You don't always get what you expect when you push a button on your Android smartphone. In fact, if you know all the right moves, you can get a lot more. Android uses a combination of touches, drags, double-touches, stabs, flicks and pinches to control what you see on your display. For example, a button can be briefly touched to initiate one response, but it can also be touched and held to initiate a different response.
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