RowHeaderPresenter
open class RowHeaderPresenter : Presenter
| kotlin.Any | ||
| ↳ | androidx.leanback.widget.Presenter | |
| ↳ | androidx.leanback.widget.RowHeaderPresenter | |
RowHeaderPresenter provides a default presentation for HeaderItem using a RowHeaderView and optionally a TextView for description. If a subclass creates its own view, the subclass must also override onCreateViewHolder(ViewGroup), onSelectLevelChanged(ViewHolder).
Summary
Nested classes |
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| open |
A ViewHolder for the RowHeaderPresenter. |
Public constructors |
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<init>()Creates default RowHeaderPresenter using a title view and a description view. |
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Public methods |
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| open Int |
Returns the space (distance in pixels) below the baseline of the text view, if one exists; otherwise, returns 0. |
| open Boolean |
Returns true if the view visibility is set to |
| open Unit |
onBindViewHolder(viewHolder: Presenter.ViewHolder!, item: Any!) |
| open Presenter.ViewHolder! |
onCreateViewHolder(parent: ViewGroup!) |
| open Unit |
onUnbindViewHolder(viewHolder: Presenter.ViewHolder!) |
| open Unit |
setNullItemVisibilityGone(nullItemVisibilityGone: Boolean)Optionally sets the view visibility to |
| Unit |
setSelectLevel(holder: RowHeaderPresenter.ViewHolder!, selectLevel: Float)Sets the select level. |
Protected methods |
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| open static Float |
getFontDescent(textView: TextView!, fontMeasurePaint: Paint!) |
| open Unit |
Called when the select level changes. |
Inherited functions |
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Public constructors
<init>
RowHeaderPresenter()
Creates default RowHeaderPresenter using a title view and a description view.
See Also
ViewHolder#RowHeaderPresenter.ViewHolder(View)
Public methods
getSpaceUnderBaseline
open fun getSpaceUnderBaseline(holder: RowHeaderPresenter.ViewHolder!): Int
Returns the space (distance in pixels) below the baseline of the text view, if one exists; otherwise, returns 0.
isNullItemVisibilityGone
open fun isNullItemVisibilityGone(): Boolean
Returns true if the view visibility is set to View#GONE when bound to null.
onBindViewHolder
open fun onBindViewHolder(
viewHolder: Presenter.ViewHolder!,
item: Any!
): Unit
onCreateViewHolder
open fun onCreateViewHolder(parent: ViewGroup!): Presenter.ViewHolder!
onUnbindViewHolder
open fun onUnbindViewHolder(viewHolder: Presenter.ViewHolder!): Unit
setNullItemVisibilityGone
open fun setNullItemVisibilityGone(nullItemVisibilityGone: Boolean): Unit
Optionally sets the view visibility to View#GONE when bound to null.
setSelectLevel
fun setSelectLevel(
holder: RowHeaderPresenter.ViewHolder!,
selectLevel: Float
): Unit
Sets the select level.
Protected methods
getFontDescent
protected open static fun getFontDescent(
textView: TextView!,
fontMeasurePaint: Paint!
): Float
onSelectLevelChanged
protected open fun onSelectLevelChanged(holder: RowHeaderPresenter.ViewHolder!): Unit
Called when the select level changes. The default implementation sets the alpha on the view.