anko 一个已经被抛弃的孩子

比眉伴天荒 2022-10-01 09:54 23阅读 0赞

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 = 26f
                    is 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.password
                        inputType = 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 initialize
            at 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。

转载于:https://juejin.im/post/5ca475df6fb9a05e7207ec4e