前言

Kotlin 中有很多內(nèi)置的擴(kuò)展函數(shù)翩瓜，非常好用跨扮，可以代替很多需要封裝的Java工具類，本文主在列舉一些發(fā)現(xiàn)的好用擴(kuò)展函數(shù)验毡；
本文也會(huì)不斷維護(hù)衡创，大佬們有新的擴(kuò)展函數(shù)，或者自己寫的感覺好用擴(kuò)展函數(shù)也可以加進(jìn)來晶通；

日志打印

internal const val DEBUG = true
internal const val TAG = "shuxin.wei"

fun Any?.logI(tag: String = TAG, debug: Boolean = true) {
    if (DEBUG && debug) {
        Log.i(tag, this.toString())
    }
}

fun Any?.logD(tag: String = TAG, debug: Boolean = true) {
    if (DEBUG && debug) {
        Log.d(tag, this.toString())
    }
}

fun Any?.logE(tag: String = TAG, debug: Boolean = true) {
    if (DEBUG && debug) {
        Log.e(tag, this.toString())
    }
}

fun Any?.logW(tag: String = TAG, debug: Boolean = true) {
    if (DEBUG && debug) {
        Log.w(tag, this.toString())
    }
}

fun Any?.logP(tag: String = TAG, debug: Boolean = true) {
    if (DEBUG && debug) {
        println("$tag : $this")
    }
}

fun printThread(tag: String = TAG) {
    "$tag: ThreadName:${Thread.currentThread().name} ThreadId: ${Thread.currentThread().id}".logD(tag)
}

異步

1. 簡(jiǎn)介

可以在Activity璃氢、Fragment、Context上下文中方便線程切換狮辽，以及處理了可能發(fā)生的內(nèi)存泄漏一也；
Boolean返回值表示是否執(zhí)行了傳入的函數(shù)巢寡；
將這段代碼粘貼到AS中就可以看見入?yún)⒑蜕舷挛模?br> 文件地址：https://github.com/Kotlin/anko

class CoroutinesActivity : AppCompatActivity() {
    val doAsync: Future<Unit> = "test".doAsync {
        val get: String? = this.weakRef.get()
        printThread(get ?: "test")
        "test"
    }
    val doAsyncResult: Future<String> = "test".doAsyncResult {
        val get: String? = this.weakRef.get()
        printThread(get ?: "")
        return@doAsyncResult "test"
    }
    val activityUiThread: Boolean = AnkoAsyncContext(WeakReference(this@CoroutinesActivity)).activityUiThread {
    }
    baseContext.runOnUiThread {
    }
    val uiThread: Boolean = AnkoAsyncContext(WeakReference("test")).uiThread {
    }
    val activityUiThreadWithContext: Boolean = AnkoAsyncContext(WeakReference(this@CoroutinesActivity)).activityUiThreadWithContext {
    }
    val ankoContext = AnkoContext.create(this@CoroutinesActivity, this@CoroutinesActivity)
    val activityUiThread1: Boolean = AnkoAsyncContext(WeakReference(ankoContext)).activityUiThread {
    }
    val activityUiThreadWithContext1: Boolean = AnkoAsyncContext(WeakReference(ankoContext)).activityUiThreadWithContext {
    }
    Fragment().runOnUiThread {
    }
    val supportFragmentUiThread:Boolean = AnkoAsyncContext(WeakReference(Fragment())).supportFragmentUiThread {
    }
}