CastContext

public class CastContext extends Object

A singleton class containing global context for the Cast SDK. The shared instance can be accessed by calling getSharedInstance(Context). To properly initialize CastContext, the application must have a class that implements OptionsProvider interface:

     package com.example.app;

     public class CastOptionsProvider implements OptionsProvider {
         @Override
         public CastOptions getCastOptions(Context appContext) {
             ...
         }
     }
 

and specify its fully qualified class name in the AndroidManifest.xml with the key OPTIONS_PROVIDER_CLASS_NAME_KEY:

     ...
     <meta-data
         android:name="com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"
         android:value="com.example.app.CastOptionsProvider" />
     ...
 

All public methods must be called from the main thread.

Constant Summary

String

OPTIONS_PROVIDER_CLASS_NAME_KEY

The metadata key to specify the fully qualified name of the OptionsProvider implementation in the AndroidManifest.xml.

Public Method Summary

void	addAppVisibilityListener(AppVisibilityListener listener) This method is deprecated. Don't use the SDK to listen to app visibility changes. Use alternative ways for watching activity lifecycle changes such as by overriding Activity lifecycle change methods, or by using Application.ActivityLifecycleCallbacks.
void	addCastStateListener(CastStateListener listener) Adds a CastStateListener to monitor changes of the current CastState.
CastOptions	getCastOptions() Returns the CastOptions.
int	getCastState() Returns the current CastState.
MediaNotificationManager	getMediaNotificationManager() Returns the MediaNotificationManager.
MediaRouteSelector	getMergedSelector() Returns the merged MediaRouteSelector used for discovering devices and deciding whether to show the MediaRouteButton.
PrecacheManager	getPrecacheManager() Returns the PrecacheManager.
SessionManager	getSessionManager() Returns the SessionManager, never returns null.
static CastContext	getSharedInstance(Context context) Returns a shared instance of CastContext.
static CastContext	getSharedInstance() Returns the shared instance of CastContext.
boolean	isAppVisible() This method is deprecated. To check app visibility changes, use alternative ways to watch activity lifecycle changes, such as overriding Activity lifecycle change methods or using Application.ActivityLifecycleCallbacks.
boolean	onDispatchVolumeKeyEventBeforeJellyBean(KeyEvent event) If your application supports SDK versions before JELLY BEAN, you should call this method to delegate the handling of physical volume key events to the SDK so that users can use the physical volume keys to control device volume of the Cast receiver.
void	removeAppVisibilityListener(AppVisibilityListener listener) This method is deprecated. Don't use the SDK to listen to app visibility changes. Use alternative ways for watching activity lifecycle changes such as by overriding Activity lifecycle change methods, or by using Application.ActivityLifecycleCallbacks.
void	removeCastStateListener(CastStateListener listener) Removes a CastStateListener.
void	setReceiverApplicationId(String applicationId) Sets the receiver application ID.

Inherited Method Summary

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()

Constants

public static final String OPTIONS_PROVIDER_CLASS_NAME_KEY

The metadata key to specify the fully qualified name of the OptionsProvider implementation in the AndroidManifest.xml.

Constant Value: "com.google.android.gms.cast.framework.OPTIONS_PROVIDER_CLASS_NAME"

Public Methods

public void addAppVisibilityListener (AppVisibilityListener listener)

This method is deprecated.
Don't use the SDK to listen to app visibility changes. Use alternative ways for watching activity lifecycle changes such as by overriding Activity lifecycle change methods, or by using Application.ActivityLifecycleCallbacks.

Adds an AppVisibilityListener to listen for UI visibility events.

Throws

IllegalStateException	If this method is not called on the main thread.
NullPointerException	If listener is null.

public void addCastStateListener (CastStateListener listener)

Adds a CastStateListener to monitor changes of the current CastState.

Throws

IllegalStateException	If this method is not called on the main thread.
NullPointerException	If listener is null.

public CastOptions getCastOptions ()

Returns the CastOptions.

Throws

IllegalStateException	If this method is not called on the main thread.

public int getCastState ()

Returns the current CastState.

Throws

IllegalStateException	If this method is not called on the main thread.

public MediaNotificationManager getMediaNotificationManager ()

Returns the MediaNotificationManager.

Throws

IllegalStateException	If this method is not called on the main thread.

public MediaRouteSelector getMergedSelector ()

Returns the merged MediaRouteSelector used for discovering devices and deciding whether to show the MediaRouteButton. This selector is merged with any additional SessionProviders that might be registered with the CastContext.

Throws

IllegalStateException	If this method is not called on the main thread.

public PrecacheManager getPrecacheManager ()

Returns the PrecacheManager.

public SessionManager getSessionManager ()

Returns the SessionManager, never returns null.

Throws

IllegalStateException	If this method is not called on the main thread.

public static CastContext getSharedInstance (Context context)

Returns a shared instance of CastContext. The shared instance will be initialized on the first time this method is called.

Parameters

context	An application Context. If this is not an application Context, getApplicationContext() will be called on the given context, to retrieve it.

Throws

IllegalStateException	If This method is not called on the main thread. The fully qualified name of the OptionsProvider implementation is not specified as a metadata in the AndroidManifest.xml with key OPTIONS_PROVIDER_CLASS_NAME_KEY. optionsProviderClass or its nullary constructor is not accessible. Instantiation of OptionsProvider fails for some other reason.

public static CastContext getSharedInstance ()

Returns the shared instance of CastContext. This method must be called after CastContext is initialized through getSharedInstance(Context). Otherwise, this method will return null.

Throws

IllegalStateException	If this method is not called on the main thread.

public boolean isAppVisible ()

This method is deprecated.
To check app visibility changes, use alternative ways to watch activity lifecycle changes, such as overriding Activity lifecycle change methods or using Application.ActivityLifecycleCallbacks.

Returns true if the application is visible.

Throws

IllegalStateException	If this method is not called on the main thread.

public boolean onDispatchVolumeKeyEventBeforeJellyBean (KeyEvent event)

If your application supports SDK versions before JELLY BEAN, you should call this method to delegate the handling of physical volume key events to the SDK so that users can use the physical volume keys to control device volume of the Cast receiver. Clients should override dispatchKeyEvent(KeyEvent) and call this method:

     @Override
     public boolean dispatchKeyEvent(KeyEvent event) {
         return CastContext.getSharedInstance().onDispatchVolumeKeyEventBeforeJellyBean(event)
                 || super.dispatchKeyEvent(event);
     }
 

The amount of volume delta to increase or decrease is set through setVolumeDeltaBeforeIceCreamSandwich(double). This method is a no-op on platform JELLY BEAN and above.

Parameters

event	The dispatched event.

public void removeAppVisibilityListener (AppVisibilityListener listener)

This method is deprecated.
Don't use the SDK to listen to app visibility changes. Use alternative ways for watching activity lifecycle changes such as by overriding Activity lifecycle change methods, or by using Application.ActivityLifecycleCallbacks.

Removes an AppVisibilityListener.

Throws

IllegalStateException	If this method is not called on the main thread.

public void removeCastStateListener (CastStateListener listener)

Removes a CastStateListener.

Throws

IllegalStateException	If this method is not called on the main thread.

public void setReceiverApplicationId (String applicationId)

Sets the receiver application ID. This overrides the receiver application ID specified in CastOptions.

Calling this method will result in the receiver ID used for discovery and application launch being changed. The Cast button status will also changed accordingly. If the new application ID is different than the current one, the current session will be ended if there is any.

Specifying null or an empty string indicates that the app does not want to discover receiver devices or launch a receiver application.

For discovering for multiple application IDs at the same time, or for discovering for other application ID without affect the current session, use MediaRouter APIs instead.

Parameters

applicationId	The receiver application ID that will be used to discover the receiver device and launch the receiver application.

Throws

IllegalStateException	If this method is not called on the main thread.