android can't load library when lib project has both armeabi and armeabi-v7a directory in libs directory

android can't load library when lib project has both armeabi and
armeabi-v7a directory in libs directory

I has an android project that depends on a lib project. And the lib
project has an "armeabi" and "armeabi-v7a" directory in the "libs"
directory, and both of them have a .so file inside. And my own project has
only a armeabi directory in libs directory with a .so file inside.
Then I found when I run my project on a "armeabi-v7a" device it will
crash. It says can't load library in the log. It seems that the app try to
load the .so from "armeabi-v7a" directory but it dosen't have. Then I
created an "armeabi-v7a" directory in libs directory in my own project and
copied the .so file to the new directory and the app will be ok.
But it will increase the size of the apk package, is there any way to let
the app load the .so file in the "armeabi" directory? Or can I delete the
"armeabi-v7a" directory in the lib project? It seems to be ok...