I modified createLockScreen method of LockPatternKeyguardView.java in 
framework,intend to change default LockScreen. In createLockScreen method I 
use reflection to new my own lockscreen view in my own lockscreen apk which 
would be installed in /system/app/.
It works fine when i build the entire system with eng mode,but not fine 
with usr mode.Log shows me that reflection find no such method in my own 
lockscreen view. I decompile the apk in each build mode,find out that apk 
build with usr mode does not have constructor,and some other method are 
lost either.
Can anyone explain this weird situation for me?
BTW,my apk share uid with android.uid.system and my Android.mk add this 
line:LOCAL_JAVA_LIBRARIES := android.policy framework because I need to use 
some internal apis of Keyguard.

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