android-RecyclerView在新行中显示在EditText中输入的先前值

我正在创建一个Android应用程序,其中使用recyclerView,recyclerView行中有editText.

这是我的ReadingAdapter类

public class ReadingAdapter extends RecyclerView.Adapter<ReadingAdapter.ViewHolder>  implements AdapterView.OnItemSelectedListener {

    Context context;
    String valOpenReading, valClosReading, valConsumption;
    private List<ReadingData> readingList;
    static String[] arrValOpenRead, arrValClosRead, arrValConsumption;
    public ReadingAdapter(Context context, List<ReadingData> readingList) {
        this.context = context;
        this.readingList = readingList;

        arrValOpenRead = new String[readingList.size()];
        arrValClosRead = new String[readingList.size()];
        arrValConsumption = new String[readingList.size()];
    }

    @Override
    public ReadingAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.reading_sheet_layout, parent, false);
        return new ReadingAdapter.ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(final ReadingAdapter.ViewHolder holder, final int position) {
        ReadingData tempData = readingList.get(position);
        holder.pdtName.setText(tempData.pdtName);
        holder.keyId.setText("Key "+tempData.keyId);

        holder.etClosRead.addTextChangedListener(new TextWatcher() {
            boolean ignore = false;
            @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) {
                if (ignore)
                    return;
                ignore = true;
                valOpenReading = holder.etOpenRead.getText().toString();
                arrValOpenRead[position] = valOpenReading;
                valClosReading = s.toString().equals("") ? "0": s.toString();
                arrValClosRead[position] = valClosReading;
                if (!valOpenReading.equals("")) {
                    if (Integer.parseInt(valClosReading) < Integer.parseInt(valOpenReading)) {
                        Toast.makeText(context, "Check once! closing reading should be more than opening reading!", Toast.LENGTH_LONG).show();
                        valConsumption = "0";
                        holder.consumption.setText("");
                    } else {
                        valConsumption = (Integer.parseInt(valClosReading) - Integer.parseInt(valOpenReading))+"";
                        arrValConsumption[position] = valConsumption;
                        holder.consumption.setText(valConsumption);
                    }
                } else
                    Toast.makeText(context, "Please fill the opening reading!", Toast.LENGTH_SHORT).show();
                ignore = false;
            }
        });
    }

    @Override
    public int getItemCount() {
        return readingList.size();
    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }

    public class ViewHolder extends RecyclerView.ViewHolder{
        TextView pdtName, keyId, consumption;
        EditText etOpenRead, etClosRead;
        public ViewHolder(View view) {
            super(view);
            pdtName = (TextView)view.findViewById(R.id.txt_list_pdt_supp);
            keyId = (TextView)view.findViewById(R.id.key_set);
            etOpenRead = (EditText)view.findViewById(R.id.open_val_set);
            etClosRead = (EditText)view.findViewById(R.id.clos_val_set);
            consumption = (TextView)view.findViewById(R.id.consumption_val);
        }
    }
}

这是我的ReadingData.java

public class ReadingData {
    String pdtName, keyId, openReading, closReading, consumption;
    public ReadingData(String pdtName, String keyId) {
        this.pdtName = pdtName;
        this.keyId = keyId;
    }
}

在这里,如果我在recyclerView的起始项中输入值,那么当我向上滚动项至列表的底部时,最后一项将具有该值.

请忽略图片质量,因为我们无法上传2MiB以上的快照.

在此,列表滚动时视图被回收.如何防止将值复制到列表中的其他项目.

那个吐司也要重复几次.如何阻止这个.

更新：
通过SO问题How ListView’s recycling mechanism works的建议LQ Gioan,我得到了ListView实际上如何与视图回收一起工作的逻辑.

但是我不确定recyclerView是否也能正常工作.

但是在我的情况下,我该如何实施此过程.请有人在这里帮助我.

解决方法:

RecyclerView重用视图,实际上它只生成与屏幕上可见的视图一样多的视图.因此,如果可以看到为其他行设置的值,这是可以预期的

该解决方案将设置为您要更改为默认视图的视图的所有属性,或者应从数据集中显示任何行

因此,将addTextChangedListener放入insode ViewHolder构造函数中(您可以通过调用getAdapterPosition()来获得位置)以获得更好的性能,并从数据集中设置onBindViewHolder方法中的editText值

标签：recycler-adapter,android,android-recyclerview,addtextchangedlistener
来源： https://codeday.me/bug/20191013/1909240.html