FocusFinder

Kotlin |Java

open class FocusFinder

kotlin.Any
↳	android.view.FocusFinder

The algorithm used for finding the next focusable view in a given direction from a view that currently has focus.

Summary

Public methods
open View!	`findNearestTouchable(root: ViewGroup!, x: Int, y: Int, direction: Int, deltas: IntArray!)` Find the nearest touchable view to the specified view.
View!	`findNextFocus(root: ViewGroup!, focused: View!, direction: Int)` Find the next view to take focus in root's descendants, starting from the view that currently is focused.
open View!	`findNextFocusFromRect(root: ViewGroup!, focusedRect: Rect!, direction: Int)` Find the next view to take focus in root's descendants, searching from a particular rectangle in root's coordinates.
open View!	`findNextKeyboardNavigationCluster(root: View, currentCluster: View?, direction: Int)` Find the root of the next keyboard navigation cluster after the current one.
open static FocusFinder!	`getInstance()` Get the focus finder for this thread.

open fun findNearestTouchable(
    root: ViewGroup!, 
    x: Int, 
    y: Int, 
    direction: Int, 
    deltas: IntArray!
): View!

Find the nearest touchable view to the specified view.

Parameters
`root`	ViewGroup!: The root of the tree in which to search
`x`	Int: X coordinate from which to start the search
`y`	Int: Y coordinate from which to start the search
`direction`	Int: Direction to look
`deltas`	IntArray!: Offset from the to the edge of the nearest view. Note that this array may already be populated with values.

Return
`View!`	The nearest touchable view, or null if none exists.

fun findNextFocus(
    root: ViewGroup!, 
    focused: View!, 
    direction: Int
): View!

Find the next view to take focus in root's descendants, starting from the view that currently is focused.

Parameters
`root`	ViewGroup!: Contains focused. Cannot be null.
`focused`	View!: Has focus now.
`direction`	Int: Direction to look.

Return
`View!`	The next focusable view, or null if none exists.

open fun findNextFocusFromRect(
    root: ViewGroup!, 
    focusedRect: Rect!, 
    direction: Int
): View!

Find the next view to take focus in root's descendants, searching from a particular rectangle in root's coordinates.

Parameters
`root`	ViewGroup!: Contains focusedRect. Cannot be null.
`focusedRect`	Rect!: The starting point of the search.
`direction`	Int: Direction to look.

Return
`View!`	The next focusable view, or null if none exists.

open fun findNextKeyboardNavigationCluster(
    root: View, 
    currentCluster: View?, 
    direction: Int
): View!

Find the root of the next keyboard navigation cluster after the current one.

Parameters
`root`	View: The view tree to look inside. Cannot be null
`currentCluster`	View?: The starting point of the search. Null means the default cluster This value may be `null`.
`direction`	Int: Direction to look Value is `android.view.View#FOCUS_BACKWARD`, `android.view.View#FOCUS_FORWARD`, `android.view.View#FOCUS_LEFT`, `android.view.View#FOCUS_UP`, `android.view.View#FOCUS_RIGHT`, or `android.view.View#FOCUS_DOWN`

Return
`View!`	The next cluster, or null if none exists

open static fun getInstance(): FocusFinder!

Get the focus finder for this thread.