Activityにメニューを追加

            android:id="@+id/add_item"
        android:title="add" 
        />
		    android:id="@+id/removee_item"
	    android:title="remove"
	    />

// 
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Activity， 
		//R.menu.main, 
		//menu， ， Menu 
		getMenuInflater().inflate(R.menu.main, menu);

		return true;// ，false， 
	}

	// ， 
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.add_item:
			Toast.makeText(FirstActivity.this, "This is add menu", Toast.LENGTH_LONG).show();
			break;

		case R.id.removee_item:
			Toast.makeText(FirstActivity.this, "This is remove menu", Toast.LENGTH_LONG).show();
		default:
			break;
		}
		return true;
	}