[android-developers] Represent Graphically a Tree

What would be the best way to represent a data tree graphically?

I've thinked to use a multi level TextView, but these levels are
implemented into ListView or I must implement them into my code?

Like a File Manager, wich the filesystem is the tree structure and the
directory and files are the items. I want to navigate inside my tree
pressing the items to go to the next level and back button to go back
to the previous tree level.

Is there something to use out of the box for doing this?

Thanks

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