android RecycleView实现多级树形列表

本文实例为大家分享了android RecycleView实现多级树形列表的具体代码，供大家参考，具体内容如下

实现多级树状列表：

1. Node.java

public class Node implements Serializable {
    /**
     * 传入的实体对象
     */
    public B bean;
    /**
     * 设置开启的图片
     */
    public int iconExpand = -1;
    /**
     * 设置关闭的图片
     */
    public int iconNoExpand = -1;
 
    private T id;
    /**
     * 根节点pId为0
     */
    private T pId;
 
    private String name;
 
    /**
     * 当前的级别
     */
    private int level;
 
    /**
     * 是否展开
     */
    private boolean isExpand = false;
 
    private int icon = -1;
 
    /**
     * 下一级的子Node
     */
    private List children = new ArrayList<>();
 
    /**
     * 父Node
     */
    private Node parent;
    /**
     * 是否被checked选中
     */
    private boolean isChecked;
    /**
     * 是否为新添加的
     */
    public boolean isNewAdd = true;
    /**
     * 单选标记
     */
    public boolean isSingle;
 
    /**
     * 支部code
     */
    public String braCode;
 
    public Node(T id, T pId, String name) {
        super();
        this.id = id;
        this.pId = pId;
        this.name = name;
    }
 
    public Node(T id, T pId, String name, B bean) {
        super();
        this.id = id;
        this.pId = pId;
        this.name = name;
        this.bean = bean;
    }
 
    public String getBraCode() {
        return braCode;
    }
 
    public void setBraCode(String braCode) {
        this.braCode = braCode;
    }
 
    public boolean isSingle() {
        return isSingle;
    }
 
    public void setSingle(boolean single) {
        isSingle = single;
    }
 
    public boolean isChecked() {
        return isChecked;
    }
 
    public void setChecked(boolean isChecked) {
        this.isChecked = isChecked;
    }
 
    public Node() {
    }
 
    public int getIcon() {
        return icon;
    }
 
    public void setIcon(int icon) {
        this.icon = icon;
    }
 
    public T getId() {
        return id;
    }
 
    public void setId(T id) {
        this.id = id;
    }
 
    public T getpId() {
        return pId;
    }
 
    public void setpId(T pId) {
        this.pId = pId;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public void setLevel(int level) {
        this.level = level;
    }
 
    public boolean isExpand() {
        return isExpand;
    }
 
    public List getChildren() {
        return children;
    }
 
    public void setChildren(List children) {
        this.children = children;
    }
 
    public Node getParent() {
        return parent;
    }
 
    public void setParent(Node parent) {
        this.parent = parent;
    }
 
    /**
     * 是否为跟节点
     *
     * @return
     */
    public boolean isRoot() {
        return parent == null;
    }
 
    /**
     * 判断父节点是否展开
     *
     * @return
     */
    public boolean isParentExpand() {
        if (parent == null){
            return false;
        }
        return parent.isExpand();
    }
 
    /**
     * 是否是叶子界点
     *
     * @return
     */
    public boolean isLeaf() {
        return children.size() == 0;
    }
 
    /**
     * 获取level
     */
    public int getLevel() {
        return parent == null ? 0 : parent.getLevel() + 1;
    }
 
    /**
     * 设置展开
     *
     * @param isExpand
     */
    public void setExpand(boolean isExpand) {
        this.isExpand = isExpand;
        if (!isExpand) {
            for (Node node : children) {
                node.setExpand(false);
            }
        }
    }
}

2. OnTreeNodeClickListener.java

public interface OnTreeNodeClickListener {
    /**
     * 点击事件方法
     * @param node 节点
     * @param position 条目位置
     */
    void onClick(Node node, int position);
}

3. TreeHelper.java

public class TreeHelper {
    /**
     * 传入node  返回排序后的Node
     *
     * @param datas              传入数据
     * @param defaultExpandLevel 默认展开等级
     * @return
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     */
    public static List getSortedNodes(List datas, int defaultExpandLevel) {
        List result = new ArrayList();
        // 设置Node间父子关系
        List nodes = convetData2Node(datas);
        // 拿到根节点
        List rootNodes = getRootNodes(nodes);
        // 排序以及设置Node间关系
        for (Node node : rootNodes) {
            addNode(result, node, defaultExpandLevel, 1);
        }
        return result;
    }
 
    /**
     * 过滤出所有可见的Node
     *
     * @param nodes
     * @return
     */
    public static List filterVisibleNode(List nodes) {
        List result = new ArrayList();
 
        for (Node node : nodes) {
            // 如果为跟节点，或者上层目录为展开状态
            if (node.isRoot() || node.isParentExpand()) {
                setNodeIcon(node);
                result.add(node);
            }
        }
        return result;
    }
 
    /**
     * 设置Node间，父子关系;让每两个节点都比较一次，即可设置其中的关系
     */
    private static List convetData2Node(List nodes) {
        for (int i = 0; i < nodes.size(); i++) {
            Node n = nodes.get(i);
            for (int j = i + 1; j < nodes.size(); j++) {
                Node m = nodes.get(j);
                //判断id是String，Integer
                if (m.getpId() instanceof String) {
                    if (m.getpId().equals(n.getId())) {
                        n.getChildren().add(m);
                        m.setParent(n);
                    } else if (m.getId().equals(n.getpId())) {
                        m.getChildren().add(n);
                        n.setParent(m);
                    }
                } else if(m.getpId() instanceof Integer) {
                    //这里就是修改的地方，因为这是Integer类，节点的地址是不一样的，所以不能直接使用==比较，要用equals()进行值的比较
                    if (m.getpId().equals(n.getId())) {
                        n.getChildren().add(m);
                        m.setParent(n);
                    } else if (m.getId().equals(n.getpId())) {
                        m.getChildren().add(n);
                        n.setParent(m);
                    }
                }
            }
        }
        return nodes;
    }
 
    /**
     * 获取所有根节点
     *
     * @param nodes
     * @return
     */
    private static List getRootNodes(List nodes) {
        List root = new ArrayList();
        for (Node node : nodes) {
            if (node.isRoot()) {
                root.add(node);
            }
        }
        return root;
    }
 
    /**
     * 把一个节点上的所有的内容都挂上去
     */
    private static  void addNode(List nodes, Node node,
                                       int defaultExpandLeval, int currentLevel) {
        nodes.add(node);
        //判断添加新节点的时候，保持以前的状态不变
        if (node.isNewAdd && defaultExpandLeval >= currentLevel) {
            node.setExpand(true);
        }
 
        if (node.isLeaf()) {
            //判断是子节点
            return;
        }
        for (int i = 0; i < node.getChildren().size(); i++) {
            addNode(nodes, node.getChildren().get(i), defaultExpandLeval,
                    currentLevel + 1);
        }
    }
 
    /**
     * 设置节点的图标
     *
     * @param node
     */
    private static void setNodeIcon(Node node) {
        if (node.getChildren().size() > 0 && node.isExpand()) {
            node.setIcon(node.iconExpand);
        } else if (node.getChildren().size() > 0 && !node.isExpand()) {
            node.setIcon(node.iconNoExpand);
        } else {
            node.setIcon(-1);
        }
    }
}

4. TreeRecyclerAdapter.java -----RecycleView形式的树形列表适配器

public abstract class TreeRecyclerAdapter extends RecyclerView.Adapter {
 
    protected Context mContext;
    /**
     * 存储所有可见的Node
     */
    protected List mNodes = new ArrayList<>();
    protected LayoutInflater mInflater;
 
    /**
     * 存储所有的Node
     */
 
    protected List mAllNodes = new ArrayList<>();
 
    /**
     * 点击的回调接口
     */
    private OnTreeNodeClickListener onTreeNodeClickListener;
    /**
     * 默认不展开
     */
    private int defaultExpandLevel = 0;
 
    /**
     * 展开与关闭的图片
     */
    private int iconExpand = -1, iconNoExpand = -1;
    /**
     * 当前被点击的位置
     */
    private int layoutPosition = -1;
 
    public void setOnTreeNodeClickListener(OnTreeNodeClickListener onTreeNodeClickListener) {
        this.onTreeNodeClickListener = onTreeNodeClickListener;
    }
 
    public TreeRecyclerAdapter(RecyclerView mTree, Context context, List datas,
                               int defaultExpandLevel, int iconExpand, int iconNoExpand) {
 
        this.iconExpand = iconExpand;
        this.iconNoExpand = iconNoExpand;
 
        for (Node node : datas) {
            node.getChildren().clear();
            node.iconExpand = iconExpand;
            node.iconNoExpand = iconNoExpand;
        }
 
        this.defaultExpandLevel = defaultExpandLevel;
        mContext = context;
        /**
         * 对所有的Node进行排序
         */
        mAllNodes = TreeHelper.getSortedNodes(datas, defaultExpandLevel);
        /**
         * 过滤出可见的Node
         */
        mNodes = TreeHelper.filterVisibleNode(mAllNodes);
        mInflater = LayoutInflater.from(context);
    }
 
    /**
     * @param mTree
     * @param context
     * @param datas
     * @param defaultExpandLevel 默认展开几级树
     */
 
    public TreeRecyclerAdapter(RecyclerView mTree, Context context, List datas,
                               int defaultExpandLevel) {
        this(mTree, context, datas, defaultExpandLevel, -1, -1);
    }
 
    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
        Node node = mNodes.get(position);
//        convertView = getConvertView(node, position, convertView, parent);
        // 设置内边距
        int padding = DisplayUtil.dp2px(mContext,5);
        holder.itemView.setPadding(DisplayUtil.dp2px(mContext,(node.getLevel()+1) * 15),
                padding,padding,padding);
 
        //然后设置单选，修改如下
        /**
         * 设置节点点击时，可以展开以及关闭,将事件继续往外公布
         */
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //获取当前点击的位置
                layoutPosition = holder.getLayoutPosition();
                expandOrCollapse(position);
 
                if (onTreeNodeClickListener != null) {
                    onTreeNodeClickListener.onClick(mNodes.get(position),
                            position);
                }
            }
        });
 
        if(position == layoutPosition){
            node.setSingle(true);
        }else {
            node.setSingle(false);
        }
 
        onBindViewHolder(node, holder, position);
    }
 
    @Override
    public int getItemCount() {
        return mNodes.size();
    }
 
    /**
     * 清除掉之前数据并刷新  重新添加
     *
     * @param mlists
     * @param defaultExpandLevel 默认展开几级列表
     */
    public void addDataAll(List mlists, int defaultExpandLevel) {
        mAllNodes.clear();
        addData(-1, mlists, defaultExpandLevel);
    }
 
    /**
     * 在指定位置添加数据并刷新 可指定刷新后显示层级
     *
     * @param index
     * @param mlists
     * @param defaultExpandLevel 默认展开几级列表
     */
    public void addData(int index, List mlists, int defaultExpandLevel) {
        this.defaultExpandLevel = defaultExpandLevel;
        notifyData(index, mlists);
    }
 
    /**
     * 在指定位置添加数据并刷新
     *
     * @param index
     * @param mlists
     */
    public void addData(int index, List mlists) {
        notifyData(index, mlists);
    }
 
    /**
     * 添加数据并刷新
     *
     * @param mlists
     */
    public void addData(List mlists) {
        addData(mlists, defaultExpandLevel);
    }
 
    /**
     * 添加数据并刷新 可指定刷新后显示层级
     *
     * @param mlists
     * @param defaultExpandLevel
     */
    public void addData(List mlists, int defaultExpandLevel) {
        this.defaultExpandLevel = defaultExpandLevel;
        notifyData(-1, mlists);
    }
 
    /**
     * 添加数据并刷新
     *
     * @param node
     */
    public void addData(Node node) {
        addData(node, defaultExpandLevel);
    }
 
    /**
     * 添加数据并刷新 可指定刷新后显示层级
     *
     * @param node
     * @param defaultExpandLevel
     */
 
    public void addData(Node node, int defaultExpandLevel) {
        List nodes = new ArrayList<>();
        nodes.add(node);
        this.defaultExpandLevel = defaultExpandLevel;
        notifyData(-1, nodes);
    }
 
    /**
     * 刷新数据
     *
     * @param index
     * @param mListNodes
     */
    private void notifyData(int index, List mListNodes) {
        for (int i = 0; i < mListNodes.size(); i++) {
            Node node = mListNodes.get(i);
            node.getChildren().clear();
            node.iconExpand = iconExpand;
            node.iconNoExpand = iconNoExpand;
        }
        for (int i = 0; i < mAllNodes.size(); i++) {
            Node node = mAllNodes.get(i);
            node.getChildren().clear();
            node.isNewAdd = false;
        }
        if (index != -1) {
            mAllNodes.addAll(index, mListNodes);
        } else {
            mAllNodes.addAll(mListNodes);
        }
        /**
         * 对所有的Node进行排序
         */
        mAllNodes = TreeHelper.getSortedNodes(mAllNodes, defaultExpandLevel);
        /**
         * 过滤出可见的Node
         */
        mNodes = TreeHelper.filterVisibleNode(mAllNodes);
        //刷新数据
        notifyDataSetChanged();
    }
 
    /**
     * 获取排序后所有节点
     *
     * @return
     */
    public List getAllNodes() {
        if (mAllNodes == null){
            mAllNodes = new ArrayList();
        }
        return mAllNodes;
    }
 
    /**
     * 相应ListView的点击事件 展开或关闭某节点
     *
     * @param position
     */
    public void expandOrCollapse(int position) {
        Node n = mNodes.get(position);
 
        if (n != null) {
            // 排除传入参数错误异常
            if (!n.isLeaf()) {
                n.setExpand(!n.isExpand());
                mNodes = TreeHelper.filterVisibleNode(mAllNodes);
                notifyDataSetChanged();// 刷新视图
            }
        }
    }
 
    /**
     * 设置多选
     *
     * @param node
     * @param checked
     */
    protected void setChecked(final Node node, boolean checked) {
        node.setChecked(checked);
        setChildChecked(node, checked);
        if (node.getParent() != null){
            setNodeParentChecked(node.getParent(), checked);
        }
        notifyDataSetChanged();
    }
 
    /**
     * 设置是否选中
     *
     * @param node
     * @param checked
     */
    public  void setChildChecked(Node node, boolean checked) {
        if (!node.isLeaf()) {
            node.setChecked(checked);
            for (Node childrenNode : node.getChildren()) {
                setChildChecked(childrenNode, checked);
            }
        } else {
            node.setChecked(checked);
        }
    }
 
    private void setNodeParentChecked(Node node, boolean checked) {
        if (checked) {
            node.setChecked(checked);
            if (node.getParent() != null){
                setNodeParentChecked(node.getParent(), checked);
            }
        } else {
            List childrens = node.getChildren();
            boolean isChecked = false;
            for (Node children : childrens) {
                if (children.isChecked()) {
                    isChecked = true;
                }
            }
            //如果所有自节点都没有被选中 父节点也不选中
            if (!isChecked) {
                node.setChecked(checked);
            }
            if (node.getParent() != null){
                setNodeParentChecked(node.getParent(), checked);
            }
        }
    }
 
    public abstract void onBindViewHolder(Node node, RecyclerView.ViewHolder holder, final int position);
 
    //===================在这里添加修改选中位置的方法=====================
    /**
     * 设置选中位置
     * @param selectedPosition
     */
    public void setSelectedPosition(int selectedPosition) {
        this.layoutPosition = selectedPosition;
    }
}

5. 自定义样式：

TypeTreeRecyclerAdapter.java

public class TypeTreeRecyclerAdapter extends TreeRecyclerAdapter {
    private static final String TAG = "TypeTreeRecyclerAdapter";
    private boolean isSingle;
 
    public TypeTreeRecyclerAdapter(RecyclerView mTree, Context context, List datas, int defaultExpandLevel, int iconExpand, int iconNoExpand,boolean isSingle) {
        super(mTree, context, datas, defaultExpandLevel, iconExpand, iconNoExpand);
        this.isSingle = isSingle;
    }
 
    public TypeTreeRecyclerAdapter(RecyclerView mTree, Context context, List datas, int defaultExpandLevel) {
        super(mTree, context, datas, defaultExpandLevel);
    }
 
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new MyHoder(View.inflate(mContext, R.layout.tree_list_item,null));
    }
 
    @Override
    public void onBindViewHolder(final Node node, RecyclerView.ViewHolder holder, int position) {
        final MyHoder viewHolder = (MyHoder) holder;
        //todo do something
        viewHolder.cb.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
//                setChecked(node,viewHolder.cb.isChecked());
                setChildChecked(node,viewHolder.cb.isChecked());
                listener.onItemClick(position);
            }
        });
        viewHolder.cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                if (isSingle) {
                    if (b) { //如果checkbox的状态是选中的，那么除了被选中的那条数据，其他Node节点的checkbox状态都为false
                        for (int i = 0; i < mAllNodes.size(); i++) {
                            if (((Node) mAllNodes.get(i)).getId().equals(node.getId())) {
 
                                Log.e(TAG,"note="+mAllNodes.get(i).getName());
                                ((Node) mAllNodes.get(i)).setChecked(b);
                            } else {
//                                Log.e(TAG,"1111 note="+mAllNodes.get(i).getName());
                                ((Node) mAllNodes.get(i)).setChecked(false);
                            }
                        }
                    } else {//如果checkbox的状态是选中的，所有Node节点checkbox状态都为false
                        for (int i = 0; i < mAllNodes.size(); i++) {
                            if (((Node) mAllNodes.get(i)).getId().equals(node.getId())) {
                                ((Node) mAllNodes.get(i)).setChecked(b);
                            }
                        }
                    }
                } else {   如果checkbox是多选的，对应node节点的checkbox状态视用户的操作而定
                    for (int i = 0; i < mAllNodes.size(); i++) {
                        if (((Node) mAllNodes.get(i)).getId().equals(node.getId()))
                            ((Node) mAllNodes.get(i)).setChecked(b);
 
                    }
                }
            }
        });
 
        if (node.isChecked()){
            viewHolder.cb.setChecked(true);
        }else {
            viewHolder.cb.setChecked(false);
        }
 
        if (node.getIcon() == -1) {
            viewHolder.icon.setVisibility(View.INVISIBLE);
        } else {
            viewHolder.icon.setVisibility(View.VISIBLE);
            viewHolder.icon.setImageResource(node.getIcon());
        }
 
        viewHolder.label.setText(node.getName());
 
 
    }
 
    public interface onAItemClickListener{
        void onItemClick(int position);
    }
    private onAItemClickListener listener;
    public void setOnItemClickListener (onAItemClickListener onItemClickListener) {
        listener = onItemClickListener;
    }
 
    class MyHoder extends RecyclerView.ViewHolder{
        public CheckBox cb;
        public TextView label;
        public ImageView icon;
        public MyHoder(View itemView) {
            super(itemView);
            cb = (CheckBox) itemView.findViewById(R.id.cb_select_tree);
            label = (TextView) itemView.findViewById(R.id.id_treenode_label);
            icon = (ImageView) itemView.findViewById(R.id.icon);
        }
    }
}

6. tree_list_item.xml

7. 页面：

public class OfficeTypeDialog extends Dialog implements View.OnClickListener {
    private static final String TAG = "OfficeTypeDialog";
    private Context mContext;
    private RecyclerView rv_typeTree;
    private TypeTreeRecyclerAdapter typeTreeRecyclerAdapter;
    private TypeTreeBean selectedBean;
    private Button btn_confirm,btn_cancel;
    private String source;
    private String orgId;
 
    public OfficeTypeDialog(@NonNull Context context) {
        super(context);
        mContext = context;
    }
 
    public OfficeTypeDialog(@NonNull Context context, int themeResId) {
        super(context, themeResId);
        mContext = context;
    }
 
    public OfficeTypeDialog(@NonNull Context context, int themeResId,String source) {
        super(context, themeResId);
        mContext = context;
        this.source = source;
    }
 
    public OfficeTypeDialog(@NonNull Context context, int themeResId,String source,String orgId) {
        super(context, themeResId);
        mContext = context;
        this.source = source;
        this.orgId = orgId;
    }
 
    protected OfficeTypeDialog(@NonNull Context context, boolean cancelable, @Nullable OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
        mContext = context;
    }
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_office_type);
 
        getWindow().setGravity(Gravity.CENTER); //显示在
        WindowManager m = getWindow().getWindowManager();
        Display d = m.getDefaultDisplay();
        WindowManager.LayoutParams p = getWindow().getAttributes();
        p.width = d.getWidth()/5*4; //设置dialog的宽度为当前手机屏幕的宽度
 
        p.height = d.getHeight()/5*4;
        getWindow().setAttributes(p);
 
        rv_typeTree = findViewById(R.id.rv_typeTree);
        btn_confirm = findViewById(R.id.btn_confirm);
        btn_cancel = findViewById(R.id.btn_cancel);
        btn_confirm.setOnClickListener(this);
        btn_cancel.setOnClickListener(this);
 
        getOfficeType();
    }
 
    List mDatas = new ArrayList<>();
    private List typeTreeBeans = new ArrayList<>();
    private void getOfficeType() {
        String url = "";
        if (source.equals("officeType")) {
            url = WebApi.OFFICE_TYPE;
        } else if(source.equals("area")) {
            url = WebApi.OFFICE_AREA;
        } else if(source.equals("nmpa")) {
 
            url = WebApi.OFFICE_NMPA;
        } else if(source.equals("nmpaUser")) {
            if (orgId != null) {
                url = WebApi.OFFICE_NMPA_USER+"?orgId="+orgId;
            }
        }
        OkHttpUtil.get(TAG, url, new StringCallback() {
            @Override
            public void onError(Call call, Exception e, int id) {
                Log.e(TAG,"getOfficeType e="+e);
            }
 
            @Override
            public void onResponse(String response, int id) {
                Log.e(TAG,"getOfficeType response="+response);
                try {
                    JSONObject object = new JSONObject(response);
                    if (object.getInt("code") == 200) {
                        JSONArray array = object.getJSONArray("data");
                        Gson gson = new Gson();
                        for (int i = 0;i typeTreeBeans1 = typeTreeBean.getChildren();
                                for (int j1 = 0;j1 typeTreeBeans2 = typeTreeBean1.getChildren();
                                        for (int j2 = 0;j2 typeTreeBeans3 = typeTreeBean2.getChildren();
                                                for (int j3 = 0;j3 typeTreeBeans4 = typeTreeBean3.getChildren();
                                                        for (int j4 = 0;j4 
  
OfficeTypeDialog typeDialog = new OfficeTypeDialog(mContext,R.style.Dialog,"officeType");
   typeDialog.setOnClickBottomListener(new OfficeTypeDialog.OnClickBottomListener() {
                    @Override
                    public void onPositiveClick(TypeTreeBean typeBean) {
                        tv_officeType.setText(typeBean.getName());
                        officeType = typeBean;
                        typeDialog.dismiss();
                    }
 
                    @Override
                    public void onNegtiveClick() {
                        typeDialog.dismiss();
                    }
                });
                typeDialog.show();
 
 

9. 效果图

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。