FocusFinder

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

Summary

Public Methods
View	findNearestTouchable(ViewGroup root, int x, int y, int direction, int[] deltas) Find the nearest touchable view to the specified view.
final View	findNextFocus(ViewGroup root, View focused, int direction) Find the next view to take focus in root's descendants, starting from the view that currently is focused.
View	findNextFocusFromRect(ViewGroup root, Rect focusedRect, int direction) Find the next view to take focus in root's descendants, searching from a particular rectangle in root's coordinates.
static FocusFinder	getInstance() Get the focus finder for this thread.

Public Methods

View

findNearestTouchable(ViewGroup root, int x, int y, int direction, int[] deltas)

Find the nearest touchable view to the specified view.

final View

findNextFocus(ViewGroup root, View focused, int direction)

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

View

findNextFocusFromRect(ViewGroup root, Rect focusedRect, int direction)

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

static FocusFinder

getInstance()

Get the focus finder for this thread.

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Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Methods

public View findNearestTouchable (ViewGroup root, int x, int y, int direction, int[] deltas)

Added in API level 1

Find the nearest touchable view to the specified view.

Parameters

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

Returns

The nearest touchable view, or null if none exists.

public final View findNextFocus (ViewGroup root, View focused, int direction)

Added in API level 1

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

Parameters

root	Contains focused. Cannot be null.
focused	Has focus now.
direction	Direction to look.

Returns

The next focusable view, or null if none exists.

public View findNextFocusFromRect (ViewGroup root, Rect focusedRect, int direction)

Added in API level 1

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

Parameters

root	Contains focusedRect. Cannot be null.
focusedRect	The starting point of the search.
direction	Direction to look.

Returns

The next focusable view, or null if none exists.

public static FocusFinder getInstance ()

Added in API level 1

Get the focus finder for this thread.

Results

Annotations

Interfaces

Classes

Enums

Exceptions

Class Overview

Summary

Public Methods

public View findNearestTouchable (ViewGroup root, int x, int y, int direction, int[] deltas)

Parameters

Returns

public final View findNextFocus (ViewGroup root, View focused, int direction)

Parameters

Returns

public View findNextFocusFromRect (ViewGroup root, Rect focusedRect, int direction)

Parameters

Returns

public static FocusFinder getInstance ()

java.lang.Object
↳	android.view.FocusFinder