一般使用過UCWEB-Android版的人都應該對其特殊的menu有一定的印象，把menu做成Tab-Menu(支持分頁的Menu)，可以容納比Android傳統的menu更豐富的內容(Android的menu超過6項則縮略在[更多]里)，本文參考網上的例子的基礎上對例子進行簡化以及封裝，使其作為一個復合控件融入自己的framework。
先來看看本文程序運行的效果如下圖所示：
TabMenu本身就是一個PopupWindow，PopupWindow上面放了兩個GridView,第一個GridView就是分頁標簽，位于PopupWindow的頂部，第二個GridView是菜單，位于PopupWindow的主體。為了實現PopupWindow的彈出/退出的動畫效果，本文使用了以下代碼：
在工程的res文件夾里添加anim子目錄，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文件夾里新建文件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的源碼如下：
<?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="擴展Menu----hellogv"></TextView></LinearLayout>
TabMenu的封裝類TabMenu.java的源碼如下：
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); //標題選項欄 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));//選中的時候為透明色 this.titleAdapter=titleAdapter; //子選項欄 gvBody = new GridView(context); gvBody.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT)); gvBody.setSelector(new ColorDrawable(Color.TRANSPARENT));//選中的時候為透明色 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); //設置默認項 this.setContentView(mLayout); this.setWidth(LayoutParams.FILL_PARENT); this.setHeight(LayoutParams.WRAP_CONTENT); this.setBackgroundDrawable(new ColorDrawable(colorBgTabMenu));// 設置TabMenu菜單背景 this.setAnimationStyle(aniTabMenu); this.setFocusable(true);// menu菜單獲得焦點 如果沒有獲得焦點menu菜單中的控件事件無法響應 } 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); } /** * 自定義Adapter，TabMenu的每個分頁的主體 * */ static public class MenuBodyAdapter extends BaseAdapter { private Context mContext; private int fontColor,fontSize; private String[] texts; private int[] resID; /** * 設置TabMenu的分頁主體 * @param context 調用方的上下文 * @param texts 按鈕集合的字符串數組 * @param resID 按鈕集合的圖標資源數組 * @param fontSize 按鈕字體大小 * @param color 按鈕字體顏色 */ 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); } } /** * 自定義Adapter,TabMenu的分頁標簽部分 * */ static public class MenuTitleAdapter extends BaseAdapter { private Context mContext; private int fontColor,unselcolor,selcolor; private TextView[] title; /** * 設置TabMenu的title * @param context 調用方的上下文 * @param titles 分頁標簽的字符串數組 * @param fontSize 字體大小 * @param fontcolor 字體顏色 * @param unselcolor 未選中項的背景色 * @param selcolor 選中項的背景色 */ 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(); } /** * 設置選中的效果 */ private void SetFocus(int index) { for(int i=0;i<title.length;i++) { if(i!=index) { title[i].setBackgroundDrawable(new ColorDrawable(unselcolor));//設置沒選中的顏色 title[i].setTextColor(fontColor);//設置沒選中項的字體顏色 } } title[index].setBackgroundColor(0x00);//設置選中項的顏色 title[index].setTextColor(selcolor);//設置選中項的字體顏色 } public View getView(int position, View convertView, ViewGroup parent) { View v; if (convertView == null) { v = title[position]; } else { v = convertView; } return v; } }}testTabMenu介紹了數據的定義以及TabMenu的使用，源碼如下：
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); //設置分頁欄的標題 titleAdapter = new TabMenu.MenuTitleAdapter(this, new String[] { "常用", "設置", "工具" }, 16, 0xFF222222,Color.LTGRAY,Color.WHITE); //定義每項分頁欄的內容 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[] { "設置1", "設置2", "設置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的背景顏色 R.style.PopupAnimation);//出現與消失的動畫 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)+"欄/n/r" +"第"+String.valueOf(arg2)+"項"; Toast.makeText(testTabMenu.this, str, 500).show(); } } @Override /** * 創建MENU */ public boolean onCreateOptionsMenu(Menu menu) { menu.add("menu");// 必須創建一項 return super.onCreateOptionsMenu(menu); } @Override /** * 攔截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;// 返回為true 則顯示系統menu }}感興趣的讀者可以自己動手測試一下本文所述實例，相信會對大家的Android程序開發有一定幫助。
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