問題描述

列表中有三個文本視圖和一個編輯文本.當我在編輯文本中輸入任何值時，相同的值也會復制到另一個編輯文本中.我厭倦了同時使用 onFocusChangedListener 和 onTextChanged 實現，但兩種情況下的問題都是一樣的.

I have three textviews and one edit text in the list. when I entered any value in the edittext, the same value is also copied in the other edittext. I tired implementing with both onFocusChangedListener and onTextChanged but the problem is same in both the cases.

public class ProductListAdapter extends BaseAdapter {

Context context;
public ArrayList<Products> prodList;
private static LayoutInflater inflater = null;
public ProductsList productListActivity;

public ProductListAdapter(Context context,ArrayList<Products> prodList) {
    this.context = context;
    this.prodList = prodList;
    inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    Log.e("In adapter", "yes");
}

@Override
public int getCount() {
    return prodList.size();
}

@Override
public Products getItem(int position) {
     return prodList.get(position); }

@Override
public long getItemId(int position) {
    return position;
}
@Override
public View getView( final int position, View convertView, ViewGroup parent) {
      Log.i(" in prodlist adapter","View holder");
      final   ViewHolder holder;
      if (convertView == null) {
            convertView = inflater.inflate(R.layout.productslistviewadapter, parent, false);

            holder = new ViewHolder();
            holder.tvdrCode = (TextView) convertView.findViewById(R.id.tvname);
            holder.tvDrName = (TextView) convertView.findViewById(R.id.tvprodpack);
            holder.tvterrcode= (TextView) convertView.findViewById(R.id.textView3);
            holder.caption = (EditText)convertView.findViewById(R.id.editText1);
            convertView.setTag(holder);

        } 
     else {
            holder = (ViewHolder) convertView.getTag();
        }

        Products p = prodList.get(position);
        holder.tvdrCode.setText(p.getDocCode());
        holder.tvDrName.setText(p.getDocName());
        holder.tvterrcode.setText(p.getAdr());

        //holder.caption.setText(prodList.get(position).caption);
       /* holder.caption.setId(position);

        holder.caption.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            public void onFocusChange(View v, boolean hasFocus) {
               if (!hasFocus) {
                    final int position = v.getId();
                    final EditText Caption = (EditText) v;  
                //  prodList.get(position)= Caption.getText().toString();
                    String d = prodList.get(position).getDocCode();
                    Log.e("dr code",d);
                }
            }
        }); */          

        holder.caption.setTag(position);
        // holder.caption.setText(ProdList.get(position).toString());
        int tag_position=(Integer) holder.caption.getTag();
        holder.caption.setId(tag_position); 

        holder.caption.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start,int before, int count) {
                  //2nd method  String d = planArraylist.get(position).getDocCode();
                 final int position2 = holder.caption.getId();
                 final EditText Caption = (EditText) holder.caption;
                 if(Caption.getText().toString().length()>0){
                    String d = prodList.get(position2).getDocCode();
                    Log.e("dr code",d);

                 }
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start,
                    int count, int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });  
            return convertView;
} 

 static class ViewHolder {
     TextView tvdrCode;
     TextView tvDrName;
     TextView tvterrcode;
     EditText caption;

} 
}

xml代碼

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ListView
    android:id="@+id/listView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:animationCache="false"
    android:scrollingCache="false"
    android:smoothScrollbar="true" > 

<!--    android:descendantFocusability="beforeDescendants" -->

</ListView>

推薦答案

我們知道 ListView 在滾動整個列表時會重用 ListItem 的視圖.

As we know ListView reuses the view of ListItem as we scroll the whole list.

所以當我們有一個帶有 EditText 的自定義 ListView 時就會出現問題，如果我們在第一個 EditText 中輸入任何值并開始滾動，那么當我們滾動 listview 時，一個 EditText 的值會被一個一個地復制到另一個 EditTexts 中.

So problem arises when we have a custom ListView with EditText where if we enter any value in the first EditText and start scrolling then the value of EditText one is copied to another the EditTexts one by one as we scroll the listview .

當列表視圖重用視圖時發生這種情況，并且當另一個視圖中的另一個列表項(即未看到的視圖向上滾動)時，它會重用舊列表視圖，因此該視圖的舊值會在新的編輯文本中看到.

This happens as the listview reuses the view and as the other listitem from another view i.e. the view which is not seen scrolls upwards it reuses the old lists view and hence the old value of that view is seen in the new edittext.

http://www.webplusandroid.com/creating-listview-with-edittext-and-textwatcher-in-android/

這篇關于列表視圖中的 EditText 重復值的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！