LayoutParams
open class LayoutParams : MarginLayoutParams
| kotlin.Any | |||
| ↳ | android.view.ViewGroup.LayoutParams | ||
| ↳ | android.view.ViewGroup.MarginLayoutParams | ||
| ↳ | androidx.recyclerview.widget.RecyclerView.LayoutParams | ||
LayoutParams subclass for children of RecyclerView. Custom layout managers are encouraged to create their own subclass of this LayoutParams class to store any additional required per-child view metadata about the layout.
Summary
Public constructors |
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|---|---|
<init>(c: Context!, attrs: AttributeSet!) |
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<init>(source: MarginLayoutParams!) |
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<init>(source: LayoutParams!) |
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<init>(source: RecyclerView.LayoutParams!) |
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Public methods |
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|---|---|
| open Int |
Returns the up-to-date adapter position that the view this LayoutParams is attached to corresponds to. |
| open Int |
Returns the adapter position that the view this LayoutParams is attached to corresponds to as of latest layout calculation. |
| open Int | |
| open Boolean |
Returns true if the adapter data item corresponding to the view this LayoutParams is attached to has been changed in the data set. |
| open Boolean |
Returns true if the adapter data item corresponding to the view this LayoutParams is attached to has been removed from the data set. |
| open Boolean |
Returns true if the view this LayoutParams is attached to is now representing potentially invalid data. |
| open Boolean |
Returns true if the view this LayoutParams is attached to needs to have its content updated from the corresponding adapter. |
Public constructors
<init>
LayoutParams(c: Context!, attrs: AttributeSet!)
<init>
LayoutParams(source: MarginLayoutParams!)
<init>
LayoutParams(source: LayoutParams!)
<init>
LayoutParams(source: RecyclerView.LayoutParams!)
Public methods
getViewAdapterPosition
open fun getViewAdapterPosition(): Int
Returns the up-to-date adapter position that the view this LayoutParams is attached to corresponds to.
| Return | |
|---|---|
Int: the up-to-date adapter position this view. It may return RecyclerView#NO_POSITION if item represented by this View has been removed or its up-to-date position cannot be calculated. |
getViewLayoutPosition
open fun getViewLayoutPosition(): Int
Returns the adapter position that the view this LayoutParams is attached to corresponds to as of latest layout calculation.
| Return | |
|---|---|
| Int: the adapter position this view as of latest layout pass |
getViewPosition
open fungetViewPosition(): Int
Deprecated: use getViewLayoutPosition() or getViewAdapterPosition()
isItemChanged
open fun isItemChanged(): Boolean
Returns true if the adapter data item corresponding to the view this LayoutParams is attached to has been changed in the data set. A LayoutManager may choose to treat it differently in order to animate its changing state.
| Return | |
|---|---|
| Boolean: true if the item the view corresponds to was changed in the data set |
isItemRemoved
open fun isItemRemoved(): Boolean
Returns true if the adapter data item corresponding to the view this LayoutParams is attached to has been removed from the data set. A LayoutManager may choose to treat it differently in order to animate its outgoing or disappearing state.
| Return | |
|---|---|
| Boolean: true if the item the view corresponds to was removed from the data set |
isViewInvalid
open fun isViewInvalid(): Boolean
Returns true if the view this LayoutParams is attached to is now representing potentially invalid data. A LayoutManager should scrap/recycle it.
| Return | |
|---|---|
| Boolean: true if the view is invalid |