TreeRv

MainActivity.java

 private int sum;

    private void findViewPositionForNode(List<TreeNode> nodes, TreeNode targetNode, IResult r) {
        for (int i = 0; i < nodes.size(); i++) {

            TreeNode node = nodes.get(i);
            sum++;

            if (node == targetNode) {
                int result = sum - 1;
                System.out.println("find target node:" + result);
                sum = 0;
                r.onResult(result);
                break;
            }
            if (!node.isLeaf()) {
                findViewPositionForNode(node.getChildList(), targetNode, r);
            }
        }
    }


    private void expandAll(List<TreeNode> treeNode) {
        for (int i = 0; i < treeNode.size(); i++) {
            TreeNode item = treeNode.get(i);
            if (!item.isLeaf()) {
                item.toggle();
                expandAll(item.getChildList());
            }
        }
    }

    interface IResult {
        void onResult(int targetPosition);
    }