Build AI Camera App (Caffe2)

AI Camera app from Facebook is an example app that shows how to build Caffe2 on Android platform. Unfortunately, you will find that it does not work with the latest Android Studio. Here is how to get it to work.

One of the main reasons that it does not build is because starting with NDK r18b, GCC has been removed. The easiest way to get it working is to download older version, say r17c, and edit local.properties file and change ndk.dir to r17c folder.

Other than that, a couple of minor changes. In gradle.build file, update gradle version to 3.2.1 as below:

classpath 'com.android.tools.build:gradle:3.0.1'
classpath 'com.android.tools.build:gradle:3.2.1'

Lastly, edit gradle/wrapper/gradle-wrapper.properties file and change gradle tool version to 4.6 as below:

distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

After all these changes, the app should successfully build! Happy hacking!