EditText in ListView在滚动中丢失内容
EditText in ListView在滚动中丢失内容
提问于 2015-06-11 07:14:38
我一直在寻找解决问题的方法，找到答案，但没有一个对我有用。/我在每个列表项中都有一个带有编辑文本的列表视图，当滚动并再次向上滚动时，编辑的编辑文本的内容已经丢失，或者其他编辑文本已经占用了他的价值。
http://i.stack.imgur.com/zWu0H.png
我有一个全局textWatcher，并动态地添加和删除它。编辑内容不断丢失。
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) {
}
};我工作了一个小时，你能帮我解决一下我做错了什么吗？
回答 5
Stack Overflow用户
回答已采纳
发布于 2015-06-11 11:22:22
在静态ViewHolder中创建一个引用整数，该整数保存列表视图中单击项的位置。然后，在文本观察器中，我设置了存在于列表的viewholder.reference位置中的项的字符串。所以，静电对这份工作有帮助。下面的代码起作用了！
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;
}}
Stack Overflow用户
发布于 2015-06-11 07:44:07
将文本处理程序代码移动到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;
}Stack Overflow用户
发布于 2015-06-11 07:58:24
您必须使用HashMap对象来存储数据，如果edittext包含值，或者当您滚动listview时，它将通过调用其getView方法以及与每个编辑文本相关联的文本再次呈现。
- 将HashMap全局定义为适配器 公共静态HashMap myList=new HashMap()；公共视图getView(int位置，视图convertView，ViewGroup父级){ ViewHolder持位；ArrayPosition =位置；if(convertView == null) { LayoutInflater空值= (LayoutInflater) String> convertView =inflater.inflate(LayoutInflater，双亲，false)；holder =新的String>()；( convertView.findViewById(R.id.itemFlightTimeTextView)；= (TextView) TextView holder.BusNumberEditText = (EditText) convertView.findViewById(R.id.busNumberEditText)；convertView.setTag( holder )；} holder.FlightTimeTextView {holder= (ViewHolder) convertView.getTag()；} final order = Orders.get(position)；holder.FlightTimeTextView.setText(order.getFlightTime())；Log.d("String in array String"，HolderBusNumbersposition)；holder.BusNumberEditText.addTextChangedListener(new TextWatcher() { public void onTextChanged(CharSequence s，int start，int onTextChanged，int count) {} public void beforeTextChanged(CharSequence s，int start，int count，int after) { // TODO自动生成的方法存根} public void afterTextChanged(可编辑的s) { myList.put(pos，s.toString.trim()；})；holder.BusNumberEditText.setText(myList.get(position))；返回convertView；}
这会对你有帮助的！
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原文链接：
https://stackoverflow.com/questions/30774050
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