Download old version ndk

Official download ndk address: http://developer.android.com/tools/sdk/ndk/index.html#Downloads

However, if you need to download the old version of ndk, Google does not directly provide a link. You can download the old version of ndk from the following link:

Http://dl.google.com/android/ndk/android-ndk-<version>-<platform>. <fileextension>

The <version> ndk version, such as R7/r7b/r7c/R8/r8b and other content, <platform> for the target operating system, can be: Windows/darwin-x86/linux-x86, corresponds to: Windows, Mac OS X (Intel), and Linux 32/64-bit (x86) platforms. <fileextension> is the file suffix. If <platform> is windows, it is "Zip", otherwise it is "tar.bz2 ".

For example, to download ndkr8 in Linux, you can use the link:

Http://dl.google.com/android/ndk/android-ndk-R8-Linux-x86.Tar.bz2