Titanium Studio 3.4.1.xx Android SDK缺失

Question

Titanium Studio 3.4.1.xx告诉我Android SDK丢失， 一些错误提示如下：

Node.js
  *  npm                new version v2.9.0 available! (currently v2.7.4)

Android Environment

  √√  tools              installed (v24.1.2)
  !  platform tools     untested version 22; may or may not work
  !  build tools        untested version 22.0.1; may or may not work

  !  ndk                Android NDK not found


Network
  √√  online
  -  no proxy server configured

它有什么问题？

如何解决？

有人帮忙吗？