Question

我有一个场景，我必须将作为变量的userType传递给asyncTask。该变量包含以下两者之一： - 来自服务器的教师或学生。在AsyncTask中，如果userType = TEACHER，则会触发URL，如果userType = STUDENT，则会触发新的URL。

new GetIncidentsTask(IncidentsActivity.this).execute(userType);

从这里发送usertype。

现在在asyncTask我必须检查但不幸的是我不能

if (){
            String json = jsonParser.makeHttpRequest(CC.GETINCIDENTS_TEACHER, "GET",
                    null);
            String details = json.toString();
            Log.d("List of Incidents", details);
            }else {
                String json = jsonParser.makeHttpRequest(CC.GETINCIDENTS_STUDENT, "GET",
                        null);
                String details = json.toString();
                Log.d("List of Incidents", details);
            }

如何检查？我坚持了很长一段时间。请帮助。

Answer 1

@Override
    protected Integer doInBackground(Object... params) {
      Object obj= params[0];
      if(obj instance of Teacher)
      {
          // Teacher URL
      }
      else
      {
          // Student URL
      }

    }

Answer 2

    @Override
    protected String doInBackground(String... params) 
    {
          if (params[0].equals("TEACHER"))
          {
                String json = jsonParser.makeHttpRequest(CC.GETINCIDENTS_TEACHER, "GET",
                null); 
                String details = json.toString();
                Log.d("List of Incidents", details);
          }
          else
          {
                String json = jsonParser.makeHttpRequest(CC.GETINCIDENTS_STUDENT, "GET",
                    null); 
                String details = json.toString();
                Log.d("List of Incidents", details);
          }
    }

Answer 3

enum userType{
    student,
    teacher;
}

class MyData {
    userType type;
    //other data
}

//现在我假设“json”字符串包含您的预过滤数据

Gson gson = new Gson()
    MyData data = gson.fromJson(json, MyData.class);

    if (data.type==userType.teacher){
        String json = jsonParser.makeHttpRequest(CC.GETINCIDENTS_TEACHER, "GET",
                null);
        String details = json.toString();
        Log.d("List of Incidents", details);
        }
    else {
            String json = jsonParser.makeHttpRequest(CC.GETINCIDENTS_STUDENT, "GET",
                    null);
            String details = json.toString();
            Log.d("List of Incidents", details);
        }

Answer 4

将userType视为int或Integer

AsyncTask<Integer,Void,String> task = new AsyncTask<Integer, Void, String>() {
    @Override
    protected String doInBackground(Integer... params) {
          int userType = params[0];
          if(userType == STUDENT){

          }else{

          }
          return null;
    }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
    }
};
task.execute(STUDENT);

如何签入AsyncTask

4 个答案: