Android访问网络数据的几种方式Demo

Android应用经常会和服务器端交互，这就需要手机客户端发送网络请求，下面介绍四种常用网络请求方式，我这边是通过Android单元测试来完成这四种方法的，还不清楚Android的单元测试的同学们请看Android开发技巧总结中的Android单元测试的步骤一文。
java.net包中的HttpURLConnection类
Get方式：
[java] view plaincopyprint?
// Get方式请求  
public static void requestByGet() throws Exception {  
   String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";  
   // 新建一个URL对象  
   URL url = new URL(path);  
   // 打开一个HttpURLConnection连接  
   HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
   // 设置连接超时时间  
   urlConn.setConnectTimeout(5 * 1000);  
   // 开始连接  
   urlConn.connect();  
   // 判断请求是否成功  
   if (urlConn.getResponseCode() == HTTP_200) {  
       // 获取返回的数据  
       byte[] data = readStream(urlConn.getInputStream());  
       Log.i(TAG_GET, "Get方式请求成功，返回数据如下：");  
       Log.i(TAG_GET, new String(data, "UTF-8"));  
   } else {  
       Log.i(TAG_GET, "Get方式请求失败");  
   }  
   // 关闭连接  
   urlConn.disconnect();  
}  
// Get方式请求
public static void requestByGet() throws Exception {
	String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
	// 新建一个URL对象
	URL url = new URL(path);
	// 打开一个HttpURLConnection连接
	HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
	// 设置连接超时时间
	urlConn.setConnectTimeout(5 * 1000);
	// 开始连接
	urlConn.connect();
	// 判断请求是否成功
	if (urlConn.getResponseCode() == HTTP_200) {
		// 获取返回的数据
		byte[] data = readStream(urlConn.getInputStream());
		Log.i(TAG_GET, "Get方式请求成功，返回数据如下：");
		Log.i(TAG_GET, new String(data, "UTF-8"));
	} else {
		Log.i(TAG_GET, "Get方式请求失败");
	}
	// 关闭连接
	urlConn.disconnect();
}
 
Post方式：
[java] view plaincopyprint?
// Post方式请求  
public static void requestByPost() throws Throwable {  
   String path = "https://reg.163.com/logins.jsp";  
   // 请求的参数转换为byte数组  
   String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")  
           + "&pwd=" + URLEncoder.encode("android", "UTF-8");  
   byte[] postData = params.getBytes();  
   // 新建一个URL对象  
   URL url = new URL(path);  
   // 打开一个HttpURLConnection连接  
   HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
   // 设置连接超时时间  
   urlConn.setConnectTimeout(5 * 1000);  
   // Post请求必须设置允许输出  
   urlConn.setDoOutput(true);  
   // Post请求不能使用缓存  
   urlConn.setUseCaches(false);  
   // 设置为Post请求  
   urlConn.setRequestMethod("POST");  
   urlConn.setInstanceFollowRedirects(true);  
   // 配置请求Content-Type  
   urlConn.setRequestProperty("Content-Type",  
           "application/x-www-form-urlencode");  
   // 开始连接  
   urlConn.connect();  
   // 发送请求参数  
   DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());  
   dos.write(postData);  
   dos.flush();  
   dos.close();  
   // 判断请求是否成功  
   if (urlConn.getResponseCode() == HTTP_200) {  
       // 获取返回的数据  
       byte[] data = readStream(urlConn.getInputStream());  
       Log.i(TAG_POST, "Post请求方式成功，返回数据如下：");  
       Log.i(TAG_POST, new String(data, "UTF-8"));  
   } else {  
       Log.i(TAG_POST, "Post方式请求失败");  
   }  
}  
// Post方式请求
public static void requestByPost() throws Throwable {
	String path = "https://reg.163.com/logins.jsp";
	// 请求的参数转换为byte数组
	String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")
			+ "&pwd=" + URLEncoder.encode("android", "UTF-8");
	byte[] postData = params.getBytes();
	// 新建一个URL对象
	URL url = new URL(path);
	// 打开一个HttpURLConnection连接
	HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
	// 设置连接超时时间
	urlConn.setConnectTimeout(5 * 1000);
	// Post请求必须设置允许输出
	urlConn.setDoOutput(true);
	// Post请求不能使用缓存
	urlConn.setUseCaches(false);
	// 设置为Post请求
	urlConn.setRequestMethod("POST");
	urlConn.setInstanceFollowRedirects(true);
	// 配置请求Content-Type
	urlConn.setRequestProperty("Content-Type",
			"application/x-www-form-urlencode");
	// 开始连接
	urlConn.connect();
	// 发送请求参数
	DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());
	dos.write(postData);
	dos.flush();
	dos.close();
	// 判断请求是否成功
	if (urlConn.getResponseCode() == HTTP_200) {
		// 获取返回的数据
		byte[] data = readStream(urlConn.getInputStream());
		Log.i(TAG_POST, "Post请求方式成功，返回数据如下：");
		Log.i(TAG_POST, new String(data, "UTF-8"));
	} else {
		Log.i(TAG_POST, "Post方式请求失败");
	}
}  
 
org.apache.http包中的HttpGet和HttpPost类
 
Get方式：
 
[java] view plaincopyprint?
// HttpGet方式请求  
public static void requestByHttpGet() throws Exception {  
   String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";  
   // 新建HttpGet对象  
   HttpGet httpGet = new HttpGet(path);  
   // 获取HttpClient对象  
   HttpClient httpClient = new DefaultHttpClient();  
   // 获取HttpResponse实例  
   HttpResponse httpResp = httpClient.execute(httpGet);  
   // 判断是够请求成功  
   if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {  
       // 获取返回的数据  
       String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");  
       Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下：");  
       Log.i(TAG_HTTPGET, result);  
   } else {  
       Log.i(TAG_HTTPGET, "HttpGet方式请求失败");  
   }  
}  
// HttpGet方式请求
public static void requestByHttpGet() throws Exception {
	String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
	// 新建HttpGet对象
	HttpGet httpGet = new HttpGet(path);
	// 获取HttpClient对象
	HttpClient httpClient = new DefaultHttpClient();
	// 获取HttpResponse实例
	HttpResponse httpResp = httpClient.execute(httpGet);
	// 判断是够请求成功
	if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
		// 获取返回的数据
		String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
		Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下：");
		Log.i(TAG_HTTPGET, result);
	} else {
		Log.i(TAG_HTTPGET, "HttpGet方式请求失败");
	}
}
 
Post方式：
[java] view plaincopyprint?
// HttpPost方式请求  
public static void requestByHttpPost() throws Exception {  
   String path = "https://reg.163.com/logins.jsp";  
   // 新建HttpPost对象  
   HttpPost httpPost = new HttpPost(path);  
   // Post参数  
   List<NameValuePair> params = new ArrayList<NameValuePair>();  
   params.add(new BasicNameValuePair("id", "helloworld"));  
   params.add(new BasicNameValuePair("pwd", "android"));  
   // 设置字符集  
   HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);  
   // 设置参数实体  
   httpPost.setEntity(entity);  
   // 获取HttpClient对象  
   HttpClient httpClient = new DefaultHttpClient();  
   // 获取HttpResponse实例  
   HttpResponse httpResp = httpClient.execute(httpPost);  
   // 判断是够请求成功  
   if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {  
       // 获取返回的数据  
       String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");  
       Log.i(TAG_HTTPGET, "HttpPost方式请求成功，返回数据如下：");  
       Log.i(TAG_HTTPGET, result);  
   } else {  
       Log.i(TAG_HTTPGET, "HttpPost方式请求失败");  
   }  
}