Android网络请求
2015-12-18 21:55
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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 plaincopy
01.// Get方式请求
02.public static void requestByGet() throws Exception {
03. String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
04. // 新建一个URL对象
05. URL url = new URL(path);
06. // 打开一个HttpURLConnection连接
07. HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
08. // 设置连接超时时间
09. urlConn.setConnectTimeout(5 * 1000);
10. // 开始连接
11. urlConn.connect();
12. // 判断请求是否成功
13. if (urlConn.getResponseCode() == HTTP_200) {
14. // 获取返回的数据
15. byte[] data = readStream(urlConn.getInputStream());
16. Log.i(TAG_GET, "Get方式请求成功，返回数据如下：");
17. Log.i(TAG_GET, new String(data, "UTF-8"));
18. } else {
19. Log.i(TAG_GET, "Get方式请求失败");
20. }
21. // 关闭连接
22. urlConn.disconnect();
23.}
Post方式：
[java] view plaincopy
01.// Post方式请求
02.public static void requestByPost() throws Throwable {
03. String path = "https://reg.163.com/logins.jsp";
04. // 请求的参数转换为byte数组
05. String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")
06. + "&pwd=" + URLEncoder.encode("android", "UTF-8");
07. byte[] postData = params.getBytes();
08. // 新建一个URL对象
09. URL url = new URL(path);
10. // 打开一个HttpURLConnection连接
11. HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
12. // 设置连接超时时间
13. urlConn.setConnectTimeout(5 * 1000);
14. // Post请求必须设置允许输出
15. urlConn.setDoOutput(true);
16. // Post请求不能使用缓存
17. urlConn.setUseCaches(false);
18. // 设置为Post请求
19. urlConn.setRequestMethod("POST");
20. urlConn.setInstanceFollowRedirects(true);
21. // 配置请求Content-Type
22. urlConn.setRequestProperty("Content-Type",
23. "application/x-www-form-urlencode");
24. // 开始连接
25. urlConn.connect();
26. // 发送请求参数
27. DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());
28. dos.write(postData);
29. dos.flush();
30. dos.close();
31. // 判断请求是否成功
32. if (urlConn.getResponseCod
4000
e() == HTTP_200) {
33. // 获取返回的数据
34. byte[] data = readStream(urlConn.getInputStream());
35. Log.i(TAG_POST, "Post请求方式成功，返回数据如下：");
36. Log.i(TAG_POST, new String(data, "UTF-8"));
37. } else {
38. Log.i(TAG_POST, "Post方式请求失败");
39. }
40.}
org.apache.http包中的HttpGet和HttpPost类
Get方式：
[java] view plaincopy
01.// HttpGet方式请求
02.public static void requestByHttpGet() throws Exception {
03. String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
04. // 新建HttpGet对象
05. HttpGet httpGet = new HttpGet(path);
06. // 获取HttpClient对象
07. HttpClient httpClient = new DefaultHttpClient();
08. // 获取HttpResponse实例
09. HttpResponse httpResp = httpClient.execute(httpGet);
10. // 判断是够请求成功
11. if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
12. // 获取返回的数据
13. String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
14. Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下：");
15. Log.i(TAG_HTTPGET, result);
16. } else {
17. Log.i(TAG_HTTPGET, "HttpGet方式请求失败");
18. }
19.}
Post方式：
[java] view plaincopy
01.// HttpPost方式请求
02.public static void requestByHttpPost() throws Exception {
03. String path = "https://reg.163.com/logins.jsp";
04. // 新建HttpPost对象
05. HttpPost httpPost = new HttpPost(path);
06. // Post参数
07. List<NameValuePair> params = new ArrayList<NameValuePair>();
08. params.add(new BasicNameValuePair("id", "helloworld"));
09. params.add(new BasicNameValuePair("pwd", "android"));
10. // 设置字符集
11. HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
12. // 设置参数实体
13. httpPost.setEntity(entity);
14. // 获取HttpClient对象
15. HttpClient httpClient = new DefaultHttpClient();
16. // 获取HttpResponse实例
17. HttpResponse httpResp = httpClient.execute(httpPost);
18. // 判断是够请求成功
19. if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
20. // 获取返回的数据
21. String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
22. Log.i(TAG_HTTPGET, "HttpPost方式请求成功，返回数据如下：");
23. Log.i(TAG_HTTPGET, result);
24. } else {
25. Log.i(TAG_HTTPGET, "HttpPost方式请求失败");
26. }
27.}
以上是一些部分代码，测试的时候在测试类中运行对应的测试方法即可。完整代码点这里下载
java.net包中的HttpURLConnection类
Get方式：
[java] view plaincopy
01.// Get方式请求
02.public static void requestByGet() throws Exception {
03. String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
04. // 新建一个URL对象
05. URL url = new URL(path);
06. // 打开一个HttpURLConnection连接
07. HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
08. // 设置连接超时时间
09. urlConn.setConnectTimeout(5 * 1000);
10. // 开始连接
11. urlConn.connect();
12. // 判断请求是否成功
13. if (urlConn.getResponseCode() == HTTP_200) {
14. // 获取返回的数据
15. byte[] data = readStream(urlConn.getInputStream());
16. Log.i(TAG_GET, "Get方式请求成功，返回数据如下：");
17. Log.i(TAG_GET, new String(data, "UTF-8"));
18. } else {
19. Log.i(TAG_GET, "Get方式请求失败");
20. }
21. // 关闭连接
22. urlConn.disconnect();
23.}
Post方式：
[java] view plaincopy
01.// Post方式请求
02.public static void requestByPost() throws Throwable {
03. String path = "https://reg.163.com/logins.jsp";
04. // 请求的参数转换为byte数组
05. String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")
06. + "&pwd=" + URLEncoder.encode("android", "UTF-8");
07. byte[] postData = params.getBytes();
08. // 新建一个URL对象
09. URL url = new URL(path);
10. // 打开一个HttpURLConnection连接
11. HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
12. // 设置连接超时时间
13. urlConn.setConnectTimeout(5 * 1000);
14. // Post请求必须设置允许输出
15. urlConn.setDoOutput(true);
16. // Post请求不能使用缓存
17. urlConn.setUseCaches(false);
18. // 设置为Post请求
19. urlConn.setRequestMethod("POST");
20. urlConn.setInstanceFollowRedirects(true);
21. // 配置请求Content-Type
22. urlConn.setRequestProperty("Content-Type",
23. "application/x-www-form-urlencode");
24. // 开始连接
25. urlConn.connect();
26. // 发送请求参数
27. DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());
28. dos.write(postData);
29. dos.flush();
30. dos.close();
31. // 判断请求是否成功
32. if (urlConn.getResponseCod
4000
e() == HTTP_200) {
33. // 获取返回的数据
34. byte[] data = readStream(urlConn.getInputStream());
35. Log.i(TAG_POST, "Post请求方式成功，返回数据如下：");
36. Log.i(TAG_POST, new String(data, "UTF-8"));
37. } else {
38. Log.i(TAG_POST, "Post方式请求失败");
39. }
40.}
org.apache.http包中的HttpGet和HttpPost类
Get方式：
[java] view plaincopy
01.// HttpGet方式请求
02.public static void requestByHttpGet() throws Exception {
03. String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
04. // 新建HttpGet对象
05. HttpGet httpGet = new HttpGet(path);
06. // 获取HttpClient对象
07. HttpClient httpClient = new DefaultHttpClient();
08. // 获取HttpResponse实例
09. HttpResponse httpResp = httpClient.execute(httpGet);
10. // 判断是够请求成功
11. if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
12. // 获取返回的数据
13. String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
14. Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下：");
15. Log.i(TAG_HTTPGET, result);
16. } else {
17. Log.i(TAG_HTTPGET, "HttpGet方式请求失败");
18. }
19.}
Post方式：
[java] view plaincopy
01.// HttpPost方式请求
02.public static void requestByHttpPost() throws Exception {
03. String path = "https://reg.163.com/logins.jsp";
04. // 新建HttpPost对象
05. HttpPost httpPost = new HttpPost(path);
06. // Post参数
07. List<NameValuePair> params = new ArrayList<NameValuePair>();
08. params.add(new BasicNameValuePair("id", "helloworld"));
09. params.add(new BasicNameValuePair("pwd", "android"));
10. // 设置字符集
11. HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
12. // 设置参数实体
13. httpPost.setEntity(entity);
14. // 获取HttpClient对象
15. HttpClient httpClient = new DefaultHttpClient();
16. // 获取HttpResponse实例
17. HttpResponse httpResp = httpClient.execute(httpPost);
18. // 判断是够请求成功
19. if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {
20. // 获取返回的数据
21. String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");
22. Log.i(TAG_HTTPGET, "HttpPost方式请求成功，返回数据如下：");
23. Log.i(TAG_HTTPGET, result);
24. } else {
25. Log.i(TAG_HTTPGET, "HttpPost方式请求失败");
26. }
27.}
以上是一些部分代码，测试的时候在测试类中运行对应的测试方法即可。完整代码点这里下载
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