Android 上的 Volley JsonArray 不能低于 5 个正确

Question

我在应用程序中使用Volley库。我使用一种方法通过意图将自己从活动 A 转移到活动 B。

     StringURL             StringURL
 --------------   intent  --------------
 | Activity A |  >---->>  | Activity B |     
 --------------           --------------
mystring url ====> http://www.articler.ir/android_php/search.php?Method=rate&CAT=مهندسی%20عمران

然后在活动 B 中，我使用服务器从服务器接收内容，但显然，这些内容在 Android 上接收不到 5 个空。请准确地指导我在哪里。我再次将这个问题放在此链接中 列表视图没有显示任何棒棒糖版本并找到根本问题，但我不明白为什么Android 4.4中服务器的响应为空。但在Android 5+上也是如此。如何解决问题？请帮助我，再次感谢你。

安卓 5-

安卓 5+

在活动 B 中：

public class FragmentOne extends Fragment {
    private List<Model> myList = new ArrayList<Model>();
    private  ArrayList<String> authors;
    private  ArrayList<String> keywords;
    String FirstURL ;
    String SearchURL;
//my stirng url ===> 
// http://www.articler.ir/android_php/search.php?Method=rate&CAT=مهندسی%20عمران 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_one, container, false);
        final SwipeRefreshLayout swipeRefreshLayout = rootView.findViewById(R.id.fm_one);
        final CustomListAdapter adapter = new CustomListAdapter(getActivity(),  myList);
        final ListView listView1 = (ListView) rootView.findViewById(R.id.myList1);
        Intent intent = getActivity().getIntent();
        FirstURL = intent.getStringExtra("SearchURL");
        SearchURL = FirstURL.replaceAll(" ", "%20");
        Log.d("Search", "Search: " + SearchURL);
        myList.removeAll(myList);
        swipeRefreshLayout.setRefreshing(true);

        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(SearchURL, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
                Log.d("VolleyRes", "response: " + response);
                for (int i = 0; i < response.length(); i++) {
                    try {
                        JSONObject jsonObject = response.getJSONObject(i);
                        Model model = new Model();
                        model.setTitle(jsonObject.getString("title"));
                        model.setMainText(jsonObject.getString("mainText"));
                        model.setrate(jsonObject.getDouble("rate"));
                        model.setYear(jsonObject.getInt("year"));
                        model.setConfName(jsonObject.getString("confName"));
                        model.setProductId(jsonObject.getInt("productId"));
                        model.setCountView(jsonObject.getInt("countView"));
                        model.setPdfURL(jsonObject.getString("pdfURL"));
                        // authors is json array
                        authors = new ArrayList<String>();
                        JSONArray authorArray = jsonObject.getJSONArray("authors");
                        for (int j = 0; j < authorArray.length(); j++) {
                            if (!authors.contains(authorArray.getString(j)) && !authorArray.isNull(j)) {
                                authors.add((String) authorArray.get(j));
                            }
                        }
                        model.setAuthor(authors);
                        // Keywords is json array
                        keywords = new ArrayList<String>();
                        JSONArray keywordArray = jsonObject.getJSONArray("Keywords");
                        for (int k = 0; k < keywordArray.length(); k++) {
                            if (!keywords.contains(keywordArray.getString(k)) && !keywordArray.isNull(k)) {
                                keywords.add((String) keywordArray.get(k));
                            }
                        }
                        model.setKeywords(keywords);
                        myList.add(model);
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
                listView1.setAdapter(adapter);
                adapter.notifyDataSetChanged();
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                VolleyLog.d("VolleyErr", "ErrorMassage: " + error.getMessage());
            }
        });
        AppController.getInstance().addToRequestQueue(jsonArrayRequest);
        swipeRefreshLayout.setRefreshing(false);



        listView1.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                swipeRefreshLayout.setRefreshing(true);
                int year = myList.get(position).getYear();
                int productId = myList.get(position).getProductId();
                int countView = myList.get(position).getCountView();
                double rate = myList.get(position).getrate();
                String title = myList.get(position).getTitle();
                String mainText = myList.get(position).getMainText();
                String confName = myList.get(position).getConfName();
                ArrayList authors = myList.get(position).getAuthor();
                ArrayList keywords = myList.get(position).getKeywords();
                String pdfURL = myList.get(position).getPdfURL();

                SharedPreferences prefs = PreferenceManager.
                        getDefaultSharedPreferences(getContext());
                SharedPreferences.Editor editor = prefs.edit();
                editor.putInt("productId", productId); //InputString: from the EditText
                editor.putInt("countView", countView);
                editor.putFloat("rate", (float) rate);
                editor.putString("pdfURL",pdfURL);
                editor.putString("title",title);
                editor.putString("mainText",mainText);
                editor.putString("confName",confName);
                editor.putString("authors", String.valueOf(authors));
                editor.putString("keywords", String.valueOf(keywords));
                editor.putInt("year", year);
                editor.commit();

                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        swipeRefreshLayout.setRefreshing(false);
                        Intent intent = new Intent(getContext(),DetailActivity.class);
                        startActivity(intent);
                        // finish();
                    }
                }, 1500);
            }
        });
        swipeRefreshLayout.setOnRefreshListener(
         new SwipeRefreshLayout.OnRefreshListener(){
             @Override
             public void onRefresh() {
                 ((MyTabActivity)getActivity()).refreshNow();
                 Toast.makeText(getContext(), "بروزرسانی صفحه!", Toast.LENGTH_SHORT).show();
             }
         });

        return rootView;
    }

}

我的应用控制器：

public class AppController extends Application {
    public static final String TAG = AppController.class.getSimpleName();
    private RequestQueue mRequestQueue;
    private static AppController mInstance;
    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;
    }
    public static synchronized AppController getInstance() {
        return mInstance;
    }
    public RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            mRequestQueue = Volley.newRequestQueue(getApplicationContext());
        }
        return mRequestQueue;
    }
    public <T> void addToRequestQueue(Request<T> req, String tag) {
        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
        getRequestQueue().add(req);
    }
    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }
    public void cancelPendingRequests(Object tag) {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(tag);
        }
    }
}

Answer 1

我意识到不支持 Android 上波斯语字体小于 5 的 URL。所以我需要通过编码来更改字符串，所以我使用下面的方法来更改它。

//this is initial string url ====> http://www.articler.ir/android_php/search.php?Method=rate&CAT=مهندسی%20عمران
String MyKey = مهندسی عمران;
final String EncodeKey= URLEncoder.encode(MyKey , "UTF-8");
String EncodeURL = " http://www.articler.ir/android_php/search.php?Method=rate&CAT= " + EncodeKey;

更改此部分后，我的响应是正确的，例如5+版本;