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 stub
return this.menuImg.length;
}

public Object getItem(int position) {
// TODO Auto-generated method stub
return this.menuImg[position];
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}

@Override
public 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);
}
}

@Override
public int getCount() {
return this.menuTitle.length;
}

@Override
public Object getItem(int position) {
return this.menuTitle[position];
}

@Override
public long getItemId(int position) {
return this.menuTitle[position].getId();
}

@Override
public 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]) ;
}
}
@Override
public int getCount() {
return this.menuImg.length;
}

@Override
public Object getItem(int position) {
return this.menuImg[position];
}

@Override
public long getItemId(int position) {
return this.menuImg[position].getId();
}

@Override
public 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 ;

@Override
public 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 {

@Override
public 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() {

@Override
public void onClick(DialogInterface dialog, int which) {
PopMenuActivity.this.finish() ;
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
PopMenuActivity.this.switchActivity(0);
}
}).create();

dialog.show();
}

@Override
public 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 implements
OnItemClickListener {

@Override
public 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 {

@Override
public 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。