Java/Android which coding method is preferred? -

as self taught coder have question coding best practice. have written same program in 2 different ways, , give me guidance on way preferred? might cpu overhead or ram usage or coding best practice perspective. appreciate there may many answers or theories question, , know isn't stack overflow here for, me stack overflow question coding style causing me problems , don't know method should either sticking or adopting.

both examples have simple xml layout file 2 buttons , 2 updatable textviews (not included here).

example 1. (the way tend code @ moment)

public class mainactivity extends activity {      button button1add, button2add;     textview text1display, text2display;     int count1, count2;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          initilizebuttons();         setuplisteners();     }      public void initilizebuttons() {         button1add = (button) findviewbyid(r.id.button1);         button2add = (button) findviewbyid(r.id.button2);         text1display = (textview) findviewbyid(r.id.textview1);         text2display = (textview) findviewbyid(r.id.textview2);          count1 = integer.parseint(text1display.gettext().tostring());         count2 = integer.parseint(text2display.gettext().tostring());     }      public void setuplisteners() {         button1add.setonclicklistener(new onclicklistener() {             @override             public void onclick(view arg0) {                 count1++;                 text1display.settext(string.valueof(count1));             }         });          button2add.setonclicklistener(new onclicklistener() {             @override             public void onclick(view arg0) {                 count2++;                 text2display.settext(string.valueof(count2));             }         });     }  } 

example 2. (the way think should coding?)

public class mainactivity extends activity {      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          initilizebuttons();      }      public void initilizebuttons() {         button button1add = (button) findviewbyid(r.id.button1);         button button2add = (button) findviewbyid(r.id.button2);          button1add.setonclicklistener(new onclicklistener() {             @override             public void onclick(view arg0) {                 textview text1display = (textview) findviewbyid(r.id.textview1);                 int headcount = integer.parseint(text1display.gettext().tostring());                 headcount++;                 text1display.settext(string.valueof(headcount));             }          });          button2add.setonclicklistener(new onclicklistener() {             @override             public void onclick(view arg0) {                 textview text2display = (textview) findviewbyid(r.id.textview2);                 int bodycount = integer.parseint(text2display.gettext().tostring());                 bodycount++;                 text2display.settext(string.valueof(bodycount));             }          });     }  } 

in example 1 assume quicker (i.e. less cpu) i've declared variables , add them throughout programme. i'm worried here ram usage.

in example 2 think cause more cpu usage has redeclare variables each time used, maybe uses less ram?

these examples, , i'm sure not cause in way of cpu or ram overheads. apply information answer supply general coding practice.

i think example 1 should preferred way.

the ram usage not increase much, widgets existing if use findviewbyid or not. reference objects shown.

personally use androidannotations allows drop initilizebuttons() can add annotations fields , library injects them you. @ thier code comparison on thier website... awesome. , supports many other nice features. , best part is, uses code generation , not use runtime reflection(what costs cpu , performance) other similar librarys...