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Android APIs
public class

ColorDrawable

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

Class Overview

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
Attribute Name Related Method Description
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 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.
Drawable.ConstantState getConstantState()
Return a Drawable.ConstantState instance that holds the shared state of this Drawable.
int getOpacity()
Return the opacity/transparency of this Drawable.
void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
Inflate this Drawable from an XML resource.
void setAlpha(int alpha)
Sets the color's alpha value.
void setColor(int color)
Sets the drawable's color value.
void setColorFilter(ColorFilter colorFilter)
Setting a color filter on a ColorDrawable has no effect.
[Expand]
Inherited Methods
From class android.graphics.drawable.Drawable
From class java.lang.Object

XML Attributes

android:color

The color to use.

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

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 color.

Related Methods

Public Constructors

public ColorDrawable ()

Since: API Level 1

Creates a new black ColorDrawable.

public ColorDrawable (int color)

Since: API Level 1

Creates a new ColorDrawable with the specified color.

Parameters
color The color to draw.

Public Methods

public void draw (Canvas canvas)

Since: API Level 1

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

Parameters
canvas The canvas to draw into

public int getAlpha ()

Since: API Level 1

Returns the alpha value of this drawable's color.

Returns
  • A value between 0 and 255.

public int getChangingConfigurations ()

Since: API Level 1

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
  • Returns a mask of the changing configuration parameters, as defined by Configuration.

public int getColor ()

Since: API Level 11

Gets the drawable's color value.

Returns
  • int The color to draw.

public Drawable.ConstantState getConstantState ()

Since: API Level 1

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

Returns
  • The ConstantState associated to that Drawable.

public int getOpacity ()

Since: API Level 1

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

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 take into account a custom alpha or color filter that has been applied by the client through the setAlpha(int) or setColorFilter(ColorFilter) methods.

Returns
  • int The opacity class of the Drawable.

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

Since: API Level 1

Inflate this Drawable from an XML resource.

public void setAlpha (int alpha)

Since: API Level 1

Sets the color's alpha value.

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

public void setColor (int color)

Since: API Level 11

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 The color to draw.

public void setColorFilter (ColorFilter colorFilter)

Since: API Level 1

Setting a color filter on a ColorDrawable has no effect.

Parameters
colorFilter Ignore.