How to open the options menu programmatically?

问题:

I would like to open the optionsMenu programmatically without a click on the menu key from the user. How would I do that?

回答1:

Or just call Activity.openOptionsMenu()?

回答2:

Apparently, doing it in onCreate breaks app, since Activity's not yet attached to a window. If you do it like so:

@Override
public void onAttachedToWindow() {
    openOptionsMenu(); 
};

...it works.

回答3:

For developers using the new Toolbar class of the Support Library, this is how it's done:

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.showOverflowMenu();

回答4:

Put this line of code in your onResume(), this should help!

new Handler().postDelayed(new Runnable() { 
   public void run() { 
     openOptionsMenu(); 
   } 
}, 1000); 

回答5:

from an OnClickListener inside an activity called MainActivity:

MainActivity.this.openOptionsMenu();

回答6:

if using AppCompatActivity

getSupportActionBar().openOptionsMenu();

回答7:

Two ways to do it:

Activity.getWindow().openPanel(Window.FEATURE_OPTIONS_PANEL, event);

The event argument is a KeyEvent describing the key used to open the menu, which can modify how the menu is displayed based on the type of keyboard it came from.

Or... by simulating that the user has pressed the button:

IWindowManager wManager = IWindowManager.Stub.asInterface(ServiceManager.getService("window"));
KeyEvent kd = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_SOFT_LEFT);
KeyEvent ku = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_SOFT_LEFT);
wManager.injectKeyEvent(kd.isDown(), kd.getKeyCode(), kd.getRepeatCount(), kd.getDownTime(), kd.getEventTime(), true);

回答8:

If you are inside an your view, you can write

    ((Activity)getContext()).openOptionsMenu();

回答9:

After a long research and many tries, the only way seems to be simulating a KeyEvent. This makes the options menu appear:

BaseInputConnection mInputConnection = new BaseInputConnection( findViewById(R.id.main_content), true);
KeyEvent kd = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MENU);
KeyEvent ku = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MENU);
mInputConnection.sendKeyEvent(kd);
mInputConnection.sendKeyEvent(ku);

回答10:

For me, declaring toolbar.showOverflowMenu() in onClick is not worked. openOptionsMenu() also not worked for me. Instead of that the following way is worked for me,

new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                toolbar.showOverflowMenu();
            }
        }, 500);

回答11:

toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    toolbar.setTitleTextColor(0xFFFFFFFF);

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            toolbar.showOverflowMenu();
        }
    }, 100);