Flywith24 · February 27, 2020 05:26 · Feb 27, 2020
diff --git a/Event.kt b/Event.kt
@@ -0,0 +1,32 @@
+package com.whdx.library_login.bean
+
+/**
+ * @author yyz (杨云召)
+ * @date   2020/2/27
+ * time   11:34
+ * description
+ * Used as a wrapper for data that is exposed via a LiveData that represents an event.
+ */
+
+open class Event<out T>(private val content: T) {
+
+    var hasBeenHandled = false
+        private set // Allow external read but not write
+
+    /**
+     * Returns the content and prevents its use again.
+     */
+    fun getContentIfNotHandled(): T? {
+        return if (hasBeenHandled) {
+            null
+        } else {
+            hasBeenHandled = true
+            content
+        }
+    }
+
+    /**
+     * Returns the content, even if it's already been handled.
+     */
+    fun peekContent(): T = content
+}