无法在当前主题中找到样式'coordinatorLayoutStyle'在Android Studio 3.1中

Question

Android Studio 3.1布局预览无法在当前主题中找到样式"coordinatorLayoutStyle".

Failed to instantiated one or more classes.
 Exception shown are :-
java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener

Answer 1

这是因为使用了alpha版SDK 28

我们需要改变android { ... }的"的build.gradle"在应用程序文件
compileSdkVersion 28,以compileSdkVersion 27
targetSdkVersion 28对targetSdkVersion 27

此外,尝试更改类似的
implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'实现
implementation 'com.android.support:appcompat-v7:27.1.1'

希望这个有效!

对于Android Studio v3.1.*,我们还需要更改:
implementation 'com.android.support:design:28.0.0-alpha3'to
implementation 'com.android.support:design:27.1.1'

Answer 2

您可以通过build.gradle在此android部分中将此脚本添加到应用程序模块来解决此问题

configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
    def requested = details.requested
    if (requested.group == "com.android.support") {
        if (!requested.name.startsWith("multidex")) {
            details.useVersion "27.+"
        }
     }
   }
}

Answer 3

转到 app/res/styles 并更改 Base.Theme.AppCompat.Light.DarkActionBar 的 Theme.AppCompat.Light.DarkActionBar