android - 如何更改可扩展 ListView 项目的背景

Question

我有一个 ExpandableListView。当一个 child 被展开时，它应该被认为是“被选中的”。选择子项时，子项和子项的子项都应显示不同的背景(以向用户显示当前选择的项目)。

现在这就是我所拥有的:

XML

    <ExpandableListView
        android:id="@+id/listViewAccepted"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:choiceMode="singleChoice"
        android:listSelector="@drawable/custom_selector" >
    </ExpandableListView>

ListView

        setOnGroupClickListener(new OnGroupClickListener() {

            @Override
            public boolean onGroupClick(ExpandableListView parent, View view,int groupPosition, long id) {
                view.setSelected(true);
                parent.setItemChecked(groupPosition, true);
                return false;
            }
        });

选择器

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true">
        <shape>
            <solid android:color="@color/holo_blue_light" />
        </shape>
    </item>
    <item android:state_selected="true">
        <shape>
            <solid android:color="@color/green" />
        </shape>
    </item>
    <item android:state_checked="true">
        <shape>
            <solid android:color="@color/green" />
        </shape>
    </item>
    <item android:state_focused="true">
        <shape>
            <solid android:color="@color/green" />
        </shape>
    </item>
    <item android:state_activated="true">
        <shape>
            <solid android:color="@color/green" />
        </shape>
    </item>
    <item>
        <shape>
            <solid android:color="@color/transparent" />
        </shape>
    </item>
</selector>

Answer 1

我是这样做的，下面更改组 View 。覆盖的方法包含在我的自定义 ExpandableListAdapter 中。

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
        View view, ViewGroup parent)
{
    LinearLayout bevGroup = (LinearLayout) view.findViewById(R.id.myid);

    if(isExpanded)
    {
        bevGroup.setBackgroundColor(context.getResources().getColor(R.color.bgGroupBlack));
    }
    else
    {
        bevGroup.setBackgroundColor(context.getResources().getColor(R.color.bgTransparent));
    }
}

而 child ，只有在展开时才可见，始终是它应该是的颜色。