仿UCWEB菜单功能

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：

<?xmlversion="1.0"encoding="utf-8"?>
<setxmlns:android="http://schemas.android.com/apk/res/android">
<translateandroid:fromYDelta="100%p"android:toYDelta="0"android:duration="1000"/>
<alphaandroid:fromAlpha="0.0"android:toAlpha="1.0"android:duration="1000"/>
</set>

新建文件popup_exit.xml：

<?xmlversion="1.0"encoding="utf-8"?>
<setxmlns:android="http://schemas.android.com/apk/res/android">
<translateandroid:fromYDelta="0"android:toYDelta="100%p"android:duration="1000"/>
<alphaandroid: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：

<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutandroid:id="@+id/LinearLayout01"
android:layout_width="fill_parent"android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextViewandroid: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：

packagecom.testTabMenu;
importandroid.content.Context;
importandroid.graphics.Color;
importandroid.graphics.drawable.ColorDrawable;
importandroid.view.Gravity;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.BaseAdapter;
importandroid.widget.GridView;
importandroid.widget.ImageView;
importandroid.widget.LinearLayout;
importandroid.widget.PopupWindow;
importandroid.widget.TextView;
importandroid.widget.AdapterView.OnItemClickListener;
importandroid.widget.LinearLayout.LayoutParams;
publicclassTabMenuextendsPopupWindow{
privateGridViewgvBody,gvTitle;
privateLinearLayoutmLayout;
privateMenuTitleAdaptertitleAdapter;
publicTabMenu(Contextcontext,OnItemClickListenertitleClick,OnItemClickListenerbodyClick,
MenuTitleAdaptertitleAdapter,intcolorBgTabMenu,intaniTabMenu){
super(context);

mLayout=newLinearLayout(context);
mLayout.setOrientation(LinearLayout.VERTICAL);
//标题选项栏
gvTitle=newGridView(context);
gvTitle.setLayoutParams(newLayoutParams(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(newColorDrawable(Color.TRANSPARENT));//选中的时候为透明色
this.titleAdapter=titleAdapter;
//子选项栏
gvBody=newGridView(context);
gvBody.setLayoutParams(newLayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
gvBody.setSelector(newColorDrawable(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(newColorDrawable(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
}


publicvoidSetTitleSelect(intindex)
{
gvTitle.setSelection(index);
this.titleAdapter.SetFocus(index);
}

publicvoidSetBodySelect(intindex,intcolorSelBody)
{
intcount=gvBody.getChildCount();
for(inti=0;i<count;i++)
{
if(i!=index)
((LinearLayout)gvBody.getChildAt(i)).setBackgroundColor(Color.TRANSPARENT);
}
((LinearLayout)gvBody.getChildAt(index)).setBackgroundColor(colorSelBody);
}

publicvoidSetBodyAdapter(MenuBodyAdapterbodyAdapter)
{
gvBody.setAdapter(bodyAdapter);
}

/**
*自定义Adapter，TabMenu的每个分页的主体
*
*/
staticpublicclassMenuBodyAdapterextendsBaseAdapter{
privateContextmContext;
privateintfontColor,fontSize;
privateString[]texts;
privateint[]resID;
/**
*设置TabMenu的分页主体
*@paramcontext调用方的上下文
*@paramtexts按钮集合的字符串数组
*@paramresID按钮集合的图标资源数组
*@paramfontSize按钮字体大小
*@paramcolor按钮字体颜色
*/
publicMenuBodyAdapter(Contextcontext,String[]texts,int[]resID,intfontSize,intfontColor)
{
this.mContext=context;
this.fontColor=fontColor;
this.texts=texts;
this.fontSize=fontSize;
this.resID=resID;
}
publicintgetCount(){
returntexts.length;
}
publicObjectgetItem(intposition){

returnmakeMenyBody(position);
}
publiclonggetItemId(intposition){
returnposition;
}

privateLinearLayoutmakeMenyBody(intposition)
{
LinearLayoutresult=newLinearLayout(this.mContext);
result.setOrientation(LinearLayout.VERTICAL);
result.setGravity(Gravity.CENTER_HORIZONTAL|Gravity.CENTER_VERTICAL);
result.setPadding(10,10,10,10);

TextViewtext=newTextView(this.mContext);
text.setText(texts[position]);
text.setTextSize(fontSize);
text.setTextColor(fontColor);
text.setGravity(Gravity.CENTER);
text.setPadding(5,5,5,5);
ImageViewimg=newImageView(this.mContext);
img.setBackgroundResource(resID[position]);
result.addView(img,newLinearLayout.LayoutParams(newLayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT)));
result.addView(text);
returnresult;
}

publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
returnmakeMenyBody(position);
}
}


/**
*自定义Adapter,TabMenu的分页标签部分
*
*/
staticpublicclassMenuTitleAdapterextendsBaseAdapter{
privateContextmContext;
privateintfontColor,unselcolor,selcolor;
privateTextView[]title;
/**
*设置TabMenu的title
*@paramcontext调用方的上下文
*@paramtitles分页标签的字符串数组
*@paramfontSize字体大小
*@paramfontcolor字体颜色
*@paramunselcolor未选中项的背景色
*@paramselcolor选中项的背景色
*/
publicMenuTitleAdapter(Contextcontext,String[]titles,intfontSize,
intfontcolor,intunselcolor,intselcolor){
this.mContext=context;
this.fontColor=fontcolor;
this.unselcolor=unselcolor;
this.selcolor=selcolor;
this.title=newTextView[titles.length];
for(inti=0;i<titles.length;i++){
title[i]=newTextView(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);
}
}
publicintgetCount(){
returntitle.length;
}
publicObjectgetItem(intposition){
returntitle[position];
}
publiclonggetItemId(intposition){
returntitle[position].getId();
}
/**
*设置选中的效果
*/
privatevoidSetFocus(intindex)
{
for(inti=0;i<title.length;i++)
{
if(i!=index)
{
title[i].setBackgroundDrawable(newColorDrawable(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
}

publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
Viewv;
if(convertView==null){
v=title[position];
}else{
v=convertView;
}
returnv;
}
}
}

testTabMenu介绍了数据的定义以及TabMenu的使用，源码如下：

packagecom.testTabMenu;
importandroid.app.Activity;
importandroid.graphics.Color;
importandroid.os.Bundle;
importandroid.view.Gravity;
importandroid.view.Menu;
importandroid.view.View;
importandroid.widget.AdapterView;
importandroid.widget.AdapterView.OnItemClickListener;
importandroid.widget.Toast;
publicclasstestTabMenuextendsActivity{
TabMenu.MenuBodyAdapter[]bodyAdapter=newTabMenu.MenuBodyAdapter[3];
TabMenu.MenuTitleAdaptertitleAdapter;
TabMenutabMenu;
intselTitle=0;
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//设置分页栏的标题
titleAdapter=newTabMenu.MenuTitleAdapter(this,newString[]{"常用",
"设置","工具"},16,0xFF222222,Color.LTGRAY,Color.WHITE);
//定义每项分页栏的内容
bodyAdapter[0]=newTabMenu.MenuBodyAdapter(this,newString[]{"常用1","常用2",},
newint[]{R.drawable.menu_test,
R.drawable.menu_bookmark},13,0xFFFFFFFF);

bodyAdapter[1]=newTabMenu.MenuBodyAdapter(this,newString[]{"设置1","设置2",
"设置3"},newint[]{R.drawable.menu_edit,
R.drawable.menu_delete,R.drawable.menu_fullscreen},13,0xFFFFFFFF);

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


tabMenu=newTabMenu(this,
newTitleClickEvent(),
newBodyClickEvent(),
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]);
}

classTitleClickEventimplementsOnItemClickListener{
@Override
publicvoidonItemClick(AdapterView<?>arg0,Viewarg1,intarg2,
longarg3){
selTitle=arg2;
tabMenu.SetTitleSelect(arg2);
tabMenu.SetBodyAdapter(bodyAdapter[arg2]);
}
}

classBodyClickEventimplementsOnItemClickListener{
@Override
publicvoidonItemClick(AdapterView<?>arg0,Viewarg1,intarg2,
longarg3){
tabMenu.SetBodySelect(arg2,Color.GRAY);
Stringstr="第"+String.valueOf(selTitle)+"栏/n/r"
+"第"+String.valueOf(arg2)+"项";
Toast.makeText(testTabMenu.this,str,500).show();

}

}
@Override
/**
*创建MENU
*/
publicbooleanonCreateOptionsMenu(Menumenu){
menu.add("menu");//必须创建一项
returnsuper.onCreateOptionsMenu(menu);
}
@Override
/**
*拦截MENU
*/
publicbooleanonMenuOpened(intfeatureId,Menumenu){
if(tabMenu!=null){
if(tabMenu.isShowing())
tabMenu.dismiss();
else{
tabMenu.showAtLocation(findViewById(R.id.LinearLayout01),
Gravity.BOTTOM,0,0);
}
}
returnfalse;//返回为true则显示系统menu
}

}