集群管理和服务发现(Cluster management and service discovery)

 所以答案很简单。 我真的需要将我的lib复制到系统映像到system / lib文件夹，因为make命令不会将它从out / target / product / generic / system / lib复制到system.img 
 
 诀窍是添加这一行 
 
  PRODUCT_COPY_FILES += $(LOCAL_PATH)/my_lib.so:system/lib/my_lib.so
 
 到full.mk文件。 它的位置是：android-source / build / target / product也把my_lib.so放在它附近（如路径所示） 
 
 如果您计划在实际设备上运行映像，请在设备名称定义后添加此行。 f.ex. 如果您在Nexus 4上运行，请将其放在android-source / device / lge / mako / full_mako.mk 

So the answer was quite simple. I really need to copy my lib to the system image, to the system/lib folder, because the make command doesn't copy it from out/target/product/generic/system/lib to system.img
 
the trick is to add this line
 
  PRODUCT_COPY_FILES += $(LOCAL_PATH)/my_lib.so:system/lib/my_lib.so
 
to full.mk file. it's location is: android-source/build/target/product also put the my_lib.so near it (as seen by the path)
 
if you are planning to run the image on a real device, add this line after the device name definition. f.ex. if you are running on Nexus 4, put it at android-source/device/lge/mako/full_mako.mk