Smooth scrolling in Android applications

Question

I would like to add the smooth scrolling functionality into my application. ie I have a huge text and I want to scroll it automatically (like in book readers).

Could anyone offer any examples of smooth scrolling?

Answer 1

Just put the view(s) you want to scroll inside a ScrollView. So to put some text in a scrolling area, put the text in a TextView, and then the TextView inside a ScrollView, like this:

<ScrollView
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
        <TextView
            android:id="@+id/my_view_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
        />
</ScrollView>

Answer 2

Use reflection to update the ScrollView's Scroller:

Field mScroller;
mScroller = ScrollView.class.getDeclaredField("mScroller");
mScroller.setAccessible(true);

CustomScroller scroller = new CustomScroller(getContext(), new AccelerateInterpolator());
mScroller.set(this, scroller);

Use smoothScrollTo method (may have to setSmoothScrolligEnabled(true))