ActivityGroup的使用

ActivityGroup是Activity的子类，在Activity的基础上还扩充了一些东西，如可以让多个Activity程序在同一界面上运行且互不干扰。这种功能在menu比较多的地方使用起来会很方便，用途也很广泛。下面是自己整理的一些代码供大家学习使用。

1.一般来说菜单一般都包含图片，实现这种功能一般都会用到适配器，该适配器继承BaseAdapter,代码如下

package org.lxh.activity;import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;public class MenuImageAdapter extends BaseAdapter{private Context context;//所有标签的图片显示private ImageView[] menuImg;//选中的ImageView索引private int selectedMenuImg;public MenuImageAdapter(Context context,int imgIds[],int width,int height,int selectedMenuImg){this.context=context;this.selectedMenuImg=selectedMenuImg;this.menuImg=new ImageView[imgIds.length];for(int x=0;x<imgIds.length;x++){//实例化ImageView对象this.menuImg[x]=new ImageView(this.context);//定义图片的布局参数this.menuImg[x].setLayoutParams(new GridView.LayoutParams(width,height));this.menuImg[x].setAdjustViewBounds(false);this.menuImg[x].setPadding(3, 3, 3, 3);this.menuImg[x].setImageResource(imgIds[x]);}}public int getCount() {// TODO Auto-generated method stubreturn this.menuImg.length;}public Object getItem(int position) {// TODO Auto-generated method stubreturn this.menuImg[position];}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn 0;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ImageView imgView=null;if(imgView==null){imgView=this.menuImg[position];}else{imgView=(ImageView)convertView;}return imgView;}public void setFocus(int selid){for(int x=0;x<this.menuImg.length;x++){if(x!=selid){this.menuImg[x].setBackgroundResource(0);}}this.menuImg[selid].setBackgroundResource(this.selectedMenuImg);}
}

到这里第一个适配器就好了，下面为了把功能做好一些，顺便加个弹出菜单，该菜单包含标题和内容。此类弹出菜单也需要写适配器，分别是标题适配器，内容适配器。标题适配器比较简单，只需做一下点击的效果和标题内容的显示就OK，代码如下

package org.lxh.activity;import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;public class PopupMenuTitleAdapter extends BaseAdapter {private TextView menuTitle[] = null; // 文字显示组件private int fontColor;private int selectedColor;private int unSelectedColor;public PopupMenuTitleAdapter(Context context, int[] titleIds,int fontColor, int fontSize, int selectedColor, int unSelectedColor) {this.fontColor = fontColor;this.selectedColor = selectedColor;this.unSelectedColor = unSelectedColor;this.menuTitle = new TextView[titleIds.length];for (int x = 0; x < titleIds.length; x++) {this.menuTitle[x] = new TextView(context);this.menuTitle[x].setText(titleIds[x]);this.menuTitle[x].setTextSize(fontSize);this.menuTitle[x].setGravity(Gravity.CENTER);this.menuTitle[x].setPadding(10, 10, 10, 10);}}@Overridepublic int getCount() {return this.menuTitle.length;}@Overridepublic Object getItem(int position) {return this.menuTitle[position];}@Overridepublic long getItemId(int position) {return this.menuTitle[position].getId();}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {View view = null;if (convertView == null) {view = this.menuTitle[position];} else {view = convertView;}return view;}public void setFocus(int index) {for (int x = 0; x < this.menuTitle.length; x++) {if (x != index) {this.menuTitle[x].setBackgroundDrawable(new ColorDrawable(this.unSelectedColor));this.menuTitle[x].setTextColor(fontColor);}}this.menuTitle[index].setBackgroundColor(0x00);this.menuTitle[index].setTextColor(this.selectedColor);}
}

下面是弹出菜单的内容适配器，里面包含了多个Activity.

package org.lxh.activity;import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;public class PopupMenuBodyAdapter extends BaseAdapter {private ImageView[] menuImg = null ;public PopupMenuBodyAdapter(Context context, int [] picIds) {this.menuImg = new ImageView[picIds.length];for (int x = 0; x < this.menuImg.length; x++) {this.menuImg[x] = new ImageView(context) ;this.menuImg[x].setImageResource(picIds[x]) ;}}@Overridepublic int getCount() {return this.menuImg.length;}@Overridepublic Object getItem(int position) {return this.menuImg[position];}@Overridepublic long getItemId(int position) {return this.menuImg[position].getId();}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {View view = null ;if (convertView == null) {view = this.menuImg[position];} else {view = convertView;}return view;}}

2.之后便是标题和内容的顶层了，这一层就是PopupMenu了，这个弹出菜单就包含了标题和内容

package org.lxh.activity;import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;public class PopMenu extends PopupWindow {private GridView popTitle ; // 表示标题private GridView popBody ;   // 标题主体private PopupMenuTitleAdapter titleAdapter = null ;private LinearLayout layout = null ;public PopMenu(Context context, int titleIds[],int backgroundColor,OnItemClickListener titleCallback, OnItemClickListener bodyCallback) {super(context); // 还是需要创建弹出的组件this.titleAdapter = new PopupMenuTitleAdapter(context, titleIds,0xFF222222, 16, Color.LTGRAY, Color.WHITE);this.layout = new LinearLayout(context) ;this.layout.setOrientation(LinearLayout.VERTICAL) ;this.popTitle = new GridView(context);this.popTitle.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); this.popTitle.setNumColumns(titleIds.length) ;this.popTitle.setHorizontalSpacing(1) ;this.popTitle.setVerticalSpacing(1) ;this.popTitle.setStretchMode(GridView.STRETCH_COLUMN_WIDTH); // 拉申列宽this.popTitle.setAdapter(this.titleAdapter) ;this.popTitle.setOnItemClickListener(titleCallback) ;this.popBody = new GridView(context) ;this.popBody.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));this.popBody.setNumColumns(5) ;this.popBody.setHorizontalSpacing(1) ;this.popBody.setVerticalSpacing(1) ;this.popBody.setPadding(10, 10, 10, 10) ;this.popBody.setGravity(Gravity.CENTER) ;this.popBody.setStretchMode(GridView.STRETCH_COLUMN_WIDTH); // 拉申列宽this.popBody.setOnItemClickListener(bodyCallback) ;this.layout.addView(this.popTitle) ;this.layout.addView(this.popBody) ;super.setContentView(this.layout) ;super.setWidth(LayoutParams.FILL_PARENT) ;super.setHeight(LayoutParams.WRAP_CONTENT) ;super.setBackgroundDrawable(new ColorDrawable(backgroundColor)) ;super.setFocusable(true) ; // 允许获得焦点}public void setPopupMenuBodyAdapter(PopupMenuBodyAdapter adapter) {this.popBody.setAdapter(adapter) ;}public void setPopTitleSelected(int postion) {this.popTitle.setSelection(postion) ;this.titleAdapter.setFocus(postion) ;}public void setPopBodySelected(int position,int selectedColor) {   // 设置选中后的颜色int count = this.popBody.getChildCount() ;for (int x = 0; x < count; x++) {if (x != position) {ImageView img = (ImageView) this.popBody.getChildAt(x) ;img.setBackgroundColor(Color.TRANSPARENT) ;}}ImageView img = (ImageView) this.popBody.getChildAt(position) ;img.setBackgroundColor(selectedColor) ;}
}

这里呢顺便加了点击效果，点击后背景变为灰色

3.后面就是主要的activity了。此时我们需要显示一个菜单，之后给第四个菜单加弹出式菜单，并在弹出菜单切换程序

package org.lxh.activity;import android.app.ActivityGroup;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.Toast;public class PopMenuActivity extends ActivityGroup {private GridView gridviewToolbar; // 工具菜单栏private MenuImageAdapter menu = null; // 图片适配器private LinearLayout content = null; // 填充内容private int menu_img[] = new int[] { R.drawable.menu_main,R.drawable.menu_news, R.drawable.menu_sms, R.drawable.menu_more,R.drawable.menu_exit }; // 填充的图片的资源private int width = 0; // 求出平均的宽度private int height = 0; // 求出平均的高度，定位显示private Intent intent = null;private boolean isShow = false ;private int commonItemIds[] = new int[] { R.drawable.common_account,R.drawable.common_addmark, R.drawable.common_download,R.drawable.common_exit, R.drawable.common_fullscreen,R.drawable.common_history, R.drawable.common_night,R.drawable.common_refresh };private int setItemIds[] = new int[] { R.drawable.set_button,R.drawable.set_mode, R.drawable.set_nophoto,R.drawable.set_rotation, R.drawable.set_scroll,R.drawable.set_skin, R.drawable.set_system, R.drawable.set_time };private int totleItemids[] = new int[] { R.drawable.tool_back,R.drawable.tool_copy, R.drawable.tool_file, R.drawable.tool_help,R.drawable.tool_report, R.drawable.tool_report,R.drawable.tool_save, R.drawable.tool_share };private int titleIds[] = new int[] { R.string.popmenu_common,R.string.popmenu_set, R.string.popmenu_tool };private PopMenu popMenu = null ;private PopupMenuBodyAdapter commonAdapter = null ;private PopupMenuBodyAdapter setAdapter = null ;private PopupMenuBodyAdapter toolAdapter = null ;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);super.requestWindowFeature(Window.FEATURE_NO_TITLE); // 取消标题super.setContentView(R.layout.main);this.gridviewToolbar = (GridView) super.findViewById(R.id.gridviewbar);this.content = (LinearLayout) super.findViewById(R.id.content);// 定义工具栏的一些信息显示this.gridviewToolbar.setNumColumns(this.menu_img.length); // 求出可以保存的个数this.gridviewToolbar.setSelector(new ColorDrawable(Color.TRANSPARENT));this.gridviewToolbar.setGravity(Gravity.CENTER);this.gridviewToolbar.setVerticalSpacing(0);this.width = super.getWindowManager().getDefaultDisplay().getWidth()/ this.menu_img.length;this.height = super.getWindowManager().getDefaultDisplay().getHeight() / 8;this.menu = new MenuImageAdapter(this, this.menu_img, this.width,this.height, R.drawable.menu_selected);this.gridviewToolbar.setAdapter(this.menu);this.switchActivity(0); // 第一个被选中this.gridviewToolbar.setOnItemClickListener(new OnItemClickListenerImpl());this.popMenu = new PopMenu(this, this.titleIds, 0x55123456, new PopupTitleOnItemClickListenerCallback(),new PopupBodyOnItemClickListenerCallback());this.commonAdapter = new PopupMenuBodyAdapter(this, this.commonItemIds);this.setAdapter = new PopupMenuBodyAdapter(this, this.setItemIds);this.toolAdapter = new PopupMenuBodyAdapter(this, this.totleItemids);this.popMenu.setPopupMenuBodyAdapter(this.commonAdapter) ;this.popMenu.setPopTitleSelected(0) ;}private class OnItemClickListenerImpl implements OnItemClickListener {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {PopMenuActivity.this.switchActivity(position);}}private void switchActivity(int id) { // 切换选中的操作this.menu.setFocus(id); // 设置选中图片的背景this.content.removeAllViews(); // 删除所有的内容switch (id) {case 0:this.intent = new Intent(PopMenuActivity.this, MyActivity.class);break;case 1:this.intent = new Intent(PopMenuActivity.this, MyActivity.class);break;case 2:this.intent = new Intent(PopMenuActivity.this, MyActivity.class);break;case 3:this.showPopupMenu() ;break;case 4:this.exitDialog() ;return;}this.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);Window subActivity = super.getLocalActivityManager().startActivity("subActivity", this.intent);this.content.addView(subActivity.getDecorView(),LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);}private void exitDialog() {Dialog dialog = new AlertDialog.Builder(this).setIcon(R.drawable.pic_m).setTitle("程序退出？ ").setMessage("您确定要退出本程序吗？").setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {PopMenuActivity.this.finish() ;}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {PopMenuActivity.this.switchActivity(0);}}).create();dialog.show();}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode == KeyEvent.KEYCODE_BACK) {this.exitDialog() ;}return false ;}private void showPopupMenu() {if (this.isShow) { // 已经显示了this.popMenu.dismiss();this.isShow = false;} else {this.popMenu.showAtLocation(PopMenuActivity.this.gridviewToolbar, Gravity.BOTTOM,0, this.height);this.isShow = true;}}private class PopupBodyOnItemClickListenerCallback implementsOnItemClickListener {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {PopMenuActivity.this.popMenu.setPopBodySelected(position, Color.GRAY) ;Toast.makeText(PopMenuActivity.this, "执行选项 - " + position, Toast.LENGTH_SHORT).show() ;}}private class PopupTitleOnItemClickListenerCallback implements OnItemClickListener {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {PopMenuActivity.this.popMenu.setPopTitleSelected(position) ;switch(position) {case 0:PopMenuActivity.this.popMenu.setPopupMenuBodyAdapter(PopMenuActivity.this.commonAdapter);break;case 1:PopMenuActivity.this.popMenu.setPopupMenuBodyAdapter(PopMenuActivity.this.setAdapter);break;case 2:PopMenuActivity.this.popMenu.setPopupMenuBodyAdapter(PopMenuActivity.this.toolAdapter);break;}}}
}

到这里就大功告成了，下面是效果图

这些图片是我从教程里拿的，下面看看弹出菜单的效果。

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