自定义适配器：

private class myBaseAdapter extends BaseAdapter {        private ArrayList
     
       list;        public myBaseAdapter() {        }        public myBaseAdapter(ArrayList
      
        list) {            this.list = list;        }        @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) {            Contect contect= (Contect) getItem(position);//传进来的list的某一项            if(convertView==null){                LayoutInflater inflater=LayoutInflater.from(getContext());                convertView=inflater.inflate(R.layout.contect_item,parent,false);            }            TextView letter_Contect=convertView.findViewById(R.id.letter_Contect);            ImageView contect_Head=convertView.findViewById(R.id.contect_Head);            TextView contect_Name=convertView.findViewById(R.id.contect_Name);            letter_Contect.setText(contect.getLetter());            contect_Head.setImageResource(contect.getHead());            contect_Name.setText(contect.getName());            return convertView;        }    }
      
     

重点是getView()方法:

if(convertView==null){                LayoutInflater inflater=LayoutInflater.from(getContext());                convertView=inflater.inflate(R.layout.contect_item,parent,false);            }

 

 

BaseAdapter：https://blog.csdn.net/yelbosh/article/details/7831812