DrawerItemViewHolder

Kotlin |Java

open class DrawerItemViewHolder : RecyclerView.ViewHolder, OnUxRestrictionsChangedListener

kotlin.Any
↳	androidx.recyclerview.widget.RecyclerView.ViewHolder
	↳	androidx.car.drawer.DrawerItemViewHolder

Re-usable RecyclerView.ViewHolder for displaying items in the androidx.car.drawer.CarDrawerAdapter.

Summary

Public constructors
`<init>(@NonNull view: View)` Create a new `ViewHolder` that will parse the given view that is meant to displaying items in a drawer.

Public methods
open TextView?	`getBodyView()` Returns the view that is used for the body text that is smaller than the title text and appears beneath the title.
open ImageView?	`getEndIconView()` Returns the icon that is displayed at the end of the view.
open ImageView	`getIconView()` Returns the view that should be used to display the main icon.
open TextView	`getTitleView()` Returns the view that will display the main title.
open Unit	`onUxRestrictionsChanged(restrictionsInfo: CarUxRestrictions!)` Updates child views with current car UX restrictions.

Inherited functions

From class ViewHolder

`Int`	`getAdapterPosition()` Returns the Adapter position of the item represented by this ViewHolder. Note that this might be different than the `getLayoutPosition()` if there are pending adapter updates but a new layout pass has not happened yet. RecyclerView does not handle any adapter updates until the next layout traversal. This may create temporary inconsistencies between what user sees on the screen and what adapter contents have. This inconsistency is not important since it will be less than 16ms but it might be a problem if you want to use ViewHolder position to access the adapter. Sometimes, you may need to get the exact adapter position to do some actions in response to user events. In that case, you should use this method which will calculate the Adapter position of the ViewHolder. Note that if you've called `RecyclerView.Adapter#notifyDataSetChanged()`, until the next layout pass, the return value of this method will be `NO_POSITION`.
`Long`	`getItemId()` Returns The itemId represented by this ViewHolder.
`Int`	`getItemViewType()`
`Int`	`getLayoutPosition()` Returns the position of the ViewHolder in terms of the latest layout pass. This position is mostly used by RecyclerView components to be consistent while RecyclerView lazily processes adapter updates. For performance and animation reasons, RecyclerView batches all adapter updates until the next layout pass. This may cause mismatches between the Adapter position of the item and the position it had in the latest layout calculations. LayoutManagers should always call this method while doing calculations based on item positions. All methods in `RecyclerView.LayoutManager`, `RecyclerView.State`, `RecyclerView.Recycler` that receive a position expect it to be the layout position of the item. If LayoutManager needs to call an external method that requires the adapter position of the item, it can use `getAdapterPosition()` or `RecyclerView.Recycler#convertPreLayoutPositionToPostLayout(int)`.
`Int`	`getOldPosition()` When LayoutManager supports animations, RecyclerView tracks 3 positions for ViewHolders to perform animations. If a ViewHolder was laid out in the previous onLayout call, old position will keep its adapter index in the previous layout.
`Int`	`getPosition()`
`Boolean`	`isRecyclable()`
`Unit`	`setIsRecyclable(recyclable: Boolean)` Informs the recycler whether this item can be recycled. Views which are not recyclable will not be reused for other items until setIsRecyclable() is later set to true. Calls to setIsRecyclable() should always be paired (one call to setIsRecyclabe(false) should always be matched with a later call to setIsRecyclable(true)). Pairs of calls may be nested, as the state is internally reference-counted.
`String`	`toString()`

Inherited properties

From class ViewHolder

View

itemView

Public constructors

<init>

DrawerItemViewHolder(@NonNull view: View)

Create a new ViewHolder that will parse the given view that is meant to displaying items in a drawer.

The given view is required to have a title and icon view with an optional body and end icon view. These views are looked up via ids, specifically:

Icon - R.id.icon
Title - R.id.title
Body - R.id.body
End Icon - R.id.end_icon

This method is exposed for testing purposes. The DrawerItemViewHolder is automatically created by the CarDrawerAdapter.

Parameters
`view`	View: The view that will represent an item in a drawer.

Public methods

getBodyView

@Nullable open fun getBodyView(): TextView?

Returns the view that is used for the body text that is smaller than the title text and appears beneath the title.

getEndIconView

@Nullable open fun getEndIconView(): ImageView?

Returns the icon that is displayed at the end of the view.

getIconView

@NonNull open fun getIconView(): ImageView

Returns the view that should be used to display the main icon.

getTitleView

@NonNull open fun getTitleView(): TextView

Returns the view that will display the main title.

onUxRestrictionsChanged

open fun onUxRestrictionsChanged(restrictionsInfo: CarUxRestrictions!): Unit

Updates child views with current car UX restrictions.

Text might be truncated to meet length limit required by regulation.

Parameters
`restrictionInfo`	CarUxRestrictions!: The new UX restriction information
`restrictionsInfo`	CarUxRestrictions!: current car UX restrictions.