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Added in API level 1

InsetDrawable

public class InsetDrawable
extends DrawableWrapper

java.lang.Object
   ↳ android.graphics.drawable.Drawable
     ↳ android.graphics.drawable.DrawableWrapper
       ↳ android.graphics.drawable.InsetDrawable


A Drawable that insets another Drawable by a specified distance. This is used when a View needs a background that is smaller than the View's actual bounds.

It can be defined in an XML file with the <inset> element. For more information, see the guide to Drawable Resources.

Summary

XML attributes

android:drawable Reference to a drawable resource to use for the frame. 
android:insetBottom  
android:insetLeft  
android:insetRight  
android:insetTop  
android:visible Provides initial visibility state of the drawable; the default value is false. 

Public constructors

InsetDrawable(Drawable drawable, int inset)

Creates a new inset drawable with the specified inset.

InsetDrawable(Drawable drawable, int insetLeft, int insetTop, int insetRight, int insetBottom)

Creates a new inset drawable with the specified insets.

Public methods

void applyTheme(Resources.Theme t)

Applies the specified theme to this Drawable and its children.

int getIntrinsicHeight()

Return the intrinsic height of the underlying drawable object.

int getIntrinsicWidth()

Return the intrinsic width of the underlying drawable object.

int getOpacity()

Return the opacity/transparency of this Drawable.

void getOutline(Outline outline)

Called to get the drawable to populate the Outline that defines its drawing area.

boolean getPadding(Rect padding)

Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds.

void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme)

Inflate this Drawable from an XML resource optionally styled by a theme.

Protected methods

void onBoundsChange(Rect bounds)

Override this in your subclass to change appearance if you vary based on the bounds.

Inherited methods

From class android.graphics.drawable.DrawableWrapper
From class android.graphics.drawable.Drawable
From class java.lang.Object
From interface android.graphics.drawable.Drawable.Callback

XML attributes

android:drawable

Reference to a drawable resource to use for the frame. If not given, the drawable must be defined by the first child tag.

Must be a reference to another resource, in the form "@[+][package:]type:name" or to a theme attribute in the form "?[package:][type:]name".

This corresponds to the global attribute resource symbol drawable.

android:insetBottom

android:insetLeft

android:insetRight

android:insetTop

android:visible

Provides initial visibility state of the drawable; the default value is false. See setVisible(boolean, boolean).

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol visible.

Public constructors

InsetDrawable

Added in API level 1
InsetDrawable (Drawable drawable, 
                int inset)

Creates a new inset drawable with the specified inset.

Parameters
drawable Drawable: The drawable to inset.
inset int: Inset in pixels around the drawable.

InsetDrawable

Added in API level 1
InsetDrawable (Drawable drawable, 
                int insetLeft, 
                int insetTop, 
                int insetRight, 
                int insetBottom)

Creates a new inset drawable with the specified insets.

Parameters
drawable Drawable: The drawable to inset.
insetLeft int: Left inset in pixels.
insetTop int: Top inset in pixels.
insetRight int: Right inset in pixels.
insetBottom int: Bottom inset in pixels.

Public methods

applyTheme

Added in API level 21
void applyTheme (Resources.Theme t)

Applies the specified theme to this Drawable and its children.

Parameters
t Resources.Theme

getIntrinsicHeight

Added in API level 1
int getIntrinsicHeight ()

Return the intrinsic height of the underlying drawable object. Returns -1 if it has no intrinsic height, such as with a solid color.

Returns
int

getIntrinsicWidth

Added in API level 1
int getIntrinsicWidth ()

Return the intrinsic width of the underlying drawable object. Returns -1 if it has no intrinsic width, such as with a solid color.

Returns
int

getOpacity

Added in API level 1
int getOpacity ()

Return the opacity/transparency of this Drawable. The returned value is one of the abstract format constants in PixelFormat: UNKNOWN, TRANSLUCENT, TRANSPARENT, or OPAQUE.

An OPAQUE drawable is one that draws all all content within its bounds, completely covering anything behind the drawable. A TRANSPARENT drawable is one that draws nothing within its bounds, allowing everything behind it to show through. A TRANSLUCENT drawable is a drawable in any other state, where the drawable will draw some, but not all, of the content within its bounds and at least some content behind the drawable will be visible. If the visibility of the drawable's contents cannot be determined, the safest/best return value is TRANSLUCENT.

Generally a Drawable should be as conservative as possible with the value it returns. For example, if it contains multiple child drawables and only shows one of them at a time, if only one of the children is TRANSLUCENT and the others are OPAQUE then TRANSLUCENT should be returned. You can use the method resolveOpacity(int, int) to perform a standard reduction of two opacities to the appropriate single output.

Note that the returned value does not necessarily take into account a custom alpha or color filter that has been applied by the client through the setAlpha(int) or setColorFilter(ColorFilter) methods. Some subclasses, such as BitmapDrawable, ColorDrawable, and GradientDrawable, do account for the value of setAlpha(int), but the general behavior is dependent upon the implementation of the subclass.

Returns
int int The opacity class of the Drawable.

getOutline

Added in API level 21
void getOutline (Outline outline)

Called to get the drawable to populate the Outline that defines its drawing area.

This method is called by the default ViewOutlineProvider to define the outline of the View.

The default behavior defines the outline to be the bounding rectangle of 0 alpha. Subclasses that wish to convey a different shape or alpha value must override this method.

Parameters
outline Outline

getPadding

Added in API level 1
boolean getPadding (Rect padding)

Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds. Positive values move toward the center of the Drawable (set Rect.inset).

Parameters
padding Rect
Returns
boolean true if this drawable actually has a padding, else false. When false is returned, the padding is always set to 0.

inflate

Added in API level 21
void inflate (Resources r, 
                XmlPullParser parser, 
                AttributeSet attrs, 
                Resources.Theme theme)

Inflate this Drawable from an XML resource optionally styled by a theme.

Parameters
r Resources: Resources used to resolve attribute values
parser XmlPullParser: XML parser from which to inflate this Drawable
attrs AttributeSet: Base set of attribute values
theme Resources.Theme: Theme to apply, may be null
Throws
XmlPullParserException
IOException

Protected methods

onBoundsChange

Added in API level 1
void onBoundsChange (Rect bounds)

Override this in your subclass to change appearance if you vary based on the bounds.

Parameters
bounds Rect
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