菜单的简单入门

public class WidgetActivity extends Activity {
    /** Called when the activity is first created. */
	private final String TAG = "WidgetActivity...";
	private Menu myMenu;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    	// TODO Auto-generated method stub
    	super.onCreateOptionsMenu(menu);
    	myMenu = menu;
    	addRegularMenuItems(menu);
    	addSeconderyMeunItems(menu);
    	
    	return true;
    }
    
    private void addSeconderyMeunItems(Menu menu) {
		// TODO Auto-generated method stub
		int base = Menu.CATEGORY_SECONDARY;
		
		menu.add(base, base+1, base+1, "sec. item 1");
		menu.add(base, base+2, base+2, "sec. item 2");
		menu.add(base, base+3, base+3, "sec. item 3");
		menu.add(base, base+3, base+3, "sec. item 4");
		menu.add(base, base+4, base+4, "sec. item 5");
	}

	@Override
    public boolean onOptionsItemSelected(MenuItem item) {
    	// TODO Auto-generated method stub
    	//一下是你的业务逻辑代码
    	Log.i(TAG, item.getItemId()+ ""	);
    	if(item.getItemId() == 1){
    		appendText("\nHello...");
    	}else if(item.getItemId() ==2){
    		appendText("\nitem2");
    	} else if( item.getItemId() == 3){
    		emptyText();
    	}else if( item.getItemId() == 4){
    		this.appendMenuItemText(item);
    		this.myMenu.setGroupVisible(Menu.CATEGORY_SECONDARY, false);
    	} else if(item.getItemId() == 5	){
    		this.appendMenuItemText(item);
    		this.myMenu.setGroupVisible(Menu.CATEGORY_SECONDARY, true);
    	}
    	else if( item.getItemId()==6){
    		this.appendMenuItemText(item);
    		this.myMenu.setGroupEnabled(Menu.CATEGORY_SECONDARY, true);
    	}else if(item.getItemId() == 7){
    		this.appendMenuItemText(item);
    		this.myMenu.setGroupEnabled(Menu.CATEGORY_SECONDARY, false);
    	}else if(item.getItemId() == 8 ){
    		this.appendMenuItemText(item);
    		this.myMenu.setGroupCheckable(Menu.CATEGORY_SECONDARY, true, false);
    	}else if(item.getItemId()==9){
    		this.appendMenuItemText(item);
    		this.myMenu.setGroupCheckable(Menu.CATEGORY_SECONDARY, false, false);
    	}
    	else 
    		this.appendMenuItemText(item);
    	return super.onOptionsItemSelected(item);
    }
    
    private void emptyText() {
		// TODO Auto-generated method stub
    	TextView tv = (TextView) findViewById(R.id.textView);
    	tv.setText("");
	}

	private void appendMenuItemText(MenuItem item) {
		// TODO Auto-generated method stub
		String title = item.getTitle().toString();
		TextView textView = (TextView) findViewById(R.id.textView);
		textView.setText(textView.getText() + "\n" + title);
	}

	private void appendText(String string) {
		// TODO Auto-generated method stub
		TextView tv = (TextView) findViewById(R.id.textView);
		tv.setText(tv.getText() + string);
	}

	private void addRegularMenuItems(Menu menu){
    	int base = Menu.FIRST;
    	
    	menu.add(base, base, base, "append");
    	menu.add(base, base+1, base+1, "item2");
    	menu.add(base, base + 2, base + 2, "clear");
    	
    	menu.add(base,base+3,base+3,"hide secondery");
    	menu.add(base, base+4, base+4, "show secomdery");
    	
    	menu.add(base, base+5, base+5, "enable scondery");
    	menu.add(base, base+6, base+6, "disable secondery");
    	
    	menu.add(base, base+7, base+7, "check secondery");
    	menu.add(base, base+8, base+8, "uncheck secondery");
    }
}