android创建popwindow以及listview点击刷新状态

1. popwindow的创建

   图示例子中是点击textView弹出popwindow。

            /**
    * 弹出popwindow
    *
    * @param tv
    */
   private void showPopWindow(final TextView tv) {
       int height = tv.getHeight();//得到控件的高度
       int width = tv.getWidth();//得到控件的宽度
       View contextView = LayoutInflater.from(activity).inflate(R.layout.item_home, null);
       mRecycleView = (ListView) contextView.findViewById(R.id.home_recycleview);
       mPopupWindow = new PopupWindow(contextView, width, ViewGroup.LayoutParams.WRAP_CONTENT);//构造
       mPopupWindow.setOutsideTouchable(true);//设置外部可点击
       mPopupWindow.setTouchable(true);
       mPopupWindow.setBackgroundDrawable(new BitmapDrawable());
       mPopupWindow.setFocusable(true);        // 设置窗体可以获得焦点, 默认不可以获得焦点
       mPopupWindow.setFocusable(true);
       mPopupWindow.showAsDropDown(tv, 0, 0);//正下方弹出  这里好几种方式
       contextView.setOnTouchListener(new View.OnTouchListener() {
           @Override
           public boolean onTouch(View v, MotionEvent event) {
               dissPopWindows();
               return false;
           }
       });
       //加载适配器
       if (tv.getId() == R.id.tv_grade) {
           adapter = new MyRecycleAdapter(list1, activity);
           //年级
       } else {
           adapter = new MyRecycleAdapter(list2, activity);
       }
       mRecycleView.setAdapter(adapter);
       mRecycleView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
           @Override
           public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
               GradeBean gradeBean;
               if (tv.getId() == R.id.tv_grade) {
                   gradeBean = list1.get(position);
                   //年级
                   for (GradeBean bean : list1
                           ) {
                       bean.setSelected(false);
                   }
               } else {
                   gradeBean = list2.get(position);
                   for (GradeBean bean : list2
                           ) {
                       bean.setSelected(false);
                   }
               }
               gradeBean.setSelected(true);
               tv.setText(gradeBean.getName());
               dissPopWindows();
           }
       });
   }
   

1. listview或者recycleview更改状态

• bean对象

          public class GradeBean {
      private String name;
      private int gradeId;
      private boolean isSelected;
  
      public GradeBean() {
      }
  
      public GradeBean(String name, int gradeId) {
          this.name = name;
          this.gradeId = gradeId;
      }
  
      public GradeBean(String name, int gradeId, boolean isSelected) {
          this.name = name;
          this.gradeId = gradeId;
          this.isSelected = isSelected;
      }
  
      public String getName() {
          return name;
      }
  
      public void setName(String name) {
          this.name = name;
      }
  
      public int getGradeId() {
          return gradeId;
      }
  
      public void setGradeId(int gradeId) {
          this.gradeId = gradeId;
      }
  
      public boolean isSelected() {
          return isSelected;
      }
  
      public void setSelected(boolean selected) {
          isSelected = selected;
      }
  }
  

• Adapter

        public class MyRecycleAdapter extends BaseAdapter {
    private List<GradeBean> list;
    private Context context;
    LayoutInflater inflater;
    private String name;


    public MyRecycleAdapter(List<GradeBean> list, Context context) {
        this.list = list;
        this.context = context;
        inflater = LayoutInflater.from(context);
    }


    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.item_home_adapter, null);
            holder = new ViewHolder();
            holder.iv = (ImageView) convertView.findViewById(R.id.item_iv);
            holder.tv = (TextView) convertView.findViewById(R.id.item_tv);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        GradeBean gradeBean = list.get(position);
        if (gradeBean.isSelected()) {
            holder.iv.setVisibility(View.VISIBLE);
        } else {
            holder.iv.setVisibility(View.INVISIBLE);
        }
        holder.tv.setText(gradeBean.getName());
        return convertView;
    }


    private class ViewHolder {
        TextView tv;
        ImageView iv;
    }

}

主要就是getView中的判断

• 条目点击事件

         mRecycleView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
          GradeBean gradeBean;
          if (tv.getId() == R.id.tv_grade) {
              gradeBean = list1.get(position);
              //年级
              for (GradeBean bean : list1
                      ) {
                  bean.setSelected(false);
              }
          } else {
              gradeBean = list2.get(position);
              for (GradeBean bean : list2
                      ) {
                  bean.setSelected(false);
              }
          }
          gradeBean.setSelected(true);
          tv.setText(gradeBean.getName());
          dissPopWindows();
      }
  });