private void iniPopupWindow() {

  LayoutInflater inflater = (LayoutInflater) this .getSystemService(LAYOUT_INFLATER_SERVICE);
  View layout = inflater.inflate(R.layout.task_detail_popupwindow, null);
  pwMyPopWindow = new PopupWindow(layout);
  pwMyPopWindow.setFocusable(true);// 加上这个popupwindow中的ListView才可以接收点击事件

  lvPopupList.setAdapter();

  // 控制popupwindow点击屏幕其他地方消失
  pwMyPopWindow.setBackgroundDrawable(this.getResources().getDrawable(
    R.drawable.bg_popupwindow));// 设置背景图片，不能在布局中设置，要通过代码来设置
  pwMyPopWindow.setOutsideTouchable(true);// 触摸popupwindow外部，popupwindow消失。这个要求你的popupwindow要有背景图片才可以成功，如上

// 更多操作按钮
  ibOperationMore = (ImageButton) findViewById(R.id.ib_operate_more);
  ibOperationMore.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {

    if (pwMyPopWindow.isShowing()) {

          pwMyPopWindow.dismiss();// 关闭
    } else {

     pwMyPopWindow.showAsDropDown(ibOperationMore);// 显示
    }

   }
  });

popupwindow popupmenu