Question

我不能为我的生活找出为什么我的ExpandableListView不会扩展...我已经在我可以为ExpandableListView找到的每个点击监听器中使用了日志语句，它看起来不像任何一个得到调用。

我知道有很多关于这个主题的帖子但是我已经仔细阅读了所有内容并尝试了许多事情并且没有运气，希望我能错过一些很容易被其他人发现的小错误。

主要活动：

public class ForumListActivity extends Activity  {

    private static ArrayList<Forum> forumList;
    private static ArrayList<ArrayList<SubForum>> subForumList;
    private ExpandableListView forumListView;
    private ForumListAdapter forumListAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.main_page);
        this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

        forumListView = (ExpandableListView) this.findViewById(R.id.main_page_forum_list);

        forumList = new ArrayList<Forum>();
        subForumList = new ArrayList<ArrayList<SubForum>>();
        setUpForums(this);

        forumListAdapter = new ForumListAdapter(this, forumList, subForumList);
        forumListView.setAdapter(forumListAdapter);

        forumListView.setOnGroupExpandListener(new OnGroupExpandListener(){
            @Override
            public void onGroupExpand(int groupPosition) {
                Log.d("onGroupExpand", "this works?");
                for(int i=0; i<forumListAdapter.getGroupCount(); i++) {
                    if(i != groupPosition) 
                        forumListView.collapseGroup(groupPosition);
                }
            }
        });

        forumListView.setOnGroupClickListener(new OnGroupClickListener() {
            @Override
            public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
                Log.d("onGroupClick:", "worked");
                parent.expandGroup(groupPosition);
                return true;
            }
        });
    }

注意：方法setUpForums（）只接受系统数组并将它们放入forumList和subForumList

ListViewAdapter：

public class ForumListAdapter extends BaseExpandableListAdapter {

    private ArrayList<Forum> groups;
    private ArrayList<ArrayList<SubForum>> children;
    private Context ctx;

    public ForumListAdapter(Context ctx, ArrayList<Forum> groups, ArrayList<ArrayList<SubForum>> children) {
        this.ctx = ctx;
        this.groups = groups;
        this.children = children;
    }



    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return children.get(groupPosition).get(childPosition);
    }



    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }



    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater inflater = LayoutInflater.from(ctx);
            convertView = inflater.inflate(R.layout.forum_list_child_item_row, null);
        }

        SubForum currentSubForum = children.get(groupPosition).get(childPosition);
        TextView name = (TextView)convertView.findViewById(R.id.child_row_forum_title);
        TextView desc = (TextView)convertView.findViewById(R.id.child_row_forum_description);

        if (name != null)
            name.setText(currentSubForum.getName());

        if (desc != null)
            desc.setText(currentSubForum.getDescription());

        convertView.setFocusableInTouchMode(true);
        return convertView;
    }



    @Override
    public int getChildrenCount(int groupPosition) {
        return children.get(groupPosition).size();
    }



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



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



    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }



    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        if (convertView == null)
        {
            LayoutInflater inflater = LayoutInflater.from(ctx);
            convertView = inflater.inflate(R.layout.forum_list_group_item_row, null);
        }

        Forum currentForum = (Forum) groups.get(groupPosition);
        TextView name = (TextView) convertView.findViewById(R.id.group_item_forum_title);
        //ImageView image = (ImageView) convertView.findViewById(R.id.group_item_expander_image);

        if(name != null)
            name.setText(currentForum.getName());           

        /*
        if(image != null) {
            int[][] group_state_sets = {{}, {android.R.attr.state_expanded}};
            image.setVisibility(View.VISIBLE);  
            int stateSetIndex = (isExpanded ? 1 : 0) ;  
            Drawable drawable = image.getDrawable();  
            drawable.setState(group_state_sets[stateSetIndex]);  
        }
        */

        return convertView;
    }



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



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


}

组布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/turquoise_gradient"
    android:orientation="horizontal"
    android:paddingTop="6dip"
    android:paddingBottom="6dip"
    android:paddingLeft="6dip" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/turquoise_gradient"
        android:orientation="vertical"
        android:padding="2dip" >

        <TextView
            android:id="@+id/group_item_forum_title"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical|left"
            android:gravity="left"
            android:paddingLeft="5dip"
            android:textColor="@color/white"
            android:textSize="16dip" />

    </LinearLayout>

    <!--  
    <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        android:gravity="center|right">

        <ImageView
            android:id="@+id/group_item_expander_image"
            android:focusable="false"
            android:focusableInTouchMode="false"
            android:gravity="center"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:src="@drawable/collapse_down" />


    </LinearLayout> -->

</LinearLayout>

子布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/turquoise_gradient"
    android:orientation="horizontal"
    android:paddingTop="6dip"
    android:paddingBottom="6dip"
    android:paddingLeft="6dip" >


    <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="2dip"
        android:background="@drawable/turquoise_gradient" >

        <TextView
            android:id="@+id/child_row_forum_title"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="left"
            android:layout_gravity="center_vertical"
            android:paddingLeft="5dip"
            android:textColor="@color/white"
            android:maxLines="1"
            android:textSize="11dip"  />

         <TextView
            android:id="@+id/child_row_forum_description"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="left"
            android:layout_gravity="center_vertical"
            android:paddingLeft="15dip"
            android:textColor="@color/white"
            android:maxLines="2"
            android:textSize="11dip"  />

    </LinearLayout>

</LinearLayout>

主页面布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/black"
    android:orientation="vertical" >

    <ExpandableListView
        android:id="@+id/main_page_forum_list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="@color/black"
        android:divider="@color/black"
        android:dividerHeight="1dip"
        android:clickable="true" />

</LinearLayout>

非常感谢您提供的任何帮助！

Answer 1

我也遇到过像你这样的问题。经过几天的调查，我发现我做错了什么。所以我通过做一些小改动来修正它以正常工作。

让我们看看boolean onGroupClick(...)中setOnGroupClickListener的正文。您已返回 true ，表示"the click was handled"

如果要展开，则应返回false 。所以我建议你这样做：

forumListView.setOnGroupClickListener(new OnGroupClickListener() {
    @Override
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
            Log.d("onGroupClick:", "worked");
            parent.expandGroup(groupPosition);
            return false;
        }
    });

在android.widget.ExpandableListView类中，有一个名为boolean handleItemClick(View v, int position, long id)的方法，负责扩展/折叠组或将点击传递给正确的孩子。

 /* It's a group click, so pass on event */
         if (mOnGroupClickListener != null) {
             if (mOnGroupClickListener.onGroupClick(this, v,
                     posMetadata.position.groupPos, id)) {
                 posMetadata.recycle();
                 return true;
             }
         }

  /* expanding/collapsing/other tasks... */

如果您将onGroupClick实现为返回true ，则永远不会执行第8行以下的代码。（这意味着，群组永远不会崩溃，扩展）

希望我的回答能帮到你:-)祝你好运！

Answer 2

如果列表项上有小部件，例如Button，则可能需要向其添加android:focusable="false"。 Button不允许单击我的列表项。这就是我的问题。

Answer 3

您可能需要检查三件事，

检查你是否有任何可用于chid的数据，如果你没有任何数据，那么孩子根本不会出现。

2.在使用布局过热器时检查条件是否正确

 if (convertView == null) {
    LayoutInflater inflater = LayoutInflater.from(ctx);
    convertView = inflater.inflate(R.layout.forum_list_child_item_row, null);
    }

您还需要在此处传递Viewgroup

  convertView = inflater.inflate(R.layout.forum_list_child_item_row,parent, false);

Answer 4

确保您的自定义组布局没有android:textIsSelectable="false"为“true”，如果textview中的文本设置为可选，则可扩展列表视图将在姜饼中扩展但不会在软糖中扩展，并且可能在ICS中也不起作用

Answer 5

我知道这已经得到了回答，但是尝试设置任何你要膨胀的基本布局都有这个属性：

android:descendantFocusability="blocksDescendants"

Answer 6

如果你的可扩展listview父级有按钮或开关它没有被调用，我整天浪费在这里。所以只需使用下面的代码

android:focusable="false"
android:focusableInTouchMode="false"

Answer 7

我遇到了类似的问题，它是通过从xml上的ExpandableListView中删除android:clickable="true"属性来解决的。

Answer 8

将implements OnGroupExpandListener添加到您的活动中。然后它会工作。我使用相同它工作正常。

Answer 9

使用可扩展列表时，group expand是默认功能。意味着只有当你点击它时你才不会扩展自己，你不需要覆盖onGroupExpand（int groupPosition）或任何其他方法只需将你的数据填充到你的列表中就像这样：

   public class MyActivity extends Activity { 

  private ExpandableListView forumListView;
  private ForumListAdapter forumListAdapter;
  String[] forumList={"group 1","group 2","group 3"};
 String[][] subForumList={{"group 1 child1","group 1 child1","group 1 child3"},
                     {"group 2 child1","group 2 child2","group 2 child3"},
                     {"group 3 child1","group 3 child2","group 3 child3"},
                     };
     @Override
     public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.main);


forumListView = (ExpandableListView) this.findViewById(R.id.main_page_forum_list);




forumListAdapter = new ForumListAdapter(this, forumList, subForumList);
forumListView.setAdapter(forumListAdapter);



  /* forumListView.setOnGroupExpandListener(new OnGroupExpandListener(){
    public void onGroupExpand(int groupPosition) {
        Log.d("onGroupExpand", "this shit works?");
        for(int i=0; i<forumListAdapter.getGroupCount(); i++) {
            if(i != groupPosition) 
                forumListView.collapseGroup(groupPosition);
        }
    }
});

forumListView.setOnGroupClickListener(new OnGroupClickListener() {
     public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long  id) {
        Log.d("onGroupClick:", "worked");
        parent.expandGroup(groupPosition);
        return true;
    }
});*/
     }

    public class ForumListAdapter extends BaseExpandableListAdapter {

      String[] groups;
   String[][] children;
     private Context ctx;

   public ForumListAdapter(Context ctx, String[] groups, String[][] children) {
    this.ctx = ctx;
    this.groups = groups;
    this.children = children;
}

public Object getChild(int arg0, int arg1) {
    // TODO Auto-generated method stub
    return children[arg0][arg1];
}

public long getChildId(int arg0, int arg1) {
    // TODO Auto-generated method stub
    return arg1;
}

public View getChildView(int arg0, int arg1, boolean arg2, View arg3,
        ViewGroup arg4) {
    if (arg3 == null) {
        LayoutInflater inflater = LayoutInflater.from(ctx);
        arg3 = inflater.inflate(R.layout.child, null);
    }

    String childData = children[arg0][arg1];
    TextView name = (TextView)arg3.findViewById(R.id.child_row_forum_title);
    TextView desc = (TextView)arg3.findViewById(R.id.child_row_forum_description);

    if (name != null)
        name.setText(childData);

    if (desc != null)
       // desc.setText(currentSubForum.getDescription());

    arg3.setFocusableInTouchMode(true);
    return arg3;}

public int getChildrenCount(int arg0) {
    // TODO Auto-generated method stub
    return children[arg0].length;
}

public Object getGroup(int arg0) {
    // TODO Auto-generated method stub
    return groups[arg0];
}

public int getGroupCount() {
    // TODO Auto-generated method stub
    return groups.length;
}

public long getGroupId(int arg0) {
    // TODO Auto-generated method stub
    return arg0;
}

public View getGroupView(int arg0, boolean arg1, View arg2, ViewGroup arg3) {
    if (arg2 == null)
    {
        LayoutInflater inflater = LayoutInflater.from(ctx);
        arg2 = inflater.inflate(R.layout.group, null);
    }


    TextView name = (TextView) arg2.findViewById(R.id.group_item_forum_title);
    //ImageView image = (ImageView) arg2.findViewById(R.id.group_item_expander_image);

    if(name != null)
        name.setText(groups[arg0]);           

    /*
    if(image != null) {
        int[][] group_state_sets = {{}, {android.R.attr.state_expanded}};
        image.setVisibility(View.VISIBLE);  
        int stateSetIndex = (isExpanded ? 1 : 0) ;  
        Drawable drawable = image.getDrawable();  
        drawable.setState(group_state_sets[stateSetIndex]);  
    }
    */

    return arg2;}

public boolean hasStableIds() {
    // TODO Auto-generated method stub
    return false;
}

public boolean isChildSelectable(int arg0, int arg1) {
    // TODO Auto-generated method stub
    return false;
}
    }

       }

Answer 10

forumListView.collapseGroup（的 groupPosition ）;

应该是

forumListView.collapseGroup（的 I ）;

Answer 11

就我而言，我在组视图和子视图中都有按钮，甚至设置了android:focusable="false" android:focusableInTouchMode="false"都不起作用。

所以我不得不将它们从ImageButton更改为ImageView。点击的听众是相同的。您可能需要创建自定义背景，以为ImageView提供触摸动画。

android expandablelistview不会扩展或接收点击事件

11 个答案: