Why I Need Put *.so Files In Both Armeabi-v7a And Armeabi Folders?

I have to use a .so lib file by others, and it is necessary put the same file in both folders. Otherwise installing can NOT guarantee the lib file be placed in /data/data//lib. why

Solution 1:

Actually it's not the same. armeabi-v7a is optimized for v7a version which has float point operation support. With armeabi-v7a as the target device, it will run faster than armeabi which doesn't provide float point operation support. It's okay if you let your librariese on in armeabi, but if you can't take the advantage of the target CPU if your app is run on armeabi-v7a platform.

Have the different separated directory for your native library will let your app more portable, you should provide x86,x86_64,mips, etc. if you want your app run on any Android device or emulator currently supported.