The newly installed eclipse does not have NDK components, and the installation package I use is: android-ndk32-r10b-windows-x86_64.zip, open preferences as follows
Under Android there should be an NDK entry that sets the NDK directory and installs it by Help->install new software
Location: Input: https://dl-ssl.google.com/android/eclipse/
There are a lot of tools in the developer tools, just install the Android native development tools This one, I installed it all before, the result in preferences not even Android this one, So here's a note, as long as you install this item
Installation process will ask you, some of the installation package is not signed, but also to install, do not care about it, a single yes installation, restart Eclipse after installation, and then look at preferences->android
There it is!
Reference: http://limssb.blog.163.com/blog/static/14730437201310634839753/
Eclipse Installs NDK components