Question

我在ListView的EditText中输入了值，但是当我向上和向下滚动时，值不是焦点而是丢失。请帮我。我是新手。

我已尝试TextWatcher，并将数据保存到array，但问题是ListView中返回的观看位置并不总是正确的，所以我丢失了一些数据阵列。

这是我的代码

public class ListViewAdapter extends BaseAdapter {
private Context context;
private ArrayList<HashMap<String, String>> data;
private LayoutInflater inflater;
private View itemView;
HashMap<String, String> Result = new HashMap<String, String>();
private Bitmap ImageCover;

private TextView bookname;
private TextView bookcode;
private TextView index;
private ImageView bookcover;
private String BookIDSend;
private String QtySend;
private EditText TxtStock;
private String[] valueList;
private boolean InputState;

public ListViewAdapter(Context context, ArrayList<HashMap<String, String>> arraylist, boolean state) {
    this.context    = context;
    data            = arraylist;
    valueList       = new String[data.size()];
    InputState      = state;
}
@Override
public int getCount() { 
    return data.size();
}
@Override
public Object getItem(int position) {
    return position; }

@Override
public long getItemId(int position) { 
    return position; }

public View getView(final int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        inflater    = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        itemView    = inflater.inflate(R.layout.input_list_item, parent, false);
        if ( ( position % 2 ) == 0 ) {
            itemView.setBackgroundColor(Color.rgb(250,235,215));
        } else {
            itemView.setBackgroundColor(Color.rgb(255,235,205));
        }
        Result                  = data.get(position);
        ClassFile FileName      = new ClassFile();
        String AppDirectory     = FileName.GetAppDirectory(context);
        String Directory        = AppDirectory+"/cover/";

        index                   = (TextView) itemView.findViewById(R.id.numb);
        bookname                = (TextView) itemView.findViewById(R.id.book_name);
        bookcode                = (TextView) itemView.findViewById(R.id.code_book_input);
        bookcover               = (ImageView) itemView.findViewById(R.id.imgCover);
        TxtStock                = (EditText) itemView.findViewById(R.id.EdtIsi);
        TxtStock.setText(Result.get(InputActivity.INITIAL_STOCK));

        final int pos   = position;
        valueList[pos]  = Result.get(InputActivity.INITIAL_STOCK);
        if (InputState){
            TxtStock.setEnabled(true);
        }else{
            TxtStock.setEnabled(false);
        }
        TxtStock.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) {
            }
            public void afterTextChanged(Editable s) {
                valueList[pos] = s.toString().trim();
            }
        });
        bookname.setText(Result.get(InputActivity.BOOKNAME));
        bookcode.setText(Result.get(InputActivity.BOOK_CODE));
        ClassImage Procimg      = new ClassImage();
        ImageCover              = Procimg.decodeSampledBitmapFromUri( Directory + Result.get(InputActivity.BOOKCOVER), 90, 120);
        bookcover.setImageBitmap(ImageCover);
    }else {
        itemView    = convertView;
    }

    int j = position+ 1;
    index.setText("" + j);
    return itemView;
}

之前

Answer 1

当滚动ListView时，它将调用方法getView()，因此您需要将文本设置为EditText，因此您需要做的是：

TxtStock.setText(valueList[pos]);

Answer 2

首先在ListView中使用EditText并不是一个好主意！但如果你必须这样做，你可以尝试一下..

像这样改变你的代码..

@Override
public Object getItem(int position) {
return data.get(position); }

并且在getView（..）方法中，您可以回收视图以及导致数据丢失的原因。做这个改变..

移动此行` TxtStock.setText（Result.get（InputActivity.INITIAL_STOCK））; 到getView（..）

里面的if..else条件之外

希望这会有所帮助..当 convertView为空时只能查找ViewById，并且当你回收观点。谢谢！！ ; d

ListView中的EditText向上和向下滚动时丢失值

2 个答案: