java - 如何删除 ExpandableListView 中父子之间的特定空间

Question

你能帮我确定为什么小组和 child 之间有空间吗？在我的例子中，我希望所有组之间都有空格， child 应该在组的正下方没有空格(但当然是下一组的空间。我的问题是这样的:

我已将组分隔线设置为此可绘制对象 (expandable_list_group_divider):

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <size android:height="10dp"/>
</shape>

还有子分隔线(@drawable/expandable_list_child_divider):

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <size android:height="0dp"/>
</shape>

我在xml中定义了这样的布局(它是一个复合控件):

<com.jws.MyExpandableListView
        android:id="@+id/expList"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="5dp"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:scrollbars="none"
        android:divider="@drawable/expandable_list_group_divider"
        android:childDivider="@drawable/expandable_list_child_divider"/>

自定义 View 类:

public class MyExpandableListView extends ExpandableListView {
    protected ArrayList<Departure> departures;

    public MyExpandableListView(Context context, AttributeSet attrs) {
        super(context, attrs);

        setGroupIndicator(null);
        setChildIndicator(null);
        setHorizontalFadingEdgeEnabled(true);
        setVerticalFadingEdgeEnabled(true);
        setFadingEdgeLength(60);

        departures = new ArrayList<Departure>();
        this.setAdapter(new MyExpandableListAdapter(context, this, departures));
    }
}

最后是可扩展列表适配器

public class DeparturesExpandableListAdapter extends BaseExpandableListAdapter {
    private final int DIVIDER_HEIGHT = 20;
    private LayoutInflater inflater;
    private ArrayList<Departure> departures;
    private Context context;
    private ExpandableListView expListView;

    public DeparturesExpandableListAdapter(Context context, ExpandableListView expListView, ArrayList<Departure> departures)
    {
        this.context = context;
        inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
        this.departures = departures;
        this.expListView = expListView;
    }


    // This Function used to inflate parent rows view
    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parentView)
    {
        final Departure departure = departures.get(groupPosition);

        if(!isExpanded)
            expListView.setDividerHeight(DIVIDER_HEIGHT);
        else
            expListView.setDividerHeight(-4);

        expListView.setFooterDividersEnabled(false);

        // Inflate grouprow.xml file for parent rows
        convertView = inflater.inflate(R.layout.view_departure_overview, parentView, false);

        //Data handling in the view...

        return convertView;
    }


    // This Function used to inflate child rows view
    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
                             View convertView, ViewGroup parentView)
    {
        final Departure departure = departures.get(groupPosition);

        if(isLastChild)
            expListView.setDividerHeight(DIVIDER_HEIGHT);

        // Inflate childrow.xml file for child rows
        convertView = inflater.inflate(R.layout.view_departure_details, parentView, false);

        //Data handling...

        return convertView;
    }

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

    //Call when child row clicked
    @Override
    public long getChildId(int groupPosition, int childPosition)
    {
        return childPosition;
    }

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


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

    @Override
    public int getGroupCount()
    {
        if(departures != null)
            return departures.size();

        return 0;
    }

    //Call when parent row clicked
    @Override
    public long getGroupId(int groupPosition)
    {
        return groupPosition;
    }

    @Override
    public void notifyDataSetChanged()
    {
        // Refresh List rows
        super.notifyDataSetChanged();
    }

    @Override
    public boolean isEmpty()
    {
        return ((departures == null) || departures.isEmpty());
    }

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

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

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

评论图片:

Answer 1

这已经过测试并证明有效，我什至想在几个月后回到这个问题，因为没有其他方法能给我提供我想要的结果。这些显示的正是 OP(和我自己)想要的

这是我的群组或类别之类的。基本上第一个线性布局只是一个 View 的包装器，它充当类别之间的间隔，然后是另一个处理我所有格式的线性布局

在 ExpandableListView(未显示)中，我将分隔高度设置为 0。间距由 View 处理

<?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="wrap_content"
    android:orientation="vertical">

    <View
        android:layout_width="fill_parent"
        android:layout_height="6dp"
        android:background="@android:color/transparent"/>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="8dp"
    android:background="#50601CBA">


    <TextView
        android:id="@+id/lblListHeader"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:textSize="17dp"
        android:textColor="#FFFFFF" />

</LinearLayout>
</LinearLayout>

然后在 child 身上我有这个。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="55dip"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/lblListItem"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textSize="12sp"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:textColor="#FFFFFF"
        android:background="#50601CBA"
         />

</LinearLayout>