问题描述
我刚刚开始学习用于 Android 开发的 Kotlin，并启动了一个空项目并添加了一个活动.我已经添加了所需的 gradle 依赖项，如 Kotlin 文档中所述.默认情况下，MainActivity 的 xml 文件只包含一个 TextView.但是当我尝试在布局编辑器中预览 xml 时，它显示渲染错误"
I just started learning Kotlin for android development and started an empty project and added an activity. I have added the required gradle dependencies as said in Kotlin docs. By default the xml file of MainActivity contains only a TextView. But when I try to preview the xml in Layout Editor it shows a "Render Error"
Render problem
Failed to load AppCompat ActionBar with unknown error.
我也收到了
The following classes could not be instantiated:
- android.support.v7.widget.AppCompatImageView (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.ActionBarContainer (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.Toolbar (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.AppCompatTextView (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.ActionBarContextView (Open Class, Show Exception, Clear Cache)
- android.support.v7.app.WindowDecorActionBar (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.ActionBarOverlayLayout (Open Class, Show Exception, Clear Cache)
Exception Details java.lang.ClassNotFoundException: android.support.v4.view.TintableBackgroundView
我尝试过手动重建项目和刷新布局.但似乎没有任何效果.
I have tried rebuilding the project and refreshing layout manually. But nothing seems to work.
那我该怎么办?我正在使用带有 Kotlin 的 Android Studio 3.0 Canary 2
So what do I do? I'm using Android Studio 3.0 Canary 2 with Kotlin
已
我取得了一些进展.我发现我的 AppCompat 主题都不起作用.
I have made some progress. I have found that none of my AppCompat Themes are working.
推荐答案
好吧，检查你的 gradle ，你是否在 app/build.gradle 文件中添加了 support:appcompat 依赖项?还有 appcompat:design 依赖
Well, check your gradle , have you added support:appcompat dependency in app/build.gradle file ? also appcompat:design dependency
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