java - 如何获取自定义适配器中每个微调器的状态

Question

我有一个自定义适配器，可以在其中显示文本和微调器。我尝试存储每个微调器的状态，以便在 Activity 再次打开时显示相同的项目，我尝试了不同的操作，但没有成功。请问我该如何完成这个谢谢。这是我最近尝试过的事情

    CustomListAdapter(Context context, ArrayList<String> subjects) {
    super(context, R.layout.custom_list_view, subjects);
}



@NonNull
@Override
public View getView(final int position, View convertView, ViewGroup parent) {

    LayoutInflater layoutInflater = LayoutInflater.from(getContext());
    View customView = layoutInflater.inflate(R.layout.custom_list_view, parent, false);

    singleSubject = getItem(position);


    TextView singleText = (TextView) customView.findViewById(R.id.listSubjectsMyCourses);
    colorLayout = (LinearLayout)customView.findViewById(R.id.colorForSubjects);
    relativeLayout = (RelativeLayout) 
   customView.findViewById(R.id.relativeForView);
    parentLayout = (RelativeLayout) 
   customView.findViewById(R.id.parentLayout);
    points = new ArrayList<>();
    selected = new ArrayList<>();
    selectedsttring = new ArrayList<>();
 customView.findViewById(R.id.textViewForGrades);
    tinyDB = new TinyDB(getContext());



         spinnerForGradePoints = (Spinner)customView.findViewById(R.id.spinnerForGrades);
    final ArrayAdapter<String> gradePointAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_dropdown_item_1line, UserCourseSelection2.userSubjectGradePoint);
    spinnerForGradePoints.setAdapter(gradePointAdapter);

    spinnerForGradePoints.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            selectedItempos = adapterView.getSelectedItemPosition();
            String getSelectedItem = adapterView.getItemAtPosition(i).toString();

            tinyDB.putInt("selected", selectedItempos);


        }



        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    });

  singleText.setText(singleSubject);
    colorLayout.setBackgroundColor(UserCourseSelection2.userSubjectsListColor.get(position));
    int getSelected = tinyDB.getInt("selected");
    spinnerForGradePoints.setSelection(getSelected);

   return customView;

}

Answer 1

如果您不想使用像 dagger 这样的依赖注入(inject)，那么 SharedPreferences 就是一种方法。或应用程序级别的某种自定义本地缓存。

对于微调器中的 SharedPreferences，请检查以下答案:

https://stackoverflow.com/a/13431729/5577679