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>