android网络连接总结

一：HttpURLConnection

Java代码

1. URLsourceUrl;
2. StringfileName="";
4. try{
5. sourceUrl=newURL("网址");
6. fileName=sourceUrl.getFile();
7. fileName=fileName.substring(fileName.lastIndexOf('/')+1);
8. fileName="/sdcard/"+(newDate()).getTime()+fileName;
9. /*创建临时文件
10. FilemyTempFile=File.createTempFile("temfile","."+"mp3");//文件扩展名
11. 记录临时文件名
12. currentTempFilePath=myTempFile.getAbsolutePath();
13. */
14. FileOutputStreamfos=newFileOutputStream(fileName);
15. intread=0;
16. byte[]buffer=newbyte[512];
18. HttpURLConnectionconn=(HttpURLConnection)sourceUrl.openConnection();
19. conn.setDoInput(true);
20. conn.connect();
21. intlength=conn.getContentLength();
23. InputStreamis=conn.getInputStream();
25. do{
26. read=is.read(buffer);
27. if(read>0){
28. fos.write(buffer,0,read);
29. }
30. }while(read!=-1);
32. }catch(MalformedURLExceptione){
33. //TODOAuto-generatedcatchblock
34. e.printStackTrace();
35. return;
36. }catch(IOExceptione){
37. //TODOAuto-generatedcatchblock
38. e.printStackTrace();
39. return;
40. }
41. if(fileName!=""){
42. Filefile=newFile(fileName);
43. if(file.exists()){
44. //根据filename，操作这个文件
45. }
46. }

Java代码

1. URLimageUrl=null;
2. Bitmapbitmap=null;
3. try
4. {
5. /*newURL对象将网址传入*/
6. imageUrl=newURL(uriPic);
7. }
8. catch(MalformedURLExceptione)
9. {
10. e.printStackTrace();
11. }
12. try
13. {
14. /*取得连接*/
15. HttpURLConnectionconn=(HttpURLConnection)imageUrl
16. .openConnection();
17. conn.connect();
18. /*取得返回的InputStream*/
19. InputStreamis=conn.getInputStream();
20. mTextView1.setText(conn.getResponseCode()+"="+conn.getResponseMessage());
21. /*将InputStream变成Bitmap*/
22. bitmap=BitmapFactory.decodeStream(is);
23. /*关闭InputStream*/
24. is.close();
25. }
26. catch(IOExceptione)
27. {
28. e.printStackTrace();
29. }

处理文字数据

Java代码

1. /*将InputStream转成Reader*/
2. BufferedReaderin=newBufferedReader(newInputStreamReader(
3. conn.getInputStream()));
4. StringinputLine;
5. /*图文件路径*/
6. StringuriPic="";
7. /*一行一行读取*/
8. while((inputLine=in.readLine())!=null)
9. {
10. uriPic+=inputLine;
11. }

URLConnection 获取图片

Java代码

1. URLaryURI=newURL(myImageURL[position]);
3. URLConnectionconn=aryURI.openConnection();
4. conn.connect();
6. InputStreamis=conn.getInputStream();
8. Bitmapbm=BitmapFactory.decodeStream(is);
10. is.close();
12. imageView.setImageBitmap(bm);

注:URL可以直接InputStream is = URL.openStream();

XML 的应用

Java代码

1. URLurl=newURL(ConstData.queryString+cityParamString);
3. SAXParserFactoryspf=SAXParserFactory.newInstance();
4. SAXParsersp=spf.newSAXParser();
7. XMLReaderxr=sp.getXMLReader();
9. myHandlergwh=newmyHandler();
10. xr.setContentHandler(gwh);
12. InputStreamReaderisr=newInputStreamReader(url.openStream(),"GBK");
13. InputSourceis=newInputSource(isr);
15. xr.parse(is);

向服务器上传文件

Java代码

1. privatevoiduploadFile()
2. {
3. Stringend="\r\n";
4. StringtwoHyphens="--";
5. Stringboundary="*****";
6. try
7. {
8. URLurl=newURL(actionUrl);
9. HttpURLConnectioncon=(HttpURLConnection)url.openConnection();
10. /*允许Input、Output，不使用Cache*/
11. con.setDoInput(true);
12. con.setDoOutput(true);
13. con.setUseCaches(false);
14. /*设置传送的method=POST*/
15. con.setRequestMethod("POST");
16. /*setRequestProperty*/
17. con.setRequestProperty("Connection","Keep-Alive");
18. con.setRequestProperty("Charset","UTF-8");
19. con.setRequestProperty("Content-Type",
20. "multipart/form-data;boundary="+boundary);
21. /*设置DataOutputStream*/
22. DataOutputStreamds=
23. newDataOutputStream(con.getOutputStream());
24. ds.writeBytes(twoHyphens+boundary+end);
25. ds.writeBytes("Content-Disposition:form-data;"+
26. "name=\"file1\";filename=\""+
27. newName+"\""+end);
28. ds.writeBytes(end);
30. /*取得文件的FileInputStream*/
31. FileInputStreamfStream=newFileInputStream(uploadFile);
32. /*设置每次写入1024bytes*/
33. intbufferSize=1024;
34. byte[]buffer=newbyte[bufferSize];
36. intlength=-1;
37. /*从文件读取数据至缓冲区*/
38. while((length=fStream.read(buffer))!=-1)
39. {
40. /*将资料写入DataOutputStream中*/
41. ds.write(buffer,0,length);
42. }
43. ds.writeBytes(end);
44. ds.writeBytes(twoHyphens+boundary+twoHyphens+end);
46. /*closestreams*/
47. fStream.close();
48. ds.flush();
50. /*取得Response内容*/
51. InputStreamis=con.getInputStream();
52. intch;
53. StringBufferb=newStringBuffer();
54. while((ch=is.read())!=-1)
55. {
56. b.append((char)ch);
57. }
58. /*将Response显示于Dialog*/
59. showDialog(b.toString().trim());
60. /*关闭DataOutputStream*/
61. ds.close();
62. }
63. catch(Exceptione)
64. {
65. showDialog(""+e);
66. }
67. }

DefaultHttpClient
用户登录验证

Java代码

1. /*账号：david*/
2. /*密码：1234*/
3. StringuriAPI="http://www.dubblogs.cc:8751/Android/Test/API/TestLogin/index.php";
4. StringstrRet="";
6. try
7. {
8. DefaultHttpClienthttpclient=newDefaultHttpClient();
9. HttpResponseresponse;
10. HttpPosthttpost=newHttpPost(uriAPI);
11. List<NameValuePair>nvps=newArrayList<NameValuePair>();
12. nvps.add(newBasicNameValuePair("uid",strUID));
13. nvps.add(newBasicNameValuePair("upw",strUPW));
15. httpost.setEntity(newUrlEncodedFormEntity(nvps,HTTP.UTF_8));
17. response=httpclient.execute(httpost);
18. HttpEntityentity=response.getEntity();
19. //entity=response.getEntity();
21. Log.d(TAG,"HTTPPOSTgetStatusLine:"+response.getStatusLine());
23. /*HTMLPOSTresponseBODY*/
24. strRet=EntityUtils.toString(entity);
25. Log.i(TAG,strRet);
26. strRet=strRet.trim().toLowerCase();
28. List<cookie>cookies=httpclient.getCookieStore().getCookies();
29. if(entity!=null)
30. {
31. entity.consumeContent();
32. }
34. Log.d(TAG,"HTTPPOSTInitializeofcookies.");
35. cookies=httpclient.getCookieStore().getCookies();
36. if(cookies.isEmpty())
37. {
38. Log.d(TAG,"HTTPPOSTCookienotfound.");
39. Log.i(TAG,entity.toString());
40. }
41. else
42. {
43. for(inti=0;i<cookies.size();i++)
44. {
45. Log.d(TAG,"HTTPPOSTFoundCookie:"+cookies.get(i).toString());
46. }
47. }
50. if(strRet.equals("y"))
51. {
52. Log.i("TEST","YES");
53. returntrue;
54. }
55. else
56. {
57. Log.i("TEST","NO");
58. returnfalse;
59. }
60. }
61. catch(Exceptione)
62. {
63. e.printStackTrace();
64. returnfalse;
65. }