What is view tree in Android?
A view tree observer is used to register listeners that can be notified of global changes in the view tree. Such global events include, but are not limited to, layout of the whole tree, beginning of the drawing pass, touch mode change….
What is TreeView app?
TreeView is a powerful family tree builder. Whether you're an experienced family historian or just starting out, you'll find TreeView easy to use and an essential tool in your research. Record your family's history and view details of your ancestors in a number of different and attractive ways.