开发小Tips

Kotlin语言篇：

1、抽象类的定义

 abstract class Person(var name : String, var age : Int) : Any() {

     abstract var addr : String
     abstract val weight : Float

     abstract fun doSwim()

     fun doFly() {
         println("doFly")
     }

     fun doEach() {
         println("doEach")
     }
 }

2、去掉标题栏

     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.AppCompat.Light.NoActionBar">
         <activity android:name=".activity.SplashActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     </application>