![]() A keyword here is considered to be highly rated if it better represented the unique information of the certain section of the transcript. IT is even challenging to identify whether a section or keyword is important - what is of great importance to one person can be of less importance to another.Īs illustrated above in the Smart Scrolling architecture, Google AI team designed their solution in such a way so that the model selects the top scored sections with highly rated keywords. To make the phone understand when to scroll and when to stop is a huge challenge. ML Behind Smart Scrolling Source: Google AI Let's just take a look at the code of the Behavior: public class OverScrollBounceBehavior extends CoordinatorLayout.Read more about the Recorder app here. In this case we are going to assign a Behavior to the NestedScrollView which is going implement the overscroll bounce effect. The CoordinatorLayout allows you to assign a Behavior to its direct child views. In my example I am using a NestedScrollView: Whatever scrollable container you are using needs to wrapped in a CoordinatorLayout in your layout. Remember that if you aren't targeting API level 25 (which you should by the way) then you need to include the newest version for your API level (eg. They are identical in any way, but the NestedScrollView implements correct nested scrolling behaviour on lower API levels.Īnyway let's start with my answer: The solution I came up with would work with any scrollable container, be it a ScrollView, ListView or RecyclerView and you don't need to subclass any Views to implement it.įirst you need to add Google's Design Support Library to your project if you aren't already using it: compile ':design:25.0.1' ![]() Anyway the result should look something like this:Īs a small side note before I start with the answer: I strongly recommend that you use the NestedScrollView from the support library instead of a normal ScrollView. It's not perfect, you can maybe spend some time fine tuning it a bit, but it's not bad. I have quickly put together a simple solution based on a CoordinatorLayout.Behavior. Return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, mMaxYOverscrollDistance, isTouchEvent) This is where the magic happens, we have replaced the incoming maxOverScrollY with our own custom variable mMaxYOverscrollDistance MMaxYOverscrollDistance = (int) (density * boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) variable so that you get similar behaviors no matter what the screen sizeįinal DisplayMetrics metrics = mContext.getResources().getDisplayMetrics() get the density of the screen and do some maths with it on the max overscroll distance Public ObservableScrollView(Context context, AttributeSet attrs, int defStyle) Public ObservableScrollView(Context context, AttributeSet attrs) Public ObservableScrollView(Context context) Private static final int MAX_Y_OVERSCROLL_DISTANCE = 150 This is the code I currently have: public class ObservableScrollView extends ScrollView But the problem is that when I am scrolling up and down fast it's working fine but as soon as I pull the bottom or top of the screen it's just stuck and the effect is not working anymore.Īs an example of the kind of animation I want to achieve you can look at this: I came across this link which suggests creating a custom ScrollView. I want to implement the iOS-like bounce overscroll effect in my app.
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