android - Google Analytics and Dimension/Metrics params -

we developing google analytics android app, have seen can add custom dimension/metrics event doing:

t.send(new hitbuilders.screenviewbuilder()      .setcustomdimension(1, "premiumuser")      .build() ); 

but understand that custom dimension sent on event. there way set tracker automatically send events/screens? instance, like:

t.set("cd<1>", "premiumuser"); 

another question, have add: t.setscreenname(null) in every ondestroy of fragment/activity if sending setscreenname on oncreate method?

thanks in advance

if need screen recorded in analytics, need send screen view on every oncreate like

t.send(new hitbuilders.appviewbuilder().setcustomdimension(cusdimensionid, dimensionvalue).build()); 

there no need add t.setscreenname(null) on ondestroy

get tracker :

public synchronized tracker getcustomdimensiontracker(trackername trackerid) {     if (!mcustomdimensiontrackers.containskey(trackerid)) {          googleanalytics analytics = googleanalytics.getinstance(this);         if (trackerid == trackername.custom_dimension_tracker) {             tracker t = analytics.newtracker(app.get().getresources()                     .getstring(r.string.google_analytics_key));             mcustomdimensiontrackers.put(trackerid, t);         }     }     return mcustomdimensiontrackers.get(trackerid); }