根据本文，JIT被添加到Dalvik虚拟机中的Andr​​oid 2.2（升级Froyo）。这意味着蛋糕（1.5），甜甜圈（1.6）和巧克力慕斯蛋糕（2.1）没有它。该 Android的控制台告诉我，有设备仍然在野外的不到2％，无JIT。

Based on this article, JIT was added to the Dalvik VM in Android 2.2 (Froyo). This means Cupcake (1.5), Doughnut (1.6) and Eclair (2.1) don't have it. The Android Dashboard tells me that there are less than 2% of devices still in the wild without JIT.

就个人而言，我不会花费约没有JIT的设备一分钟的思考;一，那些老的设备将具有更小的屏幕和更少的资源，无论如何，并且不为我的应用目标。

Personally, I would not spend a minute thinking about devices without JIT; for one, those older devices would have smaller screens and fewer resources anyway, and aren't the target for my apps.