Android ImageMenu

Androidアプリで【HOME】ボタン処理をオーバーロードし、カスタマイズメニューを出します。

res/layout/custommenu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

    <ImageButton
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:contentDescription="@string/app_name"
        android:src="@android:drawable/ic_menu_send" />

    <ImageButton
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:contentDescription="@string/app_name"
        android:src="@android:drawable/ic_menu_save" />

    <ImageButton
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:contentDescription="@string/app_name"
        android:src="@android:drawable/ic_menu_search" />

    <ImageButton
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:contentDescription="@string/app_name"
        android:src="@android:drawable/ic_menu_preferences" />

</LinearLayout>

Activity

package com.sqlendia.android;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;

public class Android2_22Activity extends Activity
{
    MenuDialog menuDialog;

    public class MenuDialog extends AlertDialog
    {
        public MenuDialog(Context context)
        {
            super(context);
            setTitle("Menu");
            View menu = getLayoutInflater().inflate(R.layout.custommenu, null);
            setView(menu);
        }

        @Override
        public boolean onKeyUp(int keyCode, KeyEvent event)
        {
            if (keyCode == KeyEvent.KEYCODE_MENU)
            {
                dismiss();
                return true;
            }
            return super.onKeyUp(keyCode, event);
        }

    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event)
    {
        if (keyCode == KeyEvent.KEYCODE_MENU || keyCode == KeyEvent.KEYCODE_BACK)
        {
            if (menuDialog == null)
            {
                menuDialog = new MenuDialog(this);
            }
            menuDialog.show();
            return true;
        }
        return super.onKeyUp(keyCode, event);
    }

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}