How can we use a variable in R.id

Question

The content of xml are

Answer 1

the id is an intiger value not string: hope u ll get an idea from below code

 while (ctr<3)
{
   int layoutid;
    if(ctr==1)
    { layoutid = R.id.AbsoluteLayout1;}
    else{
     layoutid = R.id.AbsoluteLayout2;}
    mainlayout[ctr] = (AbsoluteLayout)findViewById(layoutid);
    ctr++;
}
---------------------------------------------

all these won post an error as they are handled as int itself manipulate as you want you cant use this as it is as

int[] ctra={R.id.xx,R.id.xxx};
  int i=0;
 while (ctr<3)
{
mainlayout[i]=(AbsoluteLayout)findViewById(ctra[i]);
i++;}

Answer 2

I solved it using getIdentifier method

Button[] buttons; 
for(int i=0; i<buttons.length; i++) {
{
   String buttonID = "sound" + (i+1);

   int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
   buttons[i] = ((Button) findViewById(resID));
   buttons[i].setOnClickListener(this);
}