add Java API

mirai-console/src/main/java/net/mamoe/mirai/console/events/EventListener.java

@@ -14,7 +14,7 @@ public class EventListener {
 
     PluginBase base;
 
-    protected EventListener(
+    public EventListener(
             PluginBase base
     ){
         this.base = base;

mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugins/PluginBase.kt

@@ -15,6 +15,7 @@ import kotlinx.coroutines.*
 import net.mamoe.mirai.console.MiraiConsole
 import net.mamoe.mirai.console.command.Command
 import net.mamoe.mirai.console.command.CommandSender
+import net.mamoe.mirai.console.events.EventListener
 import net.mamoe.mirai.console.scheduler.PluginScheduler
 import net.mamoe.mirai.console.scheduler.SchedulerTaskManagerInstance
 import net.mamoe.mirai.utils.MiraiLogger
@@ -138,6 +139,14 @@ abstract class PluginBase
         return scheduler!!
     }
 
+    private var eventListener:EventListener? = null
+    fun getEventListener():EventListener{
+        if(eventListener == null){
+            eventListener = EventListener(this)
+        }
+        return eventListener!!
+    }
+
 }
 
 /**

mirai-console/src/main/kotlin/net/mamoe/mirai/console/scheduler/SchedulerTask.kt

@@ -100,9 +100,22 @@ class PluginScheduler(_coroutineContext: CoroutineContext) :CoroutineScope{
             }
         )
     }
+
+    /**
+     * 异步执行一个任务, 没有返回
+     */
+    fun async(runnable: Runnable){
+        this.launch {
+            withContext(Dispatchers.IO){
+                runnable.run()
+            }
+        }
+    }
+
 }
 
 
+
 /**
  * 这个类作为java与kotlin的桥接
  * 用java的interface进行了kotlin的实现