Added in API level 1

Summary: XML Attrs | Constants | Ctors | Methods | Protected Methods | Inherited Methods

GradientDrawable

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Kotlin |Java

public class GradientDrawable
extends Drawable

java.lang.Object
↳	android.graphics.drawable.Drawable
	↳	android.graphics.drawable.GradientDrawable

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A Drawable with a color gradient for buttons, backgrounds, etc.

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

Summary

XML attributes
android:angle	Angle of the gradient, used only with linear gradient.
android:bottom	Amount of bottom padding inside the gradient shape.
android:centerColor	Optional center color.
android:centerX	X-position of the center point of the gradient within the shape as a fraction of the width.
android:centerY	Y-position of the center point of the gradient within the shape as a fraction of the height.
android:color	Solid color for the gradient shape.
android:color	Color of the gradient shape's stroke.
android:dashGap	Gap between dashes in the stroke.
android:dashWidth	Length of a dash in the stroke.
android:endColor	End color of the gradient.
android:gradientRadius	Radius of the gradient, used only with radial gradient.
android:height	Height of the gradient shape.
android:innerRadius	Inner radius of the ring.
android:innerRadiusRatio	Inner radius of the ring expressed as a ratio of the ring's width.
android:left	Amount of left padding inside the gradient shape.
android:right	Amount of right padding inside the gradient shape.
android:shape	Indicates what shape to fill with a gradient.
android:startColor	Start color of the gradient.
android:thickness	Thickness of the ring.
android:thicknessRatio	Thickness of the ring expressed as a ratio of the ring's width.
android:top	Amount of top padding inside the gradient shape.
android:type	Type of gradient.
android:useLevel	Whether the drawable level value (see Drawable.getLevel()) is used to scale the gradient.
android:useLevel	Whether the drawable level value (see Drawable.getLevel()) is used to scale the shape.
android:visible	Indicates whether the drawable should intially be visible.
android:width	Width of the gradient shape.
android:width	Width of the gradient shape's stroke.

Constants
int	LINE Shape is a line
int	LINEAR_GRADIENT Gradient is linear (default.)
int	OVAL Shape is an ellipse
int	RADIAL_GRADIENT Gradient is circular.
int	RECTANGLE Shape is a rectangle, possibly with rounded corners
int	RING Shape is a ring.
int	SWEEP_GRADIENT Gradient is a sweep.

Public constructors
GradientDrawable()
GradientDrawable(GradientDrawable.Orientation orientation, int[] colors) Create a new gradient drawable given an orientation and an array of colors for the gradient.

Public methods
void	applyTheme(Resources.Theme t) Applies the specified theme to this Drawable and its children.
boolean	canApplyTheme()
void	draw(Canvas canvas) Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).
int	getAlpha() Gets the current alpha value for the drawable.
int	getChangingConfigurations() Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.
ColorStateList	getColor() Returns the color state list used to fill the shape, or null if the shape is filled with a gradient or has no fill color.
ColorFilter	getColorFilter() Returns the current color filter, or null if none set.
int[]	getColors() Returns the colors used to draw the gradient, or null if the gradient is drawn using a single color or no colors.
Drawable.ConstantState	getConstantState() Return a ConstantState instance that holds the shared state of this Drawable.
float[]	getCornerRadii() Returns the radii for each of the 4 corners.
float	getCornerRadius() Returns the radius for the corners of the gradient, that was previously set with setCornerRadius(float).
float	getGradientCenterX() Returns the X-position of the center of the gradient as a fraction of the width.
float	getGradientCenterY() Returns the Y-position of the center of this gradient as a fraction of the height.
float	getGradientRadius() Returns the radius of the gradient in pixels.
int	getGradientType() Returns the type of gradient used by this drawable, one of LINEAR_GRADIENT, RADIAL_GRADIENT, or SWEEP_GRADIENT.
int	getInnerRadius() Return the inner radius of the ring The units of this value are pixels.
float	getInnerRadiusRatio() Return the inner radius of the ring expressed as a ratio of the ring's width.
int	getIntrinsicHeight() Returns the drawable's intrinsic height.
int	getIntrinsicWidth() Returns the drawable's intrinsic width.
int	getOpacity() This method is deprecated. This method is no longer used in graphics optimizations
Insets	getOpticalInsets() Return in insets the layout insets suggested by this Drawable for use with alignment operations during layout.
GradientDrawable.Orientation	getOrientation() Returns the orientation of the gradient defined in 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.
int	getShape() Returns the type of shape used by this drawable, one of LINE, OVAL, RECTANGLE or RING.
int	getThickness() Return the thickness of the ring The units of this value are pixels.
float	getThicknessRatio() Return the thickness ratio of the ring expressed as a ratio of the ring's width.
boolean	getUseLevel() Returns whether this drawable's level property will be used to scale the gradient.
boolean	hasFocusStateSpecified() Indicates whether this drawable has at least one state spec explicitly specifying R.attr.state_focused.
void	inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme) Inflate this Drawable from an XML resource optionally styled by a theme.
boolean	isStateful() Indicates whether this drawable will change its appearance based on state.
Drawable	mutate() Make this drawable mutable.
void	setAlpha(int alpha) Specify an alpha value for the drawable.
void	setColor(ColorStateList colorStateList) Changes this drawable to use a single color state list instead of a gradient.
void	setColor(int argb) Changes this drawable to use a single color instead of a gradient.
void	setColorFilter(ColorFilter colorFilter) Specify an optional color filter for the drawable.
void	setColors(int[] colors, float[] offsets) Sets the colors and offsets used to draw the gradient.
void	setColors(int[] colors) Sets the colors used to draw the gradient.
void	setCornerRadii(float[] radii) Specifies radii for each of the 4 corners.
void	setCornerRadius(float radius) Specifies the radius for the corners of the gradient.
void	setDither(boolean dither) This method is deprecated. This property is ignored.
void	setGradientCenter(float x, float y) Sets the position of the center of the gradient as a fraction of the width and height.
void	setGradientRadius(float gradientRadius) Sets the radius of the gradient.
void	setGradientType(int gradient) Sets the type of gradient used by this drawable.
void	setInnerRadius(int innerRadius) Configure the inner radius of the ring.
void	setInnerRadiusRatio(float innerRadiusRatio) Inner radius of the ring expressed as a ratio of the ring's width.
void	setOrientation(GradientDrawable.Orientation orientation) Sets the orientation of the gradient defined in this drawable.
void	setPadding(int left, int top, int right, int bottom) Configure the padding of the gradient shape
void	setShape(int shape) Sets the type of shape used to draw the gradient.
void	setSize(int width, int height) Sets the size of the shape drawn by this drawable.
void	setStroke(int width, ColorStateList colorStateList) Set the stroke width and color state list for the drawable.
void	setStroke(int width, ColorStateList colorStateList, float dashWidth, float dashGap) Set the stroke width and color state list for the drawable.
void	setStroke(int width, int color, float dashWidth, float dashGap) Set the stroke width and color for the drawable.
void	setStroke(int width, int color) Set the stroke width and color for the drawable.
void	setThickness(int thickness) Configure the thickness of the ring.
void	setThicknessRatio(float thicknessRatio) Configure the thickness of the ring expressed as a ratio of the ring's width.
void	setTintBlendMode(BlendMode blendMode) Specifies a tint blending mode for this drawable.
void	setTintList(ColorStateList tint) Specifies tint color for this drawable as a color state list.
void	setUseLevel(boolean useLevel) Sets whether this drawable's level property will be used to scale the gradient.

Protected methods
void	onBoundsChange(Rect r) Override this in your subclass to change appearance if you vary based on the bounds.
boolean	onLevelChange(int level) Override this in your subclass to change appearance if you vary based on level.
boolean	onStateChange(int[] stateSet) Override this in your subclass to change appearance if you recognize the specified state.

Inherited methods
From class android.graphics.drawable.Drawable void applyTheme(Resources.Theme t) Applies the specified theme to this Drawable and its children. boolean canApplyTheme() void clearColorFilter() Removes the color filter for this drawable. final Rect copyBounds() Return a copy of the drawable's bounds in a new Rect. final void copyBounds(Rect bounds) Return a copy of the drawable's bounds in the specified Rect (allocated by the caller). static Drawable createFromPath(String pathName) Create a drawable from file path name. static Drawable createFromResourceStream(Resources res, TypedValue value, InputStream is, String srcName, BitmapFactory.Options opts) This method was deprecated in API level 28. Prefer the version without an Options object. static Drawable createFromResourceStream(Resources res, TypedValue value, InputStream is, String srcName) Create a drawable from an inputstream, using the given resources and value to determine density information. static Drawable createFromStream(InputStream is, String srcName) Create a drawable from an inputstream static Drawable createFromXml(Resources r, XmlPullParser parser) Create a drawable from an XML document. static Drawable createFromXml(Resources r, XmlPullParser parser, Resources.Theme theme) Create a drawable from an XML document using an optional Theme. static Drawable createFromXmlInner(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme) Create a drawable from inside an XML document using an optional Theme. static Drawable createFromXmlInner(Resources r, XmlPullParser parser, AttributeSet attrs) Create from inside an XML document. abstract void draw(Canvas canvas) Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter). int getAlpha() Gets the current alpha value for the drawable. final Rect getBounds() Return the drawable's bounds Rect. Drawable.Callback getCallback() Return the current Callback implementation attached to this Drawable. int getChangingConfigurations() Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created. ColorFilter getColorFilter() Returns the current color filter, or null if none set. Drawable.ConstantState getConstantState() Return a ConstantState instance that holds the shared state of this Drawable. Drawable getCurrent() Rect getDirtyBounds() Return the drawable's dirty bounds Rect. void getHotspotBounds(Rect outRect) Populates outRect with the hotspot bounds. int getIntrinsicHeight() Returns the drawable's intrinsic height. int getIntrinsicWidth() Returns the drawable's intrinsic width. int getLayoutDirection() Returns the resolved layout direction for this Drawable. final int getLevel() Retrieve the current level. int getMinimumHeight() Returns the minimum height suggested by this Drawable. int getMinimumWidth() Returns the minimum width suggested by this Drawable. abstract int getOpacity() This method was deprecated in API level 29. This method is no longer used in graphics optimizations Insets getOpticalInsets() Return in insets the layout insets suggested by this Drawable for use with alignment operations during layout. 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. int[] getState() Describes the current state, as a union of primitive states, such as R.attr.state_focused, R.attr.state_selected, etc. Region getTransparentRegion() Returns a Region representing the part of the Drawable that is completely transparent. boolean hasFocusStateSpecified() Indicates whether this drawable has at least one state spec explicitly specifying R.attr.state_focused. void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme) Inflate this Drawable from an XML resource optionally styled by a theme. void inflate(Resources r, XmlPullParser parser, AttributeSet attrs) Inflate this Drawable from an XML resource. void invalidateSelf() Use the current Callback implementation to have this Drawable redrawn. boolean isAutoMirrored() Tells if this Drawable will be automatically mirrored when its layout direction is RTL right-to-left. boolean isFilterBitmap() boolean isProjected() Whether this drawable requests projection. boolean isStateful() Indicates whether this drawable will change its appearance based on state. final boolean isVisible() void jumpToCurrentState() If this Drawable does transition animations between states, ask that it immediately jump to the current state and skip any active animations. Drawable mutate() Make this drawable mutable. void onBoundsChange(Rect bounds) Override this in your subclass to change appearance if you vary based on the bounds. boolean onLayoutDirectionChanged(int layoutDirection) Called when the drawable's resolved layout direction changes. boolean onLevelChange(int level) Override this in your subclass to change appearance if you vary based on level. boolean onStateChange(int[] state) Override this in your subclass to change appearance if you recognize the specified state. static int resolveOpacity(int op1, int op2) Return the appropriate opacity value for two source opacities. void scheduleSelf(Runnable what, long when) Use the current Callback implementation to have this Drawable scheduled. abstract void setAlpha(int alpha) Specify an alpha value for the drawable. void setAutoMirrored(boolean mirrored) Set whether this Drawable is automatically mirrored when its layout direction is RTL (right-to left). void setBounds(int left, int top, int right, int bottom) Specify a bounding rectangle for the Drawable. void setBounds(Rect bounds) Specify a bounding rectangle for the Drawable. final void setCallback(Drawable.Callback cb) Bind a Callback object to this Drawable. void setChangingConfigurations(int configs) Set a mask of the configuration parameters for which this drawable may change, requiring that it be re-created. void setColorFilter(int color, PorterDuff.Mode mode) This method was deprecated in API level 29. use setColorFilter(android.graphics.ColorFilter) with an instance of BlendModeColorFilter abstract void setColorFilter(ColorFilter colorFilter) Specify an optional color filter for the drawable. void setDither(boolean dither) This method was deprecated in API level 23. This property is ignored. void setFilterBitmap(boolean filter) Set to true to have the drawable filter its bitmaps with bilinear sampling when they are scaled or rotated. void setHotspot(float x, float y) Specifies the hotspot's location within the drawable. void setHotspotBounds(int left, int top, int right, int bottom) Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds. final boolean setLayoutDirection(int layoutDirection) Set the layout direction for this drawable. final boolean setLevel(int level) Specify the level for the drawable. boolean setState(int[] stateSet) Specify a set of states for the drawable. void setTint(int tintColor) Specifies tint color for this drawable. void setTintBlendMode(BlendMode blendMode) Specifies a tint blending mode for this drawable. void setTintList(ColorStateList tint) Specifies tint color for this drawable as a color state list. void setTintMode(PorterDuff.Mode tintMode) Specifies a tint blending mode for this drawable. boolean setVisible(boolean visible, boolean restart) Set whether this Drawable is visible. void unscheduleSelf(Runnable what) Use the current Callback implementation to have this Drawable unscheduled.
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

XML attributes

android:angle

Angle of the gradient, used only with linear gradient. Must be a multiple of 45 in the range [0, 315].

May be a floating point value, such as "1.2".

android:bottom

Amount of bottom padding inside the gradient shape.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

• setPadding(int,int,int,int)

android:centerColor

Optional center color. For linear gradients, use centerX or centerY to place the center color.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

android:centerX

X-position of the center point of the gradient within the shape as a fraction of the width. The default value is 0.5.

May be a floating point value, such as "1.2".

May be a fractional value, which is a floating point number appended with either % or %p, such as "14.5%". The % suffix always means a percentage of the base size; the optional %p suffix provides a size relative to some parent container.

android:centerY

Y-position of the center point of the gradient within the shape as a fraction of the height. The default value is 0.5.

May be a floating point value, such as "1.2".

May be a fractional value, which is a floating point number appended with either % or %p, such as "14.5%". The % suffix always means a percentage of the base size; the optional %p suffix provides a size relative to some parent container.

android:color

Solid color for the gradient shape.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

android:color

Color of the gradient shape's stroke.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

android:dashGap

Gap between dashes in the stroke.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:dashWidth

Length of a dash in the stroke.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:endColor

End color of the gradient.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

android:gradientRadius

Radius of the gradient, used only with radial gradient. May be an explicit dimension or a fractional value relative to the shape's minimum dimension.

May be a floating point value, such as "1.2".

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

May be a fractional value, which is a floating point number appended with either % or %p, such as "14.5%". The % suffix always means a percentage of the base size; the optional %p suffix provides a size relative to some parent container.

android:height

Height of the gradient shape.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:innerRadius

Inner radius of the ring. When defined, innerRadiusRatio is ignored.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

• setInnerRadius(int)

android:innerRadiusRatio

Inner radius of the ring expressed as a ratio of the ring's width. For instance, if innerRadiusRatio=9, then the inner radius equals the ring's width divided by 9. This value is ignored if innerRadius is defined. Default value is 9.

May be a floating point value, such as "1.2".

Related methods:

• setInnerRadiusRatio(float)

android:left

Amount of left padding inside the gradient shape.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

• setPadding(int,int,int,int)

android:right

Amount of right padding inside the gradient shape.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

• setPadding(int,int,int,int)

android:shape

Indicates what shape to fill with a gradient.

Must be one of the following constant values.

Constant	Value	Description
line	2	Line shape.
oval	1	Oval shape.
rectangle	0	Rectangle shape, with optional rounder corners.
ring	3	Ring shape.

android:startColor

Start color of the gradient.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

android:thickness

Thickness of the ring. When defined, thicknessRatio is ignored.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

• setThickness(int)

android:thicknessRatio

Thickness of the ring expressed as a ratio of the ring's width. For instance, if thicknessRatio=3, then the thickness equals the ring's width divided by 3. This value is ignored if innerRadius is defined. Default value is 3.

May be a floating point value, such as "1.2".

Related methods:

• setThicknessRatio(float)

android:top

Amount of top padding inside the gradient shape.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Related methods:

• setPadding(int,int,int,int)

android:type

Type of gradient. The default type is linear.

Must be one of the following constant values.

Constant	Value	Description
linear	0	Linear gradient extending across the center point.
radial	1	Radial gradient extending from the center point outward.
sweep	2	Sweep (or angular) gradient sweeping counter-clockwise around the center point.

android:useLevel

Whether the drawable level value (see Drawable.getLevel()) is used to scale the gradient. Scaling behavior varies based on gradient type. For "linear", adjusts the ending position along the gradient's axis of orientation. For "radial", adjusts the outer radius. For "sweep", adjusts the ending angle. The default value is false.

May be a boolean value, such as "true" or "false".

Related methods:

• setUseLevel(boolean)

android:useLevel

Whether the drawable level value (see Drawable.getLevel()) is used to scale the shape. Scaling behavior depends on the shape type. For "ring", the angle is scaled from 0 to 360. For all other types, there is no effect. The default value is true.

May be a boolean value, such as "true" or "false".

android:visible

Indicates whether the drawable should intially be visible.

May be a boolean value, such as "true" or "false".

android:width

Width of the gradient shape.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

android:width

Width of the gradient shape's stroke.

May be a dimension value, which is a floating point number appended with a unit such as "14.5sp". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).

Constants

LINE

Added in API level 1

public static final int LINE

Shape is a line

Constant Value: 2 (0x00000002)

LINEAR_GRADIENT

Added in API level 1

public static final int LINEAR_GRADIENT

Gradient is linear (default.)

Constant Value: 0 (0x00000000)

OVAL

Added in API level 1

public static final int OVAL

Shape is an ellipse

Constant Value: 1 (0x00000001)

RADIAL_GRADIENT

Added in API level 1

public static final int RADIAL_GRADIENT

Gradient is circular.

Constant Value: 1 (0x00000001)

RECTANGLE

Added in API level 1

public static final int RECTANGLE

Shape is a rectangle, possibly with rounded corners

Constant Value: 0 (0x00000000)

RING

Added in API level 1

public static final int RING

Shape is a ring.

Constant Value: 3 (0x00000003)

SWEEP_GRADIENT

Added in API level 1

public static final int SWEEP_GRADIENT

Gradient is a sweep.

Constant Value: 2 (0x00000002)

Public constructors

GradientDrawable

Added in API level 1

public GradientDrawable ()

GradientDrawable

Added in API level 1

public GradientDrawable (GradientDrawable.Orientation orientation, 
                int[] colors)

Create a new gradient drawable given an orientation and an array of colors for the gradient.

Parameters
orientation	GradientDrawable.Orientation
colors	int

Public methods

applyTheme

Added in API level 21

public void applyTheme (Resources.Theme t)

Applies the specified theme to this Drawable and its children.

Parameters
t	Resources.Theme: This value cannot be null.

canApplyTheme

Added in API level 21

public boolean canApplyTheme ()

Returns
boolean

draw

Added in API level 1

public void draw (Canvas canvas)

Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).

Parameters
canvas	Canvas: The canvas to draw into This value cannot be null.

getAlpha

Added in API level 19

public int getAlpha ()

Gets the current alpha value for the drawable. 0 means fully transparent, 255 means fully opaque. This method is implemented by Drawable subclasses and the value returned is specific to how that class treats alpha. The default return value is 255 if the class does not override this method to return a value specific to its use of alpha.

Returns
int	Value is between 0 and 255 inclusive

getChangingConfigurations

Added in API level 1

public int getChangingConfigurations ()

Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created. The default implementation returns whatever was provided through setChangingConfigurations(int) or 0 by default. Subclasses may extend this to or in the changing configurations of any other drawables they hold.

Returns

int

Value is either 0 or a combination of ActivityInfo.CONFIG_MCC, ActivityInfo.CONFIG_MNC, ActivityInfo.CONFIG_LOCALE, ActivityInfo.CONFIG_TOUCHSCREEN, ActivityInfo.CONFIG_KEYBOARD, ActivityInfo.CONFIG_KEYBOARD_HIDDEN, ActivityInfo.CONFIG_NAVIGATION, ActivityInfo.CONFIG_ORIENTATION, ActivityInfo.CONFIG_SCREEN_LAYOUT, ActivityInfo.CONFIG_UI_MODE, ActivityInfo.CONFIG_SCREEN_SIZE, ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE, ActivityInfo.CONFIG_DENSITY, ActivityInfo.CONFIG_LAYOUT_DIRECTION, ActivityInfo.CONFIG_COLOR_MODE, ActivityInfo.CONFIG_FONT_SCALE, and ActivityInfo.CONFIG_GRAMMATICAL_GENDER

getColor

Added in API level 24

public ColorStateList getColor ()

Returns the color state list used to fill the shape, or null if the shape is filled with a gradient or has no fill color.

Returns
ColorStateList	the color state list used to fill this gradient, or null

See also:

• setColor(int)
• setColor(ColorStateList)

getColorFilter

Added in API level 21

public ColorFilter getColorFilter ()

Returns the current color filter, or null if none set.

Returns
ColorFilter	This value may be null.

getColors

Added in API level 24

public int[] getColors ()

Returns the colors used to draw the gradient, or null if the gradient is drawn using a single color or no colors.

Returns
int[]	the colors used to draw the gradient, or null

See also:

• setColors(int[])

getConstantState

Added in API level 1

public Drawable.ConstantState getConstantState ()

Return a ConstantState instance that holds the shared state of this Drawable.

Returns
Drawable.ConstantState	The ConstantState associated to that Drawable. This value may be null.

getCornerRadii

Added in API level 24

public float[] getCornerRadii ()

Returns the radii for each of the 4 corners. For each corner, the array contains 2 values, [X_radius, Y_radius]. The corners are ordered top-left, top-right, bottom-right, bottom-left.

If the radius was previously set with setCornerRadius(float), or if the corners are not rounded, this method will return null.

Returns
float[]	an array containing the radii for each of the 4 corners, or null

See also:

• setCornerRadii(float[])

getCornerRadius

Added in API level 24

public float getCornerRadius ()

Returns the radius for the corners of the gradient, that was previously set with setCornerRadius(float).

If the radius was previously cleared via passing null to setCornerRadii(float[]), this method will return 0.

Returns
float	the radius in pixels of the corners of the rectangle shape, or 0

See also:

• setCornerRadius(float)

getGradientCenterX

Added in API level 24

public float getGradientCenterX ()

Returns the X-position of the center of the gradient as a fraction of the width.

Returns
float	the X-position of the center of the gradient

See also:

• setGradientCenter(float, float)

getGradientCenterY

Added in API level 24

public float getGradientCenterY ()

Returns the Y-position of the center of this gradient as a fraction of the height.

Returns
float	the Y-position of the center of the gradient

See also:

• setGradientCenter(float, float)

getGradientRadius

Added in API level 21

public float getGradientRadius ()

Returns the radius of the gradient in pixels. The radius is valid only when the gradient type is set to RADIAL_GRADIENT.

Returns
float	the radius of the gradient in pixels

See also:

• setGradientRadius(float)

getGradientType

Added in API level 24

public int getGradientType ()

Returns the type of gradient used by this drawable, one of LINEAR_GRADIENT, RADIAL_GRADIENT, or SWEEP_GRADIENT.

Returns
int	the type of gradient used by this drawable Value is LINEAR_GRADIENT, RADIAL_GRADIENT, or SWEEP_GRADIENT

See also:

• setGradientType(int)

getInnerRadius

Added in API level 29

public int getInnerRadius ()

Return the inner radius of the ring
The units of this value are pixels.

Related XML Attributes:

• android:innerRadius

Returns
int	The units of this value are pixels. {}

See also:

• setInnerRadius(int)

getInnerRadiusRatio

Added in API level 29

public float getInnerRadiusRatio ()

Return the inner radius of the ring expressed as a ratio of the ring's width.

Related XML Attributes:

• android:innerRadiusRatio

Returns
float

See also:

• setInnerRadiusRatio(float)

getIntrinsicHeight

Added in API level 1

public int getIntrinsicHeight ()

Returns the drawable's intrinsic height.

Intrinsic height is the height at which the drawable would like to be laid out, including any inherent padding. If the drawable has no intrinsic height, such as a solid color, this method returns -1.

Returns
int	the intrinsic height, or -1 if no intrinsic height

getIntrinsicWidth

Added in API level 1

public int getIntrinsicWidth ()

Returns the drawable's intrinsic width.

Intrinsic width is the width at which the drawable would like to be laid out, including any inherent padding. If the drawable has no intrinsic width, such as a solid color, this method returns -1.

Returns
int	the intrinsic width, or -1 if no intrinsic width

getOpacity

Added in API level 1

public int getOpacity ()

This method is deprecated.
This method is no longer used in graphics optimizations

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

getOpticalInsets

Added in API level 29

public Insets getOpticalInsets ()

Return in insets the layout insets suggested by this Drawable for use with alignment operations during layout.

Returns
Insets	This value cannot be null.

getOrientation

Added in API level 16

public GradientDrawable.Orientation getOrientation ()

Returns the orientation of the gradient defined in this drawable.

Returns
GradientDrawable.Orientation	the orientation of the gradient defined in this drawable

See also:

• setOrientation(Orientation)

getOutline

Added in API level 21

public 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: This value cannot be null.

getPadding

Added in API level 1

public 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: This value cannot be null.

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

getShape

Added in API level 24

public int getShape ()

Returns the type of shape used by this drawable, one of LINE, OVAL, RECTANGLE or RING.

Returns
int	the type of shape used by this drawable Value is RECTANGLE, OVAL, LINE, or RING

See also:

• setShape(int)

getThickness

Added in API level 29

public int getThickness ()

Return the thickness of the ring
The units of this value are pixels.

Related XML Attributes:

• android:thickness

Returns
int	The units of this value are pixels. {}

See also:

• setThickness(int)

getThicknessRatio

Added in API level 29

public float getThicknessRatio ()

Return the thickness ratio of the ring expressed as a ratio of the ring's width.

Related XML Attributes:

• android:thicknessRatio

Returns
float

See also:

• setThicknessRatio(float)

getUseLevel

Added in API level 24

public boolean getUseLevel ()

Returns whether this drawable's level property will be used to scale the gradient.

Related XML Attributes:

• android:useLevel

Returns
boolean	true if the gradient should be scaled based on level, false otherwise

See also:

• setUseLevel(boolean)

hasFocusStateSpecified

Added in API level 31

public boolean hasFocusStateSpecified ()

Indicates whether this drawable has at least one state spec explicitly specifying R.attr.state_focused.

Note: A View uses a Drawable instance as its background and it changes its appearance based on a state. On keyboard devices, it should specify its R.attr.state_focused to make sure the user knows which view is holding the focus.

Returns
boolean	true if R.attr.state_focused is specified for this drawable.

inflate

Added in API level 21

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

Inflate this Drawable from an XML resource optionally styled by a theme. This can't be called more than once for each Drawable. Note that framework may have called this once to create the Drawable instance from XML resource.

Parameters
r	Resources: This value cannot be null.
parser	XmlPullParser: This value cannot be null.
attrs	AttributeSet: This value cannot be null.
theme	Resources.Theme: This value may be null.

Throws
IOException
XmlPullParserException

isStateful

Added in API level 1

public boolean isStateful ()

Indicates whether this drawable will change its appearance based on state. Clients can use this to determine whether it is necessary to calculate their state and call setState.

Returns
boolean	True if this drawable changes its appearance based on state, false otherwise.

mutate

Added in API level 3

public Drawable mutate ()

Make this drawable mutable. This operation cannot be reversed. A mutable drawable is guaranteed to not share its state with any other drawable. This is especially useful when you need to modify properties of drawables loaded from resources. By default, all drawables instances loaded from the same resource share a common state; if you modify the state of one instance, all the other instances will receive the same modification. Calling this method on a mutable Drawable will have no effect.

Returns
Drawable	This drawable. This value cannot be null.

setAlpha

Added in API level 1

public void setAlpha (int alpha)

Specify an alpha value for the drawable. 0 means fully transparent, and 255 means fully opaque.

Parameters
alpha	int: Value is between 0 and 255 inclusive

setColor

Added in API level 21

public void setColor (ColorStateList colorStateList)

Changes this drawable to use a single color state list instead of a gradient. Calling this method with a null argument will clear the color and is equivalent to calling setColor(int) with the argument Color#TRANSPARENT.

Note: changing color will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing the color.

Parameters
colorStateList	ColorStateList: The color state list used to fill the shape This value may be null.

See also:

• mutate()
• getColor()

setColor

Added in API level 1

public void setColor (int argb)

Changes this drawable to use a single color instead of a gradient.

Note: changing color will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing the color.

Parameters
argb	int: The color used to fill the shape

See also:

• mutate()
• setColors(int[])
• getColor()

setColorFilter

Added in API level 1

public void setColorFilter (ColorFilter colorFilter)

Specify an optional color filter for the drawable.

If a Drawable has a ColorFilter, each output pixel of the Drawable's drawing contents will be modified by the color filter before it is blended onto the render target of a Canvas.

Pass null to remove any existing color filter.

Note: Setting a non-null color filter disables tint.

Parameters
colorFilter	ColorFilter: This value may be null.

setColors

Added in API level 29

public void setColors (int[] colors, 
                float[] offsets)

Sets the colors and offsets used to draw the gradient.

Each color is specified as an ARGB integer and the array must contain at least 2 colors.

Note: changing colors will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing the colors.

Parameters
colors	int: an array containing 2 or more ARGB colors This value may be null.
offsets	float: optional array of floating point parameters representing the positions of the colors. Null evenly disperses the colors This value may be null.

See also:

• mutate()
• setColors(int[])

setColors

Added in API level 16

public void setColors (int[] colors)

Sets the colors used to draw the gradient.

Each color is specified as an ARGB integer and the array must contain at least 2 colors.

Note: changing colors will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing the colors.

Parameters
colors	int: an array containing 2 or more ARGB colors This value may be null.

See also:

• mutate()
• setColor(int)

setCornerRadii

Added in API level 1

public void setCornerRadii (float[] radii)

Specifies radii for each of the 4 corners. For each corner, the array contains 2 values, [X_radius, Y_radius]. The corners are ordered top-left, top-right, bottom-right, bottom-left. This property is honored only when the shape is of type RECTANGLE.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
radii	float: an array of length >= 8 containing 4 pairs of X and Y radius for each corner, specified in pixels This value may be null.

See also:

• mutate()
• setShape(int)
• setCornerRadius(float)

setCornerRadius

Added in API level 1

public void setCornerRadius (float radius)

Specifies the radius for the corners of the gradient. If this is > 0, then the drawable is drawn in a round-rectangle, rather than a rectangle. This property is honored only when the shape is of type RECTANGLE.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
radius	float: The radius in pixels of the corners of the rectangle shape

See also:

• mutate()
• setCornerRadii(float[])
• setShape(int)

setDither

Added in API level 1

public void setDither (boolean dither)

This method is deprecated.
This property is ignored.

Set to true to have the drawable dither its colors when drawn to a device with fewer than 8-bits per color component.

Parameters
dither	boolean

setGradientCenter

Added in API level 1

public void setGradientCenter (float x, 
                float y)

Sets the position of the center of the gradient as a fraction of the width and height.

The default value is (0.5, 0.5).

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
x	float: the X-position of the center of the gradient
y	float: the Y-position of the center of the gradient

See also:

• mutate()
• setGradientType(int)
• getGradientCenterX()
• getGradientCenterY()

setGradientRadius

Added in API level 1

public void setGradientRadius (float gradientRadius)

Sets the radius of the gradient. The radius is honored only when the gradient type is set to RADIAL_GRADIENT.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
gradientRadius	float: the radius of the gradient in pixels

See also:

• mutate()
• setGradientType(int)
• getGradientRadius()

setGradientType

Added in API level 1

public void setGradientType (int gradient)

Sets the type of gradient used by this drawable.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
gradient	int: The type of the gradient: LINEAR_GRADIENT, RADIAL_GRADIENT or SWEEP_GRADIENT Value is LINEAR_GRADIENT, RADIAL_GRADIENT, or SWEEP_GRADIENT

See also:

• mutate()
• getGradientType()

setInnerRadius

Added in API level 29

public void setInnerRadius (int innerRadius)

Configure the inner radius of the ring.

Related XML Attributes:

• android:innerRadius

Parameters
innerRadius	int: The units of this value are pixels.

See also:

• getInnerRadius()

setInnerRadiusRatio

Added in API level 29

public void setInnerRadiusRatio (float innerRadiusRatio)

Inner radius of the ring expressed as a ratio of the ring's width.

Related XML Attributes:

• android:innerRadiusRatio

Parameters
innerRadiusRatio	float: Value is 0.0f or greater

See also:

• getInnerRadiusRatio()

setOrientation

Added in API level 16

public void setOrientation (GradientDrawable.Orientation orientation)

Sets the orientation of the gradient defined in this drawable.

Note: changing orientation will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing the orientation.

Parameters
orientation	GradientDrawable.Orientation: the desired orientation (angle) of the gradient

See also:

• mutate()
• getOrientation()

setPadding

Added in API level 29

public void setPadding (int left, 
                int top, 
                int right, 
                int bottom)

Configure the padding of the gradient shape

Related XML Attributes:

• android:left
• android:top
• android:right
• android:bottom

Parameters
left	int: Left padding of the gradient shape The units of this value are pixels.
top	int: Top padding of the gradient shape The units of this value are pixels.
right	int: Right padding of the gradient shape The units of this value are pixels.
bottom	int: Bottom padding of the gradient shape The units of this value are pixels.

setShape

Added in API level 1

public void setShape (int shape)

Sets the type of shape used to draw the gradient.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
shape	int: The desired shape for this drawable: LINE, OVAL, RECTANGLE or RING Value is RECTANGLE, OVAL, LINE, or RING

See also:

• mutate()

setSize

Added in API level 1

public void setSize (int width, 
                int height)

Sets the size of the shape drawn by this drawable.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
width	int: The width of the shape used by this drawable
height	int: The height of the shape used by this drawable

See also:

• mutate()
• setGradientType(int)

setStroke

Added in API level 21

public void setStroke (int width, 
                ColorStateList colorStateList)

Set the stroke width and color state list for the drawable. If width is zero, then no stroke is drawn.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
width	int: The width in pixels of the stroke
colorStateList	ColorStateList: The color state list of the stroke

See also:

• mutate()
• setStroke(int, ColorStateList, float, float)

setStroke

Added in API level 21

public void setStroke (int width, 
                ColorStateList colorStateList, 
                float dashWidth, 
                float dashGap)

Set the stroke width and color state list for the drawable. If width is zero, then no stroke is drawn. This method can also be used to dash the stroke.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
width	int: The width in pixels of the stroke
colorStateList	ColorStateList: The color state list of the stroke
dashWidth	float: The length in pixels of the dashes, set to 0 to disable dashes
dashGap	float: The gap in pixels between dashes

See also:

• mutate()
• setStroke(int, ColorStateList)

setStroke

Added in API level 1

public void setStroke (int width, 
                int color, 
                float dashWidth, 
                float dashGap)

Set the stroke width and color for the drawable. If width is zero, then no stroke is drawn. This method can also be used to dash the stroke.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
width	int: The width in pixels of the stroke
color	int: The color of the stroke
dashWidth	float: The length in pixels of the dashes, set to 0 to disable dashes
dashGap	float: The gap in pixels between dashes

See also:

• mutate()
• setStroke(int, int)

setStroke

Added in API level 1

public void setStroke (int width, 
                int color)

Set the stroke width and color for the drawable. If width is zero, then no stroke is drawn.

Note: changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

Parameters
width	int: The width in pixels of the stroke
color	int: The color of the stroke

See also:

• mutate()
• setStroke(int, int, float, float)

setThickness

Added in API level 29

public void setThickness (int thickness)

Configure the thickness of the ring.

Related XML Attributes:

• android:thickness

Parameters
thickness	int: The units of this value are pixels.

setThicknessRatio

Added in API level 29

public void setThicknessRatio (float thicknessRatio)

Configure the thickness of the ring expressed as a ratio of the ring's width.

Related XML Attributes:

• android:thicknessRatio

Parameters
thicknessRatio	float: Value is 0.0f or greater

See also:

• getThicknessRatio()

setTintBlendMode

Added in API level 29

public void setTintBlendMode (BlendMode blendMode)

Specifies a tint blending mode for this drawable.

Defines how this drawable's tint color should be blended into the drawable before it is drawn to screen. Default tint mode is BlendMode#SRC_IN.

Note: Setting a color filter via setColorFilter(android.graphics.ColorFilter)

Parameters
blendMode	BlendMode: This value cannot be null.

setTintList

Added in API level 21

public void setTintList (ColorStateList tint)

Specifies tint color for this drawable as a color state list.

A Drawable's drawing content will be blended together with its tint before it is drawn to the screen. This functions similarly to setColorFilter(int, android.graphics.PorterDuff.Mode).

Note: Setting a color filter via setColorFilter(android.graphics.ColorFilter) or setColorFilter(int, android.graphics.PorterDuff.Mode) overrides tint.

Parameters
tint	ColorStateList: This value may be null.

setUseLevel

Added in API level 1

public void setUseLevel (boolean useLevel)

Sets whether this drawable's level property will be used to scale the gradient. If a gradient is not used, this property has no effect.

Scaling behavior varies based on gradient type:

• LINEAR_GRADIENT adjusts the ending position along the gradient's axis of orientation (see getOrientation())
• RADIAL_GRADIENT adjusts the outer radius
• SWEEP_GRADIENT adjusts the ending angle

  The default value for this property is false.

  Note: This property corresponds to the android:useLevel attribute on the inner <gradient> tag, NOT the android:useLevel attribute on the outer <shape> tag. For example,

  <shape ...>
       <gradient
           ...
           android:useLevel="true" />
   </shape>
   

  Note: Changing this property will affect all instances of a drawable loaded from a resource. It is recommended to invoke mutate() before changing this property.

  Related XML Attributes:

  • android:useLevel

  Parameters
  useLevel	boolean: true if the gradient should be scaled based on level, false otherwise

  See also:

  • mutate()
  • Drawable.setLevel(int)
  • Drawable.getLevel()
  • getUseLevel()

Protected methods

onBoundsChange

Added in API level 1

protected void onBoundsChange (Rect r)

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

Parameters
r	Rect: This value cannot be null.

onLevelChange

Added in API level 1

protected boolean onLevelChange (int level)

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

Parameters
level	int

Returns
boolean	Returns true if the level change has caused the appearance of the Drawable to change (that is, it needs to be drawn), else false if it looks the same and there is no need to redraw it since its last level.

onStateChange

Added in API level 1

protected boolean onStateChange (int[] stateSet)

Override this in your subclass to change appearance if you recognize the specified state.

Parameters
stateSet	int: This value cannot be null.

Returns
boolean	Returns true if the state change has caused the appearance of the Drawable to change (that is, it needs to be drawn), else false if it looks the same and there is no need to redraw it since its last state.