Android添加书签(二)(20)

    } 
 
    /**
     * Get the row id associated with the specified position in the list.
     * 
     * @param position
     *            Index of the item whose row id we want.
     * @return The id of the item at the specified position.
     */ 
    public long getItemId(int position) { 
        return position; 
    } 
 
    int mCurrentSelection = -1; 
 
    public void setSelected(int position) { 
        mCurrentSelection = position; 
        notifyDataSetInvalidated(); 
    } 
 
    /**
     * Get a View that displays the data at the specified position in the list.
     * 
     * @param position
     *            Index of the item whose view we want.
     * @return A View corresponding to the data at the specified position.
     */ 
    public View getView(int position, View convertView, ViewGroup parent) { 
        if (!mDataValid) { 
            throw new IllegalStateException( 
                    "this should only be called when the cursor is valid"); 
        } 
        if (position < 0 || position > mCount) { 
            throw new AssertionError( 
                    "BrowserBookmarksAdapter tried to get a view out of range"); 
        } 
 
        if (convertView == null) { 
            convertView = new BookmarkItem(mBookmarker); 
        } 
        bind((BookmarkItem) convertView, position); 
        if (position == mCurrentSelection) {