess(statusCode, headers, response);
ObjectMapper objectmapper = new ObjectMapper();
objectmapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
try {
//1
//List<BaseAutocompleteItems> autocompleteItems = objectmapper.readValue(String.valueOf(response), objectmapper.getTypeFactory().constructCollectionType(ArrayList.class, BaseAutocompleteItems.class));
myresultList = objectmapper.readValue(String.valueOf(response), objectmapper.getTypeFactory().constructCollectionType(ArrayList.class, BaseAutocompleteItems.class));
//2
/* myresultList.clear();
for(BaseAutocompleteItems items: autocompleteItems){
myresultList.add(items);
}*/
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
super.onFailure(statusCode, headers, throwable, errorResponse);
}
@Override
public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONArray errorResponse) {
super.onFailure(statusCode, headers, throwable, errorResponse);
}
});
Log.d(SearchActivity.TAG, "size in adapter is " + myresultList.size());
return myresultList;
}
答案 0 :(得分：1)
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();
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();
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
};
return filter;
}
public static ArrayList<String> autocomplete(String input) {
ArrayList<String> resultList = null;
HttpURLConnection conn = null;
StringBuilder jsonResults = new StringBuilder();
try {
StringBuilder sb = new StringBuilder(Constant.PLACES_API_BASE + Constant.TYPE_AUTOCOMPLETE + Constant.OUT_JSON);
sb.append("?key=AIzaSyAlU5QFZWbgInmPlV-LWFlXiRS7pZ8wD8o");
//sb.append("&components=country:au");
//sb.append("&location=" + String.valueOf(LocationHelperService.dblLatitude) + "," + String.valueOf(LocationHelperService.dblLongitude));
sb.append("&input=" + URLEncoder.encode(input, "utf8"));
sb.append("&radius=" + String.valueOf(50));
URL url = new URL(sb.toString());
System.out.println("URL: " + url);
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());
// 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", 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
JSONObject jsonObj = new JSONObject(jsonResults.toString());
JSONArray predsJsonArray = jsonObj.getJSONArray("predictions");
// Extract the Place descriptions from the results
resultList = new ArrayList<String>(predsJsonArray.length());
mainTextList=new ArrayList<String>(predsJsonArray.length());
secondoryTextList=new ArrayList<String>(predsJsonArray.length());
for (int i = 0; i < predsJsonArray.length(); i++) {
System.out.println(predsJsonArray.getJSONObject(i).getString("description"));
System.out.println("============================================================");
resultList.add(predsJsonArray.getJSONObject(i).getString("description"));
mainTextList.add(predsJsonArray.getJSONObject(i).getJSONObject("structured_formatting").getString("main_text"));
if(predsJsonArray.getJSONObject(i).getJSONObject("structured_formatting").has("secondary_text"))
{
secondoryTextList.add(predsJsonArray.getJSONObject(i).getJSONObject("structured_formatting").getString("secondary_text"));
}
else{
secondoryTextList.add("");
}
}
} catch (JSONException e) {
Log.e(LOG_TAG, "Cannot process JSON results", e);
}
return resultList;
}
答案 1 :(得分：0)
经过大量的研究和调试后，我解决了同样的问题。 您可以从here
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