android项目实战-背呗单词DEV05-主界面自定义menu

/**
  * 自定义menu，必须创建一项
  */
@Override
public boolean onCreateOptionsMenu(Menu menu) {
      menu.add("menu");
      return super.onCreateOptionsMenu(menu);
}

/**
  * 拦截menu
  * 返回false，则说明显示自定义menu
  */
 @Override
 public boolean onMenuOpened(int featureId, Menu menu) {
      if(customMenuPopupWindow != null) {
         if(customMenuPopupWindow.isShowing()) {
             customMenuPopupWindow.dismiss();
         } else {
             //显示窗口 
            //设置layout在PopupWindow中显示的位置
            customMenuPopupWindow.showAtLocation(
                   this.findViewById(R.id.todayTaskLinearLayout),
                   Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);
         }
      }
      return false;
}

/**
  * menu点击事件
  * 根据点击跳转
  */
  class BodyClickEvent implements OnItemClickListener {
      @Override
      public void onItemClick(AdapterView<?> adapterView, View view, int position,
            long arg3) {
         if(position != 2) {
            context.startActivity(new Intent(context, resultClassArray[position]));
 
            if(customMenuPopupWindow.isShowing()) {
                customMenuPopupWindow.dismiss();
            }

            if(position == 1) {
                activity.finish();
            }
         } else {
            SystemUtil.exitApp(activity);
         }
      }
}

/**
  * 初始化创建自定义menu
  * 第三个参数，menu背景，0代表白色
  */
    private void initNewPopupWindow() {
      customMenuPopupWindow = new CustomMenuPopupWindow(
            this, bodyAdapterImgArray.length, new BodyClickEvent(), SystemUtil.screenHeight);
      customMenuPopupWindow.setBodyAdapter(bodyAdapter);   
}