Provides methods for logging actions that the user takes in the app.
This is a simple example for logging that the user has started to view an article:
UserActions.getInstance(getApplicationContext()).start(
   Actions.newView(
     "Index your app with Google App Index",
     "//example.net/articles/02101984.html"));
 Constant Summary
| String | APP_INDEXING_API_TAG | The tag used for logging debug information for
              calls to UserActions
              class. | 
            
Public Constructor Summary
Public Method Summary
| abstract Task<Void> | |
| synchronized static UserActions | |
| abstract Task<Void> | 
Inherited Method Summary
Constants
public static final String APP_INDEXING_API_TAG
The tag used for logging debug information for calls to UserActions
            class.
To enable logging:
            adb shell setprop log.tag.UserActions DEBUG
Public Constructors
public UserActions ()
Public Methods
public abstract Task<Void> end (Action action)
Logs that the user has stopped doing something in the app.
Use this method for a user action of some duration that has come to an end, like
            when the user has finished viewing an article or stopped listening to a song, as well
            as for instantaneous actions the user has taken, such as sending a message or adding a
            song to a playlist. For these instantaneous actions, don't call 
            start(Action) at all, but just 
            end(Action).
Parameters
| action | The Action
                describing either the instantaneous action the user has just taken, or the more
                long-lived activity the user has stopped doing in the app; for the latter
                
                start(Action) should be called before calling 
                end(Action). | 
              
|---|
Returns
- A 
Taskindicating the result of the operation. 
public static synchronized UserActions getInstance (Context context)
Returns an instance of UserActions.
This variant does not require Firebase initialization. Instead, the application
            context is inferred from the context that is explicitly passed in.
public abstract Task<Void> start (Action action)
Logs that the user has started doing something in the app.
Use this method for a user action of some duration, like viewing an article, or
            listening to a song. If the action is instantaneous, such as sending a message or
            adding a song to a playlist, then make a single call to 
            end(Action) instead.
Parameters
| action | The Action
                describing what the user has started doing in the app. | 
              
|---|
Returns
- A 
Taskindicating the result of the operation.