1 . 初始化数据private void fillData() {        ll_loading.setVisibility(View.VISIBLE);     // 显示进度        new Thread() {            public void run() {                appInfos = AppInfoProvider.getAppInfos(AppManagerActivity.this);      //得到所有的应用程序                userAppInfos = new ArrayList<AppInfo>();      //userAppinfos用户的应用程序                    systemAppInfos = new ArrayList<AppInfo>();        //systemAppInfos系统的应用程序                for (AppInfo info : appInfos) {      //遍历出所有的应用程序                    if (info.isUserApp()) {                        userAppInfos.add(info);                    } else {                        systemAppInfos.add(info);                    }                }                // 加载listview的数据适配器                runOnUiThread(new Runnable() {     // UI更新界面                    @Override                    public void run() {                        if (adapter == null) {                            adapter = new AppManagerAdapter();    // Adapter                            lv_app_manager.setAdapter(adapter);                        } else {                            adapter.notifyDataSetChanged();                        }                        ll_loading.setVisibility(View.INVISIBLE);   // 隐藏进度                    }                });            };        }.start();}

2. private class AppManagerAdapter extends BaseAdapter {        // 控制listview有多少个条目        @Override        public int getCount() {            // return appInfos.size();            return userAppInfos.size() + 1 + systemAppInfos.size() + 1;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            AppInfo appInfo;            if (position == 0) {// 显示的是用程序有多少个的小标签                TextView tv = new TextView(getApplicationContext());                tv.setTextColor(Color.WHITE);                tv.setBackgroundColor(Color.GRAY);                tv.setText("用户程序：" + userAppInfos.size() + "个");                return tv;            } else if (position == (userAppInfos.size() + 1)) {                TextView tv = new TextView(getApplicationContext());                tv.setTextColor(Color.WHITE);                tv.setBackgroundColor(Color.GRAY);                tv.setText("系统程序：" + systemAppInfos.size() + "个");                return tv;            } else if (position <= userAppInfos.size()) {// 用户程序                int newposition = position - 1;// 因为多了一个textview的文本占用了位置                appInfo = userAppInfos.get(newposition);            } else {// 系统程序                int newposition = position - 1 - userAppInfos.size() - 1;                appInfo = systemAppInfos.get(newposition);            }            View view;            ViewHolder holder;            // if(position<userAppInfos.size()){//这些位置是留个用户程序显示的。            // appInfo = userAppInfos.get(position);            // }else{//这些位置是留个系统程序的。            // int newposition = position - userAppInfos.size();            // appInfo = systemAppInfos.get(newposition);            // }            if (convertView != null && convertView instanceof RelativeLayout) {                // 不仅需要检查是否为空，还要判断是否是合适的类型去复用                view = convertView;                holder = (ViewHolder) view.getTag();            } else {                view = View.inflate(getApplicationContext(),                        R.layout.list_item_appinfo, null);                holder = new ViewHolder();                holder.iv_icon = (ImageView) view                        .findViewById(R.id.iv_app_icon);                holder.tv_location = (TextView) view                        .findViewById(R.id.tv_app_location);                holder.tv_name = (TextView) view.findViewById(R.id.tv_app_name);                holder.iv_status = (ImageView) view.findViewById(R.id.iv_status);                view.setTag(holder);            }            holder.iv_icon.setImageDrawable(appInfo.getIcon());            holder.tv_name.setText(appInfo.getName());            if (appInfo.isInRom()) {                holder.tv_location.setText("手机内存");            } else {                holder.tv_location.setText("外部存储");            }            if(dao.find(appInfo.getPackname())){                holder.iv_status.setImageResource(R.drawable.lock);            }else{                holder.iv_status.setImageResource(R.drawable.unlock);            }            return view;        }        @Override        public Object getItem(int position) {            return null;        }        @Override        public long getItemId(int position) {            return 0;        }}    static class ViewHolder {        TextView tv_name;        TextView tv_location;        ImageView iv_icon;        ImageView iv_status;    }

3// 给listview注册一个滚动的监听器lv_app_manager.setOnScrollListener(new OnScrollListener() {            @Override            public void onScrollStateChanged(AbsListView view, int scrollState) {            }            // 滚动的时候调用的方法。            // firstVisibleItem 第一个可见条目在listview集合里面的位置。            @Override            public void onScroll(AbsListView view, int firstVisibleItem,                    int visibleItemCount, int totalItemCount) {                dismissPopupWindow();                if (userAppInfos != null && systemAppInfos != null) {                    if (firstVisibleItem > userAppInfos.size()) {                        tv_status.setText("系统程序：" + systemAppInfos.size() + "个");      //list分类显示出:系统程序                    } else {                        tv_status.setText("用户程序：" + userAppInfos.size() + "个");    //list分类显示出:用户程序                    }                }            }});

附录:<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/textView1"        android:layout_width="fill_parent"        android:layout_height="55dip"        android:background="#8866ff00"        android:gravity="center"        android:text="软件管理器"        android:textColor="#000000"        android:textSize="22sp" />    <RelativeLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content" >        <TextView            android:id="@+id/tv_avail_rom"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="内存可用："            android:textColor="#000000" />        <TextView            android:id="@+id/tv_avail_sd"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:text="SD卡可用："            android:textColor="#000000" />    </RelativeLayout>    <FrameLayout        android:layout_width="fill_parent"        android:layout_height="fill_parent" >        <LinearLayout            android:id="@+id/ll_loading"            android:layout_width="fill_parent"            android:layout_height="fill_parent"            android:gravity="center"            android:orientation="vertical"            android:visibility="invisible" >            <ProgressBar                android:layout_width="wrap_content"                android:layout_height="wrap_content" />            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="正在加载程序信息..." />        </LinearLayout>        <ListView            android:id="@+id/lv_app_manager"            android:layout_width="fill_parent"            android:layout_height="fill_parent"            android:fastScrollEnabled="true"            android:overScrollMode="never" >        </ListView>        <TextView            android:id="@+id/tv_status"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:background="#ff888888"            android:text="用户程序：6个"            android:textColor="#ffffff" />    </FrameLayout></LinearLayout>