Android中的幾種網絡請求方式詳解

Android應用經常會和服務器端交互，這就需要手機客戶端發送網絡請求，下面介紹四種常用網絡請求方式，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");
    }
}

org.apache.http包中的HttpGet和HttpPost類

Get方式：

// 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對象
    HttpGet httpGet = new HttpGet(path);
    // 獲取HttpClient對象
    HttpClient httpClient = new DefaultHttpClient();
    // 獲取HttpResponse實例
    HttpResponse httpResp = httpClient.execute(httpGet);
    // 判斷是夠請求成功
    if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
        // 獲取返回的數據
        String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
        Log.i(TAG_HTTPGET, "HttpGet方式請求成功，返回數據如下：");
        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對象
    HttpPost httpPost = new HttpPost(path);
    // Post參數
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("id", "helloworld"));
    params.add(new BasicNameValuePair("pwd", "android"));
    // 設置字符集
    HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
    // 設置參數實體
    httpPost.setEntity(entity);
    // 獲取HttpClient對象
    HttpClient httpClient = new DefaultHttpClient();
    // 獲取HttpResponse實例
    HttpResponse httpResp = httpClient.execute(httpPost);
    // 判斷是夠請求成功
    if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
        // 獲取返回的數據
        String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
        Log.i(TAG_HTTPGET, "HttpPost方式請求成功，返回數據如下：");
        Log.i(TAG_HTTPGET, result);
    } else {
        Log.i(TAG_HTTPGET, "HttpPost方式請求失敗");
    }
}

以上是一些部分代碼，測試的時候在測試類中運行對應的測試方法即可。完整代碼點這里下載

文章出處：http://blog.csdn.net/zuolongsnail/article/details/6373051