与android treeview相关的问题

时间:2019-02-15 05:05:28

标签: java android

尝试将android treeview实现为项目。但它显示

  

java.lang.ClassCastException:无法将java.lang.String强制转换为   com.example.ekatechhp.pkmapplication.holder.IconTreeItemHolder $ IconTreeItem           在com.example.ekatechhp.pkmapplication.holder.IconTreeItemHolder.createNodeView(IconTreeItemHolder.java:12)

从片段中调用IconTreeItemHolder.java。

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_default, container, false);
        ViewGroup containerView = (ViewGroup) rootView.findViewById(R.id.container);
        TreeNode root = TreeNode.root();
        TreeNode pkm = new TreeNode("Personal Knowledge Management");
        TreeNode personal = new TreeNode("Personal");
        TreeNode knowledge = new TreeNode("Knowledge");
        TreeNode management = new TreeNode("Management");
        pkm.addChildren(personal, knowledge, management);
        root.addChild(pkm);
        tView = new AndroidTreeView(getActivity(), root);
        tView.setDefaultAnimation(true);
        tView.setDefaultContainerStyle(R.style.TreeNodeStyleCustom);
        tView.setDefaultViewHolder(IconTreeItemHolder.class);
        tView.setDefaultNodeClickListener(nodeClickListener);
        tView.setDefaultNodeLongClickListener(nodeLongClickListener);
        containerView.addView(tView.getView());
        if (savedInstanceState != null) {
            String state = savedInstanceState.getString("tState");
            if (!TextUtils.isEmpty(state)) {
                tView.restoreState(state);
            }
        }
        return rootView;
    }

0 个答案:

没有答案