Android: To set a button invisible -

on double tap, buttons toggled visible/invisible. created layout dynamically. working if btns visible want them invisible.

my doubletap fn is

public boolean ondoubletap(motionevent arg0) {     // todo auto-generated method stub      if (visible)     {         b1.setvisibility(view.invisible);         b2.setvisibility(view.invisible);         b3.setvisibility(view.invisible);         b4.setvisibility(view.invisible);         visible = false;     }     else     {         b1.setvisibility(view.visible);         b2.setvisibility(view.visible);         b3.setvisibility(view.visible);         b4.setvisibility(view.visible);         visible = true;     }     return false; } 

where "visible" boolean value.

i tried these in oncreate() , in onstart()

    b1.setvisibility(view.invisible);     b2.setvisibility(view.invisible);     b3.setvisibility(view.invisible);     b4.setvisibility(view.invisible);     visible = false; 

but if add not getting visible on double tap. checked them toast, executed not made visible.

can help. both modification or fresh code ok if works.

thanks in advance...

if in activity then

button btn = new button(youractivity.this); btn.setvisibility(view.invisible); 

and if in fragment then:

button btn = new button(getactivity()); btn.setvisibility(view.invisible); 

and if trying make buttons invisible in oncreate method. suppose have done in oncreate:

button btn = new button(this); btn.setvisibility(view.invisible); 

then have vice-versa of have done in on touch.