列表視圖與edittext - 值滾動時更改 - Android

Question

我已經與編輯文本的列表視圖。

我已經使用textchange偵聽器來收聽edittext。它的工作很好。

但是當listview滾動時，textchange監聽器已經調用並且值正在改變。

如何解決這個問題？

我的示例活動如下。

package com.example.test; 

import java.util.ArrayList; 

import android.app.Activity; 
import android.content.Context; 
import android.os.Bundle; 
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.BaseAdapter; 
import android.widget.EditText; 
import android.widget.ListView; 

public class MainActivity extends Activity { 

    private ListView listview; 
    private EditorAdapter adapter; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     listview=(ListView)findViewById(R.id.lst); 

     ArrayList<String> data = new ArrayList<String>(); 
     for(int i=0;i<10;i++) 
      data.add("i="+i); 

     adapter = new EditorAdapter(this,data); 
     listview.setAdapter(adapter); 

    } 

} 
class EditorAdapter extends BaseAdapter { 

    Context context; 
    ArrayList<String> data; 

    public EditorAdapter(Context context, ArrayList<String> data){ 

     this.context = context; 
     this.data = data; 
    } 

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

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

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

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     ViewHolder holder; 
     if(convertView==null){ 
      holder = new ViewHolder(); 
      convertView = LayoutInflater.from(context).inflate(R.layout.row_edit_string,null,false); 
      holder.editPropertyValue = (EditText) convertView.findViewById(R.id.editPropertyValue); 
      convertView.setTag(holder); 
     }else{ 
      holder = (ViewHolder) convertView.getTag(); 
     } 

     holder.editPropertyValue.setTag(position); 
     holder.editPropertyValue.setText(data.get(position)); 
     setNameTextChangeListener(holder, position); 
     convertView.setTag(holder); 
     return convertView; 
    } 

    class ViewHolder { 
     EditText editPropertyValue; 
    } 

    private void setNameTextChangeListener(final ViewHolder holder, final int position) { 
     holder.editPropertyValue.addTextChangedListener(new TextWatcher() { 

      @Override 
      public void onTextChanged(CharSequence s, int start, int before, int count) { 

       if(s.length() > 0) 
       { 
        System.out.println("s.toString() "+s.toString()); 
        data.set(position, s.toString()); 
        Log.d("rvg", position+": "+data.toString()); 
       } 

      } 

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

      @Override 
      public void afterTextChanged(Editable s) { } 
     }); 
    } 

} 

Answer 1

您正在通過getView()號增加TextWatcher。您應該添加TextWatcher一次。在if(convertView==null)中移動setNameTextChangeListener(holder, position);方法。

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    ViewHolder holder; 
    if(convertView==null){ 
     holder = new ViewHolder(); 
     convertView = youtInflater.from(context).inflate(R.layout.row_edit_string,null,false); 
     holder.editPropertyValue = (EditText) onvertView.findViewById(R.id.editPropertyValue); 
     setNameTextChangeListener(holder, position);  
convertView.setTag(holder); 
    }else{ 
     holder = (ViewHolder) convertView.getTag(); 
    } 

    holder.editPropertyValue.setTag(position); 
    holder.editPropertyValue.setText(data.get(position)); 
    convertView.setTag(holder); 
    return convertView; 
}