EventHandler

java.lang.Object
- ohos.eventhandler.EventHandler

直接已知子类:

DataAbilityAsyncHandler, EventHandlerEx, RdbStoreAsyncHandler
```
public class EventHandler
extends Object
```
Allows you to send and process InnerEvent and Runnable objects on asynchronous threads.
Each EventHandler instance is bound to a thread, and the thread has an event queue. The thread cyclically retrieves events from the event queue and dispatches the events to the EventHandler for processing. The EventHandler delivers an event or a Runnable task to the thread's event queue and executes the event or task when it comes out of the event queue.
You can use an EventHandler to dispatch and process events and Runnable objects among different threads and to schedule events or Runnable objects to be processed at a certain interval.
You can use methods provided in this class to send a synchronous or asynchronous event, delay the processing of an event, and set the event priority.
You need to override the processEvent(ohos.eventhandler.InnerEvent) method to process events.

从以下版本开始:

1

嵌套类概要

嵌套类
限定符和类型类说明

static class EventHandler.Priority
Defines the priority of an InnerEvent.

嵌套类
限定符和类型	类	说明
`static class`	`EventHandler.Priority`	Defines the priority of an `InnerEvent`.

构造器概要

构造器
构造器说明

EventHandler(EventRunner runner)
A constructor used to create an EventHandler instance and bind it to an EventRunner.

构造器
构造器	说明
`EventHandler(EventRunner runner)`	A constructor used to create an `EventHandler` instance and bind it to an `EventRunner`.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法	说明
`static EventHandler`	`current()`	Obtains the current event handler.
`void`	`distributeEvent(InnerEvent event)`	Distributes a specified `InnerEvent`.
`void`	`dump(Dumper dumper)`	Prints out the internal information about an object in the specified format, helping you diagnose internal errors of the object.
`String`	`getEventName(InnerEvent event)`	Obtains the name of a specified `InnerEvent`.
`EventRunner`	`getEventRunner()`	Obtains the `EventRunner` bound to the current `EventHandler`.
`boolean`	`hasInnerEvent(int eventId)`	Checks whether an event with the given ID can be found among the events that have been sent but not processed.
`boolean`	`hasInnerEvent(int eventId, Object object)`	Checks whether an event with the given ID and the specified `object` can be found among the events that have been sent but not processed.
`boolean`	`hasInnerEvent(long param)`	Checks whether an event carrying the given `param` can be found among the events that have been sent but not processed.
`boolean`	`hasInnerEvent(Object object)`	Checks whether an event carrying the given `object` can be found among the events that have been sent but not processed.
`boolean`	`hasInnerEvent(Runnable runnable)`	Checks whether the given `Runnable` task can be found among the events that have been sent but not processed.
`boolean`	`isIdle()`	Checks whether the current `EventHandler` is idle.
`void`	`postSyncTask(Runnable task)`	Sends a synchronous `Runnable` task to the event queue.
`void`	`postSyncTask(Runnable task, EventHandler.Priority priority)`	Sends a synchronous `Runnable` task with a specified priority to the event queue.
`void`	`postTask(Runnable task)`	Sends a `Runnable` task to the event queue.
`void`	`postTask(Runnable task, long delayTime)`	Sends a delayed `Runnable` task to the event queue.
`void`	`postTask(Runnable task, long delayTime, EventHandler.Priority priority)`	Sends a delayed `Runnable` task with a specified priority to the event queue.
`void`	`postTask(Runnable task, Object object)`	Sends a `Runnable` task that carries the specified `object` to the event queue.
`void`	`postTask(Runnable task, EventHandler.Priority priority)`	Sends a `Runnable` task with a specified priority to the event queue.
`void`	`postTimingTask(Runnable task, long taskTime)`	Sends a scheduled `Runnable` task with the default priority `EventHandler.Priority#LOW` to the event queue.
`void`	`postTimingTask(Runnable task, long taskTime, EventHandler.Priority priority)`	Sends a scheduled `Runnable` task with a specified priority to the event queue.
`void`	`postTimingTask(Runnable task, Object obj, long taskTime)`	Sends a scheduled `Runnable` task that carries the specified `object` to the event queue.
`protected void`	`processEvent(InnerEvent event)`	Called for processing events.
`void`	`removeAllEvent()`	Removes all waiting events from the `EventHandler`.
`void`	`removeEvent(int eventId)`	Removes specified waiting events from the `EventHandler` based on the given event ID.
`void`	`removeEvent(int eventId, long param)`	Removes specified waiting events from the `EventHandler` based on the given event ID and `param`.
`void`	`removeEvent(int eventId, long param, Object object)`	Removes specified waiting events from the `EventHandler` based on the given event ID, `param`, and `object`.
`void`	`removeEvent(int eventId, Object object)`	Removes specified waiting events from the `EventHandler` based on the given event ID and `object`.
`void`	`removeTask(Runnable task)`	Removes the given `Runnable` task from the events that have been sent but not processed.
`void`	`removeTask(Runnable task, Object object)`	Removes the given `Runnable` task that carries the specified `object` from the events that have been sent but not processed.
`void`	`sendEvent(int eventId)`	Sends an empty event (containing only the event ID) to the event queue.
`void`	`sendEvent(int eventId, long delayTime)`	Sends a delayed empty event (containing only the event ID) to the event queue.
`void`	`sendEvent(int eventId, long delayTime, EventHandler.Priority priority)`	Sends a delayed empty event (containing only the event ID) with a specified priority to the event queue.
`void`	`sendEvent(int eventId, EventHandler.Priority priority)`	Sends an empty event (containing only the event ID) with a specified priority to the event queue.
`void`	`sendEvent(InnerEvent event)`	Sends an event to the event queue.
`void`	`sendEvent(InnerEvent event, long delayTime)`	Sends a delayed event to the event queue.
`void`	`sendEvent(InnerEvent event, long delayTime, EventHandler.Priority priority)`	Sends a delayed event with a specified priority to the event queue.
`void`	`sendEvent(InnerEvent event, EventHandler.Priority priority)`	Sends an event with a specified priority to the event queue.
`void`	`sendSyncEvent(int eventId)`	Sends an empty synchronous event (containing only the event ID) to the event queue.
`void`	`sendSyncEvent(int eventId, EventHandler.Priority priority)`	Sends an empty synchronous event (containing only the event ID) with a specified priority to the event queue.
`void`	`sendSyncEvent(InnerEvent event)`	Sends a synchronous event to the event queue.
`void`	`sendSyncEvent(InnerEvent event, EventHandler.Priority priority)`	Sends a synchronous event with a specified priority to the event queue.
`void`	`sendTimingEvent(int eventId, long taskTime)`	Sends a scheduled event containing only the event ID to the event queue.
`void`	`sendTimingEvent(int eventId, long taskTime, EventHandler.Priority priority)`	Sends a scheduled event containing only the event ID with a specified priority to the event queue.
`void`	`sendTimingEvent(InnerEvent event, long taskTime)`	Sends a scheduled event with the default priority `EventHandler.Priority#LOW` to the event queue.
`void`	`sendTimingEvent(InnerEvent event, long taskTime, EventHandler.Priority priority)`	Sends a scheduled event with a specified priority to the event queue.
`String`	`toString()`	Returns a string representation of the object.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 构造器详细资料
  - EventHandler
```
public EventHandler(EventRunner runner)
             throws IllegalArgumentException
```
    A constructor used to create an EventHandler instance and bind it to an EventRunner.
    
    参数:
    
    runner - Indicates the EventRunner instance running the EventHandler.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the given EventRunner is invalid.
    
    从以下版本开始:
    
    1
- 方法详细资料
  - current
```
public static EventHandler current()
```
    Obtains the current event handler.
    
    返回:
    
    Returns the current EventHandler instance.
  - sendEvent
```
public void sendEvent(InnerEvent event,
                      long delayTime,
                      EventHandler.Priority priority)
               throws IllegalArgumentException
```
    Sends a delayed event with a specified priority to the event queue.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    delayTime - Indicates the time period after which the event will be processed, in milliseconds. The value must be greater than 0. Otherwise, the event will not be delayed.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null or the InnerEvent instance indicated by event has been sent by another EventHandler.
    
    从以下版本开始:
    
    1
  - sendEvent
```
public void sendEvent(InnerEvent event)
               throws IllegalArgumentException
```
    Sends an event to the event queue.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null or the InnerEvent instance indicated by event has been sent by another EventHandler.
    
    从以下版本开始:
    
    1
  - sendEvent
```
public void sendEvent(InnerEvent event,
                      long delayTime)
               throws IllegalArgumentException
```
    Sends a delayed event to the event queue.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    delayTime - Indicates the time period after which the event will be processed, in milliseconds. The value must be greater than 0. Otherwise, the event will not be delayed.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null or the InnerEvent instance indicated by event has been sent by another EventHandler.
    
    从以下版本开始:
    
    1
  - sendEvent
```
public void sendEvent(InnerEvent event,
                      EventHandler.Priority priority)
               throws IllegalArgumentException
```
    Sends an event with a specified priority to the event queue.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null or the InnerEvent instance indicated by event has been sent by another EventHandler.
    
    从以下版本开始:
    
    1
  - sendEvent
```
public void sendEvent(int eventId)
               throws IllegalArgumentException
```
    Sends an empty event (containing only the event ID) to the event queue.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent.
    
    从以下版本开始:
    
    1
  - sendEvent
```
public void sendEvent(int eventId,
                      long delayTime)
               throws IllegalArgumentException
```
    Sends a delayed empty event (containing only the event ID) to the event queue.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    delayTime - Indicates the time period after which the event will be processed, in milliseconds. The value must be greater than 0. Otherwise, the event will not be delayed.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent.
    
    从以下版本开始:
    
    1
  - sendEvent
```
public void sendEvent(int eventId,
                      EventHandler.Priority priority)
               throws IllegalArgumentException
```
    Sends an empty event (containing only the event ID) with a specified priority to the event queue.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent.
    
    从以下版本开始:
    
    1
  - sendEvent
```
public void sendEvent(int eventId,
                      long delayTime,
                      EventHandler.Priority priority)
               throws IllegalArgumentException
```
    Sends a delayed empty event (containing only the event ID) with a specified priority to the event queue.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    delayTime - Indicates the time period after which the event will be processed, in milliseconds. The value must be greater than 0. Otherwise, the event will not be delayed.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent.
    
    从以下版本开始:
    
    1
  - postTask
```
public void postTask(Runnable task,
                     long delayTime,
                     EventHandler.Priority priority)
              throws IllegalArgumentException
```
    Sends a delayed Runnable task with a specified priority to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    delayTime - Indicates the time period after which the task will be processed, in milliseconds. The value must be greater than 0. Otherwise, the event will not be delayed.
    
    priority - Indicates the task priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    1
  - postTask
```
public void postTask(Runnable task)
              throws IllegalArgumentException
```
    Sends a Runnable task to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    1
  - postTask
```
public void postTask(Runnable task,
                     long delayTime)
              throws IllegalArgumentException
```
    Sends a delayed Runnable task to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    delayTime - Indicates the time period after which the task will be processed, in milliseconds. The value must be greater than 0. Otherwise, the task will not be delayed.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    1
  - postTask
```
public void postTask(Runnable task,
                     EventHandler.Priority priority)
              throws IllegalArgumentException
```
    Sends a Runnable task with a specified priority to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    priority - Indicates the task priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    1
  - sendSyncEvent
```
public void sendSyncEvent(InnerEvent event,
                          EventHandler.Priority priority)
                   throws IllegalArgumentException
```
    Sends a synchronous event with a specified priority to the event queue. This thread is blocked until the event is processed.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null, the InnerEvent instance indicated by event has been sent by another EventHandler, or priority is EventHandler.Priority#IDLE.
    
    从以下版本开始:
    
    1
  - sendSyncEvent
```
public void sendSyncEvent(InnerEvent event)
                   throws IllegalArgumentException
```
    Sends a synchronous event to the event queue. This thread is blocked until the event is processed.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null or the InnerEvent instance indicated by event has been sent by another EventHandler.
    
    从以下版本开始:
    
    1
  - sendSyncEvent
```
public void sendSyncEvent(int eventId,
                          EventHandler.Priority priority)
                   throws IllegalArgumentException
```
    Sends an empty synchronous event (containing only the event ID) with a specified priority to the event queue. This thread is blocked until the event is processed.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent or if priority is EventHandler.Priority#IDLE.
    
    从以下版本开始:
    
    1
  - sendSyncEvent
```
public void sendSyncEvent(int eventId)
                   throws IllegalArgumentException
```
    Sends an empty synchronous event (containing only the event ID) to the event queue. This thread is blocked until the event is processed.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent.
    
    从以下版本开始:
    
    1
  - postSyncTask
```
public void postSyncTask(Runnable task,
                         EventHandler.Priority priority)
                  throws IllegalArgumentException
```
    Sends a synchronous Runnable task with a specified priority to the event queue. This thread is blocked until the task is executed.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    priority - Indicates the task priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null or priority is EventHandler.Priority#IDLE.
    
    从以下版本开始:
    
    1
  - postSyncTask
```
public void postSyncTask(Runnable task)
                  throws IllegalArgumentException
```
    Sends a synchronous Runnable task to the event queue. This thread is blocked until the task is executed.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    1
  - postTask
```
public void postTask(Runnable task,
                     Object object)
              throws IllegalArgumentException
```
    Sends a Runnable task that carries the specified object to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    object - Indicates the object carried in the task. This parameter can be null.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null or the task has been sent by another EventHandler.
    
    从以下版本开始:
    
    4
  - sendTimingEvent
```
public void sendTimingEvent(InnerEvent event,
                            long taskTime,
                            EventHandler.Priority priority)
                     throws IllegalArgumentException
```
    Sends a scheduled event with a specified priority to the event queue.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    taskTime - Indicates the scheduled time to trigger the event, in ms. The value must be greater than the current system runtime. Otherwise, the event will be triggered immediately.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null or the InnerEvent instance indicated by event has been sent by another EventHandler.
    
    从以下版本开始:
    
    3
  - sendTimingEvent
```
public void sendTimingEvent(InnerEvent event,
                            long taskTime)
                     throws IllegalArgumentException
```
    Sends a scheduled event with the default priority EventHandler.Priority#LOW to the event queue.
    
    参数:
    
    event - Indicates the InnerEvent to send.
    
    taskTime - Indicates the scheduled time to trigger the event, in ms. The value must be greater than the current system runtime. Otherwise, the event will be triggered immediately.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if event is null or the InnerEvent instance indicated by event has been sent by another EventHandler.
    
    从以下版本开始:
    
    3
  - sendTimingEvent
```
public void sendTimingEvent(int eventId,
                            long taskTime)
                     throws IllegalArgumentException
```
    Sends a scheduled event containing only the event ID to the event queue. The default priority is EventHandler.Priority#LOW.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    taskTime - Indicates the scheduled time to trigger the event, in ms. The value must be greater than the current system runtime. Otherwise, the event will be triggered immediately.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent.
    
    从以下版本开始:
    
    3
  - sendTimingEvent
```
public void sendTimingEvent(int eventId,
                            long taskTime,
                            EventHandler.Priority priority)
                     throws IllegalArgumentException
```
    Sends a scheduled event containing only the event ID with a specified priority to the event queue. The default priority is EventHandler.Priority#LOW.
    
    参数:
    
    eventId - Indicates the ID of the event to send. You can set it to any int value.
    
    taskTime - Indicates the scheduled time to trigger the event, in ms. The value must be greater than the current system runtime. Otherwise, the event will be triggered immediately.
    
    priority - Indicates the event priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if the system fails to use eventId to create an InnerEvent.
    
    从以下版本开始:
    
    3
  - postTimingTask
```
public void postTimingTask(Runnable task,
                           long taskTime,
                           EventHandler.Priority priority)
                    throws IllegalArgumentException
```
    Sends a scheduled Runnable task with a specified priority to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    taskTime - Indicates the scheduled time to trigger the task, in ms. The value must be greater than the current system runtime. Otherwise, the task will be triggered immediately.
    
    priority - Indicates the task priority. For details, see EventHandler.Priority.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    3
  - postTimingTask
```
public void postTimingTask(Runnable task,
                           Object obj,
                           long taskTime)
                    throws IllegalArgumentException
```
    Sends a scheduled Runnable task that carries the specified object to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send. This parameter cannot be null.
    
    obj - Indicates the object carried in the task. This parameter can be null.
    
    taskTime - Indicates the scheduled time to trigger the task, in ms. The value must be greater than the current system runtime. Otherwise, the task will be triggered immediately.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    4
  - postTimingTask
```
public void postTimingTask(Runnable task,
                           long taskTime)
                    throws IllegalArgumentException
```
    Sends a scheduled Runnable task with the default priority EventHandler.Priority#LOW to the event queue.
    
    参数:
    
    task - Indicates the Runnable task to send.
    
    taskTime - Indicates the scheduled time to trigger the task, in ms. The value must be greater than the current system runtime. Otherwise, the task will be triggered immediately.
    
    抛出:
    
    IllegalArgumentException - Throws this exception if an input parameter is invalid, for example, if task is null.
    
    从以下版本开始:
    
    3
  - removeAllEvent
```
public void removeAllEvent()
```
    Removes all waiting events from the EventHandler.
    Waiting events are events that have been sent to the event queue but have not been processed.
    
    从以下版本开始:
    
    1
  - removeEvent
```
public void removeEvent(int eventId)
```
    Removes specified waiting events from the EventHandler based on the given event ID.
    Waiting events are events that have been sent to the event queue but have not been processed.
    
    参数:
    
    eventId - Indicates the event ID. All events with this ID will be removed.
    
    从以下版本开始:
    
    1
  - removeEvent
```
public void removeEvent(int eventId,
                        long param)
```
    Removes specified waiting events from the EventHandler based on the given event ID and param.
    Waiting events are events that have been sent to the event queue but have not been processed.
    
    参数:
    
    eventId - Indicates the event ID.
    
    param - Indicates the parameter carried in the event.
    
    从以下版本开始:
    
    1
  - removeEvent
```
public void removeEvent(int eventId,
                        Object object)
```
    Removes specified waiting events from the EventHandler based on the given event ID and object.
    Waiting events are events that have been sent to the event queue but have not been processed.
    
    参数:
    
    eventId - Indicates the event ID.
    
    object - Indicates the object carried in the event.
    
    从以下版本开始:
    
    1
  - removeEvent
```
public void removeEvent(int eventId,
                        long param,
                        Object object)
```
    Removes specified waiting events from the EventHandler based on the given event ID, param, and object.
    Waiting events are events that have been sent to the event queue but have not been processed.
    
    参数:
    
    eventId - Indicates the event ID.
    
    param - Indicates the parameter carried in the event.
    
    object - Indicates the object carried in the event.
    
    从以下版本开始:
    
    1
  - removeTask
```
public void removeTask(Runnable task)
```
    Removes the given Runnable task from the events that have been sent but not processed.
    
    参数:
    
    task - Indicates the Runnable task to remove.
    
    从以下版本开始:
    
    3
  - removeTask
```
public void removeTask(Runnable task,
                       Object object)
```
    Removes the given Runnable task that carries the specified object from the events that have been sent but not processed.
    
    参数:
    
    task - Indicates the Runnable task to remove.
    
    object - Indicates the object carried in the task. This parameter can be null.
    
    从以下版本开始:
    
    4
  - getEventRunner
```
public final EventRunner getEventRunner()
```
    Obtains the EventRunner bound to the current EventHandler.
    Each EventHandler must be bound to an EventRunner after being created.
    
    返回:
    
    Returns the EventRunner bound to the current EventHandler object.
    
    从以下版本开始:
    
    1
  - isIdle
```
public final boolean isIdle()
```
    Checks whether the current EventHandler is idle.
    
    返回:
    
    Returns true if all events have been processed; returns false otherwise.
    
    从以下版本开始:
    
    3
  - hasInnerEvent
```
public final boolean hasInnerEvent(Runnable runnable)
```
    Checks whether the given Runnable task can be found among the events that have been sent but not processed.
    
    参数:
    
    runnable - Indicates the Runnable task to find.
    
    返回:
    
    Returns true if the given Runnable task is found; returns false otherwise.
    
    从以下版本开始:
    
    3
  - hasInnerEvent
```
public final boolean hasInnerEvent(long param)
```
    Checks whether an event carrying the given param can be found among the events that have been sent but not processed.
    
    参数:
    
    param - Indicates the long integer parameter carried in the event.
    
    返回:
    
    Returns true if the event carrying the given param is found; returns false otherwise.
    
    从以下版本开始:
    
    3
  - hasInnerEvent
```
public final boolean hasInnerEvent(Object object)
```
    Checks whether an event carrying the given object can be found among the events that have been sent but not processed.
    
    参数:
    
    object - Indicates the object carried in the event.
    
    返回:
    
    Returns true if the event carrying the given object is found; returns false otherwise.
    
    从以下版本开始:
    
    3
  - hasInnerEvent
```
public final boolean hasInnerEvent(int eventId)
```
    Checks whether an event with the given ID can be found among the events that have been sent but not processed.
    
    参数:
    
    eventId - Indicates the ID of the event to find.
    
    返回:
    
    Returns true if the event with the given ID can be found; returns false otherwise.
    
    从以下版本开始:
    
    3
  - hasInnerEvent
```
public final boolean hasInnerEvent(int eventId,
                                   Object object)
```
    Checks whether an event with the given ID and the specified object can be found among the events that have been sent but not processed.
    
    参数:
    
    eventId - Indicates the ID of the event to find.
    
    object - Indicates the object carried in the event. This parameter can be null.
    
    返回:
    
    Returns true if the event with the given ID and the specified object is found; returns false otherwise.
    
    从以下版本开始:
    
    3
  - dump
```
public final void dump(Dumper dumper)
```
    Prints out the internal information about an object in the specified format, helping you diagnose internal errors of the object.
    
    参数:
    
    dumper - Indicates the Dumper object you have implemented to process the output internal information.
    
    从以下版本开始:
    
    4
  - getEventName
```
public String getEventName(InnerEvent event)
```
    Obtains the name of a specified InnerEvent.
    
    参数:
    
    event - Indicates the InnerEvent whose name is to be obtained.
    
    返回:
    
    Returns the task name if the given event contains a specific task; returns the event ID otherwise.
    
    从以下版本开始:
    
    3
  - distributeEvent
```
public void distributeEvent(InnerEvent event)
```
    Distributes a specified InnerEvent.
    If the InnerEvent carries a task, that is, its task attribute is not null, the task will be executed.
    If the InnerEvent does not carry any task, processEvent(ohos.eventhandler.InnerEvent) will be called to process the event.
    
    参数:
    
    event - Indicates the InnerEvent to distribute.
    
    从以下版本开始:
    
    4
  - processEvent
```
protected void processEvent(InnerEvent event)
```
    Called for processing events.
    You should override this method to process events sent by the EventHandler.
    
    参数:
    
    event - Indicates the InnerEvent to process.
    
    从以下版本开始:
    
    1
  - toString
```
public String toString()
```
    从类复制的说明: Object
    Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.
    The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:
    getClass().getName() + '@' + Integer.toHexString(hashCode())
    覆盖:
    
    toString 在类中 Object
    
    返回:
    
    a string representation of the object.

类 EventHandler

嵌套类概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

EventHandler

方法详细资料

current

sendEvent

sendEvent

sendEvent

sendEvent

sendEvent

sendEvent

sendEvent

sendEvent

postTask

postTask

postTask

postTask

sendSyncEvent

sendSyncEvent

sendSyncEvent

sendSyncEvent

postSyncTask

postSyncTask

postTask

sendTimingEvent

sendTimingEvent

sendTimingEvent

sendTimingEvent

postTimingTask

postTimingTask

postTimingTask

removeAllEvent

removeEvent

removeEvent

removeEvent

removeEvent

removeTask

removeTask

getEventRunner

isIdle

hasInnerEvent

hasInnerEvent

hasInnerEvent

hasInnerEvent

hasInnerEvent

dump

getEventName

distributeEvent

processEvent

toString