Drawable.Callback

android.graphics.drawable.Drawable.Callback

Known Indirect Subclasses

AbsListView, AbsSeekBar, AbsSpinner, AbsoluteLayout, AdapterView<T extends Adapter>, AnalogClock, AnimationDrawable, AppWidgetHostView, AutoCompleteTextView, Button, CheckBox, CheckedTextView, Chronometer, ClipDrawable, CompoundButton, DatePicker, DialerFilter, DigitalClock, DrawableContainer, EditText, ExpandableListView, ExtractEditText, FrameLayout, GLSurfaceView, Gallery, GridView, HorizontalScrollView, ImageButton, ImageSwitcher, ImageView, InsetDrawable, KeyboardView, LayerDrawable, LevelListDrawable, LinearLayout, ListView, MediaController, MultiAutoCompleteTextView, ProgressBar, RadioButton, RadioGroup, RatingBar, RelativeLayout, RotateDrawable, ScaleDrawable, ScrollView, SeekBar, SlidingDrawer, Spinner, StateListDrawable, SurfaceView, TabHost, TabWidget, TableLayout, TableRow, TextSwitcher, TextView, TimePicker, ToggleButton, TransitionDrawable, TwoLineListItem, VideoView, View, ViewAnimator, ViewFlipper, ViewGroup, ViewStub, ViewSwitcher, WebView, ZoomButton, ZoomControls

AbsListView	Common code shared between ListView and GridView
AbsSeekBar
AbsSpinner	An abstract base class for spinner widgets.
AbsoluteLayout	This class is deprecated. Use FrameLayout, RelativeLayout or a custom layout instead.
AdapterView<T extends Adapter>	An AdapterView is a view whose children are determined by an Adapter.
AnalogClock	This widget display an analogic clock with two hands for hours and minutes.
AnimationDrawable	An object used to create frame-by-frame animations, defined by a series of Drawable objects, which can be used as a View object's background.
AppWidgetHostView	Provides the glue to show AppWidget views.
AutoCompleteTextView	An editable text view that shows completion suggestions automatically while the user is typing.
Button	`Button` represents a push-button widget.
CheckBox	A checkbox is a specific type of two-states button that can be either checked or unchecked.
CheckedTextView	An extension to TextView that supports the Checkable interface.
Chronometer	Class that implements a simple timer.
ClipDrawable	A Drawable that clips another Drawable based on this Drawable's current level value.
CompoundButton	A button with two states, checked and unchecked.
DatePicker	A view for selecting a month / year / day based on a calendar like layout.
DialerFilter
DigitalClock	Like AnalogClock, but digital.
DrawableContainer
EditText	EditText is a thin veneer over TextView that configures itself to be editable.
ExpandableListView	A view that shows items in a vertically scrolling two-level list.
ExtractEditText	Specialization of EditText for showing and interacting with the extracted text in a full-screen input method.
FrameLayout	FrameLayout is designed to block out an area on the screen to display a single item.
GLSurfaceView	An implementation of SurfaceView that uses the dedicated surface for displaying OpenGL rendering.
Gallery	A view that shows items in a center-locked, horizontally scrolling list.
GridView	A view that shows items in two-dimensional scrolling grid.
HorizontalScrollView	Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
ImageButton	An image button displays an image that can be pressed, or clicked, by the user.
ImageSwitcher
ImageView	Displays an arbitrary image, such as an icon.
InsetDrawable	A Drawable that insets another Drawable by a specified distance.
KeyboardView	A view that renders a virtual Keyboard.
LayerDrawable	A Drawable that manages an array of other Drawables.
LevelListDrawable	A resource that manages a number of alternate Drawables, each assigned a maximum numerical value.
LinearLayout	A Layout that arranges its children in a single column or a single row.
ListView	A view that shows items in a vertically scrolling list.
MediaController	A view containing controls for a MediaPlayer.
MultiAutoCompleteTextView	An editable text view, extending AutoCompleteTextView, that can show completion suggestions for the substring of the text where the user is typing instead of necessarily for the entire thing.
ProgressBar	Visual indicator of progress in some operation.
RadioButton	A radio button is a two-states button that can be either checked or unchecked.
RadioGroup	This class is used to create a multiple-exclusion scope for a set of radio buttons.
RatingBar	A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars.
RelativeLayout	A Layout where the positions of the children can be described in relation to each other or to the parent.
RotateDrawable	A Drawable that can rotate another Drawable based on the current level value.
ScaleDrawable	A Drawable that changes the size of another Drawable based on its current level value.
ScrollView	Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
SeekBar	A SeekBar is an extension of ProgressBar that adds a draggable thumb.
SlidingDrawer	SlidingDrawer hides content out of the screen and allows the user to drag a handle to bring the content on screen.
Spinner	A view that displays one child at a time and lets the user pick among them.
StateListDrawable	Lets you assign a number of graphic images to a single Drawable and swap out the visible item by a string ID value.
SurfaceView	Provides a dedicated drawing surface embedded inside of a view hierarchy.
TabHost	Container for a tabbed window view.
TabWidget	Displays a list of tab labels representing each page in the parent's tab collection.
TableLayout	A layout that arranges its children into rows and columns.
TableRow	A layout that arranges its children horizontally.
TextSwitcher	Specialized ViewSwitcher that contains only children of type TextView.
TextView	Displays text to the user and optionally allows them to edit it.
TimePicker	A view for selecting the time of day, in either 24 hour or AM/PM mode.
ToggleButton	Displays checked/unchecked states as a button with a "light" indicator and by default accompanied with the text "ON" or "OFF".
TransitionDrawable	An extension of LayerDrawables that is intended to cross-fade between the first and second layer.
TwoLineListItem	A view group with two children, intended for use in ListViews.
VideoView	Displays a video file.
View	This class represents the basic building block for user interface components.
ViewAnimator	Base class for a FrameLayout container that will perform animations when switching between its views.
ViewFlipper	Simple ViewAnimator that will animate between two or more views that have been added to it.
ViewGroup	A `ViewGroup` is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers.
ViewStub	A ViewStub is an invisible, zero-sized View that can be used to lazily inflate layout resources at runtime.
ViewSwitcher	ViewAnimator that switches between two views, and has a factory from which these views are created.
WebView	A View that displays web pages.
ZoomButton
ZoomControls	The `ZoomControls` class displays a simple set of controls used for zooming and provides callbacks to register for events.

Class Overview

Implement this interface if you want to create an animated drawable that extends Drawable. Upon retrieving a drawable, use setCallback(android.graphics.drawable.Drawable.Callback) to supply your implementation of the interface to the drawable; it uses this interface to schedule and execute animation changes.

Summary

Public Methods
abstract void	invalidateDrawable(Drawable who) Called when the drawable needs to be redrawn.
abstract void	scheduleDrawable(Drawable who, Runnable what, long when) A Drawable can call this to schedule the next frame of its animation.
abstract void	unscheduleDrawable(Drawable who, Runnable what) A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long).

Public Methods

public abstract void invalidateDrawable (Drawable who)

Called when the drawable needs to be redrawn. A view at this point should invalidate itself (or at least the part of itself where the drawable appears).

Parameters

who	The drawable that is requesting the update.

public abstract void scheduleDrawable (Drawable who, Runnable what, long when)

A Drawable can call this to schedule the next frame of its animation. An implementation can generally simply call postAtTime(Runnable, Object, long) with the parameters (what, who, when) to perform the scheduling.

Parameters

who	The drawable being scheduled.
what	The action to execute.
when	The time (in milliseconds) to run. The timebase is uptimeMillis()

public abstract void unscheduleDrawable (Drawable who, Runnable what)

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long). An implementation can generally simply call removeCallbacks(Runnable, Object) with the parameters (what, who) to unschedule the drawable.

Parameters

who	The drawable being unscheduled.
what	The action being unscheduled.

Interfaces

Classes

Enums

Drawable.Callback

Class Overview

Summary

Public Methods

public abstract void invalidateDrawable (Drawable who)

Parameters

public abstract void scheduleDrawable (Drawable who, Runnable what, long when)

Parameters

public abstract void unscheduleDrawable (Drawable who, Runnable what)

Parameters