Make ViewPager snap with shorter drag

Question

Is there any way to make the support package ViewPager snap to the next page with a shorter drag? The default behaviour seems to be that even if I drag almost 75% the page still

Answer 1

I did this using reflection. By setting a private field mMinimumVelocity to -1, you make the ViewPager take all your scrolls as a fling scroll - which needs much shorter drag to switch to the next page. Works like a charm!

Field mMinimumVelocity;
mMinimumVelocity = ViewPager.class.getDeclaredField("mMinimumVelocity");
mMinimumVelocity.setAccessible(true);
mMinimumVelocity.set(mPager, -1);

The source code from which I know the private fields is here.

Also if you want to make the threshold a little bigger than the default 25dp of the fling scroll, you can set the mFlingDistance field to some higher value, e.g. 45dp. But remember it also affects the required drag distance of the actual fling scroll.

Field mFlingDistance;
mFlingDistance= ViewPager.class.getDeclaredField("mFlingDistance");
mFlingDistance.setAccessible(true);
mFlingDistance.set(mPager, (int) (45 * context.getResources().getDisplayMetrics().density));