android - Firebase 测试实验室报告：java.lang.NoClassDefFoundError

Question

严重异常会导致应用程序中止，因此可能会将用户返回到操作系统主屏幕。

FATAL EXCEPTION: main
    Process: com.example.app, PID: XXXXX
    java.lang.NoClassDefFoundError: com.example.app.MainActivity$19
    at com.example.app.MainActivity.onCreate(MainActivity.java:421)
    at android.app.Activity.performCreate(Activity.java)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java)
    at android.app.ActivityThread.access$900(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java)
    at android.os.Handler.dispatchMessage(Handler.java)
    at android.os.Looper.loop(Looper.java)
    at android.app.ActivityThread.main(ActivityThread.java)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)

但在开发环境中没有遇到上述问题