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: [email protected] * </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: [email protected] * </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 }}