How to change MenuItem icon in ActionBar programmatically

Question

How to change MenuItem icon in ActionBar programmatically? I tried to use

MenuItem menuItem = (MenuItem)findViewById(R.id.action_settings);
menuItem.setIcon(         


        

Answer 1

You can't use findViewById() on menu items in onCreate() because the menu layout isn't inflated yet. You could create a global Menu variable and initialize it in the onCreateOptionsMenu() and then use it in your onClick().

private Menu menu;

In your onCreateOptionsMenu()

this.menu = menu;

In your button's onClick() method

menu.getItem(0).setIcon(ContextCompat.getDrawable(this, R.drawable.ic_launcher));