发送 HTTP GET 请求

URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();

try {
    BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

    // read the input stream
    // in this case, I simply read the first line of the stream
    String line = br.readLine();
    Log.d("HTTP-GET", line);

} finally {
    connection.disconnect();
}

请注意，上述示例中未处理异常。一个完整的例子，包括（一个简单的）异常处理，将是：

URL url;
HttpURLConnection connection = null;

try {
    url = new URL("http://example.com");
    connection = (HttpURLConnection) url.openConnection();
    BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

    // read the input stream
    // in this case, I simply read the first line of the stream
    String line = br.readLine();
    Log.d("HTTP-GET", line);

} catch (IOException e) {
    e.printStackTrace();
} finally {
    if (connection != null) {
        connection.disconnect();
    }
}