using Android.App;
using Android.OS;
using Android.Views;
using Android.Widget;

namespace MenuDemo
{
  [Activity(Label = "@string/ApplicationName", MainLauncher = true, Icon = "@drawable/Icon")]
  public class MainActivity : Activity
  {
    protected override void OnCreate(Bundle bundle)
    {
      base.OnCreate(bundle);

      SetContentView(Resource.Layout.Main);
      var iv = FindViewById<ImageView>(Resource.Id.iv);
      iv.SetImageResource(Resource.Drawable.test);
      RegisterForContextMenu(iv);
    }
    //與一個(gè)活動(dòng)關(guān)聯(lián)
    public override bool OnCreateOptionsMenu(IMenu menu)
    {
      base.OnCreateOptionsMenu(menu);
      const int menuItemId = Menu.First;
      const int menuItemOrder = Menu.None;
      const int munuItemText = Resource.String.menuItem1;
      /*
       * 第一個(gè)參數(shù)：組值
       * 第二個(gè)參數(shù)：菜單唯一標(biāo)示
       * 第三個(gè)參數(shù)：順序參數(shù)
       * 第四個(gè)參數(shù)：文本
       */
      menu.Add(1, menuItemId, menuItemOrder, munuItemText);
      menu.Add(2, menuItemId + 10, menuItemOrder + 1, "菜單2");
      menu.Add(2, menuItemId + 20, menuItemOrder + 2, "菜單3" );
      var subMenu = menu.AddSubMenu(0, menuItemId + 30, menuItemOrder + 3, "子菜單" );
      subMenu.SetHeaderIcon(Resource.Drawable.more);
      var subMenuItem1 = subMenu.Add(0, menuItemId + 40, menuItemOrder + 4,"子菜單-1" );
      subMenuItem1.SetIcon(Resource.Drawable.more);
      var subMenuItem2 = subMenu.Add(0, menuItemId + 50, menuItemOrder + 5,"子菜單-2" ).SetCheckable(true);
      subMenuItem2.SetIcon(Resource.Drawable.blue);
      subMenu.Add(0, menuItemId + 60, menuItemOrder + 6, "子菜單-3" ).SetCheckable(true);
      return true;
    }

    public override bool OnOptionsItemSelected(IMenuItem item)
    {
      Toast.MakeText(this, "當(dāng)前菜單編號(hào)" + item.ItemId, ToastLength.Long).Show();
      return base.OnOptionsItemSelected(item);
    }


    public override void OnCreateContextMenu(IContextMenu menu, View v, IContextMenuContextMenuInfo menuInfo)
    {
      base.OnCreateContextMenu(menu, v, menuInfo);
      menu.SetHeaderTitle("上下文菜單");
      menu.SetHeaderIcon(Resource.Drawable.blue);
      menu.Add(0, Menu.First, Menu.None, "菜單1");
      menu.Add(0, Menu.First+1,Menu.None, "菜單2").SetShortcut('2','B');
      menu.Add(0, Menu.First + 2, Menu.None, "菜單3");
      var subMenu = menu.AddSubMenu("子菜單");
      subMenu.Add("子菜單選項(xiàng)");
    }
  }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:minWidth="25px"
  android:minHeight="25px">
  <ImageView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/iv" />
</LinearLayout>

package com.example.halower.menudemo;

import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuInflater;
import android.view.View;
import android.widget.ImageView;


public class MainActivity extends Activity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ImageView iv=(ImageView)findViewById(R.id.iamgeView);
    iv.setImageResource(R.drawable.test);
    registerForContextMenu(iv);
  }

  @Override
  public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    MenuInflater inflater=new MenuInflater(this);
    inflater.inflate(R.menu.menu_main,menu);
    menu.setHeaderIcon(R.drawable.blue);
    menu.setHeaderTitle(R.string.menuTitle);
  }
}

<?xml version="1.0" encoding="utf-8"?>
<resources>

  <string name="app_name">MenuDemo</string>
  <string name="action_settings">Settings</string>
  <string name="item1Name" >菜單1</string>
  <string name="item2Name" >菜單2</string>
  <string name="item3Name" >菜單3--More</string>
  <string name="item4Name" >菜單4</string>
  <string name="menuTitle">XML中解析菜單</string>
  <string name="subitem1Name">子菜單1</string>
  <string name="subitem2Name">子菜單2</string>
</resources>