android控件之Menu的實現

今天學習Menu控件比較簡單，直接上代碼了。首先是布局文件：

<?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"
    >
    <TextView android:layout_width="fill_parent" 
    android:text="Menu測試" 
    android:textSize="24dp"
    android:layout_height="wrap_content"></TextView>
</LinearLayout>

package com.cloay;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

/**
 * MenuActivity.java
 * @author cloay
 * 2011-9-13
 */
public class MenuActivity extends Activity {
    /** Called when the activity is first created. */
    NotificationManager notificationManager;
    Intent intent;
    PendingIntent pendindIntent;
    Notification notification;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
        notification = new Notification();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        /*
         * 
         * add()方法的四個參數，依次是：
         * 
         * 1、組別，如果不分組的話就寫Menu.NONE,
         * 
         * 2、Id，這個很重要，Android根據這個Id來確定不同的菜單
         * 
         * 3、順序，那個菜單現在在前面由這個參數的大小決定
         * 
         * 4、文本，菜單的顯示文本
         */ 
        //圖標文件實現android系統自帶的文件
        menu.add(Menu.NONE, Menu.FIRST + 1, 1, "保存").setIcon(android.R.drawable.ic_menu_save);
        menu.add(Menu.NONE, Menu.FIRST + 2, 2, "添加").setIcon(android.R.drawable.ic_menu_add);
        menu.add(Menu.NONE, Menu.FIRST + 3, 3, "刪除").setIcon(android.R.drawable.ic_menu_delete);
        menu.add(Menu.NONE, Menu.FIRST + 4, 4, "發送").setIcon(android.R.drawable.ic_menu_send);
        menu.add(Menu.NONE, Menu.FIRST + 5, 5, "幫助").setIcon(android.R.drawable.ic_menu_help);
        menu.add(Menu.NONE, Menu.FIRST + 6, 6, "退出").setIcon(android.R.drawable.ic_menu_close_clear_cancel);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        // TODO Auto-generated method stub
        switch(item.getItemId()){
        case Menu.FIRST + 1:
            Toast.makeText(MenuActivity.this, "保存菜單被點擊了!", Toast.LENGTH_LONG).show();
            //intent = new Intent(MenuActivity.this,Myhandler.class);
            //startActivity(intent);
            //overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
            break;
        case Menu.FIRST + 2:
            Toast.makeText(MenuActivity.this, "添加菜單被點擊了!", Toast.LENGTH_LONG).show();
            break;
        case Menu.FIRST + 3:
            Toast.makeText(MenuActivity.this, "刪除菜單被點擊了!", Toast.LENGTH_LONG).show();
            break;
        case Menu.FIRST + 4:
            Toast.makeText(MenuActivity.this, "發送菜單被點擊了!", Toast.LENGTH_LONG).show();
            //通知在狀態欄顯示的圖標
            //notification.icon = android.R.drawable.ic_lock_silent_mode_off;
            //通知的內容
            //notification.tickerText = "發送菜單被點擊了!";
            //通知時發出的聲音
            //notification.defaults = Notification.DEFAULT_SOUND;
            //intent = new Intent(MenuActivity.this,mNotification.class);
            //intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_NEW_TASK);
            //pendindIntent = PendingIntent.getActivity(MenuActivity.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
            //notification.setLatestEventInfo(MenuActivity.this, "按鈕", "發送按鈕", pendindIntent);
            //notificationManager.notify(913, notification);
            break;
        case Menu.FIRST + 5:
            Toast.makeText(MenuActivity.this, "幫助菜單被點擊了!", Toast.LENGTH_LONG).show();
            break;
        case Menu.FIRST + 6:
            AlertDialog alertDialog = new AlertDialog.Builder(MenuActivity.this)
            .setTitle("提示！")
            .setIcon(R.drawable.ask)
            .setMessage("您確定要退出系統嗎?")
            .setPositiveButton("確定", 
            new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    System.exit(0);
                    dialog.cancel();  //提示對話框關閉
                }
            })
            .setNegativeButton("取消",
            new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // TODO Auto-generated method stub
                    dialog.cancel();    //關閉對話框
                }
            }).create();
            alertDialog.show();
            break;
        }
        return super.onMenuItemSelected(featureId, item);
    }
}

運行效果如下：