DrawableWrapper

DrawableWrapper

DrawableWrapper(dr: Drawable?)

Creates a new wrapper around the specified drawable.

applyTheme

open fun applyTheme(t: Resources.Theme): Unit

Applies the specified theme to this Drawable and its children.

canApplyTheme

open fun canApplyTheme(): Boolean

draw

open fun draw(canvas: Canvas): Unit

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

getAlpha

open fun getAlpha(): Int

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.

getChangingConfigurations

open fun getChangingConfigurations(): Int

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.

getColorFilter

open fun getColorFilter(): ColorFilter?

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

getConstantState

open fun getConstantState(): Drawable.ConstantState?

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

getDrawable

open fun getDrawable(): Drawable?

getHotspotBounds

open fun getHotspotBounds(outRect: Rect): Unit

Populates outRect with the hotspot bounds.

getIntrinsicHeight

open fun getIntrinsicHeight(): Int

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.

getIntrinsicWidth

open fun getIntrinsicWidth(): Int

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.

getOpacity

open fun getOpacity(): Int

Return the opacity/transparency of this Drawable. The returned value is one of the abstract format constants in android.graphics.PixelFormat: android.graphics.PixelFormat#UNKNOWN, android.graphics.PixelFormat#TRANSLUCENT, android.graphics.PixelFormat#TRANSPARENT, or android.graphics.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 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 or #setColorFilter methods. Some subclasses, such as BitmapDrawable, ColorDrawable, and GradientDrawable, do account for the value of setAlpha, but the general behavior is dependent upon the implementation of the subclass.

getOpticalInsets

open fun getOpticalInsets(): Insets

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

getOutline

open fun getOutline(outline: Outline): Unit

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

This method is called by the default android.view.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.

getPadding

open fun getPadding(padding: Rect): Boolean

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).

hasFocusStateSpecified

open fun hasFocusStateSpecified(): Boolean

Indicates whether this drawable has at least one state spec explicitly specifying android.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 android.R.attr#state_focused to make sure the user knows which view is holding the focus.

inflate

open fun inflate(
    r: Resources, 
    parser: XmlPullParser, 
    attrs: AttributeSet, 
    theme: Resources.Theme?
): Unit

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.

invalidateDrawable

open fun invalidateDrawable(who: Drawable): Unit

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).

isStateful

open fun isStateful(): Boolean

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.

jumpToCurrentState

open fun jumpToCurrentState(): Unit

If this Drawable does transition animations between states, ask that it immediately jump to the current state and skip any active animations.

mutate

open fun mutate(): Drawable

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.

onLayoutDirectionChanged

open fun onLayoutDirectionChanged(layoutDirection: Int): Boolean

Called when the drawable's resolved layout direction changes.

scheduleDrawable

open fun scheduleDrawable(
    who: Drawable, 
    what: Runnable, 
    when: Long
): Unit

A Drawable can call this to schedule the next frame of its animation. An implementation can generally simply call android.os.Handler#postAtTime(Runnable, Object, long) with the parameters (what, who, when) to perform the scheduling.

setAlpha

open fun setAlpha(alpha: Int): Unit

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

setColorFilter

open fun setColorFilter(colorFilter: ColorFilter?): Unit

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.

setDrawable

open fun setDrawable(dr: Drawable?): Unit

Sets the wrapped drawable.

setHotspot

open fun setHotspot(
    x: Float, 
    y: Float
): Unit

Specifies the hotspot's location within the drawable.

setHotspotBounds

open fun setHotspotBounds(
    left: Int, 
    top: Int, 
    right: Int, 
    bottom: Int
): Unit

Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds.

setTintBlendMode

open fun setTintBlendMode(blendMode: BlendMode!): Unit

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)

setTintList

open fun setTintList(tint: ColorStateList?): Unit

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.

setVisible

open fun setVisible(
    visible: Boolean, 
    restart: Boolean
): Boolean

Set whether this Drawable is visible. This generally does not impact the Drawable's behavior, but is a hint that can be used by some Drawables, for example, to decide whether run animations.

unscheduleDrawable

open fun unscheduleDrawable(
    who: Drawable, 
    what: Runnable
): Unit

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable. An implementation can generally simply call android.os.Handler#removeCallbacks(Runnable, Object) with the parameters (what, who) to unschedule the drawable.

onBoundsChange

protected open fun onBoundsChange(bounds: Rect): Unit

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

onLevelChange

protected open fun onLevelChange(level: Int): Boolean

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

onStateChange

protected open fun onStateChange(state: IntArray): Boolean

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