SamplingInterceptor.java

public class SamplingInterceptor implements Interceptor
{
    @Override
    public Response intercept(Chain chain) throws IOException
    {
        Request request = chain.request();
        DeviceBandwidthSampler.getInstance().startSampling();
        Response response = chain.proceed(request);
        DeviceBandwidthSampler.getInstance().stopSampling();
        return response;
    }
}

Hey, just happened upon this and going to offer some unsolicited advice.
This DeviceBandwidthSampler.stopSampling() appears to be used for measuring the time to complete an entire call.
This code stops sampling after the response headers come back. It looks like it is meant to be called after the response body is exhausted. You may want to check out the new OkHttp EventListener API.

Oh hey @NightlyNexus. Thanks!