Question

我一直在寻找解决问题的方法，但找不到答案，但没有一个对我有用。：/ 我在每个列表项中都有一个带有edittext的列表视图，当向下滚动并再次向上移动时，已编辑的edittext的内容已丢失或其他edittext已占用其值。

http://i.stack.imgur.com/zWu0H.png

我有一个全局textWatcher并动态添加和删除它。 Edittexts一直在丢失内容。

 public View getView(int position, View convertView, ViewGroup parent) {

    ViewHolder holder;
    ArrayPosition = position;

    if(convertView == null)
    {
        LayoutInflater inflater = (LayoutInflater) AdapterContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.item_list_order, parent, false);

        holder = new ViewHolder();
        holder.FlightTimeTextView = (TextView) convertView.findViewById(R.id.itemFlightTimeTextView);
        holder.BusNumberEditText = (EditText) convertView.findViewById(R.id.busNumberEditText);

        convertView.setTag(holder);
    } else {

        holder = (ViewHolder) convertView.getTag();
    }

    final Order order = Orders.get(position);
    holder.FlightTimeTextView.setText(order.getFlightTime());

    holder.BusNumberEditText.removeTextChangedListener(textWatcher);

    Log.d("String in array String", HolderBusNumbers[position]);
    holder.BusNumberEditText.setText(HolderBusNumbers[position]);

    holder.BusNumberEditText.addTextChangedListener(textWatcher);

    return convertView;
}

int ArrayPosition = 0;
TextWatcher textWatcher = new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        Log.d("TextWatcher", s.toString());
        HolderBusNumbers[ArrayPosition] = s.toString();
    }

    @Override
    public void afterTextChanged(Editable s) {

    }
};

我正在工作一个小时，你能帮我解决我做错了什么：/ ??

Answer 1

将textwatcher代码移到getView（）

中

public View getView(int position, View convertView, ViewGroup parent) {

    ViewHolder holder;
    ArrayPosition = position;

    if(convertView == null)
    {
        LayoutInflater inflater = (LayoutInflater) AdapterContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.item_list_order, parent, false);

        holder = new ViewHolder();
        holder.FlightTimeTextView = (TextView) convertView.findViewById(R.id.itemFlightTimeTextView);
        holder.BusNumberEditText = (EditText) convertView.findViewById(R.id.busNumberEditText);

        convertView.setTag(holder);
    } else {

        holder = (ViewHolder) convertView.getTag();
    }

    final Order order = Orders.get(position);
    holder.FlightTimeTextView.setText(order.getFlightTime());

    holder.BusNumberEditText.removeTextChangedListener(textWatcher);

    Log.d("String in array String", HolderBusNumbers[position]);
    holder.BusNumberEditText.setText(HolderBusNumbers[position]);

   holder.BusNumberEditText.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start,
                    int before, int count) {
                Log.d("TextWatcher", s.toString());
        HolderBusNumbers[ArrayPosition] = s.toString();
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start,
                    int count, int after) {

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

    return convertView;
}

Answer 2

你必须使用HashMap对象，如果EditText包含或不包含值，它将存储数据。当你滚动列表视图时，它将通过调用其getView方法以及与每个edittext关联的文本再次呈现。

将HashMap全局定义为适配器

public static HashMap<Integer,String> myList=new HashMap<Integer,String>();



public View getView(int position, View convertView, ViewGroup parent) {

    ViewHolder holder;
    ArrayPosition = position;

    if(convertView == null)
    {
        LayoutInflater inflater = (LayoutInflater) AdapterContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.item_list_order, parent, false);

        holder = new ViewHolder();
        holder.FlightTimeTextView = (TextView) convertView.findViewById(R.id.itemFlightTimeTextView);
        holder.BusNumberEditText = (EditText) convertView.findViewById(R.id.busNumberEditText);

        convertView.setTag(holder);
    } else {

        holder = (ViewHolder) convertView.getTag();
    }

    final Order order = Orders.get(position);
    holder.FlightTimeTextView.setText(order.getFlightTime());

    Log.d("String in array String", HolderBusNumbers[position]);

    holder.BusNumberEditText.addTextChangedListener(new TextWatcher() {

    public void onTextChanged(CharSequence s, int start,
            int before, int count) {

    }

    public void beforeTextChanged(CharSequence s, int start,
            int count, int after) {
        // TODO Auto-generated method stub

    }

    public void afterTextChanged(Editable s) {

        myList.put(pos,s.toString.trim());
    }
    });

    holder.BusNumberEditText.setText(myList.get(position));



    return convertView;
    }

对你有帮助!!

Answer 3

我也是android的初学者，但尝试使用SimpleAdapter来显示数据

Answer 4

在静态ViewHolder中创建一个引用整数，用于保存listview中单击项的位置。然后在文本观察器中，我设置了列表的viewholder.reference位置中存在的项的字符串。因此，静态正在帮助完成这项工作。以下代码是有效的！

static class ViewHolder{

    TextView FlightTimeTextView;
    EditText BusNumberEditText;
    int Reference;
}

public View getView(final int position, View convertView, ViewGroup parent) {

    final ViewHolder holder;
    if(convertView == null)
    {
        LayoutInflater inflater = (LayoutInflater) AdapterContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.item_list_order, parent, false);

        holder = new ViewHolder();
        holder.FlightTimeTextView = (TextView) convertView.findViewById(R.id.itemFlightTimeTextView);
        holder.BusNumberEditText = (EditText) convertView.findViewById(R.id.busNumberEditText);

        convertView.setTag(holder);
    } else {

        holder = (ViewHolder) convertView.getTag();
    }

    final Order order = Orders.get(position);

    holder.Reference = position;
    holder.FlightTimeTextView.setText(order.getFlightTime());
    holder.BusNumberEditText.setText(order.getBusNumber());
    holder.BusNumberEditText.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            Orders.get(holder.Reference).setBusNumber(s.toString());
        }
    });

    return convertView;
}

}

Answer 5

将你的Textwatcher放在适配器的getView（）函数中，make position（getview函数的第一个参数）final int和onTextChange执行此操作

option

ListView中的EditText会丢失滚动内容

5 个答案: