Drawable.Callback

android.graphics.drawable.Drawable.Callback

Known Indirect Subclasses

AbsListView, AbsSeekBar, AbsSpinner, AbsoluteLayout, AdapterView<T extends Adapter>, AdapterViewAnimator, AdapterViewFlipper, AnalogClock, and 78 others.

AbsListView	Base class that can be used to implement virtualized lists of items.
AbsSeekBar
AbsSpinner	An abstract base class for spinner widgets.
AbsoluteLayout	This class was deprecated in API level 3. Use `FrameLayout`, `RelativeLayout` or a custom layout instead.
AdapterView<T extends Adapter>	An AdapterView is a view whose children are determined by an `Adapter`.
AdapterViewAnimator	Base class for a `AdapterView` that will perform animations when switching between its views.
AdapterViewFlipper	Simple `ViewAnimator` that will animate between two or more views that have been added to it.
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	Represents a push-button widget.
CalendarView	This class is a calendar widget for displaying and selecting dates.
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.
ContentLoadingProgressBar	ContentLoadingProgressBar implements a ProgressBar that waits a minimum time to be dismissed before showing.
DatePicker	This class is a widget for selecting a date.
DialerFilter
DigitalClock	This class was deprecated in API level 17. It is recommended you use `TextClock` instead.
DrawableContainer	A helper class that contains several `Drawable`s and selects which one to use.
DrawerLayout	DrawerLayout acts as a top-level container for window content that allows for interactive "drawer" views to be pulled out from the edge of the window.
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.
FragmentBreadCrumbs	Helper class for showing "bread crumbs" representing the fragment stack in an activity.
FragmentTabHost	Special TabHost that allows the use of `Fragment` objects for its tab content.
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	This class was deprecated in API level 16. This widget is no longer supported. Other horizontally scrolling widgets include `HorizontalScrollView` and `ViewPager` from the support library.
GestureOverlayView	A transparent overlay for gesture input that can be placed on top of other widgets or contain other widgets.
GridLayout	A layout that places its children in a rectangular grid.
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	Displays a button with an image (instead of text) 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.
MediaRouteButton	The media route button allows the user to select routes and to control the currently selected route.
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.
NumberPicker	A widget that enables the user to select a number form a predefined range.
PagerTabStrip	PagerTabStrip is an interactive indicator of the current, next, and previous pages of a `ViewPager`.
PagerTitleStrip	PagerTitleStrip is a non-interactive indicator of the current, next, and previous pages of a `ViewPager`.
ProgressBar	Visual indicator of progress in some operation.
QuickContactBadge	Widget used to show an image with the standard QuickContact badge and on-click behavior.
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.
SearchView	A widget that provides a user interface for the user to enter a search query and submit a request to a search provider.
SeekBar	A SeekBar is an extension of ProgressBar that adds a draggable thumb.
SlidingDrawer	This class was deprecated in API level 17. This class is not supported anymore. It is recommended you base your own implementation on the source code for the Android Open Source Project if you must use it in your application.
SlidingPaneLayout	SlidingPaneLayout provides a horizontal, multi-pane layout for use at the top level of a UI.
Space	Space is a lightweight View subclass that may be used to create gaps between components in general purpose layouts.
Spinner	A view that displays one child at a time and lets the user pick among them.
StackView
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.
Switch	A Switch is a two-state toggle switch widget that can select between two options.
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.
TextClock	`TextClock` can display the current date and/or time as a formatted string.
TextSwitcher	Specialized `ViewSwitcher` that contains only children of type `TextView`.
TextView	Displays text to the user and optionally allows them to edit it.
TextureView	A TextureView can be used to display a content stream.
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	This class was deprecated in API level 17. This class can be implemented easily by apps using a `RelativeLayout` or a `LinearLayout`.
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.
ViewPager	Layout manager that allows the user to flip left and right through pages of data.
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)

Added in API level 1

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)

Added in API level 1

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)

Added in API level 1

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.

Results

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