Android进阶教程之----Android 中MenuInflater的使用(布局定义

我们传统意义上 的定义菜单感觉比较繁琐，当我们使用MenuInflater 来生成菜单，你会发现是多么的爽朗，呵呵，我今天的小Demo,是定义四个菜单，并且实现了一个菜单事件。就是我们点击设置 (Setting )菜单，进入手机设置状态！下面看一下效果图:

  

下面是实现Demo 的详细步骤:

一、建立一个Android 工程我们命名为MenuInflaterDemo .

二、在res 目录下创建menu 目录，并且创建options_menu.xml (我们定义的菜单)文件,代码如下:

"1.0" encoding="utf-8"?>

  xmlns:android="">
    "@+id/menu_add"
          android:title="Add"
          android:icon="@android:drawable/ic_menu_add"
           />
    "@+id/menu_wallaper"
          android:title="Wallpaper"
          android:icon="@android:drawable/ic_menu_gallery"
           />
   "@+id/menu_search"
          android:title="Search"
          android:icon="@android:drawable/ic_search_category_default"
           />
   "@+id/menu_setting"
          android:title="Settings"
          android:icon="@android:drawable/ic_menu_preferences"
           />

<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android=""> <item android:id="@+id/menu_add" android:title="Add" android:icon="@android:drawable/ic_menu_add" /> <item android:id="@+id/menu_wallaper" android:title="Wallpaper" android:icon="@android:drawable/ic_menu_gallery" /> <item android:id="@+id/menu_search" android:title="Search" android:icon="@android:drawable/ic_search_category_default" /> <item android:id="@+id/menu_setting" android:title="Settings" android:icon="@android:drawable/ic_menu_preferences" /> </menu>

三、主类MenuInflaterDemo.java 的编码，这里写的代码很少哦，我这里只写了第四个菜单(Settings )的响应事件.全部代码如下:

package com.android.tutor;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
public class MenuInflaterDemo extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.options_menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.menu_add:

            break;
        case R.id.menu_wallaper:
            break;
        case R.id.menu_search:
            break;
        case R.id.menu_setting:
            showSettings();
            break;
        }
        return super.onOptionsItemSelected(item);
    }


    private void showSettings(){

     final Intent settings = new Intent(android.provider.Settings.ACTION_SETTINGS);
            settings.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
                    Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);

        startActivity(settings);
   }
}

package com.android.tutor; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; public class MenuInflaterDemo extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.options_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_add: break; case R.id.menu_wallaper: break; case R.id.menu_search: break; case R.id.menu_setting: showSettings(); break; } return super.onOptionsItemSelected(item); } private void showSettings(){ final Intent settings = new Intent(android.provider.Settings.ACTION_SETTINGS); settings.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED); startActivity(settings); } }

四、运行代码之，点击模拟器上的menu 按钮将会出现上述效果图!