Anko之Anko Commons（二）

承接上一部分的anko layout,元旦事後，給你們來一波知識,恢復一下coding...;上一部分地址anko_layout.

文原本源 英文連接 Anko Commons is a "toolbox" for Kotlin Android developer. The library contains a lot of helpers for Android SDK, including, but not limited to:

• Intents (wiki);
• Dialogs and toasts (wiki);
• Logging (wiki);
• Resources and dimensions (wiki).

anko Commons做爲Android Kotlin發展的一個工具盒，這個依賴包在Android SDK中包含了許多好處

Intents(用於頁面跳轉的意圖)

1. 加入須要的依賴
 dependencies {
            compile "org.jetbrains.anko:anko-commons:版本號"
        }
2.  之前原生Kotlin的寫法
 val intent = Intent(this, SomeOtherActivity::class.java)
    intent.putExtra("id", 5)
    intent.setFlag(Intent.FLAG_ACTIVITY_SINGLE_TOP)
    startActivity(intent)
3. 如今的簡寫
   startActivity(intentFor<SomeOtherActivity>("id" to 5).singleTop())
   若是參數少，還能夠更簡單的寫：
     startActivity<SomeOtherActivity>("id" to 5)
4. Useful Intent callers
    Anko has call wrappers for some widely used Intents:
    Goal	          Solution
    Make a call	        makeCall(number) without tel:
    Send a text	        sendSMS(number, [text]) without sms:
    Browse the web	browse(url)
    Share some text	share(text, [subject])
    Send a email	email(email, [subject], [text])
    Arguments in square brackets ([]) are optional. Methods return true if the intent was send.
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Dialogs and toasts

>1. 第一步一樣導入依賴
  dependencies {
        compile "org.jetbrains.anko:anko-commons:$anko_version"
         compile "org.jetbrains.anko:anko-design:$anko_version" // For SnackBars
}
2. Toast簡寫,更加方便簡潔
    toast("直接填寫須要的內容")//默認是短按彈出Toast
    toast(R.string.message)//也可使用資源文件中的文本內容
    longToast("長按彈出提示內容")
3. SnackBars的使用（android 5.0仍是6.0的一個新的屬性，相似Toast效果，可是更增強大的顯示）必須引入材料設計的依賴：
     compile 'com.android.support:design:sdk版本號'
    //view 表明是在哪一個控件之下顯示。
    snackbar(view, "Hi there!")
    snackbar(view, R.string.message)
    longSnackbar(view, "Wow, such duration")
    snackbar(view, "Action, reaction", "Click me!") { doStuff() }
4. A small DSL for showing alert dialogs(對話框)
    alert ("標題(title)）", "內容(content)"){
             yesButton {}//肯定按鈕
             noButton {}//取消按鈕
         }.show()//系統默認的
5. 自定義的對話框，包括自定義title
     alert {
             customView {
                 editText()
             }
             customTitle { 
             }
         }.show()
6. Progress dialog(進度條的對話框)
    val dialogPress = ProgressDialog(activity)
7. Selectors(多條目的點擊事件彈出框)
    val countries = listOf("Russia", "USA", "Japan", "Australia")
        selector("Where are you from?", countries, { dialogInterface, i ->
             toast("So you're living in ${countries[i]}, right?")
    })
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Logging

日誌打印anko使用的是 AnkoLogger

必需要繼承 AnkoLogger
    info("London is the capital of Great Britain")
    debug(5) // .toString() method will be executed
    warn(null) // "null" will be printed
 也能夠這樣寫
     private val log = AnkoLogger<當前Activity>(this)
     private val logWithASpecificTag = AnkoLogger("my_tag")//設置特別的標誌
     private fun someMethod() {
        log.warning("Big brother is watching you!")
     }
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Resources and dimensions

資源文件

• 對於此部分到此結束！！！
• 《Anko之Anko SQLite(三)》敬請期待...
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• 若是有讚揚固然就更好了，是給個人確定和前進的動力。