public override bool OnTouchEvent(MotionEvent e)
{
var index = e.ActionIndex;
var action = (MotionEventActions)e.ActionMasked;
var pointerId = e.GetPointerId(index);
switch (action)
{
case MotionEventActions.Down:
if (this._velocityTracket == null)
{
this._velocityTracket = VelocityTracker.Obtain();
}
else
{
this._velocityTracket.Clear();
}
this._velocityTracket.AddMovement(e);
break;
case MotionEventActions.Move:
this._velocityTracket.AddMovement(e);
this._velocityTracket.ComputeCurrentVelocity(1000);
Log.Debug(DebugTag, "X velocity: " + VelocityTrackerCompat.GetXVelocity(this._velocityTracket, pointerId));
Log.Debug(DebugTag, "Y velocity: " + VelocityTrackerCompat.GetYVelocity(this._velocityTracket, pointerId));
break;
case MotionEventActions.Cancel:
case MotionEventActions.Up:
this._velocityTracket.Recycle();
break;
default:
break;
}
return(true);
}
private float getYVelocity()
{
mVelocityTracker.ComputeCurrentVelocity(1000, mMaximumVelocity);
return(VelocityTrackerCompat.GetYVelocity(mVelocityTracker, mActivePointerId));
}
