Android學習筆記之Menu一級菜單、二級菜單的使用

Android學習筆記之Menu一級菜單、二級菜單的使用

（1）布局檔案沒有做更改

（2）在res--menu目錄下的main.xml檔案中代碼如下：

                                                            vcGVu">                                                                                                            

（3）values目錄下的string.xml檔案中：

    Menu_submenu    Settings    Hello world!    檔案    建立    開啟    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 {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@Overridepublic 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 */@Overridepublic 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 */@Overridepublic 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);}}