Use the android built-in HTTP package for network requests

Reprinted from http://dai-lm.iteye.com/blog/1160191

1. Create a connection configuration class

1. Class useragentconfig {
2. Public String host;
3. Public String scheme = "HTTP ";
4. Public int Port = 80;
5. Public int timeoutconnection = 3000;
6. Public int timeoutsocket = 20000;
7. Public String username = "";
8. Public String Password = "";
9. }
   

2. encapsulate the request class

1. Public class httprequest {
3. /**
4. * Get "stream" as response only based on URL
5. *
6. * @ Param strurl
7. * @ Return
8. */
9. Public static inputstream getstream (string strurl ){
11. Inputstream input = NULL;
13. Try {
14. URL url = new URL (strurl );
15. Httpurlconnection urlcon = (httpurlconnection) URL. openconnection ();
16. Input = urlcon. getinputstream ();
17. } Catch (ioexception e ){
18. E. printstacktrace ();
19. }
21. Return input;
22. }
24. /**
25. * Get "stream" as response
26. *
27. * @ Param URL request URL
28. * @ Param config connection config
29. * @ Param Params parameter for post method
30. * @ Return response in stream
31. * @ Throws ioexception
32. * @ Throws illegalstateexception
33. */
34. Public static inputstream getstream (string URL, useragentconfig config,
35. List <basicnamevaluepair> Params ){
37. Httpentity entity = httprequest (URL, config, Params );
38. Inputstream ret = NULL;
40. If (entity! = NULL ){
41. Try {
42. Byte [] B = entityutils. tobytearray (entity );
43. Ret = new bytearrayinputstream (B );
44. } Catch (exception e ){
45. E. printstacktrace ();
46. } Finally {
47. Release (entity );
48. }
49. }
51. Return ret;
52. }
54. /**
55. * Get "string" as response
56. *
57. * @ Param URL
58. * @ Param config
59. * @ Param Params
60. * @ Return
61. */
62. Public static string getstring (string URL, useragentconfig config,
63. List <basicnamevaluepair> Params ){
65. Httpentity entity = httprequest (URL, config, Params );
66. String ret = NULL;
68. If (entity! = NULL ){
69. Try {
70. Ret = entityutils. tostring (entity );
71. } Catch (exception e ){
72. E. printstacktrace ();
73. } Finally {
74. Release (entity );
75. }
76. }
78. Return ret;
79. }
81. Private Static void release (httpentity entity ){
82. Try {
83. Entity. consumecontent ();
84. } Catch (ioexception e ){
85. E. printstacktrace ();
86. }
87. }
89. /**
90. * Get "httpentity" as response
91. *
92. * @ Param URL request URL
93. * @ Param config connection config
94. * @ Param Params parameter for post method
95. * @ Return
96. */
97. Private Static httpentity httprequest (string URL, useragentconfig config,
98. List <basicnamevaluepair> Params ){
100. Defaulthttpclient client = NULL;
101. Httpentity entity = NULL;
103. Try {
104. Basichttpparams httpparameters = new basichttpparams ();
106. // Set connection timeout
107. Httpconnectionparams. setconnectiontimeout (httpparameters,
108. Config. timeoutconnection );
109. Httpconnectionparams. setsotimeout (httpparameters,
110. Config. timeoutsocket );
112. Client = new defaulthttpclient (httpparameters );
114. // Retry 3 times
115. Defaulthttprequestretryhandler retryhandler = new defaulthttprequestretryhandler (3, true );
116. Client. sethttprequestretryhandler (retryhandler );
118. // Set username & password if available
119. If (! ("". Equals (config. username) & "". Equals (config. Password ))){
120. Authscope as = new authscope (config. Host, config. Port );
121. Usernamepasswordcredentials UPC = new usernamepasswordcredentials (
122. Config. username, config. Password );
124. Client. getcredentialsprovider (). setcredentials (AS, UPC );
125. }
127. Basichttpcontext localcontext = new basichttpcontext ();
129. Basicscheme basicauth = new basicscheme ();
130. Localcontext. setattribute ("preemptive-auth", basicauth );
132. Httphost targethost = new httphost (config. Host, config. Port,
133. Config. scheme );
135. // Check get or POST method by Params
136. Httprequestbase method = NULL;
137. If (Params = NULL ){
138. Method = new httpget (URL );
139. } Else {
140. Method = new httppost (URL );
141. (Httppost) method). setentity (New urlencodedformentity (Params,
142. "UTF-8 "));
143. }
144. Method. setheader ("Content-Type", "application/XML ");
146. Httpresponse response = client.exe cute (targethost, method,
147. Localcontext );
149. Entity = response. getentity ();
151. } Catch (exception e ){
152. E. printstacktrace ();
153. }
155. Return entity;
156. }
157. }
     

3. Call
GET request

1. String url = "...";
3. Useragentconfig Config = new useragentconfig ();
4. Config. Host = "...";
6. Test (URL, config, null );
   

POST request

1. String url = "...";
3. Useragentconfig Config = new useragentconfig ();
4. Config. Host = "...";
5. Config. Username = "...";
6. Config. Password = "...";
8. Arraylist <basicnamevaluepair> Params = new arraylist <basicnamevaluepair> ();
9. Params. Add (New basicnamevaluepair ("...","..."));
10. ...
12. Test (URL, config, Params );