java - onClick method doesnt work - 


protected void oncreate(bundle savedinstancestate)  {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_play);     gl = (gridlayout) findviewbyid(r.id.grid);     array = new button[7][6];     button btn;     for(int i=0; i<7; i++)     {         for(int j=0; j<6; j++)         {             btn = new button(this);             btn.setid(7*i + j + 1);             array[i][j] = btn;             gl.addview(btn);         }     }     turn = 0;     toast.maketext(this, "test", toast.length_short).show();                  }  @override public void onclick(view v)  {     toast.maketext(this, "test1", toast.length_short).show();                    if(v instanceof button)     {         toast.maketext(this, "test2", toast.length_short).show();         int[] d = getcellbyid(v.getid());         button b = (button)v;         b.setenabled(false);         if(turn == 0)         {             b.setbackgroundcolor(color.yellow);             turn = 1;         }         else         {             b.setbackgroundcolor(color.red);             turn = 0;         }         array[d[0]][d[1]] = b;     } }

this code, toasts testing if code running. activity implements onclicklistener

the onclick method not work, used because have 42 buttons , can't write 42 setonclicklistener() methods each button.

in code create, in 2 loop, 42 buttons (7*6) , every time each button pressed disabled , change background color of button 1 time yellow next time red , again.

you missing call following inside nested for loop:

btn.setonclicklistener(this);

here, this refers activity implements onclicklistener


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