Android - An Open Handset Alliance Project

android.graphics.drawable
public static interface

android.graphics.drawable.Drawable.Callback

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

Known Indirect Subclasses

AbsListView, AbsoluteLayout, AdapterView, AnalogClock, AnimationDrawable, AutoCompleteTextView, Button, CheckBox, Chronometer, CompoundButton, DatePicker, DialerFilter, DigitalClock, DrawableContainer, EditText, ExpandableListView, FrameLayout, Gallery, GridView, ImageButton, ImageSwitcher, ImageView, InsetDrawable, LayerDrawable, LevelListDrawable, LinearLayout, ListMenuItemView, ListView, MapView, ProgressBar, RadioButton, RadioGroup, RelativeLayout, RotateDrawable, ScaleDrawable, ScaleLayout, ScrollView, Spinner, StateListDrawable, SurfaceView, TabHost, TabWidget, TableLayout, TableRow, TextSwitcher, TextView, Ticker, TimePicker, TwoLineListItem, VideoView, View, ViewAnimator, ViewFlipper, ViewGroup, ViewSwitcher, WebView, ZoomSlider

AbsListView	Common code shared between ListView and GridView.
AbsoluteLayout	A layout that lets you specify exact locations (x/y coordinates) of its children.
AdapterView	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 define frame-by-frame animations that can be used as a View object's background.
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.
Chronometer	Class that implements a simple timer.
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	Also see ViewGroup.LayoutParams for layout attributes.
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.
FrameLayout	FrameLayout is designed to block out an area on the screen to display a single item.
Gallery	A view that shows items in a center-locked, horizontally scrolling list.
GridView	A view that shows items in two-dimensional scrolling grid.
ImageButton	An image button displays an image that can be pressed, or clicked, by the user.
ImageSwitcher	Also see ViewGroup.LayoutParams for layout attributes.
ImageView	Displays an arbitrary image, such as an icon.
InsetDrawable	A Drawable that insets another Drawable by a specified distance.
LayerDrawable	Drawable that manages an array of other drawables.
LevelListDrawable	A resource that contains a number of alternate images, each assigned a maximum numerical value.
LinearLayout	A Layout that arranges its children in a single column or a single row.
ListMenuItemView	The item view for each item in the ListView-based MenuViews.
ListView	A view that shows items in a vertically scrolling list.
MapView	A View which displays a map.
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.
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 the changes the size of another drawable based on its current level value.
ScaleLayout	Also see ViewGroup.LayoutParams for layout attributes.
ScrollView	Also see ViewGroup.LayoutParams for layout attributes.
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	A TextSwitcher is a specialized ViewSwitcher that contains only children of type TextView.
TextView	Displays text to the user and optionally allows them to edit it.
Ticker	A Ticker is a view that scrolls its child horizontally within its bounds.
TimePicker	A view for selecting the time of day, in either 24 hour or AM/PM mode.
TwoLineListItem	A view group with two children, intended for use in ListViews.
VideoView	Displays a video file.
View	The `View` class represents the basic UI building block.
ViewAnimator	Also see ViewGroup.LayoutParams for layout attributes.
ViewFlipper	Shows only one child at a time.
ViewGroup	A `ViewGroup` is a special view that can contain other views (called children).
ViewSwitcher	Shows only one child at a time.
WebView	The Android SDK provides a custom scheme to load assets from the application's .apk file in WebView.
ZoomSlider	The `ZoomSlider` class displays a vertical slider with marks to denote different zoom levels.

Summary

Public Methods

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

Details

Public Methods

public 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 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 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.

Android - An Open Handset Alliance Project

Documentation

Goodies

android.graphics.drawable.Drawable.Callback

Known Indirect Subclasses

Summary

Public Methods

Details

Public Methods

public void invalidateDrawable(Drawable who)

Parameters

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

Parameters

public void unscheduleDrawable(Drawable who, Runnable what)

Parameters


e.g. "intent" or "activity"