你可以尝试加载使用HttpClient的favicons。 F.e .:
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
..........
ArrayList<String> list; //list of target urls
HttpClient httpclient = new DefaultHttpClient();
final int size = list.size();
for (int i = 0; i < size; ++i) {
try {
String pure_url = extractPureUrl(url);
HttpResponse response = httpclient.execute(new HttpGet(pure_url + "/favicon.ico"));
if (response.getEntity() != null) {
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
byte[] image_bytes = out.toByteArray();
bmp = BitmapFactory.decodeStream(new ByteArrayInputStream(image_bytes));
if (bmp != null) {
//do smth with received bitmap
}
} else {
response.getEntity().consumeContent();
}
}
} catch (ClientProtocolException e) {
//log error
} catch (IOException e) {
//log error
}
}
private static final String EXTENDED_HTTP_PREFIX = "http://www.";
private static final String HTTP_PREFIX = "http://";
/** Converts http://abc.com/xxx and http://www.abc.com/xxx to http://abc.com */
private static String extractPureUrl(String srcUrl) {
String sw = srcUrl.toLowerCase();
String s = sw.startsWith(EXTENDED_HTTP_PREFIX)
? sw.substring(EXTENDED_HTTP_PREFIX.length())
: sw.startsWith(BookmarkInfo.HTTP_PREFIX)
? sw.substring(BookmarkInfo.HTTP_PREFIX.length())
: sw;
int n = s.indexOf('/');
if (n == -1) return srcUrl;
return HTTP_PREFIX + s.substring(0, n);
}
这里有一个潜在的问题 - ico format is not supported officially by Android。实际上,BitmapFactory在大多数设备上解码ico格式没有任何问题。无论如何,我不确定它会在所有设备上解码ico。
谢谢,但这不是我的意思。我想在用户使用浏览器访问此URL之前检索书签缩略图,这意味着我需要模拟对此页面的请求并以某种方式检索生成的缩略图。 (可以在LauncherPro支付的书签小部件设置中找到示例)。 – 2011-01-26 14:10:09