我有一个 ListAdapter,其中包含一堆从互联网下载的图像。当我上下滚动时,性能似乎受到了影响,并且事情变得不稳定。我该如何解决这个问题?
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.message_row, null);
}
STMessage aMessage = messages.get(position);
if (aMessage != null) {
TextView usernameTextView = (TextView) v.findViewById(R.id.usernameTextView);
TextView bodyTextView = (TextView) v.findViewById(R.id.bodyTextView);
TextView dateTextView = (TextView) v.findViewById(R.id.dateTextView);
ImageView avatarImageView = (ImageView)v.findViewById(R.id.avatarImageView);
if (usernameTextView != null) {
usernameTextView.setText(Html.fromHtml(aMessage.getUser_login()));
}
if (bodyTextView != null) {
bodyTextView.setText(aMessage.getBody());
//linkify urls
Linkify.addLinks(bodyTextView, Linkify.WEB_URLS);
//linkify symbols
Pattern symbolMatcher = Pattern.compile("/(?:^|\\s|[\\.(\\+\\-\\,])(?:\\$?)\\$((?:[0-9]+(?=[a-z])|(?![0-9\\.\\:\\_\\-]))(?:[a-z0-9]|[\\_\\.\\-\\:](?![\\.\\_\\.\\-\\:]))*[a-z0-9]+)/i");
String symbolURL = "content://com.stocktwits.activity/symbol/";
Linkify.addLinks(bodyTextView, symbolMatcher, symbolURL);
}
if (dateTextView != null) {
dateTextView.setText(aMessage.getUpdated_at());
}
if (avatarImageView != null) {
imageDownloader.download(aMessage.getAvatar_url(), avatarImageView);
}
}
return v;
}
最佳答案
使用图像延迟加载 - Lazy load of images in ListView
关于java - 如何在 ListView 中无延迟地从网络下载图像?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/5762271/