1, java.lang.UnsatisfiedLinkError: Couldn't load xxxxx: findLibrary returned null
当 apk 是被放到 /system/app 下，这时它找 so 的路径变为了：=/data/app-lib/iSetting(apk的名字)
报错log：
07-23 22:41:29.124: E/AndroidRuntime(9209): Caused by: java.lang.UnsatisfiedLinkError: Couldn't load hello from loader dalvik.system.PathClassLoader[dexPath=/system/app/iSetting.apk,libraryPath=/data/app-lib/iSetting]: findLibrary returned null
这时，找到so，push上去即可：adb push libhello.so /data/app-lib/iSetting