android: changing option menu items programmatically

Question

Is it possible to change the option menu items programmatically? Can anyone provide me with an example please?

Also, I want to disable certain items, so that they do

Answer 1

Like Nikolay said do that in onPrepareOptionsMenu().

For menu items in the action bar you have to invalidate the menu with activity.invalidateOptionsMenu();

This is descriped in more detail here How can I refresh the ActionBar when onPrepareOptionsMenu switched menu entries?

Answer 2

You can do something simple like I did. Just change the text to what is needed when the menu item is touched. I needed to turn the sound off and on, plus the ability to perform an action by touching it. Here is my code:

    @Override
public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {
    case R.id.audioOn:
        audioOn = !audioOn;
        if (audioOn)
            item.setTitle("Audio Off");
        else
            item.setTitle("Audio On");
        return true;

    case R.id.touchOn:
        touchOn = !touchOn;
        if (touchOn)
            item.setTitle("Touch Off");
        else
            item.setTitle("Touch On");
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

audioOn and touchOn are booleans checked in other parts of the code. Hope this helps.

Answer 3

menu.xml

  <item 
    android:id="@+id/item1"
    android:title="your Item">
  </item>

put in your java file

  public void onPrepareOptionsMenu(Menu menu) {

    menu.removeItem(R.id.item1);
}

Answer 4

Kotlin Code for accessing toolbar OptionsMenu items programmatically & change the text/icon ,..:

1-We have our menu item in menu items file like: menu.xml, sample code for this:

 <?xml version="1.0" encoding="utf-8"?> 
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto">
<item android:id="@+id/balance"
      android:title="0"
      android:orderInCategory="100"
      app:showAsAction="always" />
 </menu>

2- Define a variable for accessing menu object in class :

var menu: Menu? = null

3- initial it in onCreateOptionsMenu :

override fun onCreateOptionsMenu(menu: Menu): Boolean {
    // Inflate the menu; this adds items to the action bar if it is present.
    menuInflater.inflate(R.menu.main, menu)
    this.menu = menu
    return true
}

4- Access the menu items inside your code or fun :

private fun initialBalanceMenuItemOnToolbar() {
var menuItemBalance = menu?.findItem(R.id.balance)
    menuItemBalance?.title = Balance?.toString() ?: 0.toString()
    // for change icon : menuWalletBalance?.icon
}

Answer 5

In case you have a BottomBar:

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    if (mBottomBar.getCurrentTabId() == R.id.tab_more) {
        getMenuInflater().inflate(R.menu.more_menu, menu);
    }

    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.preferences:
            startActivity(new Intent(this, PreferenceActivity.class));
            break;
    }

    return super.onOptionsItemSelected(item);
}

Then you just need to call:

@Override
public void onBottomBarClick(int tabId) {
    supportInvalidateOptionsMenu();
}

Answer 6

@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.calendar, menu);
        if(show_list == true) {         

        if(!locale.equalsIgnoreCase("sk")) menu.findItem(R.id.action_cyclesn).setVisible(false);

        return true;
    }