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Summary: Methods | Inherited Methods | [Expand All]

public final class VelocityTrackerCompat
extends Object

java.lang.Object
↳	android.support.v4.view.VelocityTrackerCompat

Helper用于访问以向后兼容的方式在API级别4之后引入的 VelocityTracker功能。

Public methods
`static float`	`getXVelocity(VelocityTracker tracker, int pointerId)` 致电 `getXVelocity(int)` 。
`static float`	`getYVelocity(VelocityTracker tracker, int pointerId)` 致电 `getYVelocity(int)` 。

From class java.lang.Object

float getXVelocity (VelocityTracker tracker, 
                int pointerId)

致电getXVelocity(int) 。如果在预装HONEYCOMB设备上运行，则返回getXVelocity() 。

Parameters
`tracker`	`VelocityTracker`
`pointerId`	`int`

Returns
`float`

float getYVelocity (VelocityTracker tracker, 
                int pointerId)

致电getYVelocity(int) 。如果在预装HONEYCOMB设备上运行，则返回getYVelocity() 。

Parameters
`tracker`	`VelocityTracker`
`pointerId`	`int`

Returns
`float`