我在列表视图中有多个编辑文本。编辑文本的数量不固定。滚动列表视图时，编辑文本会丢失其内容，或者其他一些焦点上的编辑文本显示某些其他编辑文本的值。我已经尝试过在Stack Overflow上提供的解决方案，但没有任何帮助。
我已经声明了一个哈希映射，我在其中存储位置和值，然后在哈希映射中设置编辑文本中的文本，但某处哈希映射会覆盖先前存储位置中的值。
如果需要代码，请告诉我。我会用我的代码更新我的问题。
使用我尝试的代码更新我的问题 -
public class JunkTabAdapter extends ArrayAdapter<JunkTabBean> {
private Activity mContext;
/* android.graphics.Typeface face; */
private int listItemForFile;
private static ArrayList<JunkTabBean> itemList = new ArrayList<JunkTabBean>();
private ListView download_row;
ImageLoader imageloader;
long fileLength;
String getImage, saveinternalImagePath;
Bitmap getBitmapImage;
HomeLoader hl;
NewImageLoader img;
String fromWhere;
String value="";
String qty="";
List<Integer> totAmtList = new ArrayList<Integer>();
JunkTab junkTab;
public int totAmt=0;
ViewHolder holder;
Map<Integer,String> map = new HashMap<Integer,String>();
int count=0;
public JunkTabAdapter(Activity context, int listItemForFile,
ArrayList<JunkTabBean> itemList,String fromWhere,JunkTab junkTab) {
super(context, listItemForFile, itemList);
this.mContext = context;
this.listItemForFile = listItemForFile;
this.itemList = itemList;
this.fromWhere=fromWhere;
this.junkTab=junkTab;
img=new NewImageLoader(context);
}
public int getCount() {
return itemList.size();
}
public JunkTabBean getItem(JunkTabBean position) {
return position;
}
public long getItemId(int position) {
return position;
}
public class ViewHolder {
public ImageView imgItem;
public ImageView imgInfo;
public ImageView imgDel;
public EditText edQty;
public TextView tvAmt;
public TextView tvTotAmt;
public View viewDivider;
int reference;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
if (row == null) {
holder = new ViewHolder();
LayoutInflater vi = (LayoutInflater)
mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = vi.inflate(R.layout.junktabcomponent, null);
holder = new ViewHolder();
holder.imgItem = (ImageView)row.findViewById(R.id.imgItem);
holder.imgDel = (ImageView)row.findViewById(R.id.imgDelete);
holder.imgInfo = (ImageView)row.findViewById(R.id.imgInfo);
holder. edQty = (EditText)row.findViewById(R.id.edQty);
holder.tvAmt = (TextView)row.findViewById(R.id.tvAmt);
holder.tvTotAmt = (TextView)row.findViewById(R.id.tvTotalAmt);
holder.viewDivider = (View)row.findViewById(R.id.view1);
row.setTag(holder);
// holder.edQty.setTag(itemList.get(position).getId());
} else {
holder = (ViewHolder) row.getTag();
}
/* LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Service.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.junktabcomponent,null, false);
holder = new ViewHolder();
holder.imgItem = (ImageView)row.findViewById(R.id.imgItem);
holder.imgDel = (ImageView)row.findViewById(R.id.imgDelete);
holder.imgInfo = (ImageView)row.findViewById(R.id.imgInfo);
holder. edQty = (EditText)row.findViewById(R.id.edQty);
holder.tvAmt = (TextView)row.findViewById(R.id.tvAmt);
holder.tvTotAmt = (TextView)row.findViewById(R.id.tvTotalAmt);
holder.viewDivider = (View)row.findViewById(R.id.view1); */
// holder.edQty.setText(qty);
holder.edQty.setInputType(InputType.TYPE_CLASS_NUMBER);
final JunkTabBean item = (JunkTabBean) itemList.get(position);
img.DisplayImage(item.getImage(), holder.imgItem);
holder.edQty.setHint(item.getUnits());
// final int pos=(Integer) holder.edQty.getTag();
if(map.containsKey(holder.reference))
{
holder.edQty.setText(map.get(holder.reference).toString());
}
holder.edQty.addTextChangedListener(new TextWatcher()
{
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
/*value=value+s;
Log.e("value",value);*/
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
//map.put(pos,s.toString());
map.put(holder.reference,s.toString());
Log.e("map",""+map);
//holder.tvAmt.setText(""+(Integer.parseInt(item.getPrize()) * Integer.parseInt(map.get(holder.reference))));
//holder.tvAmt.setText(""+(Integer.parseInt(item.getPrize()) * Integer.parseInt(s.toString())));
/*totAmt=totAmt+(Integer.parseInt(item.getPrize()) * Integer.parseInt(s.toString()));
junkTab.setTotAmt(""+totAmt);*/
//qty=s.toString();
}
});
holder.reference=position;
// holder.edQty.setText(map.get(position));
// if(!map.get(position).contains(""))
/* if(!holder.edQty.getText().toString().equalsIgnoreCase(""))
holder.tvAmt.setText(""+(Integer.parseInt(item.getPrize())* Integer.parseInt(holder.edQty.getText().toString())));*/
return row;
}
}
答案 0 :(得分：2)
这种private class MyViewHolder {
public EditText myEditText;
public ViewGroup myListItemLayout;
}
问题的通用解决方案是View Holder模式。它对绩效也有很小的积极影响。
基本上，我们的想法是创建一个表示一个Listview项的UI的类。它存储View实例（EditTexts和whatnot）及其内容完整。
getView()首次在列表适配器public View getView(int position, View convertView, ViewGroup parent) {
MyViewHolder holder = new ViewHolder();
// Get the data object for this row.
MyDataItem item = items.get(position);
// If we receive a null View we need to construct a one.
if (convertView == null) {
convertView = inflater.inflate(R.layout.my_list_item, parent, false);
// Store the UI elements in the View Holder.
holder.myEditText = (EditText)view.findViewById(R.id.editTextMyEditText);
holder.myListItemLayout = (ViewGroup)view.findViewById(R.id.layoutMyListItemLayout);
// Strore the View Holder as the View's tag.
convertView.setTag(holder);
}
// Get the holder from the View's tag.
holder = (ViewHolder) convertView.getTag();
...
}
中访问视图时会创建View Holder对象，然后将其存储为View对象＆＃39;标签
getView()现在，稍后在convertView != null和findViewById()中再次访问相同的视图时，我们将跳过所有holder = (ViewHolder) convertView.getTag();
代码并直接进入：
convertView.myTextView.setText("Hello world!")现在，视图具有正确的内容，而不是其他列表项的数据。
至于getView（）代码的其余部分，您只需用对View Holder的引用替换对View convertView的所有引用，即代替holder.myTextView.setText("Hello world!")，您将使用tableView.reloadData()
一些参考文献：
https://developer.android.com/training/improving-layouts/smooth-scrolling.html#ViewHolder
http://www.javacodegeeks.com/2013/09/android-viewholder-pattern-example.html
https://dzone.com/articles/optimizing-your-listview
http://www.vogella.com/tutorials/AndroidListView/article.html#adapterperformance_holder
答案 1 :(得分：0)
您的适配器必须为每个EditText保存文本：
仅关注Get all EditText values提示。