这几项都是啥意思

[liu-xinhui]

    <attr name="rvp_triggerOffset" format="float" />
    <attr name="rvp_flingFactor" format="float" />
    <attr name="rvp_singlePageFling" format="boolean" />
    <attr name="rvp_inertia" format="boolean"/>
    <attr name="rvp_millisecondsPerInch" format="float" />