I have been trying to configure Android Studio for NDk by following this article and this article. The following are the contents of my gradle-wrapper.properties
Have you declare your NDK path in Local.property file ??
Looks like the environment path and the local.properties files are pointing to different locations:
PATH: C:\Program Files (x86)\Android\android-ndk-r9d
local.properties: C:\Program Files (x86)\Android\android-studio\android-ndk-r9d
Make sure which is right. You can keep the PATH and drop the local.properties declerations, and then try this command through the console: ndk-build -? to see if it was found in PATH