在listview点击事件获取长度出现IndexOutOfBoundsException

private List<RedRecordsBean.DataEntity.PageEntity> page;

listrds.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

//这是错误的RedRecordsBean.DataEntity.PageEntity pageEntity = page.get(position);

        RedRecordsBean.DataEntity.PageEntity entity = (RedRecordsBean.DataEntity.PageEntity) parent.getAdapter().getItem(position);
        if (entity.getPacketType() == 4) {//转发红包
            if (!TextUtils.isEmpty(entity.getGourl())) {
                HtmlForwardActivity.toMe(mContext, entity.getArticleId(), entity.getPacketId(), entity.getGourl(), entity.getTitle(), entity.getContent(), entity.getIcon(), entity.getShareUrl(), entity.getShareImg(), entity.getShareSwitch(), true);
            }
        } else if (entity.getPacketType() == 5) {//阅读红包
            if (!TextUtils.isEmpty(entity.getGourl())) {
                Intent intent = new Intent(mContext, HtmlReadingActivity.class);
                intent.putExtra("packetId", entity.getPacketId());
                intent.putExtra("goUrl", entity.getGourl());
                mContext.startActivity(intent);
                overridePendingTransition(R.anim.bottom_in, R.anim.bottom_silent);
            }
        } else if (entity.getPacketType() == 6) {//商讯红包
            Intent intent = new Intent(mContext, BusinessMessageActivity.class);
            intent.putExtra("flag", 1);
            intent.putExtra("packetId", entity.getPacketId());
            intent.putExtra("shareUrl", entity.getShareUrl());
            intent.putExtra("title", entity.getTitle());
            intent.putExtra("content", entity.getContent());
            intent.putExtra("icon", entity.getIcon());
            intent.putExtra("shareImg", entity.getShareImg());
            intent.putExtra("shareSwich", entity.getShareSwitch());
            startActivity(intent);
        }
    }
});

这是我写的一个listview点击事件，主要的问题是在获取集合长度的时候从集合里直接去索引会出现数组下边越界，page.get(position)，

解决方法最好是在适配器中获取parent.getAdapter().getItem(position)，这样就不会出现这样的问题了。在这里做出记录。