Contains methods to standard constants used in the UI for timeouts, sizes, and distances.
一。几个常用的方法
返回初始化滑动的最大速度值和最小速度值，以像素/秒为单位
getScaledMinimumFlingVelocity()
-
Minimum velocity to initiate a fling, as measured in pixels per second.
-
mMinimumFlingVelocity = (int) (density * 50 +0.5f);
getScaledMaximumFlingVelocity()
-
Maximum velocity to initiate a fling, as measured in pixels per second.
-
mMaximumFlingVelocity = (int) (density * 4000 +0.5f);
getScaledTouchSlop ()
-
Distance in pixels a touch can wander before we think the user is scrolling 。
-
mTouchSlop = (int) (density * 16 +0.5f);
getScaledPagingTouchSlop ()
-
Distance in pixels a touch can wander before we think the user is scrolling a full page
-
mPagingTouchSlop = (int) (density * 32 +0.5f);
在ViewConfigurationCompat 也有 getScaledPagingTouchSlop () 。所以要调用ViewConfigurationCompat的这个方法。