Menu及其自定义皮肤的处理

SimpleMenuActivity.java代码：

package org.penguin.study.android.menu;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.InflateException;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

/**
 * 官方资料：http://developer.android.com/guide/topics/ui/menus.html
 * Menu资料：http://developer.android.com/guide/topics/resources/menu-resource.html
 */
public class SimpleMenuActivity extends Activity {
	private TextView messageTV;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		messageTV = (TextView) findViewById(R.id.messageTV);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// // groupId:分组的Id，如果不用分组就用0
		// // ItemId:menu当中每一项的Id，这个Id应该是唯一的
		// // order:排列的顺序
		//
		// menu.add(0, 19991, 1, "打开").setIcon(R.drawable.icon);
		// menu.add(0, 19992, 2, "关闭").setIcon(R.drawable.delicious);
		// menu.add(0, 19993, 0, "帮助").setIcon(R.drawable.google);
		// int menuItemCounts = menu.size();
		// messageTV.setText("Menu项数：" + menuItemCounts);
		MenuInflater menuInflater = getMenuInflater();
		menuInflater.inflate(R.menu.simple_menu, menu);
		setMenuBackGround();
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		messageTV.setText(String.format("分组Id：%d、ItemId：%d、顺序：%d、标题:%s", item.getGroupId(), item.getItemId(), item.getOrder(), item.getTitle()));
		return super.onOptionsItemSelected(item);
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		System.out.println("KeyCode    ===    " + keyCode + "、" + KeyEvent.KEYCODE_BACK);
		if (keyCode == KeyEvent.KEYCODE_BACK) {
			System.out.println("模拟器中ESC键是Back键");
			// Toast.makeText(this.getApplicationContext(), "你按下了Home键",
			// Toast.LENGTH_LONG).show();
			// AlertDialog.Builder(SimpleMenuActivity.this).setTitle("提示标题").setMessage("这是提示内容").show();
			new AlertDialog.Builder(SimpleMenuActivity.this).setTitle("您确认要退出吗？").setMessage("这是提示内容").setPositiveButton("退出", new OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					System.out.println("1 === " + dialog.getClass() + "、" + which + "、" + Dialog.BUTTON_POSITIVE);
				}
			}).setNegativeButton("取消", new OnClickListener() {

				@Override
				public void onClick(DialogInterface dialog, int which) {
					System.out.println("2 === " + dialog.getClass() + "、" + which + "、" + Dialog.BUTTON_NEGATIVE);
				}
			}).create().show();
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

	// 核心代码：重写Layout.Factory.onCreateView()方法自定义布局
	protected void setMenuBackGround() {
		SimpleMenuActivity.this.getLayoutInflater().setFactory(new LayoutInflater.Factory() {

			@Override
			public View onCreateView(String name, Context context, AttributeSet attrs) {
				if (name.equalsIgnoreCase("com.android.internal.view.menu.IconMenuItemView")
						|| name.equalsIgnoreCase("com.android.internal.view.menu.ListMenuItemView")) {
					LayoutInflater layoutInflater = getLayoutInflater();
					try {
						final View view = layoutInflater.createView(name, null, attrs);
						new Handler().post(new Runnable() {
							@Override
							public void run() {
								view.setBackgroundColor(Color.BLUE);
								// view.setBackgroundResource(R.drawable.icon);
							}
						});
						return view;
					} catch (InflateException e) {
						System.err.println(e.getMessage());
					} catch (ClassNotFoundException e) {
						System.err.println(e.getMessage());
					}
				}
				return null;
			}
		});
	}
}

 布局文件main.xml代码：

<?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:layout_height="wrap_content" android:text="@string/hello"
		android:id="@+id/messageTV" />
</LinearLayout>

 menu/simple_menu.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
	<item android:id="@+id/openMenuItem" android:icon="@drawable/icon"
		android:title="@string/open" />
	<item android:id="@+id/helpMenuItem" android:icon="@drawable/google"
		android:title="@string/help" />
	<item android:id="@+id/closeMenuItem" android:icon="@drawable/delicious"
		android:title="@string/close" />
	<item android:title="废话1" />
	<item android:title="废话2" />
	<item android:title="废话3" />
	<item android:title="更多1" />
	<item android:title="更多2" />
	<item android:title="更多3" />
	<item android:title="更多4" />
	<item android:title="更多5" />
	<item android:title="更多6" />
	<item android:title="更多7" />
	<item android:title="更多8" />
	<item android:title="更多9" />
</menu>

至于用到的图片(ico.png、google.png、delicious.png)均为png格式，从网上随便早点就ok了。一般放到drawable-hdpi目录就ok了。

strings.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">有些事情，做了才有可能；如果仅是欣赏，我们只有回忆，但却不曾拥有</string>
    <string name="app_name">友好的菜单入门</string>
    <string name="help">帮助</string>
    <string name="open">打开</string>
    <string name="close">关闭</string>
</resources>