Android: How to Enable/Disable Option Menu Item on Button Click

Android: How to enable/disable option menu item on button click?

Anyway, the documentation covers all the things.

Changing menu items at runtime

Once the activity is created, the
onCreateOptionsMenu() method is called
only once, as described above. The
system keeps and re-uses the Menu you
define in this method until your
activity is destroyed. If you want to
change the Options Menu any time after
it's first created, you must override
the onPrepareOptionsMenu() method.
This passes you the Menu object as it
currently exists. This is useful if
you'd like to remove, add, disable, or
enable menu items depending on the
current state of your application.

E.g.

@Override
public boolean onPrepareOptionsMenu (Menu menu) {
    if (isFinalized) {
        menu.getItem(1).setEnabled(false);
        // You can also use something like:
        // menu.findItem(R.id.example_foobar).setEnabled(false);
    }
    return true;
}

On Android 3.0 and higher, the options menu is considered to always be open when menu items are presented in the action bar. When an event occurs and you want to perform a menu update, you must call invalidateOptionsMenu() to request that the system call onPrepareOptionsMenu().

Enable/Disable ActionBar Menu Item

@Override
public boolean onPrepareOptionsMenu(Menu menu) {

    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.addprojectmenu, menu);      

    menu.getItem(0).setEnabled(false); // here pass the index of save menu item
    return super.onPrepareOptionsMenu(menu);

}

Just inflate it on prepare time and disable after inflated menu no need to inflate in oncreateoptionemenu time or you can just use last two line of code after inflating from onCreateOptionMenu.

@Override
public boolean onPrepareOptionsMenu(Menu menu) {

    menu.getItem(0).setEnabled(false); // here pass the index of save menu item
    return super.onPrepareOptionsMenu(menu);

}

How to disable menu button and the action bar still remains there

Hardware menu button is not controlled by onPrepareOptionsMenu(). Generally speaking, it is not good practice to change the behavior of hardware buttons because users expect it to behave a certain way (which I believe is to expand the overflow menu).

If you absolutely have to disable it, you could listen for it to be pressed in our Activities like this:

public boolean dispatchKeyEvent(KeyEvent event) {
    final int keycode = event.getKeyCode();
    final int action = event.getAction();
    if (keycode == KeyEvent.KEYCODE_MENU && action == KeyEvent.ACTION_UP) {
        return true; // consume the key press
    }
    return super.dispatchKeyEvent(event);
}

how to disable multiple clicks on menu option in android

You can set the visibility or enable/disable the item by code.

MenuItem item = menu.findItem(R.id.your_item);
item.setVisible(true);
item.setEnabled(false);

Of course you have to check somewhere whether to enable oder disable the icon.

android - Enable and Disable MenuItem on Navigation Drawer Activity Layout

You can access menu from NavigationView.getMenu()

Below is code :

NavigationView navigationView= findViewById(R.id.nav_id_in_layout)

Menu menuNav=navigationView.getMenu();
MenuItem nav_item2 = menuNav.findItem(R.id.nav_item2);
nav_item2.setEnabled(false)

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