java - Android ExpandableListView 不展开/不可点击

Question

我是 android 编程的新手，并尝试实现一个基本的可扩展 ListView ，显示类(class)列表，单击时应显示一些其他详细信息。我觉得这个问题非常基本，因为我在任何 View 中都没有包含任何花哨的东西，但我仍然无法在网上找到解决方案，大多数其他问题都更加具体。

第一部分工作正常(显示类(class)列表)，问题是列表不可点击，这意味着它不会展开。

我现在确定的是:
1. getChildView 永远不会被调用(调试器永远不会在断点处停止)
2. 有 child 的数据，因为它与用于 groupheading 的数据相同，效果很好。

我还尝试设置一个从未调用过的 onGroupClickListener，所以我再次将其删除。

我的代码:

组标题布局:

    <TextView
        android:id="@+id/CourseName"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="bottom"
        android:text="CourseName"
        android:layout_weight="7"
        android:layout_marginRight="25dp"
        android:textAppearance="?android:attr/textAppearanceMedium" />


    <TextView
        android:id="@+id/CourseDate"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="bottom"
        android:layout_weight="3"
        android:text="CourseDate" />


    <CheckBox
        android:id="@+id/checkBox"
        style="?android:attr/starStyle"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1" />

</LinearLayout>

子行布局:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="Button" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/button1"
        android:text="Button" />

    <TextView
        android:id="@+id/phases"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:gravity="center"
        android:layout_below="@+id/button1"
        android:text="phases:" />

    <TextView
        android:id="@+id/info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/phases"
        android:gravity="center"
        android:text="information:" />

</RelativeLayout>

Activity 布局:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/sportName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:gravity="center"
        android:text="Sport Name"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="@dimen/profile_title" />

    <RatingBar
        android:id="@+id/ratingBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:numStars="5"
        android:stepSize="1"
        android:layout_centerInParent="true" />

    <ExpandableListView
        android:id="@+id/expandableListView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/sportName" >
    </ExpandableListView>

</RelativeLayout>

适配器java:

package ch.unibe.unisportbern.views.details;

import java.util.ArrayList;

import com.example.unisportbern.R;

import ch.unibe.unisportbern.support.Course;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;

public class SportsAdapter extends BaseExpandableListAdapter  {
    private Context context;
    private ArrayList<Course> courseList;



    public SportsAdapter(Context context, ArrayList<Course> courseList) {
        this.context = context;
        this.courseList = courseList;
    }



    @Override
    public Object getChild(int index, int stub) {
        return courseList.get(index);
    }

    @Override
    public long getChildId(int index, int stub) {
        return stub;
    }

    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {

        if (convertView == null){
            LayoutInflater inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
               convertView = inflater.inflate(R.layout.child_row, null);
        }

        TextView phases = (TextView) convertView.findViewById(R.id.phases);
        TextView info = (TextView) convertView.findViewById(R.id.info);

        phases.setText("phases:\n" + courseList.get(groupPosition).getPhases());
        info.setText(courseList.get(groupPosition).getInformation());

        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return 1;
    }

    @Override
    public Object getGroup(int groupPosition) {
        return courseList.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return courseList.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return courseList.get(groupPosition).getId();
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {

        if (convertView == null) {
               LayoutInflater inf = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
               convertView = inf.inflate(R.layout.group_heading, null);
              }

        TextView courseName = (TextView) convertView.findViewById(R.id.CourseName);
        TextView courseDate = (TextView) convertView.findViewById(R.id.CourseDate);

        courseName.setText(courseList.get(groupPosition).getName());
        courseDate.setText(courseList.get(groupPosition).getDay() + courseList.get(groupPosition).getTime());

        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return true;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }

}

Activity java:

package ch.unibe.unisportbern.views.details;

import java.util.ArrayList;

import com.example.unisportbern.R;

import ch.unibe.unisportbern.support.Course;
import ch.unibe.unisportbern.support.DBMethodes;
import ch.unibe.unisportbern.support.Sport;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ExpandableListView;

public class DActivity extends Activity{


    public final static String NAME = "SportName";
    public final static String ID = "SportID";

    private Sport sport;
    private ArrayList<Course> courses;
    private SportsAdapter sportsadapter;

    private ExpandableListView myList;

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

        getSport();
        getCourses();

        setContentView(R.layout.details_layout);

        myList = (ExpandableListView) findViewById(R.id.expandableListView);
        sportsadapter = new SportsAdapter(this, courses);
        myList.setAdapter(sportsadapter);
    }

    private void getCourses() {
        DBMethodes dbMethodes = new DBMethodes(this);
        try {
            courses = dbMethodes.getAllCourses(sport);
        } catch (Exception e) {
        }
    }

    private void getSport() {
        Intent intent = this.getIntent();
        int id = intent.getIntExtra(ID, 0);
        String name = intent.getStringExtra(NAME);
        this.sport = new Sport(id, name);
    }

}

提前致谢!

编辑:我偶然发现了它。 groupheader 中的复选框是可聚焦的，从列表中窃取了所有点击。要解决此问题，只需将列表中复选框/按钮的 focusable 属性设置为 false。

Answer 1

偶然发现的。 groupheader 中的复选框是可聚焦的，从列表中窃取了所有点击。要解决此问题，只需将列表中复选框/按钮的 focusable 属性设置为 false 即可:

在 Java 中:

checkbox.setFocusable(false);

或者，在 xml 中:

android:focusable="false"