Android 选项菜单 Option Menu 学习教程

Android 选项菜单 Option Menu 学习教程

Option Menu 菜单 分为两种

1，图标菜单，这个菜单显示在屏幕的最鲜明，最多可以放6个菜单项，不支持复选框，单选按钮

2，扩展菜单，当图标菜单超过6个是，菜单只会显示5个菜单，第6个菜单会跳到扩展菜单，以后的菜单都会放到扩展菜单，并且垂直排列

3，有图有真相

所以图片都是系统自带的

多余6个图标菜单，会自动出现一个 更多

点击就可以看到扩展菜单

不多说了，直接上代码

package Rw.OptionsMenu;

 

import Android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.Toast;

 

public class OptionsMenu extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    }

    public boolean onCreateOptionsMenu(Menu menu) {

                           //解释一下add这个方法

                                                    // 菜单群，群中Item的ＩＤ，排序的序号，文字显示；；；；后面是图标，我这里就一个群，可以自己添加啊

                                                  //还有一种菜单是在ＸＭＬ中定义，大家可以自己查看文档

                           menu.add(Menu.NONE,  1,8, "删除").setIcon(android.R.drawable.ic_menu_delete);

                            menu.add(Menu.NONE, 2, 2, "保存").setIcon(android.R.drawable.ic_menu_edit);

                            menu.add(Menu.NONE, 3, 6, "帮助").setIcon(android.R.drawable.ic_menu_help);

                            menu.add(Menu.NONE,  4, 1, "添加").setIcon( android.R.drawable.ic_menu_add);

                            menu.add(Menu.NONE, 5, 4, "详细").setIcon( android.R.drawable.ic_menu_info_details);

                            menu.add(Menu.NONE, 3, 3, "发送").setIcon(android.R.drawable.ic_menu_send);

                            menu.add(Menu.NONE, 7, 7, "分享").setIcon(android.R.drawable.ic_menu_share);

                            menu.add(Menu.NONE, 8, 5, "查找").setIcon(android.R.drawable.ic_menu_search);

                            menu.add(Menu.NONE, 9, 9, "拨号").setIcon(android.R.drawable.ic_menu_call);

                              // return true才会起作用

                            return true;

            

    }

    public boolean onOptionsItemSelected(MenuItem item){

         switch (item.getItemId()) {

         case 1:

                    Toast.makeText(this, "删除", Toast.LENGTH_LONG).show();

                   break;

         case 2:

                    Toast.makeText(this, "保存", Toast.LENGTH_LONG).show();

                   break;

         case 3:

                    Toast.makeText(this, "帮助", Toast.LENGTH_LONG).show();

                   break;

         case 4:

                    Toast.makeText(this, "添加", Toast.LENGTH_LONG).show();

                   break;

         case 5:

                    Toast.makeText(this, "详细", Toast.LENGTH_LONG).show();

                   break;

         case 6:

                    Toast.makeText(this, "发送", Toast.LENGTH_LONG).show();

                   break;

         case 7:

                    Toast.makeText(this, "分享", Toast.LENGTH_LONG).show();

                   break;

         case 8:

                    Toast.makeText(this, "查找", Toast.LENGTH_LONG).show();

                   break;

         case 9:

                    Toast.makeText(this, "拨号", Toast.LENGTH_LONG).show();

                   break;

         default:

                   break;

         }

             return false;         

    }

    public void onOptionMenuClosed(Menu menu){

               Toast.makeText(this, "选项菜单关闭了", Toast.LENGTH_LONG).show();

    }

    public boolean onPrepareOptionsMenu(Menu menu){

         Toast.makeText(this, "选项菜单显示之前onPrepareOptionsMenu方法会被调用", Toast.LENGTH_LONG).show();

         return true;

       }

}