动态禁用ActionBar按钮

Question

I want to disable the "attachment" button when there is no attachment is the page user loads. I searched every stack overflow suggestion but I think I'm getting something wrong. What I did is:

• set a boolean to find if there are attachments.
• call invalidateOptionsMenu();

• try to disable the action bar button

   @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu items for use in the action bar MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.inpostmenu, menu); return super.onCreateOptionsMenu(menu); if (attachments) { menu.findItem(R.id.attach).setEnabled(!attachments); } } 

I get an Unreachable Statement error on

menu.findItem(R.id.attach).setEnabled(!attachments);

What is wrong with my code?

Answer 1

The Unreachable Statement is because you're trying to do stuff after the function already returned. That code can never be reached. Try:

menu.findItem(R.id.attach).setEnabled(attachments);
return super.onCreateOptionsMenu(menu);