Reduce speed of smooth scroll in scroll view

Question

I have a scroll View. I performed smooth-scroll.using smoothScrollBy().It all works fine, but I want to change the duration of the smooth-scroll. Smooth-scroll happens very fast

Answer 1

This is how I achieved a smooth vertical scroll (like movie credits). This also allows the user to move the scroll up and down and allow it to continue scrolling when they let go. In my XML, I encapsulated my TextView inside of a ScrollView called "scrollView1". Enjoy!

    final TextView tv=(TextView)findViewById(R.id.lyrics);
    final ScrollView scrollView = (ScrollView) findViewById(R.id.scrollView1);
    Button start = (Button) findViewById(R.id.button_start);
    Button stop = (Button) findViewById(R.id.button_stop);
    final Handler timerHandler = new Handler();
    final Runnable timerRunnable = new Runnable() {
        @Override
        public void run() {
            scrollView.smoothScrollBy(0,5);         // 5 is how many pixels you want it to scroll vertically by
            timerHandler.postDelayed(this, 10);     // 10 is how many milliseconds you want this thread to run
        }
    };

    start.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           timerHandler.postDelayed(timerRunnable, 0);
        }
    });

    stop.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            timerHandler.removeCallbacks(timerRunnable);
        }
    });