Java 如何在Android应用程序中访问web内容（POST/GET）？

我的要求与我的非常相似

基本上，我将在我的android应用程序中进行登录活动，当用户输入数据并单击登录时，我必须点击我的网站，验证用户，获取结果，并根据登录成功与否进一步指导用户

以下是我的问题

对于我来说，在android中实现上述功能有哪些选项？如何在活动中发布数据并获取结果

如果使用网络视图，这可以简化吗

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这很好。DroidFu是一个开源库，它提供了一个如何高效使用HttpClient的极好示例。您可以找到它。

您可以使用

HttpClient

发布到URI：

URI uri = URI.create("http://whatever.com/thingie");
HttpPost post = new HttpPost(uri);
StringEntity ent = new StringEntity("Here is my data!");
post.setEntity(ent);
HttpClient httpClient = new DefaultHttpClient();
HttpResponse response = httpClient.execute(request);

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您需要查看的所有内容都在包

org.apache.http.client

中。互联网上还有大量的示例可以帮助您。

让我来演示如何使用示例代码（示例代码取自我之前的一个答案）：

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再加上另外两个答案：如果你想使用WebView，它将是一个普通的web应用程序。在另一种情况下，请确保使用AsyncTask以避免阻塞UI线程。

public CookieStore sendPostData(String url, String user, String pass) {

   // Setup a HTTP client, HttpPost (that contains data you wanna send) and
   // a HttpResponse that gonna catch a response.
   DefaultHttpClient postClient = new DefaultHttpClient();
   HttpPost httpPost = new HttpPost(url);
   HttpResponse response;

   try {   

      // Make a List. Increase the size as you wish.
      List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);

      // Add your form name and a text that belongs to the actual form.
      nameValuePairs.add(new BasicNameValuePair("username_form", user));
      nameValuePairs.add(new BasicNameValuePair("password_form", pass));

      // Set the entity of your HttpPost.
      httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

      // Execute your request against the given url and catch the response.
      response = postClient.execute(httpPost);

      // Status code 200 == successfully posted data.
      if(response.getStatusLine().getStatusCode() == 200) {
         // Green light. Catch your cookies from your HTTP response.
         CookieStore cookies = postClient.getCookieStore(); 
         return cookies;
      }
   } catch (Exception e) {
   }
}  

CookieStore cookieStore = sendPostData("www.mypage.com/login", "Username", 
                                            "Password");

// Note, you may get more than one cookie, therefore this list.
List<Cookie> cookie = cookieStore.getCookies();

// Grab the name of your cookie.
String cookieOne = cookie.get(0).getName();

// Grab the domain of your cookie.
String cookieOneDomain = cookie.get(0).getDomain();

CookieSyncManager.createInstance(this);
CookieManager cookieManager = CookieManager.getInstance(); 
cookieManager.setAcceptCookie(true);

cookieManager.setCookie(cookieOneDomain, cookieOne);