Question

我有一个包含recyclerview的应用程序，代码正常运行，但当我想将Json解析为Android Studio时，数据会在列表中重复出现如何在数据来自互联网时解决这个问题但是当我使用普通的ListView时它工作得很好我正在使用相同的适配器

这是我的代码

private RecyclerView recyclerView;
private RecyclerViewAdapter recyclerView_dAdapter;
public List<List_Item> listItems = new ArrayList<>();
private GridLayoutManager gridLayoutManager;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    recyclerView = (RecyclerView) findViewById(R.id.m_RecyclerView);
    recyclerView.setHasFixedSize(true);

    gridLayoutManager = new GridLayoutManager(this, 1);
    recyclerView.setLayoutManager(gridLayoutManager);

    recyclerView_dAdapter = new RecyclerViewAdapter(listItems, this);
    recyclerView.setAdapter(recyclerView_dAdapter);

    recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {

            if (gridLayoutManager.findLastCompletelyVisibleItemPosition() == listItems.size() - 1) {
                Get_All_Users(listItems.get(listItems.size()-1).getId());
            }

        }
    });

    Get_All_Users(0);
}

public void Get_All_Users(int limit) {
    CheckInternetConnection cic = new CheckInternetConnection(getApplicationContext());
    Boolean Ch = cic.isConnectingToInternet();
    if (!Ch) {
        Toast.makeText(this, R.string.no_internet_connection, Toast.LENGTH_SHORT).show();
    } else {

        StringRequest stringRequest = new StringRequest(Request.Method.GET,
                "https://raw.githubusercontent.com/abodali/ox/master/f.txt?limit" + limit

                 ,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {

                            JSONArray jsonArray = new JSONArray(response);
                            JSONObject jsonResponse = jsonArray.getJSONObject(0);
                            JSONArray jsonArray_usersS = jsonResponse.getJSONArray("All_storys");

                            for (int i = 0; i < jsonArray_usersS.length(); i++) {
                                JSONObject responsS = jsonArray_usersS.getJSONObject(i);

                                int id = responsS.getInt("id");
                                String story = responsS.getString("story_name");
                                String img_link = responsS.getString("img_link");

                                listItems.add(new List_Item(id, story, img_link));

                            }
                            recyclerView_dAdapter.notifyDataSetChanged();


                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        });

        RequestQueue queue = Volley.newRequestQueue(this);
        queue.add(stringRequest);
        stringRequest.setShouldCache(false);


    }
}

}

亲切的问候

Answer 1

当您收到新回复时，您不会在添加新数据之前清除列表。我假设这就是你想要的。

所以在你的for循环之前，在那里添加一行将清除你的列表：

listItems.clear();

Recyclerview从Json重演

1 个答案: