private void initSharePopupWindow(View parent) {
		PopupWindow sharePopupWindow = null;
		View view = null;
		ListView shareList = null;
		if(null == sharePopupWindow) {
			//載入佈局檔案
			view = LayoutInflater.from(DetailExchangeActivity.this).inflate(R.layout.popup_share, null);
			shareList = (ListView) view.findViewById(R.id.share_list);
			List<AppInfo> shareAppInfos = getShareAppList();
			final ShareCustomAdapter adapter = new ShareCustomAdapter(mContext, shareAppInfos);
			shareList.setAdapter(adapter);
			
			shareList.setOnItemClickListener(new OnItemClickListener() {

				@Override
				public void onItemClick(AdapterView<?> parent, View view,
						int position, long id) {
					// TODO Auto-generated method stub
					Intent shareIntent = new Intent(Intent.ACTION_SEND);
					AppInfo appInfo = (AppInfo) adapter.getItem(position);
					shareIntent.setComponent(new ComponentName(appInfo.getAppPkgName(), appInfo.getAppLauncherClassName()));
					shareIntent.setType("text/plain");
//					shareIntent.setType("*/*");
					//這裡就是組織內容了，
					shareIntent.putExtra(Intent.EXTRA_TEXT, "測試，這裡傳送推廣地址");
					shareIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
					DetailExchangeActivity.this.startActivity(shareIntent);
				}
			});
			
			sharePopupWindow = new PopupWindow(view, 
					(int)(160 * density), LinearLayout.LayoutParams.WRAP_CONTENT);
		}
		//使其聚焦
		sharePopupWindow.setFocusable(true);
		//設定允許在外點選消失
		sharePopupWindow.setOutsideTouchable(true);
		// 這個是為了點選“返回Back”也能使其消失，並且並不會影響你的背景
		sharePopupWindow.setBackgroundDrawable(new BitmapDrawable());
		//xoff,yoff基於anchor的左下角進行偏移。正數表示下方右邊，負數表示（上方左邊）
		//showAsDropDown(parent, xPos, yPos);
		sharePopupWindow.showAsDropDown(parent, -5, 5);
	}