错误：执行任务失败：app：compileDebugKotlinAfterJava'

Information:Gradle tasks [:app:assembleDebug] /Users/liwei/Desktop/Schedule/app/src/main/java/com/schedule/MainActivity.kt Error:(5, 16) Unresolved reference: os Error:(12, 8) Unresolved reference: java Error:(13, 8) Unresolved reference: java Error:(21, 5) 'onCreate' overrides nothing Error:(21, 47) Unresolved reference: Bundle Error:(27, 26) Unresolved reference: SimpleDateFormat Error:(28, 20) Unresolved reference: Date Error:(28, 25) Unresolved reference: System Error:(31, 19) Unresolved reference: Calendar Error:(35, 41) Unresolved reference: Calendar Error:(46, 47) Type mismatch: inferred type is MainActivity but Context was expected Error:(49, 25) Type mismatch: inferred type is kotlin.String but java.lang.String was expected Error:(50, 24) The integer literal does not conform to the expected type Object Error:(52, 45) Type mismatch: inferred type is MainActivity but Context was expected Error:(55, 25) Type mismatch: inferred type is kotlin.String but java.lang.String was expected Error:(56, 24) The integer literal does not conform to the expected type Object Error:(58, 45) Type mismatch: inferred type is MainActivity but Context was expected Error:(61, 25) Type mismatch: inferred type is kotlin.String but java.lang.String was expected Error:(62, 24) The integer literal does not conform to the expected type Object Error:(64, 44) Type mismatch: inferred type is MainActivity but Context was expected Error:(67, 25) Type mismatch: inferred type is kotlin.String but java.lang.String was expected Error:(68, 24) The integer literal does not conform to the expected type Object Error:(70, 37) Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: public val [ERROR : ].tab: PagerBottomTabLayout! defined in kotlinx.android.synthetic.main.activity_main Error:(84, 5) Class 'OnTabItemlistener' must be declared abstract or implement abstract member public abstract fun onSelected(p0: Int, p1: Object!): Unit defined in me.majiajie.pagerbottomtabstrip.listener.OnTabItemSelectListener Error:(85, 9) 'onSelected' overrides nothing Error:(86, 19) Unresolved reference: UnsupportedOperationException Error:(89, 9) 'onRepeatClick' overrides nothing Error:(90, 19) Unresolved reference: UnsupportedOperationException Error:Execution failed for task ':app:compileDebugKotlinAfterJava'. 

编译错误。 查看日志以获取更多信息信息：BUILD FAILED信息：总时间：8.812秒信息：29个错误信息：0个警告信息：查看控制台中的完整输出

Kotlin错误我不下来总是出现这种类型的问题请帮助谢谢

Answer 1

首先，请检查您是否已经完成了以下文章中描述的所有步骤： https ： //kotlinlang.org/docs/tutorials/kotlin-android.html

然后检查你正在使用哪个kotlin-plugin 。 希望你没有使用1.0.4版本，你选择了Stable通道进行kotlin更新，如果不是，请降级并重建项目。

有一些已知的问题与数据绑定库处理Kotlin。 请尽可能删除所有依赖项，并使用kotlin-extensions库重写绑定代码。 相信我，当你使用代码时，你不需要这个库。

然后选择File -> Invalidate Caches ，无效后重新启动android studio，清理并重建您的项目。

希望它会有所帮助