Set Button Visibility

Question

I added a button in layout and obtained its reference in the activity:

Button button1=(Button)findViewById(R.id.button1);
button1.setVisiblity(View.Visible);

Program crashes with this code. How do I set its visibility correctly?

Answer 1

Whats the error? it should be View.VISIBLE (uppercase).

If you have a null pointer exception at that point, its probably because its not finding the view in your layout.

Answer 2

Steve,

Have you tried View.VISIBLE make sure the VISIBLE is in all caps.

Answer 3

the View.Visible should be in UpperCase , so try this :

button1.setVisibility(View.VISIBLE);

and if you aren't in the Activity and you want to change the Visibility , you should pass the Context of the Activity to that class in order to implement the method Acitivity.runOnUIThread(new Runnable());