在使用 Cursor 适配器时，我找不到保存复选框状态的方法。其他一切正常，但如果我点击一个复选框，它会在回收时重复。我看过使用数组适配器的示例，但由于我缺乏经验，我发现很难将其转换为使用游标适配器。有人可以给我一个如何去做的例子。任何帮助表示赞赏。

private class PostImageAdapter extends CursorAdapter {

    private static final int s = 0;
    private int layout;
    Bitmap bm=null;
    private String PostNumber;
    TourDbAdapter mDbHelper;


    public PostImageAdapter (Context context, int layout, Cursor c, String[] from, int[] to, String Postid) {

        super(context, c);
        this.layout = layout;
        PostNumber = Postid;

     mDbHelper = new TourDbAdapter(context);
     mDbHelper.open();

    }

    @Override
    public View newView(Context context, final Cursor c, ViewGroup parent) {

     ViewHolder holder;

     LayoutInflater inflater=getLayoutInflater();
     View row=inflater.inflate(R.layout.image_post_row, null);       

   holder = new ViewHolder();

   holder.Description = (TextView) row.findViewById(R.id.item_desc);
   holder.cb = (CheckBox) row.findViewById(R.id.item_checkbox);
   holder.DateTaken = (TextView) row.findViewById(R.id.item_date_taken);
   holder.Photo = (ImageView) row.findViewById(R.id.item_thumb);

   row.setTag(holder);

 int DateCol = c.getColumnIndex(TourDbAdapter.KEY_DATE);
 String Date = c.getString(DateCol);

 int DescCol = c.getColumnIndex(TourDbAdapter.KEY_CAPTION);
 String Description = c.getString(DescCol);    

 int FileNameCol = c.getColumnIndex(TourDbAdapter.KEY_FILENAME); 
 final String FileName = c.getString(FileNameCol);

 int PostRowCol = c.getColumnIndex(TourDbAdapter.KEY_Post_ID); 
 String RowID = c.getString(PostRowCol);

 String Path = "sdcard/Tourabout/Thumbs/" + FileName + ".jpg";    
 Bitmap bm = BitmapFactory.decodeFile(Path, null); 

 holder.Photo.setImageBitmap(bm);
 holder.DateTaken.setText(Date);
 holder.Description.setText(Description);

 holder.cb.setOnClickListener(new OnClickListener() {  
    @Override
 public void onClick(View v) {
    CheckBox cBox = (CheckBox) v;
    if (cBox.isChecked()) {

      mDbHelper.UpdatePostImage(FileName, PostNumber);

    } 
    else if (!cBox.isChecked()) {    
      mDbHelper.UpdatePostImage(FileName, "");

    }

  }
});
return row;

};

    @Override
    public void bindView(View row, Context context, final Cursor c) {  

     ViewHolder holder;
     holder = (ViewHolder) row.getTag();   

      int DateCol = c.getColumnIndex(TourDbAdapter.KEY_DATE);
         String Date = c.getString(DateCol);

         int DescCol = c.getColumnIndex(TourDbAdapter.KEY_CAPTION);
         String Description = c.getString(DescCol);    

         int FileNameCol = c.getColumnIndex(TourDbAdapter.KEY_FILENAME); 
      final String FileName = c.getString(FileNameCol);

      int PostRowCol = c.getColumnIndex(TourDbAdapter.KEY_Post_ID); 
         String RowID = c.getString(PostRowCol);

      String Path = "sdcard/Tourabout/Thumbs/" + FileName + ".jpg";    
         Bitmap bm = BitmapFactory.decodeFile(Path, null); 

        File x = null;

         holder.Photo.setImageBitmap(bm);
         holder.DateTaken.setText(Date);
         holder.Description.setText(Description);

         holder.cb.setOnClickListener(new OnClickListener() {  
        @Override
        public void onClick(View v) {
         CheckBox cBox = (CheckBox) v;
         if (cBox.isChecked()) {

               mDbHelper.UpdatePostImage(FileName, PostNumber);

         } 
         else if (!cBox.isChecked()) {    
               mDbHelper.UpdatePostImage(FileName, "");

         }

        }
       });

    }

}  

static class ViewHolder{
  TextView Description;
  ImageView Photo;
  CheckBox cb;
  TextView DateTaken;
}
}

最佳答案

我自己也有同样的问题:如何在自定义布局中切换多个选择 CheckedTextView(即不使用 android.R.layout.simple_list_item_multiple_choice)

以下对我有用。我的示例是一个自定义 View ，提供了一个从 SimpleCursorAdapter.

我的自定义 View (row_contact.xml):

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_height="wrap_content" android:layout_width="fill_parent">

  <CheckedTextView
    android:id="@android:id/text1"
    android:layout_width="fill_parent"
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:gravity="center_vertical"
    android:paddingLeft="6dip"
    android:paddingRight="6dip" 
    android:checkMark="?android:attr/listChoiceIndicatorMultiple"
    />

  <TextView
    android:text="@+id/TextView01"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/tvNumber"
    android:layout_gravity="bottom" 
    android:paddingLeft="6dip"
    android:paddingRight="6dip" 
    />

</FrameLayout>

适配器在ListActivity.OnCreate中创建，调用setupViews():

  private void setupViews() {
    bOk       = (Button) findViewById(R.id.ButtonOK);
    bCancel   = (Button) findViewById(R.id.ButtonCancel);
    FListView = getListView(); 
    //
    bOk.setText("Select");
    //
    FListView.setItemsCanFocus(false);
    FListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    //
    bOk.setOnClickListener(this);
    bCancel.setOnClickListener(this);
    //
    ContentResolver content = getContentResolver();
    Cursor cursor = ApplicationHelper.MobilePhoneContacts(content);
    startManagingCursor(cursor);

    ListAdapter adapter = new CheckedCursorAdapter( SelectContacts.this, R.layout.row_contact, cursor,                
        new String[] {People.NAME, People.NUMBER},               
        new int[] {android.R.id.text1, R.id.tvNumber});          
    setListAdapter(adapter);
  }

自定义适配器:

  public class CheckedCursorAdapter extends SimpleCursorAdapter {

    Activity context;
    Cursor c;

    public CheckedCursorAdapter(Activity context, int rowContact, Cursor cursor, String[] strings, int[] is) {
      super(context, rowContact, cursor, strings, is);
      this.context = context;
      this.c = cursor;

    }

    public View getView(int position, View convertView, ViewGroup parent) {
      View row = convertView;
      ContactRowWrapper wrapper;

      if (row == null) {
        LayoutInflater inflater=context.getLayoutInflater();
        row = inflater.inflate(R.layout.row_contact, null);
        //
        wrapper = new ContactRowWrapper(row);
        row.setTag(wrapper);
      } else {
        wrapper = (ContactRowWrapper)row.getTag();
      }
      c.moveToPosition(position);
      wrapper.getTextView().setText( c.getString(c.getColumnIndex(Contacts.People.NUMBER)) );
      wrapper.getcheckBox().setText( c.getString(c.getColumnIndex(Contacts.People.NAME)) );
      wrapper.getcheckBox().setChecked(getListView().isItemChecked(position));
      //
      return row;
    }

  }

对我来说，让复选框正常工作的关键代码是:

wrapper.getcheckBox().setChecked(getListView().isItemChecked(position));

希望这对您或任何偶然发现这个问题的人有所帮助。

另外，请原谅我的 Java 菜鸟...我几周前才开始使用 Java。

关于Android 使用游标适配器在 ListView 中保存复选框状态，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2406937/