第二章实例：Android窗口菜单显示

package test.main.cls;

import com.example.popupwindow.R;

import android.app.Activity;

import android.os.Bundle;

import android.view.ContextMenu;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.Gravity;

import android.view.Menu;

import android.view.MenuItem;

import android.view.SubMenu;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.view.ViewGroup.LayoutParams;

import android.widget.Button;

import android.widget.PopupMenu;

import android.widget.PopupMenu.OnMenuItemClickListener;

import android.widget.PopupWindow;

import android.widget.Toast;

public class PopupWindows extends Activity {

    @Override

    public void onCreateContextMenu(ContextMenu menu, View v,

            ContextMenuInfo menuInfo) {

        menu.setHeaderIcon(R.drawable.ic_launcher);

        SubMenu submenu = menu.addSubMenu("系统修复");//该方法返回submenu接口对象，想必menu实现了submenu接口

        submenu.add(0, 0, 0, "自动修复").setIcon(R.drawable.ic_launcher);

        submenu.add(0, 1, 0, "修复外存").setIcon(R.drawable.ic_launcher);

        submenu.add(0, 2, 0, "修复硬件").setIcon(R.drawable.ic_launcher);

        //------------------------------------------

        menu.setHeaderIcon(R.drawable.ic_launcher);

        SubMenu submenus = menu.addSubMenu("全局修复");//该方法返回submenu接口对象，想必menu实现了submenu接口

        submenus.add(0, 0, 0, "完全修复").setIcon(R.drawable.ic_launcher);

        submenus.add(0, 1, 0, "无损修复").setIcon(R.drawable.ic_launcher);

        submenus.add(0, 2, 0, "完美修复").setIcon(R.drawable.ic_launcher);

        super.onCreateContextMenu(menu, v, menuInfo);

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        SubMenu submenu = menu.addSubMenu("毁灭系统");//该方法返回submenu接口对象，想必menu实现了submenu接口

        submenu.add(0, 0, 0, "全盘毁灭").setIcon(R.drawable.ic_launcher);

        submenu.add(0, 1, 0, "毁灭外存").setIcon(R.drawable.ic_launcher);

        submenu.add(0, 2, 0, "毁灭硬件").setIcon(R.drawable.ic_launcher);

        //submenu.add(0, 4, 0, "毁灭电池").setIcon(R.drawable.ic_launcher).setIntent(/*Intent*/);

        //submenu.add(0, 3, 0, "毁灭屏幕").setShortcut('F', '5');

        //submenu.setGroupCheckable(0, true, true);按钮组是否可勾选

        //-----------------------------------------

        SubMenu submenu1 = menu.addSubMenu("发送诈骗信息");

        submenu1.add(0, 0, 0, "发送给全部好友");

        submenu1.add(0, 1, 0, "发送给最近联系");

        submenu1.add(0, 2, 0, "随机发送");

        submenu1.add(0, 3, 0, "发送国外");

        return super.onCreateOptionsMenu(menu);

    }

    @Override

    public void onOptionsMenuClosed(Menu menu) {

        // TODO Auto-generated method stub

        super.onOptionsMenuClosed(menu);

    }

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        View contentv = this.getLayoutInflater().inflate(R.layout.main_layout, null);

        this.setContentView(contentv);

        //-------------------------------------------

        Button btn = (Button)findViewById(R.id.clickssss);

        final PopupMenu pMenu = new PopupMenu(PopupWindows.this,btn);

        this.getMenuInflater().inflate(R.menu.popup_menu, pMenu.getMenu());

        btn.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                pMenu.show();

            }

        });

        pMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {

            @Override

            public boolean onMenuItemClick(MenuItem item) {

                Toast.makeText(PopupWindows.this, item.getTitle(), Toast.LENGTH_LONG).show();

                return true;

            }

        });

        ///------------------------------------------

        //注意：：findViewById需要setContentView后可用

        this.registerForContextMenu(contentv);//给一个View绑定上下文菜单

    }

}

xml:
//main_layout

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <Button

        android:id="@+id/clickssss"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="弹出"/>

</LinearLayout>

xml:

//menu/popup_menu.xml

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

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <group android:checkableBehavior="none">

        <item android:id="@+id/menu_1"

            android:title="这是一个弹出菜单"/>

        <item android:id="@+id/menu_2"

            android:title="其用法也非常简单"/>

        <item android:id="@+id/menu_3"

            android:title="控件使用不是重点"/>

        <item android:id="@+id/menu_4"

            android:title="重点是要理解代码"/>

    </group>

</menu>