深入分析Android中Listview显示错乱问题

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;

    if (convertView == null) {
        convertView = mLayout.inflate(R.layout....);
        holder = new ViewHolder();
        holder.textView = (TextView) convertView
                .findViewById(R.id.textview);
        ... ...
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.textView.setText(mText + position);
    return convertView;
}

/**
 * Responsible for fling behavior. Use {@link #start(int)} to
 * initiate a fling. Each frame of the fling is handled in {@link #run()}.
 * A FlingRunnable will keep re-posting itself until the fling is done.
 *
 */
private class FlingRunnable implements Runnable {
    /**
     * Tracks the decay of a fling scroll
     */
    private final OverScroller mScroller;
    ... ...
}