added in version 22.1.0
belongs to Maven artifact com.android.support:leanback-v17:28.0.0-alpha1

Summary: Methods | Inherited Methods | [Expand All]

BackgroundManager

This package is part of the Android support library which is no longer maintained. The support library has been superseded by AndroidX which is part of Jetpack. We recommend using the AndroidX libraries in all new projects. You should also consider migrating existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library class mappings.

public final class BackgroundManager
extends Object

java.lang.Object
↳	android.support.v17.leanback.app.BackgroundManager

---

Supports background image continuity between multiple Activities.

An Activity should instantiate a BackgroundManager and attach(Window) to the Activity's window. When the Activity is started, the background is initialized to the current background values stored in a continuity service. The background continuity service is updated as the background is updated.

At some point, for example when it is stopped, the Activity may release its background state.

When an Activity is resumed, if the BackgroundManager has not been released, the continuity service is updated from the BackgroundManager state. If the BackgroundManager was released, the BackgroundManager inherits the current state from the continuity service.

When the last Activity is destroyed, the background state is reset.

Backgrounds consist of several layers, from back to front:

• the background Drawable of the theme
• a solid color (set via setColor(int))
• two Drawables, previous and current (set via setBitmap(Bitmap) or setDrawable(Drawable)), which may be in transition

BackgroundManager holds references to potentially large bitmap Drawables. Call release() to release these references when the Activity is not visible.

Summary

Public methods
void	attach(Window window) Makes the background visible on the given Window.
void	attachToView(View sceneRoot) Adds the composite drawable to the given view.
void	clearDrawable() Clears the Drawable set by setDrawable(Drawable) or setBitmap(Bitmap).
int	getColor() Returns the current background color.
Drawable	getDefaultDimLayer() This method was deprecated in API level 25.1.0. No longer support dim layer.
Drawable	getDimLayer() This method was deprecated in API level 25.1.0. No longer support dim layer.
Drawable	getDrawable() Returns the current background Drawable.
static BackgroundManager	getInstance(Activity activity) Returns the BackgroundManager associated with the given Activity.
boolean	isAttached() Returns true if the background manager is currently attached; false otherwise.
boolean	isAutoReleaseOnStop()
void	release() Release references to Drawable/Bitmap.
void	setAutoReleaseOnStop(boolean autoReleaseOnStop) Enable or disable call release() in Activity onStop().
void	setBitmap(Bitmap bitmap) Sets the given bitmap into the background.
void	setColor(int color) Sets the background to the given color.
void	setDimLayer(Drawable drawable) This method was deprecated in API level 25.1.0. No longer support dim layer.
void	setDrawable(Drawable drawable) Sets the given drawable into the background.
void	setThemeDrawableResourceId(int resourceId) Sets the resource id for the drawable to be shown when there is no background set.

Inherited methods
From class java.lang.Object Object clone() boolean equals(Object arg0) void finalize() final Class<?> getClass() int hashCode() final void notify() final void notifyAll() String toString() final void wait(long arg0, int arg1) final void wait(long arg0) final void wait()

Public methods

attach

added in version 22.1.0

void attach (Window window)

Makes the background visible on the given Window. The background manager must be attached when the background is set.

Parameters
window	Window

attachToView

added in version 25.1.0

void attachToView (View sceneRoot)

Adds the composite drawable to the given view.

Parameters
sceneRoot	View

clearDrawable

added in version 25.1.0

void clearDrawable ()

Clears the Drawable set by setDrawable(Drawable) or setBitmap(Bitmap). BackgroundManager will show a solid color set by setColor(int) or theme drawable if color is not provided.

getColor

added in version 22.1.0

int getColor ()

Returns the current background color.

Returns
int

getDefaultDimLayer

added in version 22.1.0

Drawable getDefaultDimLayer ()

This method was deprecated in API level 25.1.0.
No longer support dim layer.

Returns the default drawable used as a dim layer.

Returns
Drawable

getDimLayer

added in version 22.1.0

Drawable getDimLayer ()

This method was deprecated in API level 25.1.0.
No longer support dim layer.

Returns the drawable used as a dim layer.

Returns
Drawable

getDrawable

added in version 22.1.0

Drawable getDrawable ()

Returns the current background Drawable.

Returns
Drawable

getInstance

added in version 22.1.0

BackgroundManager getInstance (Activity activity)

Returns the BackgroundManager associated with the given Activity.

The BackgroundManager will be created on-demand for each individual Activity. Subsequent calls will return the same BackgroundManager created for this Activity.

Parameters
activity	Activity

Returns
BackgroundManager

isAttached

added in version 22.1.0

boolean isAttached ()

Returns true if the background manager is currently attached; false otherwise.

Returns
boolean

isAutoReleaseOnStop

added in version 25.1.0

boolean isAutoReleaseOnStop ()

Returns
boolean	True if release() in Activity.onStop(), false otherwise.

release

added in version 22.1.0

void release ()

Release references to Drawable/Bitmap. Typically called in Activity onStop() to reduce memory overhead when not visible. It's app's responsibility to restore the drawable/bitmap in Activity onStart(). The method is automatically called in onStop() when isAutoReleaseOnStop() is true.

See also:

• setAutoReleaseOnStop(boolean)

setAutoReleaseOnStop

added in version 25.1.0

void setAutoReleaseOnStop (boolean autoReleaseOnStop)

Enable or disable call release() in Activity onStop(). Default is true.

Parameters
autoReleaseOnStop	boolean: True to call release() in Activity onStop(), false otherwise.

setBitmap

added in version 22.1.0

void setBitmap (Bitmap bitmap)

Sets the given bitmap into the background. When using setCoverImageBitmap to set the background, the provided bitmap will be scaled and cropped to correctly fit within the dimensions of the view. The timing for when this becomes visible in the app is undefined and may take place after a small delay.

Parameters
bitmap	Bitmap

setColor

added in version 22.1.0

void setColor (int color)

Sets the background to the given color. The timing for when this becomes visible in the app is undefined and may take place after a small delay.

Parameters
color	int

setDimLayer

added in version 22.1.0

void setDimLayer (Drawable drawable)

This method was deprecated in API level 25.1.0.
No longer support dim layer.

Sets the drawable used as a dim layer.

Parameters
drawable	Drawable

setDrawable

added in version 22.1.0

void setDrawable (Drawable drawable)

Sets the given drawable into the background. The provided Drawable will be used unmodified as the background, without any scaling or cropping applied to it. The timing for when this becomes visible in the app is undefined and may take place after a small delay.

Parameters
drawable	Drawable

setThemeDrawableResourceId

added in version 22.1.0

void setThemeDrawableResourceId (int resourceId)

Sets the resource id for the drawable to be shown when there is no background set. Overrides the window background drawable from the theme. This should be called before attaching.

Parameters
resourceId	int

• Interfaces

  • BrowseFragment.FragmentHost
  • BrowseFragment.MainFragmentAdapterProvider
  • BrowseFragment.MainFragmentRowsAdapterProvider
  • BrowseSupportFragment.FragmentHost
  • BrowseSupportFragment.MainFragmentAdapterProvider
  • BrowseSupportFragment.MainFragmentRowsAdapterProvider
  • HeadersFragment.OnHeaderClickedListener
  • HeadersFragment.OnHeaderViewSelectedListener
  • HeadersSupportFragment.OnHeaderClickedListener
  • HeadersSupportFragment.OnHeaderViewSelectedListener
  • SearchFragment.SearchResultProvider
  • SearchSupportFragment.SearchResultProvider

• Classes

  • BackgroundManager
  • BaseFragment
  • BaseSupportFragment
  • BrandedFragment
  • BrandedSupportFragment
  • BrowseFragment
  • BrowseFragment.BrowseTransitionListener
  • BrowseFragment.FragmentFactory
  • BrowseFragment.ListRowFragmentFactory
  • BrowseFragment.MainFragmentAdapter
  • BrowseFragment.MainFragmentAdapterRegistry
  • BrowseFragment.MainFragmentRowsAdapter
  • BrowseSupportFragment
  • BrowseSupportFragment.BrowseTransitionListener
  • BrowseSupportFragment.FragmentFactory
  • BrowseSupportFragment.ListRowFragmentFactory
  • BrowseSupportFragment.MainFragmentAdapter
  • BrowseSupportFragment.MainFragmentAdapterRegistry
  • BrowseSupportFragment.MainFragmentRowsAdapter
  • DetailsFragment
  • DetailsFragmentBackgroundController
  • DetailsSupportFragment
  • DetailsSupportFragmentBackgroundController
  • ErrorFragment
  • ErrorSupportFragment
  • GuidedStepFragment
  • GuidedStepSupportFragment
  • HeadersFragment
  • HeadersSupportFragment
  • OnboardingFragment
  • OnboardingSupportFragment
  • PlaybackFragment
  • PlaybackFragmentGlueHost
  • PlaybackSupportFragment
  • PlaybackSupportFragmentGlueHost
  • ProgressBarManager
  • RowsFragment
  • RowsFragment.MainFragmentAdapter
  • RowsFragment.MainFragmentRowsAdapter
  • RowsSupportFragment
  • RowsSupportFragment.MainFragmentAdapter
  • RowsSupportFragment.MainFragmentRowsAdapter
  • SearchFragment
  • SearchSupportFragment
  • VerticalGridFragment
  • VerticalGridSupportFragment
  • VideoFragment
  • VideoFragmentGlueHost
  • VideoSupportFragment
  • VideoSupportFragmentGlueHost