ListView复用导致图片错乱及闪烁问题

关于ViewHolder复用，我就不说明了，关键是复用导致出现的问题

网络的好坏，我们请求的图片并不是很稳定，那么我们假设一屏可以显示6条数据，利用复用，我们的第7条数据view就是我们的第1条数据view，随之手势不断的滑动，复用的问题，就出现，特别是上网请求网络图片， 我们在显示第7条数据时，图片还是第1个数据图片，因为第7条很可以没有加载完成，导致view复用，图片错乱，那么如何解决呢

给每个 ImageView设置tag ,tag 的内容就是唯一的url

异步加载类中输入url

在异步加载类，完成后，对比ImageView的tag与url是否一致

一致就设置图片，不一致，就不设置，同时setImageBitmap(null)来解决闪烁问题

public class Myadapter extends BaseAdapter {

private List<Info.DataBean> list;

public Myadapter(List<Info.DataBean> list) {
this.list = list;
}

@Override
public int getCount() {
return list == null ? 0 : list.size();
}

@Override
public Object getItem(int position) {
return list.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

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

Info.DataBean bean = list.get(position);
MyViewHolder viewHolder = null;
if (convertView == null) {
convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
viewHolder = new MyViewHolder();
viewHolder.iv = (ImageView) convertView.findViewById(R.id.iv);
viewHolder.cb = (CheckBox) convertView.findViewById(R.id.cb);
viewHolder.title = (TextView) convertView.findViewById(R.id.item_title);
convertView.setTag(viewHolder);
} else {
viewHolder = (MyViewHolder) convertView.getTag();
}

viewHolder.title.setText(bean.getTitle());
viewHolder.iv.setTag(bean.getImgs().get(0)); //内容为url的tag
viewHolder.iv.setImageBitmap(null);  //解决闪烁
new MyNet(viewHolder.iv).execute(bean.getImgs().get(0)); //加载类中url为图片的url

return convertView;
}

static class MyViewHolder {
private ImageView iv;
private TextView title;
private CheckBox cb;
}

class MyNet extends AsyncTask<String, Void, byte[]> {

private ImageView iv;
private String path;
public MyNet(ImageView imageView) {
this.iv = imageView;
}
@Override
protected byte[] doInBackground(String... params) {
try {
URL url = new URL(params[0]);
path = params[0];
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("GET");
con.setConnectTimeout(5000);
con.setReadTimeout(5000);
con.connect();
if (con.getResponseCode() == HttpURLConnection.HTTP_OK && !isCancelled()) {
InputStream inputStream = con.getInputStream();
int len;
byte[] buff = new byte[1024 * 4];
ByteArrayOutputStream bao = new ByteArrayOutputStream();
while ((len = inputStream.read(buff)) != -1) {
bao.write(buff, 0, len);
}
inputStream.close();
return bao.toByteArray();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
};

@Override
protected void onPostExecute(byte[] bytes) {
super.onPostExecute(bytes);
if (bytes != null && iv.getTag().equals(path)) { //加载类中，回来直接判断是不是最新的tag 也 就是最新滑动的item
iv.setImageBitmap(BitmapFactory.decodeByteArray(bytes,0,bytes.length));
}
}
}
}