ColorDrawable


public class ColorDrawable
extends Drawable

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


A specialized Drawable that fills the Canvas with a specified color. Note that a ColorDrawable ignores the ColorFilter.

It can be defined in an XML file with the <color> element.

Summary

XML attributes

android:color The color to use. 

Public constructors

ColorDrawable()

Creates a new black ColorDrawable.

ColorDrawable(int color)

Creates a new ColorDrawable with the specified color.

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()

Returns the alpha value of this drawable's color.

int getChangingConfigurations()

Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.

int getColor()

Gets the drawable's color value.

ColorFilter getColorFilter()

Returns the color filter applied to this color configured by setColorFilter(android.graphics.ColorFilter)

Drawable.ConstantState getConstantState()

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

int getOpacity()

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

void getOutline(Outline outline)

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

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()

A mutable BitmapDrawable still shares its Bitmap with any other Drawable that comes from the same resource.

void setAlpha(int alpha)

Applies the given alpha to the underlying color.

void setColor(int color)

Sets the drawable's color value.

void setColorFilter(ColorFilter colorFilter)

Sets the color filter applied to this color.

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.

Protected methods

boolean onStateChange(int[] stateSet)

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

Inherited methods

XML attributes

android:color

The color to use.

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

Public constructors

ColorDrawable

Added in API level 1
public ColorDrawable ()

Creates a new black ColorDrawable.

ColorDrawable

Added in API level 1
public ColorDrawable (int color)

Creates a new ColorDrawable with the specified color.

Parameters
color int: The color to draw.

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: the theme to apply 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 1
public int getAlpha ()

Returns the alpha value of this drawable's color. Note this may not be the same alpha value provided in Drawable#setAlpha(int). Instead this will return the alpha of the color combined with the alpha provided by setAlpha

Returns
int A value between 0 and 255.

See also:

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 11
public int getColor ()

Gets the drawable's color value.

Returns
int int The color to draw.

getColorFilter

Added in API level 21
public ColorFilter getColorFilter ()

Returns the color filter applied to this color configured by setColorFilter(android.graphics.ColorFilter)

Returns
ColorFilter This value may be null.

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.

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

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.

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: Resources used to resolve attribute values This value cannot be null.

parser XmlPullParser: XML parser from which to inflate this Drawable This value cannot be null.

attrs AttributeSet: Base set of attribute values This value cannot be null.

theme Resources.Theme: Theme to apply, 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 ()

A mutable BitmapDrawable still shares its Bitmap with any other Drawable that comes from the same resource.

Returns
Drawable This drawable.

setAlpha

Added in API level 1
public void setAlpha (int alpha)

Applies the given alpha to the underlying color. Note if the color already has an alpha applied to it, this will apply this alpha to the existing value instead of overwriting it.

Parameters
alpha int: The alpha value to set, between 0 and 255.

setColor

Added in API level 11
public void setColor (int color)

Sets the drawable's color value. This action will clobber the results of prior calls to setAlpha(int) on this object, which side-affected the underlying color.

Parameters
color int: The color to draw.

setColorFilter

Added in API level 1
public void setColorFilter (ColorFilter colorFilter)

Sets the color filter applied to this color.

Only supported on version Build.VERSION_CODES.LOLLIPOP and above. Calling this method has no effect on earlier versions.

Parameters
colorFilter ColorFilter: The color filter to apply, or null to remove the existing color filter

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: Color state list to use for tinting this drawable, or null to clear the tint

Protected methods

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.