2022年android网络连接 .pdf

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1、android 网络连接总结文章分类 :移动开发一： HttpURLConnection Java 代码URL sourceUrl; String fileName =; try sourceUrl = new URL( 网址 ); fileName = sourceUrl.getFile(); fileName = fileName.substring(fileName.lastIndexOf(/) + 1); fileName = /sdcard/+(new Date().getTime()+fileName; /*创建临时文件File myTempFile = File.createTe

2、mpFile(temfile, .+mp3);/ 文件扩展名记录临时文件名currentTempFilePath = myTempFile.getAbsolutePath(); */ FileOutputStream fos = new FileOutputStream(fileName); int read = 0; byte buffer = new byte512; HttpURLConnection conn = (HttpURLConnection) sourceUrl.openConnection(); conn.setDoInput(true); conn.connect();

3、int length = conn.getContentLength(); InputStream is = conn.getInputStream(); do read = is.read(buffer); if(read 0) fos.write(buffer, 0, read); while(read != -1); catch (MalformedURLException e) / TODO Auto-generated catch block e.printStackTrace(); return; catch (IOException e) / TODO Auto-generate

4、d catch block e.printStackTrace(); 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 1 页，共 11 页 - - - - - - - - - return; if(fileName !=) File file = new File(fileName); if (file.exists() /根据 filename，操作这个文件 URL sourceUrl; String fileName =; try sourceUrl = new URL( 网址

5、); fileName = sourceUrl.getFile(); fileName = fileName.substring(fileName.lastIndexOf(/) + 1); fileName = /sdcard/+(new Date().getTime()+fileName; /*创建临时文件File myTempFile = File.createTempFile(temfile, .+mp3);/ 文件扩展名记录临时文件名currentTempFilePath = myTempFile.getAbsolutePath(); */ FileOutputStream fos =

6、 new FileOutputStream(fileName); int read = 0; byte buffer = new byte512; HttpURLConnection conn = (HttpURLConnection) sourceUrl.openConnection(); conn.setDoInput(true); conn.connect(); int length = conn.getContentLength(); InputStream is = conn.getInputStream(); do read = is.read(buffer); if(read 0

7、) fos.write(buffer, 0, read); while(read != -1); catch (MalformedURLException e) / TODO Auto-generated catch block 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 2 页，共 11 页 - - - - - - - - - e.printStackTrace(); return; catch (IOException e) / TODO Auto-generated cat

8、ch block e.printStackTrace(); return; if(fileName !=) File file = new File(fileName); if (file.exists() /根据 filename，操作这个文件 Java 代码URL imageUrl = null; Bitmap bitmap = null; try /* new URL对象将网址传入*/ imageUrl = new URL(uriPic); catch (MalformedURLException e) e.printStackTrace(); try /* 取得连接*/ HttpURL

9、Connection conn = (HttpURLConnection) imageUrl .openConnection(); conn.connect(); /* 取得返回的InputStream */ InputStream is = conn.getInputStream(); mTextView1.setText(conn.getResponseCode()+=+conn.getResponseMessage(); /* 将 InputStream 变成 Bitmap */ bitmap = BitmapFactory.decodeStream(is); /* 关闭 InputSt

10、ream */ is.close(); catch (IOException e) 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 3 页，共 11 页 - - - - - - - - - e.printStackTrace(); URL imageUrl = null; Bitmap bitmap = null; try /* new URL对象将网址传入*/ imageUrl = new URL(uriPic); catch (MalformedURLException e) e

11、.printStackTrace(); try /* 取得连接*/ HttpURLConnection conn = (HttpURLConnection) imageUrl .openConnection(); conn.connect(); /* 取得返回的InputStream */ InputStream is = conn.getInputStream(); mTextView1.setText(conn.getResponseCode()+=+conn.getResponseMessage(); /* 将 InputStream 变成 Bitmap */ bitmap = Bitm

12、apFactory.decodeStream(is); /* 关闭 InputStream */ is.close(); catch (IOException e) e.printStackTrace(); 处理文字数据Java 代码/* 将 InputStream 转成 Reader */ BufferedReader in = new BufferedReader(new InputStreamReader( conn.getInputStream(); String inputLine; /* 图文件路径*/ String uriPic = ; /* 一行一行读取*/ while (in

13、putLine = in.readLine() != null) 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 4 页，共 11 页 - - - - - - - - - uriPic += inputLine; /* 将 InputStream 转成 Reader */ BufferedReader in = new BufferedReader(new InputStreamReader( conn.getInputStream(); String inputLine; /* 图

14、文件路径*/ String uriPic = ; /* 一行一行读取*/ while (inputLine = in.readLine() != null) uriPic += inputLine; URLConnection 获取图片Java 代码URL aryURI = new URL(myImageURLposition); URLConnection conn = aryURI.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); Bitmap bm = BitmapFactory.decod

15、eStream(is); is.close(); imageView.setImageBitmap(bm); URL aryURI = new URL(myImageURLposition); URLConnection conn = aryURI.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); Bitmap bm = BitmapFactory.decodeStream(is); is.close(); 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - -

16、- - - - - - 名师精心整理 - - - - - - - 第 5 页，共 11 页 - - - - - - - - - imageView.setImageBitmap(bm); 注:URL 可以直接InputStream is = URL.openStream(); XML 的应用Java 代码URL url = new URL(ConstData.queryString+cityParamString); SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp = spf.newSAXParser();

17、 XMLReader xr = sp.getXMLReader(); myHandler gwh = new myHandler(); xr.setContentHandler(gwh); InputStreamReader isr =new InputStreamReader(url.openStream(),GBK); InputSource is=new InputSource(isr); xr.parse(is); URL url = new URL(ConstData.queryString+cityParamString); SAXParserFactory spf = SAXPa

18、rserFactory.newInstance(); SAXParser sp = spf.newSAXParser(); XMLReader xr = sp.getXMLReader(); myHandler gwh = new myHandler(); xr.setContentHandler(gwh); InputStreamReader isr =new InputStreamReader(url.openStream(),GBK); InputSource is=new InputSource(isr); xr.parse(is); 名师资料总结 - - -精品资料欢迎下载 - -

19、- - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 6 页，共 11 页 - - - - - - - - - 向服务器上传文件Java 代码private void uploadFile() String end = rn; String twoHyphens = -; String boundary = *; try URL url =new URL(actionUrl); HttpURLConnection con=(HttpURLConnection)url.openConnection(); /* 允许 Input、Output

20、，不使用 Cache */ con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); /* 设置传送的method=POST */ con.setRequestMethod(POST); /* setRequestProperty */ con.setRequestProperty(Connection, Keep-Alive); con.setRequestProperty(Charset, UTF-8); con.setRequestProperty(Content-Type, multipart/form-

21、data;boundary=+boundary); /* 设置 DataOutputStream */ DataOutputStream ds = new DataOutputStream(con.getOutputStream(); ds.writeBytes(twoHyphens + boundary + end); ds.writeBytes(Content-Disposition: form-data; + name=file1;filename= + newName + + end); ds.writeBytes(end); /* 取得文件的FileInputStream */ Fi

22、leInputStream fStream = new FileInputStream(uploadFile); /* 设置每次写入1024bytes */ int bufferSize = 1024; byte buffer = new bytebufferSize; int length = -1; /* 从文件读取数据至缓冲区*/ while(length = fStream.read(buffer) != -1) /* 将资料写入DataOutputStream 中 */ ds.write(buffer, 0, length); 名师资料总结 - - -精品资料欢迎下载 - - - -

23、 - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 7 页，共 11 页 - - - - - - - - - ds.writeBytes(end); ds.writeBytes(twoHyphens + boundary + twoHyphens + end); /* close streams */ fStream.close(); ds.flush(); /* 取得 Response内容*/ InputStream is = con.getInputStream(); int ch; StringBuffer b =new StringB

24、uffer(); while( ( ch = is.read() ) != -1 ) b.append( (char)ch ); /* 将 Response显示于 Dialog */ showDialog(b.toString().trim(); /* 关闭 DataOutputStream */ ds.close(); catch(Exception e) showDialog(+e); private void uploadFile() String end = rn; String twoHyphens = -; String boundary = *; try URL url =new

25、 URL(actionUrl); HttpURLConnection con=(HttpURLConnection)url.openConnection(); /* 允许 Input、Output，不使用 Cache */ con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); /* 设置传送的method=POST */ con.setRequestMethod(POST); /* setRequestProperty */ 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - -

26、 - - - - - - - 名师精心整理 - - - - - - - 第 8 页，共 11 页 - - - - - - - - - con.setRequestProperty(Connection, Keep-Alive); con.setRequestProperty(Charset, UTF-8); con.setRequestProperty(Content-Type, multipart/form-data;boundary=+boundary); /* 设置 DataOutputStream */ DataOutputStream ds = new DataOutputStrea

27、m(con.getOutputStream(); ds.writeBytes(twoHyphens + boundary + end); ds.writeBytes(Content-Disposition: form-data; + name=file1;filename= + newName + + end); ds.writeBytes(end); /* 取得文件的FileInputStream */ FileInputStream fStream = new FileInputStream(uploadFile); /* 设置每次写入1024bytes */ int bufferSize

28、 = 1024; byte buffer = new bytebufferSize; int length = -1; /* 从文件读取数据至缓冲区*/ while(length = fStream.read(buffer) != -1) /* 将资料写入DataOutputStream 中 */ ds.write(buffer, 0, length); ds.writeBytes(end); ds.writeBytes(twoHyphens + boundary + twoHyphens + end); /* close streams */ fStream.close(); ds.flus

29、h(); /* 取得 Response内容*/ InputStream is = con.getInputStream(); int ch; StringBuffer b =new StringBuffer(); while( ( ch = is.read() ) != -1 ) b.append( (char)ch ); /* 将 Response显示于 Dialog */ showDialog(b.toString().trim(); /* 关闭 DataOutputStream */ 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - -

30、 - - 名师精心整理 - - - - - - - 第 9 页，共 11 页 - - - - - - - - - ds.close(); catch(Exception e) showDialog(+e); DefaultHttpClient 用户登录验证Java 代码/* 账号： david */ /* 密码： 1234 */ String uriAPI = http:/www.dubblogs.cc:8751/Android/Test/API/TestLogin/index.php; String strRet = ; try DefaultHttpClient httpclient =

31、new DefaultHttpClient(); HttpResponse response; HttpPost httpost = new HttpPost(uriAPI); List nvps = new ArrayList (); nvps.add(new BasicNameValuePair(uid, strUID); nvps.add(new BasicNameValuePair(upw, strUPW); httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8); response = httpclient.execu

32、te(httpost); HttpEntity entity = response.getEntity(); /entity = response.getEntity(); Log.d(TAG, HTTP POST getStatusLine: + response.getStatusLine(); /* HTML POST response BODY */ strRet = EntityUtils.toString(entity); Log.i(TAG, strRet); strRet = strRet.trim().toLowerCase(); List cookies = httpcli

33、ent.getCookieStore().getCookies(); if (entity != null) entity.consumeContent(); 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 10 页，共 11 页 - - - - - - - - - Log.d(TAG, HTTP POST Initialize of cookies.); cookies = httpclient.getCookieStore().getCookies(); if (cookies.

34、isEmpty() Log.d(TAG , HTTP POST Cookie not found.); Log.i(TAG , entity.toString(); else for (int i = 0; i cookies.size(); i+) Log.d(TAG , HTTP POST Found Cookie: + cookies.get(i).toString(); if(strRet.equals(y) Log.i(TEST, YES); return true; else Log.i(TEST, NO); return false; catch(Exception e) e.printStackTrace(); return false; 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 11 页，共 11 页 - - - - - - - - -