Android 自定义PopupWindow实现的Menu(TabMenu)

用过UCWEB-Android版的人都应该对其特殊的menu有印象，把menu做成Tab-Menu(支持分页的Menu)，可以容纳比Android传统的menu更丰富的内容(Android的menu超过6项则缩略在[更多]里)，本文参考网上的例子,对例子进行简化以及封装，使其作为一个复合控件融入自己的framework。

先来看看本文程序运行的效果：


TabMenu本身就是一个PopupWindow，PopupWindow上面放了两个GridView,第一个GridView就是分页标签，位于PopupWindow的顶部，第二个GridView是菜单，位于PopupWindow的主体。为了实现PopupWindow的弹出/退出的动画效果，本文使用了以下代码：

在工程的res文件夹里添加anim子目录，再新建文件popup_enter.xml：

<?xml version="1.0" encoding="utf-8"?>  
<set xmlns:android="http://schemas.android.com/apk/res/android">  
    <translate android:fromYDelta="100%p" android:toYDelta="0" android:duration="1000" />  
    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="1000" />  
</set>

新建文件popup_exit.xml：

<?xml version="1.0" encoding="utf-8"?>  
<set xmlns:android="http://schemas.android.com/apk/res/android">  
    <translate android:fromYDelta="0" android:toYDelta="100%p" android:duration="1000" />  
    <alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="1000" />  
</set>

在工程的values文件夹里新建文件popup_animation.xml：

<?xml version="1.0" encoding="utf-8"?>  
<resources>     
    <style name="PopupAnimation" parent="android:Animation"> 
        <item name="android:windowEnterAnimation">@anim/popup_enter</item>  
        <item name="android:windowExitAnimation">@anim/popup_exit</item>   
    </style>  
</resources>

main.xml的源码如下：

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout android:id="@+id/LinearLayout01"  
    android:layout_width="fill_parent" android:layout_height="fill_parent"  
    xmlns:android="http://schemas.android.com/apk/res/android">  
    <TextView android:id="@+id/TextView01" android:layout_height="wrap_content"  
        android:layout_width="fill_parent" android:text="扩展Menu"></TextView>  
</LinearLayout>

TabMenu的封装类TabMenu.java的源码如下：

package com.iaiai.activity;

import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.LinearLayout.LayoutParams;

/**
 * 
 * <p>
 * Title: TabMenu.java
 * </p>
 * <p>
 * E-Mail: [e-mail]
 * </p>
 * <p>
 * QQ: 176291935
 * </p>
 * <p>
 * Http: iaiai.iteye.com
 * </p>
 * <p>
 * Create time: 2011-8-17
 * </p>
 * 
 * @author 丸子
 * @version 0.0.1
 */
public class TabMenu extends PopupWindow {
	private GridView gvBody, gvTitle;
	private LinearLayout mLayout;
	private MenuTitleAdapter titleAdapter;

	public TabMenu(Context context, OnItemClickListener titleClick,
			OnItemClickListener bodyClick, MenuTitleAdapter titleAdapter,
			int colorBgTabMenu, int aniTabMenu) {
		super(context);

		mLayout = new LinearLayout(context);
		mLayout.setOrientation(LinearLayout.VERTICAL);
		// 标题选项栏
		gvTitle = new GridView(context);
		gvTitle.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
				LayoutParams.WRAP_CONTENT));
		gvTitle.setNumColumns(titleAdapter.getCount());
		gvTitle.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
		gvTitle.setVerticalSpacing(1);
		gvTitle.setHorizontalSpacing(1);
		gvTitle.setGravity(Gravity.CENTER);
		gvTitle.setOnItemClickListener(titleClick);
		gvTitle.setAdapter(titleAdapter);
		gvTitle.setSelector(new ColorDrawable(Color.TRANSPARENT));// 选中的时候为透明色
		this.titleAdapter = titleAdapter;
		// 子选项栏
		gvBody = new GridView(context);
		gvBody.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
				LayoutParams.WRAP_CONTENT));
		gvBody.setSelector(new ColorDrawable(Color.TRANSPARENT));// 选中的时候为透明色
		gvBody.setNumColumns(4);
		gvBody.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
		gvBody.setVerticalSpacing(10);
		gvBody.setHorizontalSpacing(10);
		gvBody.setPadding(10, 10, 10, 10);
		gvBody.setGravity(Gravity.CENTER);
		gvBody.setOnItemClickListener(bodyClick);
		mLayout.addView(gvTitle);
		mLayout.addView(gvBody);

		// 设置默认项
		this.setContentView(mLayout);
		this.setWidth(LayoutParams.FILL_PARENT);
		this.setHeight(LayoutParams.WRAP_CONTENT);
		this.setBackgroundDrawable(new ColorDrawable(colorBgTabMenu));// 设置TabMenu菜单背景
		this.setAnimationStyle(aniTabMenu);
		this.setFocusable(true);// menu菜单获得焦点 如果没有获得焦点menu菜单中的控件事件无法响应
	}

	public void SetTitleSelect(int index) {
		gvTitle.setSelection(index);
		this.titleAdapter.SetFocus(index);
	}

	public void SetBodySelect(int index, int colorSelBody) {
		int count = gvBody.getChildCount();
		for (int i = 0; i < count; i++) {
			if (i != index)
				((LinearLayout) gvBody.getChildAt(i))
						.setBackgroundColor(Color.TRANSPARENT);
		}
		((LinearLayout) gvBody.getChildAt(index))
				.setBackgroundColor(colorSelBody);
	}

	public void SetBodyAdapter(MenuBodyAdapter bodyAdapter) {
		gvBody.setAdapter(bodyAdapter);
	}

	/**
	 * 自定义Adapter，TabMenu的每个分页的主体
	 * 
	 */
	static public class MenuBodyAdapter extends BaseAdapter {
		private Context mContext;
		private int fontColor, fontSize;
		private String[] texts;
		private int[] resID;

		/**
		 * 设置TabMenu的分页主体
		 * 
		 * @param context
		 *            调用方的上下文
		 * @param texts
		 *            按钮集合的字符串数组
		 * @param resID
		 *            按钮集合的图标资源数组
		 * @param fontSize
		 *            按钮字体大小
		 * @param color
		 *            按钮字体颜色
		 */
		public MenuBodyAdapter(Context context, String[] texts, int[] resID,
				int fontSize, int fontColor) {
			this.mContext = context;
			this.fontColor = fontColor;
			this.texts = texts;
			this.fontSize = fontSize;
			this.resID = resID;
		}

		public int getCount() {
			return texts.length;
		}

		public Object getItem(int position) {

			return makeMenyBody(position);
		}

		public long getItemId(int position) {
			return position;
		}

		private LinearLayout makeMenyBody(int position) {
			LinearLayout result = new LinearLayout(this.mContext);
			result.setOrientation(LinearLayout.VERTICAL);
			result.setGravity(Gravity.CENTER_HORIZONTAL
					| Gravity.CENTER_VERTICAL);
			result.setPadding(10, 10, 10, 10);

			TextView text = new TextView(this.mContext);
			text.setText(texts[position]);
			text.setTextSize(fontSize);
			text.setTextColor(fontColor);
			text.setGravity(Gravity.CENTER);
			text.setPadding(5, 5, 5, 5);
			ImageView img = new ImageView(this.mContext);
			img.setBackgroundResource(resID[position]);
			result.addView(img, new LinearLayout.LayoutParams(new LayoutParams(
					LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)));
			result.addView(text);
			return result;
		}

		public View getView(int position, View convertView, ViewGroup parent) {
			return makeMenyBody(position);
		}
	}

	/**
	 * 自定义Adapter,TabMenu的分页标签部分
	 * 
	 */
	static public class MenuTitleAdapter extends BaseAdapter {
		private Context mContext;
		private int fontColor, unselcolor, selcolor;
		private TextView[] title;

		/**
		 * 设置TabMenu的title
		 * 
		 * @param context
		 *            调用方的上下文
		 * @param titles
		 *            分页标签的字符串数组
		 * @param fontSize
		 *            字体大小
		 * @param fontcolor
		 *            字体颜色
		 * @param unselcolor
		 *            未选中项的背景色
		 * @param selcolor
		 *            选中项的背景色
		 */
		public MenuTitleAdapter(Context context, String[] titles, int fontSize,
				int fontcolor, int unselcolor, int selcolor) {
			this.mContext = context;
			this.fontColor = fontcolor;
			this.unselcolor = unselcolor;
			this.selcolor = selcolor;
			this.title = new TextView[titles.length];
			for (int i = 0; i < titles.length; i++) {
				title[i] = new TextView(mContext);
				title[i].setText(titles[i]);
				title[i].setTextSize(fontSize);
				title[i].setTextColor(fontColor);
				title[i].setGravity(Gravity.CENTER);
				title[i].setPadding(10, 10, 10, 10);
			}
		}

		public int getCount() {
			return title.length;
		}

		public Object getItem(int position) {
			return title[position];
		}

		public long getItemId(int position) {
			return title[position].getId();
		}

		/**
		 * 设置选中的效果
		 */
		private void SetFocus(int index) {
			for (int i = 0; i < title.length; i++) {
				if (i != index) {
					title[i].setBackgroundDrawable(new ColorDrawable(unselcolor));// 设置没选中的颜色
					title[i].setTextColor(fontColor);// 设置没选中项的字体颜色
				}
			}
			title[index].setBackgroundColor(0x00);// 设置选中项的颜色
			title[index].setTextColor(selcolor);// 设置选中项的字体颜色
		}

		public View getView(int position, View convertView, ViewGroup parent) {
			View v;
			if (convertView == null) {
				v = title[position];
			} else {
				v = convertView;
			}
			return v;
		}
	}
}

testTabMenu介绍了数据的定义以及TabMenu的使用，源码如下：

package com.iaiai.activity;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;

/**
 * 
 * <p>
 * Title: MainMenuView.java
 * </p>
 * <p>
 * E-Mail: [e-mail]
 * </p>
 * <p>
 * QQ: 176291935
 * </p>
 * <p>
 * Http: iaiai.iteye.com
 * </p>
 * <p>
 * Create time: 2011-8-17
 * </p>
 * 
 * @author 丸子
 * @version 0.0.1
 */
public class MainMenuView extends Activity {
	TabMenu.MenuBodyAdapter[] bodyAdapter = new TabMenu.MenuBodyAdapter[3];
	TabMenu.MenuTitleAdapter titleAdapter;
	TabMenu tabMenu;
	int selTitle = 0;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		// 设置分页栏的标题
		titleAdapter = new TabMenu.MenuTitleAdapter(this, new String[] { "常用",
				"设置", "工具" }, 16, 0xFF222222, Color.LTGRAY, Color.WHITE);
		// 定义每项分页栏的内容
		bodyAdapter[0] = new TabMenu.MenuBodyAdapter(this, new String[] {
				"常用1", "常用2", }, new int[] { R.drawable.menu_test,
				R.drawable.menu_bookmark }, 13, 0xFFFFFFFF);

		bodyAdapter[1] = new TabMenu.MenuBodyAdapter(this, new String[] {
				"设置1", "设置2", "设置3" }, new int[] { R.drawable.menu_edit,
				R.drawable.menu_delete, R.drawable.menu_fullscreen }, 13,
				0xFFFFFFFF);

		bodyAdapter[2] = new TabMenu.MenuBodyAdapter(this, new String[] {
				"工具1", "工具2", "工具3", "工具4" }, new int[] { R.drawable.menu_copy,
				R.drawable.menu_cut, R.drawable.menu_normalmode,
				R.drawable.menu_quit }, 13, 0xFFFFFFFF);

		tabMenu = new TabMenu(this, new TitleClickEvent(),
				new BodyClickEvent(), titleAdapter, 0x55123456,// TabMenu的背景颜色
				R.style.PopupAnimation);// 出现与消失的动画

		tabMenu.update();
		tabMenu.SetTitleSelect(0);
		tabMenu.SetBodyAdapter(bodyAdapter[0]);
	}

	class TitleClickEvent implements OnItemClickListener {
		@Override
		public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
				long arg3) {
			selTitle = arg2;
			tabMenu.SetTitleSelect(arg2);
			tabMenu.SetBodyAdapter(bodyAdapter[arg2]);
		}
	}

	class BodyClickEvent implements OnItemClickListener {
		@Override
		public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
				long arg3) {
			tabMenu.SetBodySelect(arg2, Color.GRAY);
			String str = "第" + String.valueOf(selTitle) + "栏\n\r" + "第"
					+ String.valueOf(arg2) + "项";
			Toast.makeText(MainMenuView.this, str, 500).show();

		}

	}

	@Override
	/**  
	 * 创建MENU  
	 */
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add("menu");// 必须创建一项
		return super.onCreateOptionsMenu(menu);
	}

	@Override
	/**  
	 * 拦截MENU  
	 */
	public boolean onMenuOpened(int featureId, Menu menu) {
		if (tabMenu != null) {
			if (tabMenu.isShowing())
				tabMenu.dismiss();
			else {
				tabMenu.showAtLocation(findViewById(R.id.LinearLayout01),
						Gravity.BOTTOM, 0, 0);
			}
		}
		return false;// 返回为true 则显示系统menu
	}
}