Android application stops on button click -

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i making application , stops when press buttons

public class menu3 extends themenu{      button buttons[] = new button[21];     intent open = new intent("com.frosti.lidraedi.open");     int clicked;     boolean found;     int po1;     int goon;     int s,e;  protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      actionbar actionbar = getactionbar();     actionbar.setdisplayhomeasupenabled(true);      bundle b = getintent().getextras();     po1 = b.getint("po", 0);      switch (po1) {     case 21:                     //when press these buttons works         setcontentview(r.layout.menu21);         s=0;         e=11;         break;     case 22:                     //the layout loads without error                     //but when press buttons int layout stops         setcontentview(r.layout.menu22);         s=12;         e=15;         break;     case 23:         setcontentview(r.layout.menu23);         s=16;         e=20;         break;     case 24:         setcontentview(r.layout.menu24);         break;     case 25:         setcontentview(r.layout.menu25);         break;      default:         break;     }      init(); }  private void init() {     for(int c=s; c <= e; c++){         typeface tf = typeface.createfromasset(getassets(),"fonts/sourcesanspro-semibold.otf");         int d = c+1;         int viewid = getresources().getidentifier("b"+integer.tostring(d), "id", getpackagename());         if(viewid!=0){             buttons[c] =((button)findviewbyid(viewid));             buttons[c].settypeface(tf);             log.d("buttons", integer.tostring(c)+" : "+integer.tostring(d));         }else{             log.d("buttons", "0");         }     } }  public void buttononclick(view v){     log.d("buttononclick", "i clicked");     found=false;     int c= 0;     for(button b:buttons){         log.d("for loop", "i got run");         if(b.getid() == v.getid()){             log.d("if block", "i got found");             goon=c;             log.d("m3:true:c", integer.tostring(c)+ " : "+integer.tostring(v.getid()));             found=true;             break;         }         log.d("c var", "i incremented");         c++;  //hehehe         log.d("c var", "i got incremented");     }     log.i("buttononclick",integer.tostring(c));     if(found) {         log.i("m3:clicked:goon",integer.tostring(goon));         bundle b1 = new bundle();          b1.putint("goon",goon);          open.putextras(b1);         log.d("activity", "i opened");         startactivity(open);         overridependingtransition(r.anim.slide_in, r.anim.slide_out);     }else if(clicked != v.getid()){         clicked = v.getid();         toast.maketext(getapplicationcontext(),"skjárinn fannst því miður ekki",toast.length_short).show();     } }

ok open application press menu 22(that executes case 22 in switch block) press button , stops these errors get: the errors get.

if compare image code see executes "log.d("for loop", "i got run");" freaks out, error should in line " if(b.getid() == v.getid()){" have no idea why happens?
xml layout code in case if helps.

the button layout code

i appreciate if me this

try running following loop right after initialize buttons, sure of have:

for(button b : buttons){     log.d("have button id " + b.getid());

then run same loop @ start of onclick(). @ least tell if buttons structure sound. when in doubt of item causing npe, helps log them separately. times, it's non-obvious lifetime error, fragments.


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