Android - 多選擇自定義適配器listview

Question

我需要閱讀我的android應用程序中的聯繫人列表，並顯示給用戶一個多選的選項。 我剛剛看到了與ListView.CHOICE_MODE_MULTIPLE的Android示例，但我需要不同的東西，我想要一個custm佈局。 我需要顯示bot的名稱和聯繫人的號碼，所以我創建了我自己的適配器。所有的 首先我做了myown類來創建一個聯繫人：

//Contacts class 
public class Contatto { 


    private String nome; //The name 
    private String numero;//number 

    public String getNome(){ //Get Name 
     return nome; 
    } 

    public String getNumero(){ //Get number 
     return numero; 
    } 

    public void setNome(String n){ //Set name 
     this.nome = n; 
    } 

    public void setNumero(String n){ //Set number 
     this.numero = n; 
    } 

} 

然後我用cicle使用一個線程來通知應用程序正在用戶把所有的contatcs ...

import java.util.ArrayList; 

import android.app.ListActivity; 
import android.app.ProgressDialog; 
import android.content.Context; 
import android.database.Cursor; 
import android.os.Bundle; 
import android.provider.ContactsContract; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.TextView; 

public class RecuperaRubrica extends ListActivity{ 


private ProgressDialog m_ProgressDialog = null; 
private ArrayList<Contatto> arrayContatti = null; 
private ContattoAdapter m_adapter; 
private Runnable viewContatti; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.recupera_rubrica); 

    arrayContatti = new ArrayList<Contatto>(); 
    this.m_adapter = new ContattoAdapter(this, R.layout.riga, arrayContatti); 
    setListAdapter(this.m_adapter); 

    viewContatti = new Runnable(){ 
     @Override 
     public void run() { 
      getContatti(); 
     } 
    }; 
    Thread thread = new Thread(null, viewContatti, "MagentoBackground"); 
    thread.start(); 
    m_ProgressDialog = ProgressDialog.show(RecuperaRubrica.this,  
      "ATTENDI...", "Recupero contatti in corso ...", true); 
} 
private Runnable returnRes = new Runnable() { 

    @Override 
    public void run() { 
     if(arrayContatti != null && arrayContatti.size() > 0){ 
      m_adapter.notifyDataSetChanged(); 
      for(int i=0;i<arrayContatti.size();i++) 
      m_adapter.add(arrayContatti.get(i)); 
     } 
     m_ProgressDialog.dismiss(); 
     m_adapter.notifyDataSetChanged(); 
    } 
}; 
private void getContatti(){ 
     try{ 
      arrayContatti = new ArrayList<Contatto>(); 
      Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null); //Cursore della rubrica 
      while (cursor.moveToNext()) { //Entro nel ciclo se trovo almeno un contatto 
       try{ 
       //Recupero tutte le info dell'utente corrente 
       String contactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID)); 
       String name=cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)); 
       String hasPhone = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER)); 

       //Se è disponibile almeno un numero di telefono lo recupero 
       if (Integer.parseInt(hasPhone) > 0) { 
        Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = "+ contactId, null, null); 
        while (phones.moveToNext()) { 
         String phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); 

         phoneNumber = str_replace("-","",phoneNumber); 
         phoneNumber = str_replace("+39","",phoneNumber); 

         Contatto contatto = new Contatto(); 
         contatto.setNome(name.trim()); 
         contatto.setNumero(phoneNumber.trim()); 

         if(!arrayContatti.contains(contatto)){ 
          arrayContatti.add(contatto); 
         } 
        } 
        phones.close(); //Chiudo la rubrica 
       } 
      }catch(Exception e){} 
     } 

     } catch (Exception e) { 
      Log.e("BACKGROUND_PROC", e.getMessage()); 
     } 
     runOnUiThread(returnRes); 
    } 
private class ContattoAdapter extends ArrayAdapter<Contatto> { 

    private ArrayList<Contatto> items; 

    public ContattoAdapter(Context context, int textViewResourceId, ArrayList<Contatto> items) { 
      super(context, textViewResourceId, items); 
      this.items = items; 
    } 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
      View v = convertView; 
      if (v == null) { 
       LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
       v = vi.inflate(R.layout.riga, null); 
      } 
      Contatto o = items.get(position); 
      if (o != null) { 
        TextView tt = (TextView) v.findViewById(R.id.NomeElenco); 
        TextView bt = (TextView) v.findViewById(R.id.NumeroElenco); 
        if (tt != null) { 
          tt.setText(o.getNome());        
        } 
        if(bt != null){ 
          bt.setText(o.getNumero()); 
        } 
      } 
      return v; 
    } 
} 

public String str_replace (String search, String replace, String subject) 
{ 
    StringBuffer result = new StringBuffer (subject); 
    int pos = 0; 
    while (true) 
    { 
    pos = result.indexOf (search, pos); 
    if (pos != -1) 
     result.replace (pos, pos + search.length(), replace); 
    else 
     break; 
    } 
    return result.toString(); 
} 
} 

這是簡單的XML佈局：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
> 
    <ListView 
     android:id="@+id/android:list" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     ></ListView> 

</LinearLayout> 

這項工作，但是當我運行應用程序，如果我檢查那麼第一個結果頁面滾動也是第一個結果在新的頁面被選中，等等......你能幫我理解爲什麼嗎？

Answer 1

我之前面臨過這樣的問題，下面是我發現它的原因。

由於列表視圖使用視圖對象回收來節省內存，我們需要某種機制來存儲每個列表項的選擇狀態，然後在get view方法中使用它來檢查或取消選擇（imp）選擇當檢索視圖時。

我希望它能幫助