Question

我有一个可扩展的ListView，并希望更新放置在父组中的按钮内放置在子项内的视图（ImageView或ToggleButton）可见性。我已经成功地更新了孩子们内部其他视图的内容，但无法获得可见性。经过几个小时的挣扎，我来到这里。

这是我在Adapter类中的getChildView方法，它确实扩展了BaseExpandableListAdapter

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

    final NavDrawerItem children = (NavDrawerItem) getChild(groupPosition,
            childPosition);
    if (convertView == null) {

        convertView = inflater.inflate(R.layout.drawer_list_item, null);
        viewHolder = new ViewHolderItem();
        viewHolder.txtTitle = (TextView) convertView.findViewById(R.id.title);
        viewHolder.txtCount = (TextView) convertView.findViewById(R.id.counter);
        viewHolder.circleIcon = (CircleView) convertView.findViewById(R.id.icon);
        viewHolder.btnDelete = (ToggleButton) convertView.findViewById(R.id.btn_nav_delete);
        if (children.isDeleteBtnVisible())
            viewHolder.btnDelete.setVisibility(View.VISIBLE);
        else
            viewHolder.btnDelete.setVisibility(View.GONE);
        //viewHolder.headerImgIcon = (ImageView) parent.findViewById(R.id.iconHeader);
        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolderItem) convertView.getTag();

    }
    viewHolder.txtTitle.setText(children.getTitle());
    // Set custom font
    Typeface type = Typeface.createFromAsset(activity.getAssets(),TypeFaceUtility.getNavDrawerFont()); 
    viewHolder.txtTitle.setTypeface(type);

    viewHolder.circleIcon.circleFillColor = children.getIconColor();

    if (children.getCount() > 0){
        viewHolder.txtCount.setVisibility(View.VISIBLE);
        viewHolder.txtCount.setText("" + children.getCount());
    }else
        viewHolder.txtCount.setVisibility(View.GONE);
    return convertView;
}

GetGroupView方法

@Override
public View getGroupView(final int groupPosition, boolean isExpanded,
        View convertView, ViewGroup parent) {
    ViewHolderHeader viewHolder;
    final NavGroup group = (NavGroup) getGroup(groupPosition);
    final NavDrawerItem groupItem = group.navDrawerItem;
    if (convertView == null) {
        convertView = inflater.inflate(R.layout.drawer_list_header, null);
        viewHolder = new ViewHolderHeader();
        viewHolder.headerImgIcon = (ImageView) convertView.findViewById(R.id.iconHeader);
        viewHolder.txtTitle = (TextView) convertView
                .findViewById(R.id.title);

        viewHolder.txtCount = (TextView) convertView.findViewById(R.id.counter);
        viewHolder.iconExpand = (ImageView) convertView
                .findViewById(R.id.icon_expand);
        viewHolder.iconCollapse = (ImageView) convertView
                .findViewById(R.id.icon_collapse);
        viewHolder.btnNavSetting = (ToggleButton) convertView.findViewById(R.id.btn_nav_setting);
        viewHolder.btnNavSetting.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d("NavAdapter",groupItem.getTitle());
                enableDelete(groupPosition, true);

            }
        });
        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolderHeader) convertView.getTag();
    }

从组视图中调用的enableDelete方法

   private void enableDelete(int groupPosition, boolean enabled) {
    NavGroup group = (NavGroup) getGroup(groupPosition);
    for (int i = 0; i < group.children.size(); i++) {
            group.children.get(i).setDeleteBtnVisible(enabled);

    }
    notifyDataSetChanged();
}

儿童布局XML

 <TextView
    android:id="@+id/title"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_toRightOf="@id/icon"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:textAppearance="?android:attr/textAppearanceListItemSmall"
    android:textColor="@drawable/nav_drawer_listitem_textcolor_selector"
    android:gravity="center_vertical"
    android:paddingRight="40dp"/>
 <ToggleButton
    android:id="@+id/btn_nav_delete"
    android:layout_width="32dp"
    android:layout_height="32dp"
    android:layout_centerVertical="true"
    android:layout_toRightOf="@+id/title"
    android:contentDescription="@string/desc_list_item_icon"
    android:background="@drawable/ic_action_delete"
    android:textOff=""
    android:textOn="" 
    android:visibility="visible"/> 

<TextView
    android:id="@+id/counter"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_centerVertical="true"
    android:layout_marginRight="8dp"
    android:textColor="@drawable/nav_drawer_listitem_textcolor_selector" />

当用户触摸组中的btn_nav_setting时，我想要做什么，我想让子视图中的btn_nav_delete可见，并在组折叠时隐藏btn_nav_delete。任何帮助将受到高度赞赏。

Android：可扩展ListView - 更新子视图中的视图可见性

0 个答案: