问题已解决！看来，Android QUEMU模拟器仅支持ARM5(APP_ABI:=armeabi)，而我的库是使用armeabi-v7a编译的.

Problem solved! it appears, Android QUEMU emulator only supports ARM5 (APP_ABI:=armeabi), and my library was compiled with armeabi-v7a.

更新:问题不再存在.