Menu basics

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//////////////////////////////////////// contents of res/layout/player_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
	<item 
		android:id="@+id/previous" 
		android:title="@string/previous" 
		android:enabled="false"
		android:icon="@android:drawable/ic_media_previous"/>
		<!--these may not be available in next api (level > 3), so be carefull-->
	<item 
		android:id="@+id/play_pause" 
		android:title="@string/play" 
		android:icon="@android:drawable/ic_media_play"/>
	<item 
		android:id="@+id/next" 
		android:title="@string/next" 
		android:icon="@android:drawable/ic_menu_next"/>
</menu>


///////////////////////////////////////////// within SilentPlayerActivity class

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

@Override
public boolean onOptionsItemSelected(MenuItem item) {
	switch (item.getItemId()) {
	case R.id.previous: 
		previous(); //go to previous song in the playlist
		return true;
	case R.id.play_pause:
		isPlaying() ? pause() : play(); //toggle play/pause
		return true; 
	case R.id.next:
		next(); //go to next song in the playlist
		return true;
	} 
	return false; //should never happen
}

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
	//set play_pause menu item look
	if(isPlaying()) {
		menu
			.findItem(R.id.play_pause)
			.setTitle(R.string.pause)
			.setIcon(android.R.drawable.ic_media_pause);
	} else {
		menu
			.findItem(R.id.play_pause)
			.setTitle(R.string.play)
			.setIcon(android.R.drawable.ic_media_play);
	}	
	return true;
}

////////////////////////////////////// version 2: creating options menu in code

public static final MENU_PREVIOUS = 0; //no more R.ids 
public static final MENU_PLAY_PAUSE = 1;
public static final MENU_NEXT = 2;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
	menu
		.add(0, MENU_PREVIOUS, 0, R.string.previous)
		.setIcon(android.R.drawable.ic_media_previous);
	menu
		.add(0, MENU_PLAY_PAUSE, 0, R.string.play)
		.setIcon (android.R.drawable.ic_media_play);
	menu
		.add(0, MENU_NEXT, 0, R.string.next)
		.setIcon(android.R.drawable.ic_media_next);
	return true;
}

///////////////////////////////////////////////////////////////////////// notes

//to desable/enable menu item
menu.findItem(R.id.next).setEnabled(false);

//it's mostly the same with context menus; we have:
	//onCreate/PrepareContextMenu(Menu menu)
	//onContextItemSelected(MenuItem item)
	//registerForContextMenu(View song)
	
//submenus in code
menu
	.addSubMenu(R.id.repeat)
		.add(R.id.one)
		.add(R.id.all)
		.add(R.id.none);
		
//submenus in xml
<item android:id="@+id/repeat" android:title="@string/repeat">
<menu>
	<item android:id="@+id/one" android:title="@string/repeat_one"></item>
	<item android:id="@+id/all" android:title="@string/repeat_all"></item>
	<item android:id="@+id/none" android:title="@string/repeat_none"></item>
</menu>