https://qooah.com/2013/12/02/%e3%80%90%e6%8a%80%e8%a1%93%e6%96%87%e7%ab%a0%e3%80%91%e5%ae%8c%e5%85%a8%e8%aa%8d%e7%9f%a5-android-4-4-%e4%b8%ad-art-%e8%88%87-dalvik-%e6%9c%83%e6%9c%89%e5%a4%9a%e5%a4%a7%e5%88%86%e5%88%a5/