在 expandableListView 中使用选中的复选框更改项目的位置

Question

在我的 ExpandableListView 中，我有一些项目类别。每个项目的末尾都有一个复选框。当我单击此复选框时，状态应更改为已选中，然后该项目应移至列表末尾的另一个（硬编码）类别。应该像我在原始类别中那样选中复选框。

我在示例中找到的移动项目的方法。但是在新类别中未选中项目复选框。相反，移动项目的旧位置上的项目将在原始类别中被选中（无需点击）。

示例（o 表示未选中；x 表示选中）：

启动应用后：

类别 1
item1 o
item2 o
item3 o
类别 2
item4 o

点击类别 1 中项目 1 的复选框后

类别 1
item2 x
item3 o
类别 2
item4 o
硬编码类别
item1 o

这是我的适配器-Class

    public class MyCustomAdapter extends BaseExpandableListAdapter {

    private LayoutInflater inflater;
    private ArrayList<Parent> mParent;
    private Context Kontext;
    private int count = 0;
    Children child;
    private CheckBox childCheckBox;


    public MyCustomAdapter(Context context, ArrayList<Parent> parent) {
        mParent = parent;
        inflater = LayoutInflater.from(context);
        Kontext = context;
    }

    @Override
    //counts the number of group/parent items so the list knows how many times calls getGroupView() method
    public int getGroupCount() {
        return mParent.size();
    }

    @Override
    //counts the number of children items so the list knows how many times calls getChildView() method
    public int getChildrenCount(int groupPosition) {
        Log.e("EXPANDABLE LIST", "GROUP " + groupPosition + " " + mParent.get(groupPosition).getArrayChildren()
                .size() + "");
        return mParent.get(groupPosition).getArrayChildren().size();
    }

    @Override
    //gets the title of each parent/group
    public Object getGroup(int i) {
        return mParent.get(i).getTitle();
    }

    @Override
    //gets the name of each item
    public Object getChild(int i, int i1) {
        return mParent.get(i).getArrayChildren().get(i1);
    }

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

    @Override
    public long getChildId(int i, int i1) {
        return i1;
    }

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

    @Override
    public int getChildTypeCount() {
        return 6;
    }

    @Override
    //in this method you must set the text to see the parent/group on the list
    public View getGroupView(int groupPosition, boolean b, View convertView, ViewGroup viewGroup) {

        ViewHolder holder = new ViewHolder();
        holder.groupPosition = groupPosition;

        if (convertView == null) {
            convertView = inflater.inflate(R.layout.list_item_parent, viewGroup, false);
            holder.groupTitle = (TextView) convertView.findViewById(R.id.list_item_text_view);

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.groupTitle.setText(getGroup(groupPosition).toString());

        //return the entire view
        return convertView;
    }

    @Override
    //in this method you must set the text to see the children on the list
    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup viewGroup) {

        final ViewHolderChild holder;
        child = mParent.get(groupPosition).getArrayChildren().get
                (childPosition);

        if (convertView == null) {
            holder = new ViewHolderChild();
            convertView = inflater.inflate(R.layout.child_list_layout, viewGroup, false);
            holder.childTitle = (TextView) convertView.findViewById(R.id.list_item_text_child);
            holder.childCheckBox = (CheckBox) convertView.findViewById((R.id.cbListItemChild));

            convertView.setTag(holder);
        } else {
            holder = (ViewHolderChild) convertView.getTag();
        }

        holder.childTitle.setText(mParent.get(groupPosition).getArrayChildren().get(childPosition).getArtikelName());

        convertView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(Kontext.getApplicationContext(), "gekauft : " +mParent.get(groupPosition).getArrayChildren().get
                        (childPosition).gekauft
                        + "", Toast.LENGTH_SHORT).show();


            }
        });

        holder.childCheckBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(Kontext.getApplicationContext(), "You have selected item : " +mParent.get(groupPosition).getArrayChildren().get
                        (childPosition).name
                        + "", Toast.LENGTH_SHORT).show();

                addChildToGroup(mParent.get(groupPosition).getArrayChildren().get
                        (childPosition), mParent.size() - 1, "Parent 25 (Hardcoded)");
                removeChildFromGroup(groupPosition, childPosition);
                notifyDataSetChanged();

            }
        });


        //return the entire view
        return convertView;
    }

    @Override
    public boolean isChildSelectable(int i, int i1) {
        return true;
    }

    public void removeGroup(int groupPosition) {
        mParent.remove(groupPosition);
        Log.e("removeGroup", "group size " + mParent.size());
        notifyDataSetChanged();
    }

    /**
     * Removes child at childPosition from group at groupPosition. If it is the last child in group
     * the group will also be deleted.
     *
     * @param groupPosition Position of the group in which the child exists
     * @param childPosition Position of the child in the group
     */
    public void removeChildFromGroup(int groupPosition, int childPosition) {
        Parent parent = mParent.get(groupPosition);

        parent.getArrayChildren().remove(childPosition);

        if (parent.getArrayChildren().isEmpty()) {
            removeGroup(groupPosition);
        } else {
            notifyDataSetChanged();
        }
    }

    public void addChildToGroup(Children childName, int groupPosition, String sectionTitle) {
        Parent parent = mParent.get(groupPosition);
        List<Children> arrayChildren = parent.getArrayChildren();


        if (!parent.getTitle().equals(sectionTitle)) {
            parent = new Parent();
            arrayChildren = new ArrayList<>();

            parent.setTitle(sectionTitle);

            mParent.add(parent);
        }

        arrayChildren.add(childName);
        parent.setArrayChildren(arrayChildren);
        notifyDataSetChanged();
    }


    protected class ViewHolder {
        protected int groupPosition;
        protected TextView groupTitle;
        protected TextView childTitle;
    }

    private class ViewHolderChild {

        TextView childTitle;
        CheckBox childCheckBox;
        View viewDivider;
    }}

有人可以帮忙解决这个问题吗？感谢所有抽出时间的人。

Answer 1

试试这个

1.InsideChildrenclass,添加一个布尔变量保存勾选状态：

public class Children {
    private boolean checked = false;
    //
    // Original codes of the Children class.
    //
}

2.Change getChildView(),根据保存的checked状态设置CheckBox:

@Override
//in this method you must set the text to see the children on the list
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup viewGroup) {

    final ViewHolderChild holder;
    child = mParent.get(groupPosition).getArrayChildren().get
            (childPosition);

    if (convertView == null) {
        holder = new ViewHolderChild();
        convertView = inflater.inflate(R.layout.child_list_layout, viewGroup, false);
        holder.childTitle = (TextView) convertView.findViewById(R.id.list_item_text_child);
        holder.childCheckBox = (CheckBox) convertView.findViewById((R.id.cbListItemChild));

        convertView.setTag(holder);
    } else {
        holder = (ViewHolderChild) convertView.getTag();
    }

    holder.childTitle.setText(mParent.get(groupPosition).getArrayChildren().get(childPosition).getArtikelName());
    holder.childCheckBox.setChecked(child.checked); // Added.

    convertView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(Kontext.getApplicationContext(), "gekauft : " +mParent.get(groupPosition).getArrayChildren().get
                    (childPosition).gekauft
                    + "", Toast.LENGTH_SHORT).show();


        }
    });

    holder.childCheckBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(Kontext.getApplicationContext(), "You have selected item : " +mParent.get(groupPosition).getArrayChildren().get
                    (childPosition).name
                    + "", Toast.LENGTH_SHORT).show();

            child = mParent.get(groupPosition).getArrayChildren().get(childPosition); // Added.
            child.checked = !child.checked; // Added.
            addChildToGroup(child, mParent.size() - 1, "Parent 25 (Hardcoded)"); // Changed.
            removeChildFromGroup(groupPosition, childPosition);
            notifyDataSetChanged();

        }
    });


    //return the entire view
    return convertView;
}

希望对您有所帮助！

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