Android學習筆記之Menu一級菜單、二級菜單的使用

（1）布局文件沒有做更改

（2）在res--menu目錄下的main.xml文件中代碼如下：

    
    

        
        
            
            
            vcGVu">
            
        
    
    
    

        
        
            
            
            
            
        
    

（3）values目錄下的string.xml文件中：

    Menu_submenu
    Settings
    Hello world!
    文件
    新建
    打開
    選項

（3）MainActivity.java代碼如下：

package com.example.menu_submenu;

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

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	/*
	 * 處理一級菜單
	 */
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.file:
			Toast.makeText(MainActivity.this, "一級菜單file..", Toast.LENGTH_SHORT)
					.show();
			break;
		case R.id.chioce:
			Toast.makeText(MainActivity.this, "一級菜單chioce..",
					Toast.LENGTH_SHORT).show();
			break;

		default:
			break;
		}
		return super.onOptionsItemSelected(item);
	}

	/*
	 * 處理二級菜單的
	 */
	@Override
	public boolean onMenuItemSelected(int featureId, MenuItem item) {
		switch (item.getItemId()) {
		case R.id.create1:
			Toast.makeText(MainActivity.this, "處理二級菜單create1..",
					Toast.LENGTH_SHORT).show();
			break;
		case R.id.open1:
			Toast.makeText(MainActivity.this, "處理二級菜單create1..",
					Toast.LENGTH_SHORT).show();
			break;
		case R.id.create:
			Toast.makeText(MainActivity.this, "處理二級菜單create..",
					Toast.LENGTH_SHORT).show();
			break;
		case R.id.open:
			Toast.makeText(MainActivity.this, "處理二級菜單open..",
					Toast.LENGTH_SHORT).show();
			break;

		default:
			break;
		}
		return super.onMenuItemSelected(featureId, item);
	}
}