多选框和反选框

来源：互联网发布：对冲书籍知乎编辑：程序博客网时间：2024/06/05 15:04

list = new ArrayList<String>();
       for (int i=0;i<20;i++){

           list.add("这是item条目"+i);

       }
       adapter = new MyAdapter(MainActivity.this,list,cb);
       lv.setAdapter(adapter);

       //设置全选
               cb.setOnClickListener(new OnClickListener() {

                   @Override
                   public void onClick(View v) {
                       boolean flag = cb.isChecked();

                       for (int i = 0; i < adapter.getSelect().size(); i++) {
                           adapter.getSelect().set(i, flag);
                       }
                       adapter.notifyDataSetChanged();

                   }
               });

               //反选
               btn.setOnClickListener(new OnClickListener() {

                   @Override
                   public void onClick(View v) {
                       if (! adapter.getSelect().contains(true)) {
                           Toast.makeText(MainActivity.this, "qingxuanz", 0).show();
                       }else {
                           for (int i = 0; i < adapter.getSelect().size(); i++) {
                               if (adapter.getSelect().get(i)) {
                                   adapter.getSelect().set(i, false);
                               }else {
                                   adapter.getSelect().set(i, true);
                               }
                           }

                           if (adapter.getSelect().contains(false)) {
                               cb.setChecked(false);
                           }

                           adapter.notifyDataSetChanged();
                       }
                   }

});

//适配器

LinkedList<Boolean> linkedList=new LinkedList<Boolean>();

   public MyAdapter(Context context, List<String> list, CheckBox allBox) {
       super();
       this.context = context;
       this.list = list;
       this.allBox = allBox;

       for (int i=0;i<list.size();i++){

           linkedList.add(false);

       }
   }


   //对外提供一个方法获取这个集合
   public List<Boolean> getSelect() {
       return linkedList;
   }

   @Override
   public int getCount() {
       // TODO Auto-generated method stub
       return list.size();
   }

   @Override
   public Object getItem(int position) {
       // TODO Auto-generated method stub
       return list.get(position);
   }

   @Override
   public long getItemId(int position) {
       // TODO Auto-generated method stub
       return position;
   }

   @Override
   public View getView(final int position, View convertView, ViewGroup parent) {
       // TODO Auto-generated method stub

       if (convertView==null){

           convertView=View.inflate(context, R.layout.list_item, null);

       }
       TextView list_item_tv=(TextView) convertView.findViewById(R.id.list_item_tv);
       CheckBox list_item_cb=(CheckBox) convertView.findViewById(R.id.list_item_cb);
       list_item_tv.setText(list.get(position));
       list_item_cb.setChecked(linkedList.get(position));
       //对checkBox点击进行监听
       list_item_cb.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {
               //点中的时候改成相反的值
               linkedList.set(position, ! linkedList.get(position));

               //点击的同时还要去判断全选
               if (linkedList.contains(false)) {
                   allBox.setChecked(false);
               }else {
                   allBox.setChecked(true);
               }

               notifyDataSetChanged();
           }
       });

       return convertView;
   }

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