Looper.Observer

Enclosing class:: Looper

public static interface Looper.Observer

Method Summary

Modifier and Type

Method

Description

void

dispatchingThrewException(Object token, Message msg, Exception exception)

Called when an exception was thrown while processing a message.

void

messageDispatched(Object token, Message msg)

Called when a message was processed by a Handler.

Object

messageDispatchStarting()

Called right before a message is dispatched.

Method Details
- messageDispatchStarting
  
  Object messageDispatchStarting()
  
  Called right before a message is dispatched.
  The token type is not specified to allow the implementation to specify its own type. The token must be passed back exactly once to either messageDispatched(java.lang.Object, icyllis.modernui.core.Message) or dispatchingThrewException(java.lang.Object, icyllis.modernui.core.Message, java.lang.Exception) and must not be reused again.
  
  Returns:
  
  a token used for collecting telemetry when dispatching a single message.
- messageDispatched
  
  void messageDispatched(Object token, Message msg)
  
  Called when a message was processed by a Handler.
  
  Parameters:
  
  token - Token obtained by previously calling messageDispatchStarting() on the same Observer instance.
  
  msg - The message that was dispatched.
- dispatchingThrewException
  
  void dispatchingThrewException(Object token, Message msg, Exception exception)
  
  Called when an exception was thrown while processing a message.
  
  Parameters:
  
  token - Token obtained by previously calling messageDispatchStarting() on the same Observer instance.
  
  msg - The message that was dispatched and caused an exception.
  
  exception - The exception that was thrown.