I have tried to do treeView.setDefaultNodeClickListener(null); and then do this code whenever I'm creating a new node:

taskNode.setClickListener(new TreeNode.TreeNodeClickListener() {
            @Override
            public void onClick(TreeNode treeNode, Object o) {
                Intent openTaskDetails_Activity = new Intent(getActivity(), Task_ViewPager_Activity.class);
                openTaskDetails_Activity.putExtra(Constants.GOD_TASK_OBJECT, Parcels.wrap(parentTask));
                startActivity(openTaskDetails_Activity);
            }
        });

But when I do this, both actions happen; The node expands/collapses and the item opens in a new activity, how can I disable the default node listener so that I can let the arrow button on the far right of my layout be responsible for expanding and collapsing items?

Right now, my tree view looks like a normal list. The children don't move to the left. I had compared the project's sample but there isn't any different. What am I missing?

This code runs through my parent Task objects and for each one of its children, it gets the children and adds them to that parent, then to the root, then again for all the remaining parents. At the end, it makes a new AndroidTreeView and set its properties and then should add that TreeView to the containerView I have defined (RelativeLayout cast into ViewGroup), just as your code says. processTasks(allTasks) is called only once.

Seems strange that there would be an exception and I looked through all the issues, no one faced this..any help would be appreciated, thanks!

    public void processTasks(List<Task> allTasks) {
        final TreeNode root = TreeNode.root();

        for (Task task : allTasks) {
            TreeNode parentNode = new TreeNode(task).setViewHolder(new TaskTreeItemHolder(getActivity()));
            processTaskChildren(task, root, parentNode);
        }

        AndroidTreeView taskTreeView = new AndroidTreeView(getActivity(), root);
        taskTreeView.setDefaultAnimation(true);
        taskTreeView.setDefaultContainerStyle(R.style.TreeNodeStyleDivided, true);

        //Returns null here (Attempt to invoke virtual method 'android.content.Context android.view.View.getContext()' on a null object reference)
        // It's referring to the taskTreeView.getView() because naturally the exception would have mentioned the exception on addView instead
        taskListContainer.addView(taskTreeView.getView());
    }

    public void processTaskChildren(Task parentTask, TreeNode rootNode, TreeNode parentNode) {
        List<Task> childrenTasks = taskDAO.queryForEq("ParentTaskId", parentTask.getTask_id());

        for (Task child : childrenTasks) {
            TreeNode taskChildNode = new TreeNode(child).setViewHolder(new TaskTreeItemHolder(getActivity()));
            parentNode.addChild(taskChildNode);
            processTaskChildren(child, rootNode, parentNode);
        }

        rootNode.addChild(parentNode);
    }

I need to display a background when I select a node like select element of ListView, I'm trying to set a background in nodeClickListener but doesn't work, any way to solve this? Thanks.

I used to have my TreeView created in the main Activity. I move it to a Fragment but now nothing show up. I followed your samples but i can't find my mistake. I hope you can help me.

Here is my Fragment creation:

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.content_main, null, false);
        mViewRoot = (ViewGroup) view.findViewById(R.id.main_container);

        final TreeNode root = TreeNode.root();
        root.addChild(new TreeNode(new IconTreeItemHolder.IconTreeItem(R.string.ic_home, "Room")));
        atView = new AndroidTreeView(getActivity(), root);
        mViewRoot.addView(atView.getView());

        return view;
    }

And here is my fragment layout:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/main_container"></RelativeLayout>


</RelativeLayout>

The fragment is added in the actvity xml layout.

Thanks for help.

Hi. Your library is important to our ongoing work requiring a sales model treeview. Please help me out on this one. Once I open a deep nested child within a node and then I collapse the node itself and reopen it, the child nodes maintain their opened state which is not required in our implementation.

Hi,

The pull request changes are for the following reasons.

1. I am currently writing a FileTreeView which has the interface

   
   public FileTreeView(Context context, File file) {
       super(context);
       TreeNode root = TreeNode.root();
       setUpNode(root, file);
       setRoot(root);
   }
   

   This requires creating a root node before initialising the superclass AndroidTreeView.

2. mRoot usually needs to be visited in subclasses when writing a custom traverse method. I changed it to protected.

3. I have the need to access the nodeContainer from others classes. For example, I want to set the background of a single row to a certain colour.

this.highlightedNode.getViewHolder().getView().setBackgroundColor(color);;

This would colour all the children nodes.

Instead, I would like to do something like this:

view = (TreeNodeWrapperView) this.highlightedNode.getViewHolder().getView();
view.getNodeContainer().setBackgroundColor(color);

I implemented the library on my android app, but i have 2 problems:

• The child nodes doesn't have any left margin, so the tree looks like a simple list of itens.
• And setDisplayHomeAsUpEnabled isnt working in the TreeNode fragment.

This happened to someone ?

Hi,

I'm running into a problem where my app has

 <application android:allowBackup="false" tools:replace="allowBackup" />

There seems to be a Gradle/Android bug that causes that to fail because the AndroidTreeView Library has

 <application android:allowBackup="true" /> 

Is there a reason this is set in the library manifest file itself? I was thinking maybe it wasn't necessary?

Thanks for the great software!

Right now on restoring the code takes the selected nodes and puts them in a hashset

final Set<String> openNodes = new HashSet<>(Arrays.asList(openNodesArray));

So if you have 1;0:0;2;0:0 gives you HashSet {1, 0:0, 2} but if you have 1;0:0;2 that gives you the same HashSet {1, 0:0, 2}

There is data loss here because there is no indication which 0:0 is selected

To see this in practice go to "Custom Holder Example" open "My Profile" -> Social open "Bruce Wayne" -> Social open "Barry Allen" -> Social; open "Barry Allen" -> Places rotate the device All the places nodes are expanded.

I have a solution which looks like this and writes the tree with DFS as a string

    private void getSaveState(TreeNode root, StringBuilder sBuilder) {
        for (TreeNode node : root.getChildren()) {
            if (node.isExpanded()) {
                sBuilder.append(NODE_EXPANDED);
            }
            else {
                sBuilder.append(NODE_COLLAPSED);
            }
            getSaveState(node, sBuilder);
        }
    }

    public String getSaveState() {
        final StringBuilder builder = new StringBuilder();
        getSaveState(mRoot, builder);
        return builder.toString();
    }

Let me know what you think of this solution, and I'll make a pull request with the changes.

test code:

        root = TreeNode.root();
        TreeNode xd1 = new TreeNode("test1");
        TreeNode xd2 = new TreeNode("test2");
        TreeNode xd3 = new TreeNode("test3");
        TreeNode xd4 = new TreeNode("test4");
        TreeNode xd5 = new TreeNode("test5");
        xd4.addChildren(xd3, xd2);
        xd2.addChild(xd1);
        root.addChildren(xd4, xd5);
        tView = new AndroidTreeView(getActivity(), root);
        layout.addView(tView.getView());

effect: Am i doing something wrong?

I have run this project in my android studio. But it is not working properly due to build errors, can you please tell us how to compile with latest version or please give us an working sample in current android version.

Thank you.

I am using AndroidTreeView to show a hierarchy of items. First level of treeview is not being displayed with padding. the tree view like hierarchy is showing up from second level to all other levels. Bug explained in this video at https://www.youtube.com/watch?v=_9XjgVCqIOg&t=146

If I remove the arrow icon, it shows good as expected with the correct padding for all the levels. I need arrow icon to indicate that the user can expand & collapse. https://github.com/onedrupal/One-Drupal-Android/blob/master/app/src/main/res/layout/layout_node.xml

<com.github.johnkil.print.PrintView
        android:layout_alignParentLeft="true"
        android:id="@+id/arrow_icon"

https://github.com/onedrupal/One-Drupal-Android/blob/master/app/src/main/java/treeutil/ArrowExpandSelectableHeaderHolder.java#L55

arrowView = (PrintView) view.findViewById(R.id.arrow_icon);
        arrowView.setPadding(20,10,10,10);
        if (node.isLeaf()) {
            arrowView.setVisibility(View.INVISIBLE);
        }