InputView获取自定义属性报错

[SwordSware]

你好，
InputView 中的第61行：context.obtainStyledAttributes(attrs, R.styleable.inputView);
运行时报错奔溃

编译环境:Android Studio 3.6 Canary 4
Build #AI-191.7479.19.36.5679705, built on June 22, 2019
JRE: 1.8.0_202-release-1483-b03 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0

gradle: gradle-5.4.1-all.zip、 com.android.tools.build:gradle:3.6.0-alpha04

运行环境：1、小米9 miui 10.2.31 android 9 2、模拟器Nexus 5X API 28 android 9.0 x86_64

报错详细信息：Caused by: java.lang.ClassNotFoundException: Didn't find class "com.sunday.imoocmusicdemo.R$styleable" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.sunday.imoocmusicdemo-ElUC4uDW_VkFE178gGEFXw==/base.apk"],nativeLibraryDirectories=[/data/app/com.sunday.imoocmusicdemo-ElUC4uDW_VkFE178gGEFXw==/lib/x86_64, /data/app/com.sunday.imoocmusicdemo-ElUC4uDW_VkFE178gGEFXw==/base.apk!/lib/x86_64, /system/lib64]]

麻烦看一下哈