我不知道为什么这个错误会出现在我的Android工作室中,但它会打扰我。
以下是代码,我编写的内容
// JSON parse class started from here.
private class GetHttpResponse extends AsyncTask<Void, Void, Void>
{
public Context context;
String JSonResult;
List<Student> studentList;
public GetHttpResponse(Context context)
{
this.context = context;
}
@Override
protected void onPreExecute()
{
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... arg0)
{
// Passing HTTP URL to HttpServicesClass Class.
HttpServicesClass httpServicesClass = new HttpServicesClass(HttpUrl);
try
{
httpServicesClass.ExecutePostRequest();
if(httpServicesClass.getResponseCode() == 200)
{
JSonResult = httpServicesClass.getResponse();
if(JSonResult != null)
{
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray(JSonResult);
JSONObject jsonObject;
Student student;
studentList = new ArrayList<>();
for(int i=0; i<jsonArray.length(); i++)
{
student = new Student();
jsonObject = jsonArray.getJSONObject(i);
// Adding Student Id TO IdList Array.
IdList.add(jsonObject.getString("id"));
//Adding Student Name.
student.NamaLatihan = jsonObject.getString("nama_latihan");
studentList.add(student);
}
}
catch (JSONException e) {
e.printStackTrace();
}
}
}
else
{
Toast.makeText(context, httpServicesClass.getErrorMessage(), Toast.LENGTH_SHORT).show();
}
}
catch (Exception e)
{
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result)
{
if(studentList != null) {
progressBar.setVisibility(View.GONE);
StudentListView.setVisibility(View.VISIBLE);
ListAdapterClass adapter = new ListAdapterClass(studentList, context);
StudentListView.setAdapter(adapter);
}else
{
Toast.makeText(context, "Tidak ada data ditampilkan", Toast.LENGTH_LONG).show();
}
}
}
有人知道如何修复此代码吗? 我尝试添加引用此https://stackoverflow.com/a/46166223的静态,但GetHttpResponse中的所有代码都会出错,请我帮忙