Android提高第十八篇之自定义PopupWindow实现的Menu(TabMenu)

http://blog.csdn.net/hellogv/archive/2011/01/28/6168439.aspx
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      }        }