一段时间以来，我一直陷入这个特殊的困境，我搜索了该站点并找到了一些帮助，但不是针对我的特定问题。我正在尝试连接到一个网站以从中提取 JSON 数据。主持人是我不确定的：
DefaultHttpClient client = new DefaultHttpClient();
HttpHost targetHost = new HttpHost("www.wunderground.com", 80);
HttpGet httpGet = new HttpGet(urllink); // urllink is "api.wunderground.com/api/my_key/conditions/forecast/hourly/alerts/q/32256.json"
httpGet.setHeader("Accept", "application/json");
httpGet.setHeader("Content-type", "application/json");
HttpResponse response = client.execute(targetHost, httpGet);
HttpEntity entity = response.getEntity();
InputStream instream = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder stringBuilder = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
stringBuilder.append(line + "\n");
}
} catch (Exception e) {
// print stacktrace
return null;
} finally {
try {
instream.close();
} catch (Exception e) {
// print stacktrace
return null;
}
}
return stringBuilder.toString();
主机可以是www.wunderground.com或api.wunderground.com，但是当我尝试其中任何一个时，我都会得到Unknown host exception。
我发现了错误。那是我在android清单中没有权限！