java - 从 json 文件加载数据后，android 中的进度条没有停止

Question

在尝试了很多次之后没有成功，我正在从数据库中以 json 格式检索数据并在 android 的 recyclerview 中显示。一旦显示数据，进度条就不会停止或不会变得不可见。只有进度条不起作用mainactivity.java

`protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btnDatePicker = (Button) findViewById(R.id.btn_date);
    MobileProgressBar = (ProgressBar)findViewById(R.id.progressBar);
    loadRecyclerViewData();`



`private void loadRecyclerViewData(){

    //to fetch data we do string request
    StringRequest stringRequest = new StringRequest(Request.Method.GET,
            URL_Data,
            new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            try {
                //JSONObject jsonObject=new JSONObject(s);
               // JSONArray array=jsonObject.getJSONArray("contact");//Array name

                //converting the string to json array object

                JSONArray array = new JSONArray(response);
                //JSONArray arr=array.getJSONArray("Array");

                for(int i=0;i< array.length();i++){
                    //getting product object from json array

                    JSONObject jsonObjec = array.getJSONObject(i);

                    ListUser user=new ListUser(
                            jsonObjec.getString("name"),
                            jsonObjec.getString("email"),
                            jsonObjec.getString("contactno"),
                            jsonObjec.getString("date"),
                            jsonObjec.getString("time"),
                            jsonObjec.getString("requirement_type"),
                            jsonObjec.getString("message")

                    );

                            listUsers.add(user);

                }



               adapter=new MyAdapter(listUsers, getApplicationContext());//data from MyAdapter constructor
                recyclerView.setAdapter(adapter);

            }

            catch (JSONException e) {
                e.printStackTrace();
            }
        }
    },

            new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError  volleyError) {

            Toast.makeText(getApplicationContext(), volleyError.getMessage(), Toast.LENGTH_SHORT).show();
        }
    });

    RequestQueue requestQueue= Volley.newRequestQueue(this);

    requestQueue.add(stringRequest);
    MobileProgressBar.setVisibility(View.GONE);
}`

有人想帮忙

Answer 1

设置适配器后尝试此操作 MobileProgressBar.setVisibility(View.GONE);

 adapter=new MyAdapter(listUsers, getApplicationContext());//data from 
 MyAdapter constructorrecyclerView.setAdapter(adapter);
 MobileProgressBar.setVisibility(View.GONE);