public class TrustDrawable extends Drawable
Drawable.Callback, Drawable.ConstantState
Constructor and Description |
---|
TrustDrawable(Context context) |
Modifier and Type | Method and Description |
---|---|
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. 0 means fully transparent,
255 means fully opaque.
|
int |
getOpacity()
Return the opacity/transparency of this Drawable.
|
void |
setAlpha(int alpha)
Specify an alpha value for the drawable. 0 means fully transparent, and
255 means fully opaque.
|
void |
setColorFilter(ColorFilter colorFilter)
Specify an optional color filter for the drawable.
|
void |
setTrustManaged(boolean trustManaged) |
void |
start() |
void |
stop() |
applyTheme, canApplyTheme, clearColorFilter, clearMutated, copyBounds, copyBounds, createFromPath, createFromResourceStream, createFromResourceStream, createFromStream, createFromXml, createFromXml, createFromXmlInner, createFromXmlInner, getBounds, getCallback, getChangingConfigurations, getColorFilter, getConstantState, getCurrent, getDirtyBounds, getHotspotBounds, getIntrinsicHeight, getIntrinsicWidth, getLayoutDirection, getLevel, getMinimumHeight, getMinimumWidth, getOpticalInsets, getOutline, getPadding, getState, getTransparentRegion, inflate, inflate, invalidateSelf, isAutoMirrored, isFilterBitmap, isProjected, isStateful, isVisible, jumpToCurrentState, mutate, obtainAttributes, onBoundsChange, onLayoutDirectionChanged, onLevelChange, onStateChange, parseTintMode, resolveOpacity, scheduleSelf, setAutoMirrored, setBounds, setBounds, setCallback, setChangingConfigurations, setColorFilter, setDither, setFilterBitmap, setHotspot, setHotspotBounds, setLayoutDirection, setLevel, setState, setTint, setTintList, setTintMode, setVisible, setXfermode, unscheduleSelf
public TrustDrawable(Context context)
public void draw(Canvas canvas)
Drawable
public void setAlpha(int alpha)
Drawable
public int getAlpha()
Drawable
public void setColorFilter(ColorFilter colorFilter)
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
.
setColorFilter
in class Drawable
colorFilter
- The color filter to apply, or null
to remove the
existing color filterpublic int getOpacity()
Drawable
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 Drawable.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 Drawable.setAlpha(int)
or Drawable.setColorFilter(android.graphics.ColorFilter)
methods. Some subclasses,
such as BitmapDrawable
, ColorDrawable
, and GradientDrawable
,
do account for the value of Drawable.setAlpha(int)
, but the general behavior is dependent
upon the implementation of the subclass.
getOpacity
in class Drawable
PixelFormat
public void start()
public void stop()
public void setTrustManaged(boolean trustManaged)