Disk caching in Picasso with OkHttp interceptors

PicassoCaching.java

// module level build.gradle dependencies
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.squareup.okhttp3:okhttp:3.4.2'
compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.2'

// imports
import com.jakewharton.picasso.OkHttp3Downloader;
import com.squareup.picasso.Picasso;

import java.io.IOException;

import okhttp3.Cache;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Response;

// getter
private Picasso getPicasso() {
        OkHttpClient okHttpClient1 = new OkHttpClient.Builder()
                .addInterceptor(new Interceptor() {
                    @Override
                    public Response intercept(Chain chain) throws IOException {
                        Response originalResponse = chain.proceed(chain.request());
                        return originalResponse.newBuilder().header("Cache-Control", "max-age=" + (60 * 60 * 24 * 365))
                                .build();
                    }
                })
                .cache(new Cache(MainActivity.this.getCacheDir(), Integer.MAX_VALUE))
                .build();

        OkHttp3Downloader downloader = new OkHttp3Downloader(okHttpClient1);
        Picasso picasso = new Picasso.Builder(this).downloader(downloader).build();
        Picasso.setSingletonInstance(picasso);
        return picasso;
    }