Android提高十八篇之自定义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(作者:CoffeeCole,email:longkefan@foxmail.com),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：
新建文件popup_exit.xml：
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：
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：
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