本篇是对安卓菜单使用编程方式实现,当然可以使用XML的方式完成同样的功能,基本Java和C#写法都是一致的,所以使用XML的方式在本篇中使用Java演示,需要注意的是,对于如果不是VS开发的话,那么资源文件名称必须以小写开头,否则会报错。
运行效果
C#实现
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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);
}
//与一个活动关联
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;
/*
* 第一个参数:组值
* 第二个参数:菜单唯一标示
* 第三个参数:顺序参数
* 第四个参数:文本
*/
menu.Add(1, menuItemId, menuItemOrder, munuItemText);
menu.Add(2, menuItemId + 10, menuItemOrder + 1, "菜单2" );
menu.Add(2, menuItemId + 20, menuItemOrder + 2, "菜单3" );
var subMenu = menu.AddSubMenu(0, menuItemId + 30, menuItemOrder + 3, "子菜单" );
subMenu.SetHeaderIcon(Resource.Drawable.more);
var subMenuItem1 = subMenu.Add(0, menuItemId + 40, menuItemOrder + 4, "子菜单-1" );
subMenuItem1.SetIcon(Resource.Drawable.more);
var subMenuItem2 = subMenu.Add(0, menuItemId + 50, menuItemOrder + 5, "子菜单-2" ).SetCheckable( true );
subMenuItem2.SetIcon(Resource.Drawable.blue);
subMenu.Add(0, menuItemId + 60, menuItemOrder + 6, "子菜单-3" ).SetCheckable( true );
return true ;
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
Toast.MakeText( this , "当前菜单编号" + 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( "上下文菜单" );
menu.SetHeaderIcon(Resource.Drawable.blue);
menu.Add(0, Menu.First, Menu.None, "菜单1" );
menu.Add(0, Menu.First+1,Menu.None, "菜单2" ).SetShortcut( '2' , 'B' );
menu.Add(0, Menu.First + 2, Menu.None, "菜单3" );
var subMenu = menu.AddSubMenu( "子菜单" );
subMenu.Add( "子菜单选项" );
}
}
}
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Layout
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<? 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 >
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运行效果
Java实现
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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);
}
}
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Layout
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<? xml version = "1.0" encoding = "utf-8" ?>
< resources >
< string name = "app_name" >MenuDemo</ string >
< string name = "action_settings" >Settings</ string >
< string name = "item1Name" >菜单1</ string >
< string name = "item2Name" >菜单2</ string >
< string name = "item3Name" >菜单3--More</ string >
< string name = "item4Name" >菜单4</ string >
< string name = "menuTitle" >XML中解析菜单</ string >
< string name = "subitem1Name" >子菜单1</ string >
< string name = "subitem2Name" >子菜单2</ string >
</ resources >
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