Android: getView() appelé deux fois dans la coutume adaptateur

Je suis réglage personnalisé SimpleCursorAdapter à une ListView. Pour une raison quelconque FriendAdapter de getView() est appelée deux fois pour chaque élément dans la DB. Après quelques recherches (je n'ai pas wrap_content dans mon contact_list.xml), je ne parviens toujours pas à comprendre pourquoi.

Quelles peuvent être les raisons? Quelqu'un peut m'aider?

Grâce

ContactSelection.java

public class ContactSelection extends ListActivity {

    private WhipemDBAdapter mDbHelper;  

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mDbHelper = new WhipemDBAdapter(this);
        mDbHelper.open();     

        setContentView(R.layout.contact_list);        

        Cursor c = mDbHelper.fetchAllFriends();
        startManagingCursor(c);     
        String[] from = new String[] {};
        int[] to = new int[] {};

        setListAdapter(new FriendAdapter(this, R.layout.contact_row, c, from, to));

        getListView().setItemsCanFocus(false);
        getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mDbHelper.open();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mDbHelper.close();
    }
}

FriendAdapter.java

public class FriendAdapter extends SimpleCursorAdapter implements OnClickListener {
private Context mContext;
private int mLayout;
private Cursor mCursor;
private int mNameIndex;
private int mIdIndex;
private LayoutInflater mLayoutInflater; 
private final ImageDownloader imageDownloader = new ImageDownloader();  
private final class ViewHolder {
public TextView name;
public ImageView image;
public CheckBox checkBox;
}
public FriendAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
super(context, layout, c, from, to);
this.mContext = context;
this.mLayout = layout;
this.mCursor = c;
this.mNameIndex = mCursor.getColumnIndex(WhipemDBAdapter.KEY_NAME);
this.mIdIndex = mCursor.getColumnIndex(WhipemDBAdapter.KEY_FB_ID);
this.mLayoutInflater = LayoutInflater.from(context);        
}
public View getView(int position, View convertView, ViewGroup parent) {
if (mCursor.moveToPosition(position)) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = mLayoutInflater.inflate(mLayout, null);
viewHolder = new ViewHolder();
viewHolder.name = (TextView) convertView.findViewById(R.id.contact_name);
viewHolder.image = (ImageView) convertView.findViewById(R.id.contact_pic);
viewHolder.checkBox = (CheckBox) convertView.findViewById(R.id.checkbox);
viewHolder.checkBox.setOnClickListener(this);
convertView.setTag(viewHolder);
}
else {
viewHolder = (ViewHolder) convertView.getTag();
}
String name = mCursor.getString(mNameIndex);
String fb_id = mCursor.getString(mIdIndex);         
boolean isChecked = ((GlobalVars) mContext.getApplicationContext()).isFriendSelected(fb_id);
viewHolder.name.setText(name);
imageDownloader.download("http://graph.facebook.com/"+fb_id+"/picture", viewHolder.image);
viewHolder.checkBox.setTag(fb_id);
viewHolder.checkBox.setChecked(isChecked);
}
return convertView;
}
@Override
public void onClick(View v) {
CheckBox cBox = (CheckBox) v;
String fb_id = (String) cBox.getTag();
if (cBox.isChecked()) {
if (!((GlobalVars) mContext.getApplicationContext()).isFriendSelected(fb_id))
((GlobalVars) mContext.getApplicationContext()).addSelectedFriend(fb_id);
} else {
if (((GlobalVars) mContext.getApplicationContext()).isFriendSelected(fb_id))
((GlobalVars) mContext.getApplicationContext()).removeSelectedFriend(fb_id);
}
}
}

contact_row.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="@+id/contact_pic"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/contact_name"        
android:textSize="10sp"
android:singleLine="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<CheckBox
android:id="@+id/checkbox"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>

contact_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<TextView
android:id="@+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="No items"/>
</LinearLayout>

OriginalL'auteur jul | 2011-03-08