ViewDragHelper: how to use it?
android, drag, slide
Solution
Here is a good example shows how ViewDragHelper is used. https://github.com/umano/AndroidSlidingUpPanel
Use `ViewDragHelper.create()` method to create it. Use the `shouldInterceptTouchEvent()` to determine if you should intercept the touch event from child views.
Use `smootSlideViewTo()` method to move the child view within your customized view.
Problem
In the Google IO 2013, Google has announced a new version of the Support Library, which includes `ViewDragHelper` class. I saw the docs, but I couldn't find any sample of usage for this class. For example, a very typical situation: I have a custom view, which extends from `FrameLayout` and allows to drag some of the `View`s inside. For example, let it be a `Button`. I override `onTouchEvent()` and `onInterceptTouchEvent()` within my custom view, and if the button of the rect contains the touch coordinates and this is not a simple click, then I start to drag. So, what I must do with `ViewDragHelper` to get that? The clicks to the `Button` should process correctly.