MainActivity.java

mPicasso = new Picasso.Builder(getApplicationContext())
       .downloader(new OkHttp3Downloader(okClient))
       .loggingEnabled(true)
       .build();

if (BuildConfig.DEBUG) {
            Stetho.initialize(
                    Stetho.newInitializerBuilder(this)
                            .enableDumpapp(Stetho.defaultDumperPluginsProvider(this))
.enableWebKitInspector(RealmInspectorModulesProvider.builder(this).build())
                            .build());
        }