Question

当我从localhost获取文本时，有时它会在textview中显示，有时则不会显示。
我不知道该怎么做，但我已经检查了所有本地主机服务器，数据库表它在邮递员工作正常。

但是，当我与 android 集成时，有时文字没有显示

public class BackGroundTask extends AsyncTask<RequestPackage, String, String> {
@Override
protected void onPreExecute() {
    super.onPreExecute();


}

@Override
protected String doInBackground(RequestPackage... params) {
    return RequestHttpURLConnection.getData(params[0]);
}

@Override
protected void onProgressUpdate(String... values) {
    super.onProgressUpdate(values);
}

@Override
protected void onPostExecute(String result) {
    JSONObject jsonObject = null;


        switch (gridItemId) {
            case 0:
                break;
            case 1: {
                Chairmen_textView.setText(result);
            }
            break;
            case 2: {
                Principal_textView.setText(result);
               }  break;

            case 3:   try  {


                JSONArray jsonArray = new JSONArray(result);
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObject1 = jsonArray.getJSONObject(i);
                    String trust_title = jsonObject1.getString("title");
                    String trust_content = jsonObject1.getString("trust_content");
                    String college_details = jsonObject1.getString("college_details");
                    Trust_title_textView.setText(trust_title);
                    Trust_content_textView.setText(trust_content);
                    College_details_textView.setText(college_details);
                }
               } catch (JSONException e) {
                e.printStackTrace();
            } break;


            case 4: try {

                JSONArray jsonArray = new JSONArray(result);
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObject1 = jsonArray.getJSONObject(i);
                    String management = jsonObject1.getString("title");
                    String headline = jsonObject1.getString("headline");
                    String powers = jsonObject1.getString("powers");
                    String name = jsonObject1.getString("name");
                    String member_title = jsonObject1.getString("member_title");
                    String member_content = jsonObject1.getString("member_content");
                    String end_line = jsonObject1.getString("end_line");

                    Management_textView.setText(management);
                    Headline_textView.setText(headline);
                    Power_textView.setText(powers);
                    Name_textView.setText(name);
                    Member_title_textView.setText(member_title);
                    Member_content_textView.setText(member_content);
                    End_line_textView.setText(end_line);
                }
              } catch (JSONException e) {
                e.printStackTrace();
            }   break;

            case 5: try {

                JSONArray jsonArray = new JSONArray(result);
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObject1 = jsonArray.getJSONObject(i);
                    String quality_title = jsonObject1.getString("title");
                    String subtitle_vision = jsonObject1.getString("subtitle_vision");
                    String subtitle_vision_content = jsonObject1.getString("vision_content");
                    String subtitle_mission = jsonObject1.getString("subtitle_mission");
                    String subtitle_mission_content = jsonObject1.getString("mission_content");
                    String subtitle_quality_policy = jsonObject1.getString("subtitle_quality_policy");
                    String subtitle_quality_policy_content = jsonObject1.getString("quality_policy_content");


                    Quality_Title_textView.setText(quality_title);
                    Subtitle_vision_textView.setText(subtitle_vision);
                    Subtitle_vision_content_textView.setText(subtitle_vision_content);
                    Subtitle_mission_textView.setText(subtitle_mission);
                    Subtitle_mission_content_textView.setText(subtitle_mission_content);
                    Subtitle_quality_policy_textView.setText(subtitle_quality_policy);
                    Subtitle_quality_policy_content_textView.setText(subtitle_quality_policy_content);


                }


          } catch (JSONException e) {
                e.printStackTrace();
            }      break;
            case 6:try {

                JSONArray jsonArray = new JSONArray(result);
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObject1 = jsonArray.getJSONObject(i);
                    String location_title = jsonObject1.getString("title");
                    String location_content = jsonObject1.getString("location_content");
                    Location_title.setText(location_title);
                    Location_content.setText(location_content);


                }

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


   }

Answer 1

首先，我将try catch块包裹在交换机周围，以避免代码重复。其次，您只是捕获jsonexception，尝试用更常见的异常替换此异常。也许这有帮助

从localhost服务器

1 个答案: