A LayoutManager that must be used with RecyclerView. When list is scrolled views are moved by circular trajectory
android:minSdkVersion = 15
List<String> mList = new ArrayList<>(Arrays.asList( "Passenger Cabin 1", "Passenger Cabin 2", "Passenger Cabin 3", "Passenger Cabin 4", "Passenger Cabin 5")); int screenWidth = getActivity().getResources().getDisplayMetrics().widthPixels; // define circle radius int circleRadius = screenWidth; // define center of the circle int xOrigin = -200; int yOrigin = 0; mRecyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view); // set radius and center mRecyclerView.setParameters(circleRadius, xOrigin, yOrigin); mLondonEyeLayoutManager = new LondonEyeLayoutManager( circleRadius, xOrigin, yOrigin, mRecyclerView, // define scroll strategy NATURAL / PIXEL_PERFECT IScrollHandler.Strategy.NATURAL); mRecyclerView.setLayoutManager(mLondonEyeLayoutManager); mVideoRecyclerViewAdapter = new YourCustomAdapter(getActivity(), mList); mRecyclerView.setAdapter(mVideoRecyclerViewAdapter);
#Details of implementation
Demo of Natural Scroll handler.
This scroll handler keeps the distance between cabins as a constant. This means that if your views are next to each other they will overlap each other when you scroll.
Demo of PixelPerfect Scroll handler.
This scroll handler keeps views in touch. There is 2 rules:
- View center is always on the circle
- Views should touch each other either by top/bottom or by left/right sides.
Because we follow these rules we might see some unexpected behaviour: If "view B" is below "view A" and views are scrolled down we can reach a point in which "view B" cannot longer stay below "view A" and keep it's center on the circle so, in this case "view B" jumps to the side in order to stay in touch with "view A" side by side and keep it's center on the circle.
- Animations support.
- Handle inPrelayout
- Save/Restore instance state
- Handle data set changes
- Fix a crash when scrolling fast with Natural Scroll Handler
Any contributions are welcome :)
Copyright 2015 Danylo Volokh
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