Android中的幾種網路請求方式詳解

Android應用經常會和伺服器端互動，這就需要手機客戶端傳送網路請求，下面介紹四種常用網路請求方式，我這邊是通過Android單元測試來完成這四種方法的，還不清楚Android的單元測試的同學們請看Android開發技巧總結中的Android單元測試的步驟一文。

java.net包中的HttpURLConnection類

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物件
URL url = new URL(path);
// 開啟一個HttpURLConnection連線
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
// 設定連線超時時間
urlConn.setConnectTimeout(5 * 1000);
// 開始連線
urlConn.connect();
// 判斷請求是否成功
if (urlConn.getResponseCode() == HTTP_200) {
// 獲取返回的資料
byte[] data = readStream(urlConn.getInputStream());
Log.i(TAG_GET, "Get方式請求成功，返回資料如下：");
Log.i(TAG_GET, new String(data, "UTF-8"));
} else {
Log.i(TAG_GET, "Get方式請求失敗");
}
// 關閉連線
urlConn.disconnect();
}

Post方式：

// Post方式請求
public static void requestByPost() throws Throwable {
String path = "https://reg.163.com/logins.jsp";
// 請求的引數轉換為byte陣列
String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")
+ "&pwd=" + URLEncoder.encode("android", "UTF-8");
byte[] postData = params.getBytes();
// 新建一個URL物件
URL url = new URL(path);
// 開啟一個HttpURLConnection連線
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
// 設定連線超時時間
urlConn.setConnectTimeout(5 * 1000);
// Post請求必須設定允許輸出
urlConn.setDoOutput(true);
// Post請求不能使用快取
urlConn.setUseCaches(false);
// 設定為Post請求
urlConn.setRequestMethod("POST");
urlConn.setInstanceFollowRedirects(true);
// 配置請求Content-Type
urlConn.setRequestProperty("Content-Type",
"application/x-www-form-urlencode");
// 開始連線
urlConn.connect();
// 傳送請求引數
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) {
// 獲取返回的資料
byte[] data = readStream(urlConn.getInputStream());
Log.i(TAG_POST, "Post請求方式成功，返回資料如下：");
Log.i(TAG_POST, new String(data, "UTF-8"));
} else {
Log.i(TAG_POST, "Post方式請求失敗");
}
}

org.apache.http包中的HttpGet和HttpPost類

// HttpGet方式請求
public static void requestByHttpGet() throws Exception {
String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
// 新建HttpGet物件
HttpGet httpGet = new HttpGet(path);
// 獲取HttpClient物件
HttpClient httpClient = new DefaultHttpClient();
// 獲取HttpResponse例項
HttpResponse httpResp = httpClient.execute(httpGet);
// 判斷是夠請求成功
if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
// 獲取返回的資料
String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
Log.i(TAG_HTTPGET, "HttpGet方式請求成功，返回資料如下：");
Log.i(TAG_HTTPGET, result);
} else {
Log.i(TAG_HTTPGET, "HttpGet方式請求失敗");
}
}

Post方式：

// HttpPost方式請求
public static void requestByHttpPost() throws Exception {
String path = "https://reg.163.com/logins.jsp";
// 新建HttpPost物件
HttpPost httpPost = new HttpPost(path);
// Post引數
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("id", "helloworld"));
params.add(new BasicNameValuePair("pwd", "android"));
// 設定字符集
HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
// 設定引數實體
httpPost.setEntity(entity);
// 獲取HttpClient物件
HttpClient httpClient = new DefaultHttpClient();
// 獲取HttpResponse例項
HttpResponse httpResp = httpClient.execute(httpPost);
// 判斷是夠請求成功
if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
// 獲取返回的資料
String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
Log.i(TAG_HTTPGET, "HttpPost方式請求成功，返回資料如下：");
Log.i(TAG_HTTPGET, result);
} else {
Log.i(TAG_HTTPGET, "HttpPost方式請求失敗");
}
}