If you want to have the panel height follow your finger, search the forum for "drag view," you will find many examples and methods. There may even be a draggable view custom control if I recall correctly.
Hello, With this class, you can put an hidden sidebar on one of the four sides of the screen and reveal it when needed. It can open with a button, like in the Facebook app, with a handle, as the standard Android slidingdrawer, or with a swipe gesture, like in Prixing. Many options are available...