本文实例讲述了Android实现扩展Menu的方法。分享给大家供大家参考。具体如下：
1. java代码：
package com.tabmenu; 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; /**可扩展menu * * @author antking **/ 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; } } }
2. java代码：
package com.tabmenu; 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; /** * 活动界面 * @author wei * */ public class Activity01 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[] { android.R.drawable.alert_dark_frame, android.R.drawable.ic_delete},13, 0xFFFFFFFF); bodyAdapter[1]=new TabMenu.MenuBodyAdapter(this,new String[] { "设置1", "设置2", "设置3"}, new int[] { android.R.drawable.ic_menu_edit, android.R.drawable.btn_default,android.R.drawable.btn_dropdown},13, 0xFFFFFFFF); bodyAdapter[2]=new TabMenu.MenuBodyAdapter(this,new String[] { "工具1", "工具2", "工具3", "工具4" }, new int[] { android.R.drawable.ic_media_ff, android.R.drawable.ic_menu_delete, android.R.drawable.ic_btn_speak_now, android.R.drawable.edit_text },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(Activity01.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 } }
3. 运行结果：
希望本文所述对大家的Android程序设计有所帮助。