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haohao

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Update README.md

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`@@ -669,6 +669,48 @@ view.setOnClickListener(object : OnClickListener{`
`669`	`669`	`}`
`670`	`670`	`})`
`671`	`671`
	`672`	+```
	`673`	`+---`
	`674`	`+### 扩展`
	`675`	`+Java`
	`676`	+```java
	`677`	`+// Java 类不能直接进行扩展`
	`678`	+```
	`679`	`+Kotlin`
	`680`	`+`
	`681`	+```kotlin
	`682`	`+// 一般扩展`
	`683`	`+class MyClass {`
	`684`	`+ fun foo() = println("member")`
	`685`	`+}`
	`686`	`+`
	`687`	`+fun MyClass.bar() = println("extension")`
	`688`	`+`
	`689`	`+MyClass().bar()`
	`690`	`+`
	`691`	`+//输出: extension`
	`692`	`+`
	`693`	+```
	`694`	`+`
	`695`	+```kotlin
	`696`	`+// 扩展函数与成员函数相同`
	`697`	`+class MyClass {`
	`698`	`+`
	`699`	`+ fun foo() = println("member")`
	`700`	`+}`
	`701`	`+`
	`702`	`+fun MyClass.foo() = println("extension") // 扩展函数与成员函数相同时, 成员函数优先`
	`703`	`+`
	`704`	`+fun MyClass.foo(para: Int) = println("extension")`
	`705`	`+`
	`706`	`+MyClass().foo()`
	`707`	`+`
	`708`	`+MyClass().foo(0)`
	`709`	`+`
	`710`	`+//输出:`
	`711`	`+// member`
	`712`	`+// extension`
	`713`	`+`
`672`	`714`	```
`673`	`715`	`---`
`674`	`716`	`## 持续更新中。。。`

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