Question

当我如此快速地向下/向上滚动时，位置变化得太快以至于弄乱了该位置的项目，导致文本改变而不是它应该是什么。我一直在寻找修复，但似乎无法确定它出错的地方。下面是我的Custom ArrayAdapter代码

import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.TextView;

import java.util.ArrayList;

import aungkyawpaing.ngapyinkeyboard.Models.CustomKey;
import aungkyawpaing.ngapyinkeyboard.R;
import butterknife.ButterKnife;
import butterknife.InjectView;

/**
 * Created by Vincent on 16-Apr-15.
 */
public class CustomKeyAdapter extends ArrayAdapter<CustomKey> {

    private int size;
    ArrayList<CustomKey> datas = new ArrayList<>();

    public CustomKeyAdapter(Context context, ArrayList<CustomKey> list) {
        super(context, R.layout.listitem_customkey, list);
        size = list.size();
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final ViewHolder viewHolder;

        if (convertView != null) {
            viewHolder = (ViewHolder) convertView.getTag();
        } else {
            LayoutInflater layoutInflater =
                    (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.listitem_customkey, parent, false);
            viewHolder = new ViewHolder(convertView);
            convertView.setTag(viewHolder);
        }
        CustomKey key = getItem(position);
        datas.add(position, key);

        viewHolder.txt_number.setText("Key #" + (position + 1) + " : ");
        viewHolder.value_field.setText(key.getOutput());
        viewHolder.value_field.addTextChangedListener(new MyTextWatcher(position));

        return convertView;
    }

    private class MyTextWatcher implements TextWatcher {

        private int position;

        public MyTextWatcher(int position) {
            this.position = position;
        }

        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            CustomKey key = getItem(position);
            key.setOutput(editable.toString());
            datas.add(position, key);
        }
    }

    static class ViewHolder {
        @InjectView(R.id.custom_key_number) TextView txt_number;
        @InjectView(R.id.custom_key_value) EditText value_field;

        public ViewHolder(View view) {
            ButterKnife.inject(this, view);
        }
    }

    public ArrayList<CustomKey> getValues() {
        return datas;
    }
}

编辑：TextView很好，只是EditText中的文本不断变化

Answer 1

在将TextWatcher添加到EditText之前，请移除TextWatcher的现有EditText。
在TextWatcher

中

 static class ViewHolder {
        @InjectView(R.id.custom_key_number) TextView txt_number;
        @InjectView(R.id.custom_key_value) EditText value_field;
        MyTextWatcher myWatcher;
        public ViewHolder(View view) {
            ButterKnife.inject(this, view);
        }
    }

现在删除TextWatcher的现有EditText，在TextWatcher方法中初始化视图持有者的getView()，并将TextWatcher添加到EditText

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

        if (convertView != null) {
            viewHolder = (ViewHolder) convertView.getTag();
        } else {
            LayoutInflater layoutInflater =
                    (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.listitem_customkey, parent, false);
            viewHolder = new ViewHolder(convertView);
            convertView.setTag(viewHolder);
        }
        CustomKey key = getItem(position);
        datas.add(position, key);

        viewHolder.txt_number.setText("Key #" + (position + 1) + " : ");
        viewHolder.value_field.setText(key.getOutput());
        //Remove the myWatcher
        viewHolder.value_field.emoveTextChangedListener(myWatcher);
        viewHolder.myWatcher=new MyTextWatcher(position);
        //add the myWatcher
        viewHolder.value_field.addTextChangedListener(myWatcher);

        return convertView;
    }

Answer 2

我已经解决了这个问题。我似乎在＆＃34; onTextChanged＆＃34;中，键是引用视图中的项目。因此setOutput会更改键输出。修复了以下代码

的问题

public void afterTextChanged(Editable editable) {
    CustomKey key = getItem(position);
    datas.add(position,  new CustomKey(key.getCode(), editable.toString()));
}

滚动列表视图项目位置更改

2 个答案: