求教android http协议访问网络判断连接超时访问失败读取超时等等的一些方法语句

Question

如题
先贴出我的代码

public String urlCon(final String input) {
Looper.prepare();
try {
URL url = new URL(PATH + input);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(1000);
connection.setReadTimeout(8000);
connection.setRequestMethod("GET");
connection.setUseCaches(false);
connection.setDoOutput(true);
connection.setDoInput(true);
OutputStream outputStream = connection.getOutputStream();
outputStream.flush();
connection.getResponseCode();
InputStream in = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));

        StringBuilder response = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            response.append(line);
        }
        Log.i("返回的数据是 ", response.toString());
        Message message = new Message();
        if (connection.getConnectTimeout() == 5000) {
            message.what = 01234;
            handler.sendEmptyMessage(message.what);
        }
        if (connection.getConnectTimeout() > 1000) {
            message.what = 02234;
            handler.sendEmptyMessage(message.what);
        }

    } catch (MalformedURLException e1) {
        e1.printStackTrace();
    } catch (ProtocolException e1) {
        e1.printStackTrace();
    } catch (IOException e1) {
        e1.printStackTrace();
    }
    Looper.loop();
    return null;
}

我在打印请求服务器后返回的数据后面又加了一个message方法 想设置我上面说的和其他的一些访问网络可能出现的情况的条件 连接失败，超时，读数据失败，超时，请求出错等等，请问这些方法的语句是怎么样的呢？求大神指导一下。。。万分感谢！！！！！

Answer 1

去看下http的api，最全的资料