Package icyllis.modernui.graphics.drawable

Class LevelListDrawable

java.lang.Object

icyllis.modernui.graphics.drawable.Drawable

icyllis.modernui.graphics.drawable.DrawableContainer

icyllis.modernui.graphics.drawable.LevelListDrawable

All Implemented Interfaces:

Drawable.Callback

public class LevelListDrawable
extends DrawableContainer

A resource that manages a number of alternate Drawables, each assigned a maximum numerical value. Setting the level value of the object with Drawable.setLevel(int) will load the image with the next greater or equal value assigned to its max attribute.

A good example use of a LevelListDrawable would be a Wi-Fi signal strength indicator icon, with different images to indicate the current signal level.

Nested Class Summary

Nested classes/interfaces inherited from class icyllis.modernui.graphics.drawable.DrawableContainer

DrawableContainer.DrawableContainerState

Nested classes/interfaces inherited from class icyllis.modernui.graphics.drawable.Drawable

Drawable.Callback, Drawable.ConstantState

Field Summary

Fields inherited from class icyllis.modernui.graphics.drawable.Drawable

MAX_LEVEL

Constructor Summary

Constructors

Constructor	Description
LevelListDrawable()

Method Summary

Modifier and Type	Method	Description
void	addLevel(int low, int high, Drawable drawable)
void	clearMutated()	Clears the mutated state, allowing this drawable to be cached and mutated again.
Drawable	mutate()	Make this drawable mutable.
protected boolean	onLevelChange(int level)	Override this in your subclass to change appearance if you vary based on level.
protected void	setConstantState(DrawableContainer.DrawableContainerState state)

Methods inherited from class icyllis.modernui.graphics.drawable.DrawableContainer

draw, getAlpha, getConstantState, getCurrent, getCurrentIndex, getHotspotBounds, getIntrinsicHeight, getIntrinsicWidth, getMinimumHeight, getMinimumWidth, getPadding, hasFocusStateSpecified, invalidateDrawable, isAutoMirrored, isStateful, jumpToCurrentState, onBoundsChange, onLayoutDirectionChanged, onStateChange, scheduleDrawable, selectDrawable, setAlpha, setAutoMirrored, setEnterFadeDuration, setExitFadeDuration, setHotspot, setHotspotBounds, setTintBlendMode, setTintList, setVisible, unscheduleDrawable

Methods inherited from class icyllis.modernui.graphics.drawable.Drawable

applyTheme, canApplyTheme, copyBounds, copyBounds, getBounds, getCallback, getChangingConfigurations, getColorFilter, getLayoutDirection, getLevel, getState, invalidateSelf, isVisible, scaleFromDensity, scaleFromDensity, scheduleSelf, setBounds, setBounds, setCallback, setChangingConfigurations, setColorFilter, setLayoutDirection, setLevel, setState, setTint, unscheduleSelf

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

LevelListDrawable

public LevelListDrawable()

Method Details

addLevel

public void addLevel(int low,
 int high,
 Drawable drawable)

onLevelChange

protected boolean onLevelChange(int level)

Description copied from class: Drawable

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

Overrides:

onLevelChange in class DrawableContainer

Returns:

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.

mutate

@NonNull
public Drawable mutate()

Description copied from class: 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.

Overrides:

mutate in class DrawableContainer

Returns:

This drawable.

See Also:

• Drawable.ConstantState
• Drawable.getConstantState()

clearMutated

public void clearMutated()

Description copied from class: Drawable

Clears the mutated state, allowing this drawable to be cached and mutated again.

Overrides:

clearMutated in class DrawableContainer

setConstantState

protected void setConstantState(@NonNull
 DrawableContainer.DrawableContainerState state)

Overrides:

setConstantState in class DrawableContainer