Android: Create a swipe gesture event programmatically

问题

I've been trying to find an answer for this specific case on Google and amazingly couldn't find it anywhere (there's just answers about detecting, not creating, swipes). I want to actually 'run' a simulated swipe from right to left on the screen (doesn't matter where, but ideally from the right edge to the left). I tried something like this, but I get a NPE:

final float viewWidth = view.getWidth();
    TouchUtils.drag(null,viewWidth,1f,0f,0f,1);

The reason? I need to force a swipe to the next page in an infinite viewpager which has no real reference to the page position (so I can't just use setCurrentItem).

Any ideas?

来源：https://stackoverflow.com/questions/30563169/android-create-a-swipe-gesture-event-programmatically