大部分安卓項目開發中,網絡請求都是用封裝好的網絡框架,如:okhttp、nohttp、volley等。導致基礎的HttpURLConnection和HttpClient基本不會自己寫了,基于安卓6.0SDK刪除了HttpClient了,因此只回顧一下HttpURLConnection的用法。
Get方式:
// Get方式請求
public static void requestByGet() throws Exception {
String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
// 新建一個URL對象
URL url = new URL(path);
// 打開一個HttpURLConnection連接
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
// 設置連接超時時間
urlConn.setConnectTimeout(5 * 1000);
// 開始連接
urlConn.connect();
// 判斷請求是否成功
if (urlConn.getResponseCode() == HTTP_200) {
// 獲取返回的數據
byte[] data = readStream(urlConn.getInputStream());
Log.i(TAG_GET, "Get方式請求成功,返回數據如下:");
Log.i(TAG_GET, new String(data, "UTF-8"));
} else {
Log.i(TAG_GET, "Get方式請求失敗");
}
// 關閉連接
urlConn.disconnect();
}
Post方式:
// Post方式請求
public static void requestByPost() throws Throwable {
String path = "https://reg.163.com/logins.jsp";
// 請求的參數轉換為byte數組
String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")
+ "&pwd=" + URLEncoder.encode("android", "UTF-8");
byte[] postData = params.getBytes();
// 新建一個URL對象
URL url = new URL(path);
// 打開一個HttpURLConnection連接
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
// 設置連接超時時間
urlConn.setConnectTimeout(5 * 1000);
// Post請求必須設置允許輸出
urlConn.setDoOutput(true);
// Post請求不能使用緩存
urlConn.setUseCaches(false);
// 設置為Post請求
urlConn.setRequestMethod("POST");
urlConn.setInstanceFollowRedirects(true);
// 配置請求Content-Type
urlConn.setRequestProperty("Content-Type",
"application/x-www-form-urlencode");
// 開始連接
urlConn.connect();
// 發送請求參數
DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());
dos.write(postData);
dos.flush();
dos.close();
// 判斷請求是否成功
if (urlConn.getResponseCode() == HTTP_200) {
// 獲取返回的數據
byte[] data = readStream(urlConn.getInputStream());
Log.i(TAG_POST, "Post請求方式成功,返回數據如下:");
Log.i(TAG_POST, new String(data, "UTF-8"));
} else {
Log.i(TAG_POST, "Post方式請求失敗");
}
}