The values of some Android methods do not have vibration effects

[Pahkoo]

There are some methods that cannot achieve vibration in an Android environment.Such as 'impactLight','soft'and new VibrateWithHapticConstant Defined vibration methods

,Is the vibration time too short, and is it dependent on the hardware and driver programs of the device, which makes these methods unable to achieve device vibration

[mkuczera]

While developing the initial library there were only patterns to mimic the haptic most of the time. But most of the methods should actually be available on Android, or am i missing something? Glad for help :)