使用XML添加SubMenu子菜单

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<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.submenu"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="15"        android:targetSdkVersion="20" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name"            android:theme="@android:style/Theme.Light.NoTitleBar" >                        <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

XML:

<menu xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    tools:context="com.example.submenu.MainActivity" >    <item        android:showAsAction="never"        android:title="文件">        <menu            >            <item             android:id="@+id/new_file"             android:showAsAction="never"             android:title="新建"                />            <item             android:id="@+id/open_file"             android:showAsAction="never"             android:title="打开"                />            <item             android:id="@+id/save_file"             android:showAsAction="never"             android:title="保存"                />            </menu>        </item>    <item        android:showAsAction="never"        android:title="编辑">        <menu            >            <item             android:id="@+id/c_edit"             android:showAsAction="never"             android:title="复制"                />            <item             android:id="@+id/v_edit"             android:showAsAction="never"             android:title="粘贴"                />            <item             android:id="@+id/x_edit"             android:showAsAction="never"             android:title="剪切"                />            </menu>        </item></menu>

package com.example.submenu;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuInflater;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);    MenuInflater inflater=getMenuInflater();    inflater.inflate(R.menu.main, menu);//    SubMenu file=menu.addSubMenu("文件");//    SubMenu edit=menu.addSubMenu("编辑");//    file.setHeaderTitle("文件操作");//    file.setHeaderIcon(R.drawable.ic_launcher);//    file.add(1,1,1,"新建");//    file.add(1,2,1,"打开");//    file.add(1,3,1,"保存");//    edit.setHeaderTitle("编辑操作");//    edit.setHeaderIcon(R.drawable.ic_launcher);//    edit.add(2,1,1,"复制");//    edit.add(2,2,1,"粘贴");//    edit.add(2,3,1,"剪切");        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.//        int id = item.getItemId();//        if (id == R.id.action_settings) {//            return true;//        }    switch (item.getItemId()) {case R.id.new_file:Toast.makeText(MainActivity.this,"点击了新建",Toast.LENGTH_SHORT).show();break;case R.id.open_file:Toast.makeText(MainActivity.this,"点击了打开",Toast.LENGTH_SHORT).show();break;case R.id.save_file:Toast.makeText(MainActivity.this,"点击了保存",Toast.LENGTH_SHORT).show();break;case R.id.c_edit:Toast.makeText(MainActivity.this,"点击了复制",Toast.LENGTH_SHORT).show();break;case R.id.v_edit:Toast.makeText(MainActivity.this,"点击了粘贴",Toast.LENGTH_SHORT).show();break;case R.id.x_edit:Toast.makeText(MainActivity.this,"点击了剪切",Toast.LENGTH_SHORT).show();break;default:break;}        return super.onOptionsItemSelected(item);    }}

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