Google Play预启动报告报错：无法实例化BlankActivity

以下是几个可能的原因：

• Google Play测试框架自身问题
  预启动报告由Google Play内部测试工具（如Helium/UTP）生成，这个异常大概率是测试框架的组件加载失败导致的，和你的应用代码完全无关。测试工具在运行时会尝试初始化自身的BlankActivity，但可能因工具版本、环境配置问题出现类找不到的错误。

• 代码收缩工具的误配置
  如果你使用了ProGuard/R8，检查是否在混淆规则中意外添加了com.google.testing.*的保留规则，或者反向混淆映射文件出现错误。不过这种情况概率较低，毕竟你的项目根本没有引入该依赖。

• 测试环境兼容性问题
  预启动测试使用的设备/模拟器系统版本可能和测试工具存在兼容性冲突，导致Dex加载机制无法找到测试工具APK中的类。

• Google Play服务临时故障
  偶尔Google Play的测试服务会出现异常，生成错误的报告。这种情况可以尝试重新上传应用版本，或者忽略该报告——只要你的应用在本地测试中一切正常。

异常信息 #

Exception java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.google.testing.helium.utp.android.companion.instrumentations.uid/com.google.testing.helium.utp.android.companion.activities.BlankActivity}: java.lang.ClassNotFoundException: Didn't find class "com.google.testing.helium.utp.android.companion.activities.BlankActivity" on path: DexPathList[[zip file "/data/app/~~C1cmoyISzg5fmEUSMOhwmg==/com.google.testing.helium.utp.android.companion.instrumentations.uid-w1rDXgaGUs9bWsebvD-zuw==/base.apk"],nativeLibraryDirectories=[/data/app/~~C1cmoyISzg5fmEUSMOhwmg==/com.google.testing.helium.utp.android.companion.instrumentations.uid-w1rDXgaGUs9bWsebvD-zuw==/lib/x86_64, /system/lib64, /system_ext/lib64]]
  at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3613)
  at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:3864)
  at android.app.servertransaction.LaunchActivityItem.execute (LaunchActivityItem.java:103)
  at android.app.servertransaction.TransactionExecutor.executeCallbacks (TransactionExecutor.java:135)
  at android.app.servertransaction.TransactionExecutor.execute (TransactionExecutor.java:95)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:2253)
  at android.os.Handler.dispatchMessage (Handler.java:106)
  at android.os.Looper.loopOnce (Looper.java:201)
  at android.os.Looper.loop (Looper.java:288)
  at android.app.ActivityThread.main (ActivityThread.java:7870)
  at java.lang.reflect.Method.invoke
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:548)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1003)
Caused by java.lang.ClassNotFoundException: Didn't find class "com.google.testing.helium.utp.android.companion.activities.BlankActivity" on path: DexPathList[[zip file "/data/app/~~C1cmoyISzg5fmEUSMOhwmg==/com.google.testing.helium.utp.android.companion.instrumentations.uid-w1rDXgaGUs9bWsebvD-zuw==/base.apk"],nativeLibraryDirectories=[/data/app/~~C1cmoyISzg5fmEUSMOhwmg==/com.google.testing.helium.utp.android.companion.instrumentations.uid-w1rDXgaGUs9bWsebvD-zuw==/lib/x86_64, /system/lib64, /system_ext/lib64]]
  at dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:218)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:379)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:312)
  at android.app.AppComponentFactory.instantiateActivity (AppComponentFactory.java:95)
  at android.app.Instrumentation.newActivity (Instrumentation.java:1285)
  at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3600)

内容的提问来源于stack exchange，提问作者Piotr Aleksander Chmielowski