java - 如何维护自定义 ListView 中每个 EditText 的值

Question

美好的一天，我在自定义 ListView 中维护每个 EditText 的值时遇到问题，例如我旋转屏幕，每个值都消失了，请帮助我应该采取什么方法，在此先感谢。

图片适配器

    public View getView(int position, View convertView, ViewGroup parent) {
        View row;
        row = convertView;
        final dataHandler handler;
        if(convertView == null){
            LayoutInflater inflater = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate( R.layout.row_layout,parent, false);
            handler = new dataHandler();
            handler.pictures = (ImageView) row.findViewById(R.id.pictures);
            handler.name = (TextView) row.findViewById(R.id.picturename);
            handler.qty= (EditText) row.findViewById(R.id.qty);
            handler.add = (Button) row.findViewById(R.id.btnplus);
            handler.minus = (Button) row.findViewById(R.id.btnminus);
            row.setTag(handler);
        }else{
            handler = (dataHandler) row.getTag();
        }
        final PSP psp;
        psp =(PSP) this.getItem(position);
    Picasso.with(getContext()).load(psp.getPicture()).resize(200, 155).into(handler.pictures);
    handler.name.setText(psp.getName() + "\n ₱" + psp.getPrice());
    handler.qty.setText("0");
    img = psp.getPicture();

    handler.add.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String pricex = handler.qty.getText().toString();
            int xx = Integer.parseInt(pricex);
            int total = xx + 1;
            String totalx = Integer.toString(total);
            handler.qty.setText(totalx);

            map.put("" + handler.name.getText().toString(), " " + handler.qty.getText().toString());
            ShowHashMapValue();
        }
    });

    handler.minus.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String pricex = handler.qty.getText().toString();

            int xx = Integer.parseInt(pricex);
            if(xx > 0 ){
                int total = xx-1;
                String totalx = Integer.toString(total);
                handler.qty.setText(totalx);
                map.put("" + handler.name.getText().toString(), " " + handler.qty.getText().toString());


            }}
    });



    return row;
}

Answer 1

添加setQuantity 和getQuantity(PSP 模型中的getter-setter 方法)。

    String pricex = psp.getQuanntity();
                int xx = Integer.parseInt(pricex);
                int total = xx + 1;
                String totalx = Integer.toString(total);
    handler.qty.setText(totalx);

     handler.add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {    
                //add
                psp.setQuantity(yourQuantity++);
                notifyDataSetChanged();
              }
        });

 handler.minus.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {    
                //add
                psp.setQuantity(yourQuantity--);
                notifyDataSetChanged();
              }
        });

希望对你有帮助