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我在回收站視圖和卡片視圖中遇到問題。我正在使用asynctask從API獲取信息，現在我只能獲得一個名稱 - 這意味着我僅在我的卡片視圖中顯示文本視圖。然而，當我加載列表時，它非常緩慢。在日誌貓中，我可以看到應用程序獲取數據的速度非常快，但在回收站視圖中顯示它需要很長時間。使用卡片視圖在回收站視圖中加載文本太慢
我添加了幾個樣本 - 從回收站視圖的適配器和持有回收視圖的片段。也許我在適配器中做了錯誤的事情。
謝謝你的幫助！
適配器：
public class PlacesListAdapter extends RecyclerView.Adapter<PlacesListAdapter.ListViewHolder>{
ArrayList<PlaceItem> items;
Context context;
public PlacesListAdapter(Context context,ArrayList<PlaceItem> placeItems){
this.context = context;
this.items = placeItems;
}
public void swap(ArrayList<PlaceItem> places){
items.clear();
items.addAll(places);
notifyDataSetChanged();
}
@Override
public ListViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(context).inflate(R.layout.card_view, parent, false);
return new ListViewHolder(v);
}
@Override
public void onBindViewHolder(ListViewHolder holder, int position) {
PlaceItem item = items.get(position);
holder.bindData(item);
}
@Override
public int getItemCount() {
return items.size();
}
public class ListViewHolder extends RecyclerView.ViewHolder{
TextView title;
PlaceItem placeItem;
public ListViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.txtTitlePlace);
}
public void bindData(PlaceItem item){
this.placeItem = item;
title.setText(placeItem.getTitle());
}
}
}
片段：
public class FragmentListPlaces extends Fragment implements View.OnClickListener {
ArrayList<PlaceItem> placeItems;
PlacesListAdapter adapter;
RecyclerView list;
EditText editName;
public FragmentListPlaces() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_list_places, container, false);
editName = (EditText) v.findViewById(R.id.editPlaceName);
v.findViewById(R.id.btnGetLocations).setOnClickListener(this);
v.findViewById(R.id.btnSearchByText).setOnClickListener(this);
placeItems = new ArrayList<>();
placeItems.add(new PlaceItem("Example"));
adapter = new PlacesListAdapter(getContext(), placeItems);
list = (RecyclerView) v.findViewById(R.id.placesList);
list.setLayoutManager(new LinearLayoutManager(getContext()));
list.setAdapter(adapter);
return v;
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btnGetLocations:
GetUserLocation location = new GetUserLocation();
location.getLocation(getActivity());
adapter.swap(placeItems);
break;
case R.id.btnSearchByText:
// this is the method loading data with user input
String getNameFromUser = editName.getText().toString();
searchPlaceByText(getNameFromUser);
adapter.swap(placeItems);
break;
}
}
public void searchPlaceByText(String place){
// instantiate the asynctask here
LocationDetailsByText locationDetailsByText = new LocationDetailsByText(placeItems);
locationDetailsByText.execute("http://api.v3.factual.com/t/places-il?q=" + place + "&KEY=AFvDryDJmPkkgXohbpFdqkRQelT9w0HKtyEqXy3G");
}
從網絡加載數據：
public class LocationDetailsByText extends AsyncTask<String, Void, String> {
ArrayList<PlaceItem> placeItems = new ArrayList<>();
public LocationDetailsByText(ArrayList<PlaceItem> places){
this.placeItems = places;
}
@Override
protected String doInBackground(String... params) {
StringBuilder result = new StringBuilder();
BufferedReader reader;
HttpURLConnection connection = null;
URL url;
String query = (params[0]);
try {
url = new URL(query);
connection = (HttpURLConnection)url.openConnection();
if(connection.getResponseCode() != 200){
return "Error!";
}
reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line = "";
while((line = reader.readLine())!= null){
result.append(line);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
connection.disconnect();
}
return result.toString();
}
@Override
protected void onPostExecute(String s) {
PlaceItem placeItem;
try {
JSONObject root = new JSONObject(s);
JSONObject response = root.getJSONObject("response");
JSONArray data = response.getJSONArray("data");
for(int i = 0; i < data.length(); i++){
JSONObject getData = data.getJSONObject(i);
String title = getData.getString("name");
placeItem = new PlaceItem(title);
placeItems.add(placeItem);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
你可以看到這個問題：使用Android的圖像cardview正在加載很懶惰而（http://stackoverflow.com/questions/33796166/android-while-using-cardview-image-is-loading-very-lazy ） –
嗨， 這個問題主要是與images..but處理我只使用文本視圖，它仍然加載速度非常slow..i找不到在論壇的任何答案，所以我想我做的這裏有什麼不對，但只是不能注意到它。這個問題正在放慢我的項目進度。 – Eran
我也不斷收到這條線在日誌貓： W /查看：）requestLayout（由android.support.v7.widget.AppCompatTextView不當叫{3c56a6c7 V.ED .... ...... ID 222,45-366,118＃7f0c0076 app：id/drawer_item_text}佈局過程中：運行第二個佈局傳遞 這是什麼意思？ – Eran