Android CustomListAdapter與複選框不能正常工作

Question

我正在一個自定義適配器，其中我創建了一行textview和複選框。 列表正在呈現正確，但是當我選擇一個項目自動選擇一些其他項目，當我滾動列表選定的項目被取消選擇。

這裏是我的名單適配器代碼：

import java.util.ArrayList; 

import com.example.interactiveapp.R; 
import com.interactiveapp.Constants; 

import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Handler; 
import android.os.Message; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.Button; 
import android.widget.CheckBox; 
import android.widget.Filter; 
import android.widget.Filterable; 
import android.widget.ImageView; 
import android.widget.ImageView.ScaleType; 
import android.widget.TextView; 

public class FBContactlistAdapter extends BaseAdapter implements Filterable { 
    private LayoutInflater mInflater; 
    private ArrayList<Object> itemList; 
    private Activity _activity; 

    String contactName=""; 
    String photoPath=""; 
    String emailId=""; 

    public FBContactlistAdapter(Activity activity, ArrayList<Object> itemList) { 
     this._activity = activity; 
     this.itemList = itemList; 
     mInflater = (LayoutInflater) activity 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    public int getCount() { 
     return itemList != null ? itemList.size(): 0; 
    } 

    public Object getItem(int position) { 
     return itemList.get(position); 
    } 

    public Filter getFilter() { 
     return null; 
    } 

    public long getItemId(int position) { 
     return 0; 
    } 

    static class ViewHolder { 
     CheckBox checkBox; 
     TextView emailTxt; 
    } 

    public View getView(final int position, View convertView, ViewGroup parent) { 
     final ContactBean contactBean=(ContactBean)getItem(position); 
     final ViewHolder holder; 
     if (convertView == null) { 
      convertView = mInflater.inflate(R.layout.fb_contact_list_row, null); 
      holder = new ViewHolder(); 
      holder.checkBox = (CheckBox)convertView.findViewById(R.id.checkBox1); 
      holder.emailTxt = (TextView)convertView.findViewById(R.id.username_txt); 
      convertView.setTag(holder); 
     } else { 
      holder = (ViewHolder) convertView.getTag(); 
     } 

     holder.emailTxt.setOnClickListener(new OnClickListener() { 
      public void onClick(View arg0) { 
       emailId=contactBean.getEmailId(); 
       if(contactBean.isSelected==false){ 
        contactBean.setSelected(true); 
        holder.checkBox.setChecked(true); 
        Constants.fbContactListArrayList.set(position, contactBean); 
       }else{ 
        contactBean.setSelected(false); 
        holder.checkBox.setChecked(false); 
        Constants.fbContactListArrayList.set(position, contactBean); 
       } 
      } 
     }); 

     //SET VALUES ON LIST VIEW 
     emailId=contactBean.getEmailId(); 
     if(emailId.length()!=0 ||emailId!=null){ 
      holder.emailTxt.setText(emailId); 
     } 
     return convertView; 
    } 

    //HANDLER 
    private Handler _handler = new Handler() { 
     public void dispatchMessage(Message msg) { 
      switch (msg.arg1) { 

      case 123: 
       break; 
      default: 
       break; 
      } 
     } 
    }; 

    public void serverResponse(String response, int processid) { 
     Message msg = new Message(); 
     msg.arg1 = processid; 
     msg.obj = response; 
     _handler.dispatchMessage(msg); 
    } 

    /*//SEND EMAIL TO INVITE FRIEND 
    public void sendEmail(String emailId){ 
     Intent intent = new Intent(Intent.ACTION_SEND); 
     //intent.setType("text/plain"); 
     intent.setType("message/rfc822"); 
     intent.putExtra(Intent.EXTRA_EMAIL, emailId); 
     intent.putExtra(Intent.EXTRA_SUBJECT,Constant.EMAIL_SUBJECT); 
     intent.putExtra(Intent.EXTRA_TEXT, Constant.EMAIL_CONTENT); 
     _activity.startActivity(Intent.createChooser(intent, "Send Email")); 
    }*/ 

} 

Answer 1

你可以嘗試使emailTxt成爲CheckedTextView和然後做你的工作，像下面

holder.emailTxt.setChecked(contactBean.isSelect); 
    holder.emailTxt.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      contactBean.isSelect = ! contactBean.isSelect; 
      notifyDataSetChanged(); 

     } 
    }); 

Answer 2

你必須刷新getView（）的數據，因爲列表視圖將回收的觀點：

public View getView(final int position, View convertView, ViewGroup parent) { 
    final ContactBean contactBean=(ContactBean)getItem(position); 
    final ViewHolder holder; 
    if (convertView == null) { 
     convertView = mInflater.inflate(R.layout.fb_contact_list_row, null); 
     holder = new ViewHolder(); 
     holder.checkBox = (CheckBox)convertView.findViewById(R.id.checkBox1); 
     holder.emailTxt = (TextView)convertView.findViewById(R.id.username_txt); 
     convertView.setTag(holder); 
    } else { 
     holder = (ViewHolder) convertView.getTag(); 
    } 

    holder.emailTxt.setOnClickListener(new OnClickListener() { 
     public void onClick(View arg0) { 
      emailId=contactBean.getEmailId(); 
      if(contactBean.isSelected==false){ 
       contactBean.setSelected(true); 
       holder.checkBox.setChecked(true); 
       Constants.fbContactListArrayList.set(position, contactBean); 
      }else{ 
       contactBean.setSelected(false); 
       holder.checkBox.setChecked(false); 
       Constants.fbContactListArrayList.set(position, contactBean); 
      } 
     } 
    }); 

    //SET VALUES ON LIST VIEW 
    emailId=contactBean.getEmailId(); 
    if(emailId.length()!=0 ||emailId!=null){ 
     holder.emailTxt.setText(emailId); 
    } 
    holder.setChecked(contactBean.isSelected); 
    return convertView; 
} 

如果你不想回收視圖，你可以看到我的另一個答案，如何管理自己查看： Android, List Adapter returns wrong position in getView

Answer 3

兩件事情需要做

1. 得到ArrayList檢查項目，並填補onChecked名稱或ID email至極Unique
2. 匹配當前getting名稱或項目Id wich填寫ArraList

如果（checkedid.contains（allReadyInvitedSetGet.getNvitedlist_gmail（）得到（位置）.getEmail（））

{
holder.chbox.setChecked（真）。

   } else { 
        holder.chbox.setChecked(false); 
       }