Android提高十八篇之自定义Menu(TabMenu)

本文来自http://blog.csdn.net/hellogv/ ，引用必须注明出处！

快要过年了，在这里先祝广大的技术宅兔年快乐！
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(作者:CoffeeCole,email:[e-mail]),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----hellogv"></TextView>
</LinearLayout>

TabMenu的封装类TabMenu.java的源码如下：

package com.testTabMenu;
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;
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.testTabMenu;
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;
public class testTabMenu 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(testTabMenu.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
	}
	
}