Creating SubMenus in Android

In my previous post I expained how to create Context Menu. In this post I show how to create SubMenus in android.

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="SubMenu Example"
        android:textSize="20sp"
        android:gravity="center" />
       

</LinearLayout>

SubMenusActivity.java

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.widget.Toast;

public class SubMenusActivity extends Activity {
   
    private static final int FILE=0;
    private static final int EDIT=1;
   
    private static final int NEW=Menu.FIRST;
    private static final int SAVE=NEW+1;
   
    private static final int UNDO=SAVE+1;
    private static final int REDO=UNDO+1;
   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        /*
         * To add a new sub menu to the menu
         */
        SubMenu file=menu.addSubMenu("File");
        SubMenu edit=menu.addSubMenu("Edit");
       
        file.setHeaderIcon(R.drawable.iconimage);
        /*
         * to add a new item to the menu
         */
        file.add(FILE,NEW,0,"New");
        file.add(FILE, SAVE, 1, "Save");
       
        edit.setHeaderIcon(R.drawable.iconimage);
        edit.add(EDIT,UNDO,0,"Undo");
        edit.add(EDIT,REDO,1,"Redo");
       
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId())
        {
        case NEW:
            message("New");
            break;
        case SAVE:
            message("Save");
            break;
        case UNDO:
            message("Undo");
            break;
        case REDO:
            message("Redo");
        }
        return super.onOptionsItemSelected(item);
    }

    private void message(String msg) {
        msg+=" selected!!!";
        Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
    }
   
   
}

Before run this application put an image "iconimage" into the drawable folder.
Run your project and click on the menu button in emulator then you see the following output.