FocusFinder
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! |
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(: View, : View?, : Int)Find the root of the next keyboard navigation cluster after the current one. |
| open static FocusFinder! |
Get the focus finder for this thread. |
Public methods
findNearestTouchable
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. |
findNextFocus
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. |
findNextFocusFromRect
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. |
findNextKeyboardNavigationCluster
open fun findNextKeyboardNavigationCluster(
: View,
: View?,
: 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 |
getInstance
open static fun getInstance(): FocusFinder!
Get the focus finder for this thread.