Question

我有一个微调器，我需要在sqlite数据库中填充子名称。我有一个方法来返回一个孩子的列表。

public List<ChildUser> getChildren() {
        List<ChildUser> childList = new ArrayList<ChildUser>();

        //select columns
        String[] tableColumns = new String[]{"id", "childname", "nickname"};

        Cursor cursor = db.query("child", tableColumns, "parent =? ", new String[]{_parentName}, null, null, null);
        cursor.moveToFirst();

        while (!cursor.isAfterLast()) {
            ChildUser child = new ChildUser();
            //take values from database
            child.setId(cursor.getInt(0));
            child.setChildName(cursor.getString(1));
            child.setNickName(cursor.getString(2));


            //add to db
            childList.add(child);

            cursor.moveToNext();
        }
        return childList;
    }

然后我从一个片段调用这个方法来填充一个微调器，但是，我得到了另一个显示的子列表属性，如何在微调器中显示我所选项的text属性？（请单击链接以查看我的微调器显示的确切内容）

 final ChildDataBase cdb = new ChildDataBase(getActivity());

        final List<ChildUser> childList = cdb.getChildren();



        Spinner spinner = (Spinner) v.findViewById(R.id.del_child_spinner);
        ArrayAdapter<ChildUser> spinnerAdapter = new ArrayAdapter<ChildUser>(getActivity(), android.R.layout.simple_spinner_item, childList);
        spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(spinnerAdapter);
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                childId = childList.get(position).getId();

                Toast succ = Toast.makeText(Home.super.getContext(), childList.get(position).getChildName() + " Selected.", Toast.LENGTH_SHORT);
                succ.show();


                return;
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                Toast succ = Toast.makeText(Home.super.getContext(), "No child selected.", Toast.LENGTH_SHORT);
                succ.show();
            }
        });

Spinner＆lt; ---点击此处查看微调器

我也有一个自定义列表适配器，我不知道我是否可以以某种方式应用它来完成这项任务。

/**
 * Created by Victor on 4/3/2016.
 */
public class ChildListAdapter extends ArrayAdapter<ChildUser> {

    private FragmentTransaction fragmentTransaction;
    private android.support.v4.app.FragmentManager fragmentManager;
    private final Context context;

    private final List<ChildUser> childList;

    public ChildListAdapter(Context context, List<ChildUser> childList){
        super(context, R.layout.fragment_child_list_layout, childList);//fragment_child_list
        this.context = context;
        this.childList= childList;
    }
    @Override
    public View getView(final int position, View convertView, ViewGroup parent){
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View rowView = inflater.inflate(R.layout.fragment_child_list_layout,parent,false);


        Button childName = (Button)rowView.findViewById(R.id.childButton);
        childName.setText(childList.get(position).getNickName());

        childName.setOnClickListener(new View.OnClickListener() {


            public void onClick(View v) {
                String selectedChild = childList.get(position).getChildName();
                // do something with selected item
                Toast fail = Toast.makeText(ChildListAdapter.super.getContext(), selectedChild + " selected", Toast.LENGTH_SHORT);
                fail.show();
                Globals._selectChild = selectedChild;
                TaskList taskList = new TaskList();
                fragmentTransaction = ((FragmentActivity)context).getSupportFragmentManager().beginTransaction();
                fragmentTransaction.replace(R.id.fragholder, taskList);
                fragmentTransaction.commit();

            }
        });


        return rowView;


    }




}

这是我的ChildUser对象

public class ChildUser {
    String childName;
    String nickName, gender, parent;
    int id, age;

    public void setChildName(String childName)
    {
        this.childName = childName;
    }
    public String getChildName()
    {
        return this.childName;
    }
    public void setNickName(String nickName)
    {
        this.nickName = nickName;
    }
    public String getNickName()
    {
        return this.nickName;
    }
    public void setGender(String gender)
    {
        this.gender = gender;
    }
    public String getGender()
    {
        return this.gender;
    }
    public void setParent(String parent)
    {
        this.parent = parent;
    }
    public String getParent()
    {
        return this.parent;
    }
    public void setId(int id)
    {
        this.id = id;
    }
    public int getId()
    {
        return this.id;
    }
    public void setAge(int age)
    {
        this.age = age;
    }
    public int getAge()
    {
        return this.age;
    }
}

Answer 1

您正在打印由类的toString（）方法返回的字符串。

您可以覆盖toString（）并返回正确的值，否则您将需要实现自己的自定义适配器，或者使用正确的属性构建字符串数组，而不是将模型列表传递给arrayAdapter。

最简单的方法是覆盖toString（）

public class ChildUser {
    String childName;
    String nickName, gender, parent;
    int id, age;

    @Override
    public String toString()
    {
        return this.childName;
    }
/*.......*/
}

希望这有帮助。

如何在微调器中列出列表项的text属性

1 个答案: