我正在为列表视图执行lazyload代码,在该代码中,我在json中获取文本和图像url,并将它们放入列表视图中.

图像和文本都相应显示为我想要的.

我面临的问题是当列表向下或向上滚动时,视图的索引受到干扰.

假设我的列表中有10个元素,其中图像横向预览.最初,我可以看到4个元素的onclick效果很好,
但是,当我向下滚动并单击第7个或第8个元素时,索引会受到干扰并导致空指针异常.

   l2.setOnItemClickListener(new OnItemClickListener() {
    @Override
     public void onItemClick(AdapterView<?> parent, View view,int position, long id) 
        {
            View curr = parent.getChildAt((int) id);
            TextView c = (TextView)curr.findViewById(R.id.text);
            String sel_item = c.getText().toString();
            Intent intent = new Intent(SubCatListActivity.this,GridActivity.class);
             adapter.imageLoader.clearCache();
            intent.putExtra("gall", sel_item);
            intent.putExtra("cate", cate);
            startActivity(intent);
            Toast.makeText(SubCatListActivity.this,sel_item, Toast.LENGTH_SHORT).show();

         }});

问题似乎与textview有关,因为我无法在列表的onclick上获得所需的文本.

如果我触摸第6个元素,则会得到第7或第8个项目的文本.

解决方法:

您可以尝试将此行更改为

TextView c = (TextView) view.findViewById(R.id.text);

并删除第一行View curr = parent.getChildAt((int)id);

l2.setOnItemClickListener(new OnItemClickListener() {
@Override
 public void onItemClick(AdapterView<?> parent, View view,int position, long id) 
    {

        TextView c = (TextView) view.findViewById(R.id.text);
        String sel_item = c.getText().toString();
        Intent intent = new Intent(SubCatListActivity.this,GridActivity.class);
         adapter.imageLoader.clearCache();
        intent.putExtra("gall", sel_item);
        intent.putExtra("cate", cate);
        startActivity(intent);
        Toast.makeText(SubCatListActivity.this,sel_item, Toast.LENGTH_SHORT).show();

     }});