When you import libuvccamera module in your project instead of building these samples from this repository

Don't forget to add dependency to libcommon repository.

Your top level build.gradle should include maven { url 'http://raw.github.com/saki4510t/libcommon/master/repository/' } in repositories in allprojects section

allprojects {
    repositories {
        maven { url 'http://raw.github.com/saki4510t/libcommon/master/repository/' }
        jcenter()
    }
}

and commonLibVersion= '1.4.3' in ext section.

...
ext {
    ...
    commonLibVersion= '1.4.3'
    ...
}

build.gradle of usbCameraCommon module should include

compile("com.serenegiant:common:${commonLibVersion}") {
	exclude module: 'support-v4'
}

If you don't include usbCameraCommon module in your project, please add above in you application module(that you want to use libuvccamera).

After that, please sync your gradle project, then gradle will automatically download it from Github.