RecyclerVIew auto scroll to display all the elements as in News Feed etc.,

Question

How to auto scroll RecyclerView smoothly so that user can see all the elements of the RecyclerView and scroll again from the start - as in News Feed etc.

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Answer 1

After Trial And Errors This Works Perfect For Me

    final RecyclerView mRecyclerViewr;
    final ArrayList stringArrayData = new ArrayList
    final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.HORIZONTAL, false);
    mRecyclerViewr.setLayoutManager(linearLayoutManager);
    CustomAdapter customAdapter = new CustomAdapter(getApplicationContext(), topPriceBarList);
    mRecyclerViewr.setAdapter(customAdapter);

        // Auto Scroll Left To Right
        final int scrollSpeed = 100;   // Scroll Speed in Milliseconds
        final Handler handler = new Handler();
        final Runnable runnable = new Runnable() {
            int x = 15;        // Pixels To Move/Scroll
            boolean flag = true;
            // Find Scroll Position By Accessing RecyclerView's LinearLayout's Visible Item Position
            int scrollPosition = linearLayoutManager.findLastCompletelyVisibleItemPosition();  
            int arraySize = stringArrayData.size();  // Gets RecyclerView's Adapter's Array Size

            @Override
            public void run() {
                if (scrollPosition < arraySize) {
                    if (scrollPosition == arraySize - 1) {
                        flag = false;
                    } else if (scrollPosition <= 1) {
                        flag = true;
                    }
                    if (!flag) {
                        try {
                            // Delay in Seconds So User Can Completely Read Till Last String
                            TimeUnit.SECONDS.sleep(1); 
                            mRecyclerViewr.scrollToPosition(0);  // Jumps Back Scroll To Start Point
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    // Know The Last Visible Item
                    scrollPosition = linearLayoutManager.findLastCompletelyVisibleItemPosition();

                    mRecyclerViewr.smoothScrollBy(x, 0);
                    handler.postDelayed(this, scrollSpeed);
                }
            }
        };
        handler.postDelayed(runnable, scrollSpeed);

This Will Auto Scroll Your RecyclerView To The End, Wait For a Second (So User Can Read Till End) And Jumps/Scroll Back To First String In RecyclerView's Array List. If You Want To Auto Scroll in Posetive And Negative direction You Just Need To Change The Condition Instead Of Using if(!flag) You Need To Set Value Of x in it

    if (flag) x = 15;
    else x= -15;  // For Auto Scroll To Negative i.e Left Direction