由于google爸爸现在主要的中心都放在flutter上，对于Android 原生sdk包括kotlin的库的更新，都已经不再那么关住了。由此导致的其他库如：anko,在新的Androidstudio上已经是bug重重，没有入坑的同学，直接放弃anko的使用，用第三方kotlin库尤其注意。

bug1: anko layout,看下面代码

 class LoginUI : AnkoComponent<LoginActivity> {private val customStyle = { v: Any ->when (v) {is Button -> v.textSize = 26fis EditText -> v.textSize = 24f}}override fun createView(ui: AnkoContext<LoginActivity>) = with(ui) {verticalLayout {padding = dip(32)imageView(android.R.drawable.ic_menu_manage).lparams {margin = dip(16)gravity = Gravity.CENTER}val name = editText {hintResource = R.string.name}val password = editText {hintResource = R.string.passwordinputType = TYPE_CLASS_TEXT or TYPE_TEXT_VARIATION_PASSWORD}button("Log in") {onClick {ui.owner.tryLogin(ui, name.text, password.text)}}}.applyRecursively(customStyle)}
复制代码

java.lang.IllegalStateException: Module with the Main dispatcher had failed to initializeat kotlinx.coroutines.internal.MissingMainCoroutineDispatcher.missing(MainDispatchers.kt:79)at kotlinx.coroutines.internal.MissingMainCoroutineDispatcher.isDispatchNeeded(MainDispatchers.kt:54)at kotlinx.coroutines.DispatchedKt.resumeCancellable(Dispatched.kt:373)at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:25)at kotlinx.coroutines.CoroutineStart.invoke(CoroutineStart.kt:109)at kotlinx.coroutines.AbstractCoroutine.start(AbstractCoroutine.kt:160)at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch(Builders.common.kt:54)at kotlinx.coroutines.BuildersKt.launch(Unknown Source)at org.jetbrains.anko.sdk27.coroutines.Sdk27CoroutinesListenersWithCoroutinesKt$onClick$1.onClick(ListenersWithCoroutines.kt:299)at android.view.View.performClick(View.java:5265)at android.view.View$PerformClick.run(View.java:21534)at android.os.Handler.handleCallback(Handler.java:815)at android.os.Handler.dispatchMessage(Handler.java:104)at android.os.Looper.loop(Looper.java:207)at android.app.ActivityThread.main(ActivityThread.java:5728)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)Caused by: java.lang.AbstractMethodError: abstract method "java.lang.String kotlinx.coroutines.internal.MainDispatcherFactory.hintOnError()"at kotlinx.coroutines.internal.MainDispatchersKt.tryCreateDispatcher(MainDispatchers.kt:39)at kotlinx.coroutines.internal.MainDispatcherLoader.loadMainDispatcher(MainDispatchers.kt:18)at kotlinx.coroutines.internal.MainDispatcherLoader.<clinit>(MainDispatchers.kt:10)
复制代码

是否页面很简介。但是！！

你会发现onclick事件会导致程序崩溃。 接着添加依赖，尝试添加依赖会发现该资源地址404 implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.2.0-alpha'

当然如果你的Androidstudio 版本是“3.1.2“或之前。不会报错。

另外，如果你想兼容java库，协程是不适合的。比如retrofit为主的请求框架，不支持主线程调用，而协程的大都是在主线程，避免子线程的开销。所以你只能依赖fuel,然而fuel你也会发现，不完全掌握kotlin语法的话，简单的请求回调，fuel不会教你怎么做的。要自己去封装。