Android:How To use Sub_menu category in menu options

Question

In My Activity i place a Option Menu like Text Options when the user click the text option an another option menu(Sub_menu) want to be load with text Colour and text size adjustment how can we do this in Android Plz help i am New To Android

Answer 1

Have your menu_activity.xml have all the menu item you want. If you don't want to show a menu item initially then set its visibility to false. android:visible="false"

<item
    android:id="@+id/text_options"
    android:orderInCategory="2"
    android:title="@string/text_options"
    app:showAsAction="ifRoom"/>
<item
    android:id="@+id/text_color"
    android:orderInCategory="3"
    android:title="@string/text_color"
    android:visible="false"
    app:showAsAction="ifRoom"/>       
<item
    android:id="@+id/text_size"
    android:orderInCategory="4"
    android:title="@string/text_size"
    android:visible="false"
    app:showAsAction="ifRoom"/>      

In your Activity have the following methods:

private boolean isShown = true;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_activity, menu);
    return true;
}

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    menu.findItem(R.id.text_options).setVisible(!isShown);
    menu.findItem(R.id.text_color).setVisible(isShown);
    menu.findItem(R.id.text_size).setVisible(isShown);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.text_options:
            hideMenu();
    }
    return super.onOptionsItemSelected(item);
}

public void hideMenu() {
    isShown = false;
    invalidateOptionsMenu();
}

public void showMenu() {
    isShown = true;
    invalidateOptionsMenu();
}

Once you call invalidateOptionsMenu(), the menu list will be recalculated, i.e, onPrepareOptionsMenu() will be called. Modify this a bit and you can achieve what you are looking for.

UPDATE:

If you want to add a sub_menu, then modify your menu_activity.xml to look like below:

You can add a submenu to an item in any menu (except a submenu) by adding a element as the child of an . Submenus are useful when your application has a lot of functions that can be organized into topics, like items in a PC application's menu bar (File, Edit, View, etc.). For example:

 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/file"
          android:title="@string/file" >
        <!-- "file" submenu -->
        <menu>
            <item android:id="@+id/create_new"
                  android:title="@string/create_new" />
            <item android:id="@+id/open"
                  android:title="@string/open" />
        </menu>
    </item>
</menu> To use the menu in your activity, you need to inflate the menu resource (convert the XML resource into a programmable object)

using MenuInflater.inflate(). In the following sections, you'll see how to inflate a menu for each menu type.

More info here: http://developer.android.com/guide/topics/ui/menus.html