There is a java project which was compiled to sample.jar as debug version, converted to sample.dex by using dx, pushed to Android emulator(Android 5.1.1), and run on the device. This project was developed to boot specific App on Android device and test the App.
The sample.dex is indeed successfully run on devices because all the behaviores and outputs are correct. The problem deeply confused us is that we cannot debug it step by step as an Remote java application by using DDMS/Android device monitor, which is useful in Android 4.4.2(API Level 19).
PS: the emulator is rooted and I have tried several ways to fixed this problem, including selectting the USB debug in Developer mode and change the API Level to 23, all these efforts do not work.
How to fix it.....