android - how to set 'this' object(TableLayout) by findViewById? -

i defined own tablelayout extents tablelayout. in class i'm trying create mytablelayout object:

int tablelayoutid = r.id.tablelayoutid; mytablelayout tablelayout = new mytablelayout(this); tablelayout.createtablelayout(tablelayoutid); 

in last line above, object tablelayout calls function 'createtablelayout'. in function, i'm trying set it('this' object) findviewbyid i'm doing silly guess. how should set it?

public class mytablelayout extends tablelayout {      public mytablelayout(context context) {         super(context);     }      public void createtablelayout(int tablelayoutid) {          // should write here(instead line below) in order let          // 'this' have returned view findviewbyid          = (mytablelayout) findviewbyid(tablelayoutid);         ...     } } 

or maybe should other way?

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after reading cricket comment, changed code in class:

if (getresources() != null) {     mytablelayout tablelayout = (mytablelayout)         getresources().getlayout(r.layout.tablelayout);     if (tablelayout != null) {         tablelayout.createtablelayout();     } } 

my xml contains mytablelayout object create table programmatically through it.

and mytablelayout looks so:

public class mytablelayout extends tablelayout {  public mytablelayout(context context) {     super(context); }  public void createtablelayout() {     (int = 0; < numrows; ++i) {         tablerow tablerow = new tablerow(getcontext());         tablerow.setlayoutparams(new tablerow.layoutparams(tablerow.layoutparams.fill_parent, tablerow.layoutparams.wrap_content));          (int j = 0; j < numcols; ++j) {             mybutton mybutton = new mybutton(getcontext(), buttonid, buttonviewheight, buttonviewwidth, buttonviewtext);             mybutton.setlayoutparams(new tablerow.layoutparams(buttonviewheight, buttonviewwidth));             tablerow.addview(mybutton);         }         addview(tablerow, new tablelayout.layoutparams(tablelayout.layoutparams.fill_parent, tablelayout.layoutparams.wrap_content));     } } 

}

and app crashes. know why?

the breakpoint reaches line , crashes:

mytablelayout tablelayout = (mytablelayout)         getresources().getlayout(r.layout.tablelayout); 

succeeded finally.

1.

i removed mytablelayout xml.

2.

in class' oncreate accessed layout want add mytablelayout:

linearlayoutgame = (linearlayout) findviewbyid(r.id.linearlayout); 

3.

i created , added layout

mytablelayout tablelayout = new mytablelayout(this); tablelayout.createtablelayout(); linearlayout.addview(tablelayout);