java.lang.ClassNotFoundException not specifying missing class

Question

I am getting the following error but the weird thing is that it is not specifying the class that is missing:

java.lang.RuntimeException: 
  at android.app.ActivityThread.handleReceiver (ActivityThread.java:3681)
  at android.app.ActivityThread.access$2000 (ActivityThread.java:229)
  at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1903)
  at android.os.Handler.dispatchMessage (Handler.java:102)
  at android.os.Looper.loop (Looper.java:148)
  at android.app.ActivityThread.main (ActivityThread.java:7406)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1230)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1120)
Caused by: java.lang.ClassNotFoundException: 
  at dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:56)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:511)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:469)
  at android.app.ActivityThread.handleReceiver (ActivityThread.java:3676)

ps.: The error only occurs in production. Emulator/test devices are fine

Answer 1

Check Proguard.txt or proguard configuration file. Proguard might be removing some classes while shrinking/obfuscation.

If you're using any external libraries, you need to add code to keep those classes in proguard file.

Answer 2

清理项目，然后重建可能工作的项目。