android - ParseQueryAdapter，不显示结果

Question

我正在尝试在我的项目中使用 ParseQueryAdapter，但没有任何运气显示结果。

我的目标是从 ParseUser 获取数据。所以，我的模型正在扩展 ParseUser:

所以我有一个模型:

@ParseClassName("Midwifefirm")
public class Midwifefirm extends ParseUser {



    public Midwifefirm() {
        // A default constructor is required.
    }

    //practice name
    public String getPracticeName() {
        return getString("practicename");
    }

    public void setPracticeName(String title) {
        put("title", title);
    }

    //education

    public String getEducation() {
        return getString("education");
    }

    public void setEducation(String education) {
        put("education", education);
    }

    //years in practice

    public String getYearsinPractice() {
        return getString("yearsinpractice");
    }

    public void setYearsinPractice(String yearsinpractice) {
        put("yearsinpractice", yearsinpractice);
    }

    //practice philosophy

    public String getPracticePhilosophy() {
        return getString("practicephilosophy");
    }

    public void setPracticePhilosophy(String practicephilosophy) {
        put("practicephilosophy", practicephilosophy);
    }

适配器在这里；我认为问题可能出在我的查询上:

public class CustomMidwifeAdapter extends ParseQueryAdapter<Midwifefirm> {


    public CustomMidwifeAdapter(Context context) {
        //query using Midwifefirm class, to get list of midwives
        super(context, new ParseQueryAdapter.QueryFactory<Midwifefirm>() {
            public ParseQuery<Midwifefirm> create() {

                ParseQuery query = new ParseQuery("Midwifefirm");
                query.whereEqualTo("userType", "midwife");


                return query;

            }


        });

    }

    @Override
    public View getItemView(Midwifefirm midwifefirm, View view, ViewGroup parent) {

        if (view == null) {
            view = View.inflate(getContext(), R.layout.activity_midwife_result_list, null);

        }

        //use midwifefirm as item view/list

        super.getItemView(midwifefirm, view, parent);


        // find in layout the practice name
        TextView titleTextView = (TextView) view.findViewById(R.id.practicename);

        //in the midwifefirm data model, call getPracticename
        titleTextView.setText(midwifefirm.getPracticeName());

        // Add education view
        TextView EducationView = (TextView) view.findViewById(R.id.education);

        EducationView.setText(midwifefirm.getEducation());

        // Add yearsexperience view
        TextView ExperienceView = (TextView) view.findViewById(R.id.yearsinpractice);
        ExperienceView.setText(midwifefirm.getYearsinPractice());

        //Add practice philosophy view
        TextView PracticePhilosophyView = (TextView) view.findViewById(R.id.practicephilosophy);
        PracticePhilosophyView.setText(midwifefirm.getPracticePhilosophy());


        return view;
    }

}

这是我的 ListView；

public class MidwifeResultList extends ListActivity {


    private ParseQueryAdapter<Midwifefirm> mainAdapter;

    private CustomMidwifeAdapter midwifeListAdapter;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //set display to listview, empty
        getListView().setClickable(false);




        //initialize main ParseQueryAdapter
        mainAdapter = new ParseQueryAdapter<Midwifefirm>(this, Midwifefirm.class);
        mainAdapter.setTextKey("practicename");
        mainAdapter.setTextKey("education");
        mainAdapter.setTextKey("yearsinpractice");
        mainAdapter.setTextKey("practicephilosophy");


        // Initialize the subclass of ParseQueryAdapter
        midwifeListAdapter = new CustomMidwifeAdapter(this);


        setListAdapter(mainAdapter);

        // Initialize ListView and set initial view to mainAdapter
       // listView = (ListView) findViewById(R.id.lvMidwives);
      //  listView.setAdapter(mainAdapter);
      //  mainAdapter.loadObjects();

    }





}

我可能设置错了..感谢任何见解。

Answer 1

仅从您提供的内容来看，我认为这与您的查询有关。您正在查询键“userType”，但您的子类 Midwifefirm 似乎没有该键。

编辑

要回答您的评论，您将使用如下查询获取所有 Midwife 对象:

ParseQuery<Midwifefirm> query = ParseQuery.getQuery(Midwifefirm.class); 
/* add any additional constraints to your query here */ 
query.findInBackground(new FindCallback<Midwifefirm>() { 
    @Override
    public void done(List<Midwifefirm> results, ParseException e) {

    } 
}

我相信 Parse 对您可以通过单个查询获得的对象数量有 100 个限制，因此您可能需要寻找可以增加该数量以满足您需求的方法。