RippleAlpha
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Cmn
class RippleAlpha
RippleAlpha defines the alpha of the ripple / state layer for different Interactions.
On Android, because the press ripple is drawn using the framework's RippleDrawable, there are constraints / different behaviours for the actual press alpha used on different API versions. Note that this only affects pressedAlpha - the other values are guaranteed to be consistent, as they do not rely on framework code. Specifically:
API 21-27: The actual ripple is split into two 'layers', with the alpha applied to both layers, so there is no uniform 'alpha'. API 28-32: The ripple is just one layer, but the alpha is clamped to a maximum of 0.5f - it is not possible to have a fully opaque ripple. API 33: There is a bug where the ripple is clamped to a minimum of 0.5, instead of a maximum like before - this should be resolved in future versions.
Summary
Public constructors |
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RippleAlpha( |
Cmn
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Public properties |
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Float |
the alpha used when the ripple is dragged |
Cmn
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Float |
the alpha used when the ripple is focused |
Cmn
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Float |
the alpha used when the ripple is hovered |
Cmn
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Float |
the alpha used when the ripple is pressed |
Cmn
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Public constructors
RippleAlpha
RippleAlpha(
draggedAlpha: Float,
focusedAlpha: Float,
hoveredAlpha: Float,
pressedAlpha: Float
)