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7.3.1 Android 文件上传 | 小熊教程

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本节引言

本节和下一节文件下载一样,慎入…现在实际开发涉及文件上传不会自己写上传代码,一般 会集成第三网络库来做图片上传,比如android-async-http,okhttp等,另外还有七牛也提供 了下载和上传的API,喜欢的可以去官网查看相关的API文档!本节的话有兴趣看看就好!


1.项目用到的图片上传的关键方法:

思前想后,还是决定先贴下公司项目中用到的图片上传的核心方法,这里用到一个第三方的库: android-async-http.jar,自己到github下下这个库~然后调用一下下面的方法即可,自己改下url!

上传图片的核心方法如下:

 private void sendImage(Bitmap bm) {     ByteArrayOutputStream stream = new ByteArrayOutputStream();     bm.compress(Bitmap.CompressFormat.PNG, 60, stream);     byte[] bytes = stream.toByteArray();     String img = new String(Base64.encodeToString(bytes, Base64.DEFAULT));     AsyncHttpClient client = new AsyncHttpClient();     RequestParams params = new RequestParams();     params.add("img", img);     client.post("http:xxx/postIcon", params, new AsyncHttpResponseHandler() {         @Override         public void onSuccess(int i, Header[] headers, byte[] bytes) {             Toast.makeText(MainActivity.this, "Upload Success!", Toast.LENGTH_LONG).show();          }         @Override         public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {             Toast.makeText(MainActivity.this, "Upload Fail!", Toast.LENGTH_LONG).show();         }     }); } 

2.使用HttpConnection上传文件:

简直卧槽…各种设置,各种麻烦…还是建议用1的方法吧,当然,实在太闲可以看看, 有轮子可用还是先别自己造轮子了…

 public class SocketHttpRequester    {       /**       * 发送xml数据       * @param path 请求地址       * @param xml xml数据       * @param encoding 编码       * @return       * @throws Exception       */       public static byte[] postXml(String path, String xml, String encoding) throws Exception{           byte[] data = xml.getBytes(encoding);           URL url = new URL(path);           HttpURLConnection conn = (HttpURLConnection)url.openConnection();           conn.setRequestMethod("POST");           conn.setDoOutput(true);           conn.setRequestProperty("Content-Type", "text/xml; charset="+ encoding);           conn.setRequestProperty("Content-Length", String.valueOf(data.length));           conn.setConnectTimeout(5 * 1000);           OutputStream outStream = conn.getOutputStream();           outStream.write(data);           outStream.flush();           outStream.close();           if(conn.getResponseCode()==200){               return readStream(conn.getInputStream());           }           return null;       }              /**       * 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:       *   <FORM METHOD=POST ACTION="http://192.168.0.200:8080/ssi/fileload/test.do" enctype="multipart/form-data">              <INPUT TYPE="text" NAME="name">              <INPUT TYPE="text" NAME="id">              <input type="file" name="imagefile"/>              <input type="file" name="zip"/>           </FORM>       * @param path 上传路径(注:避免使用localhost或127.0.0.1这样的路径测试,       *                  因为它会指向手机模拟器,你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)       * @param params 请求参数 key为参数名,value为参数值       * @param file 上传文件       */       public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception       {              //数据分隔线           final String BOUNDARY = "---------------------------7da2137580612";            //数据结束标志"---------------------------7da2137580612--"           final String endline = "--" + BOUNDARY + "--/r/n";                      //下面两个for循环都是为了得到数据长度参数,依据表单的类型而定           //首先得到文件类型数据的总长度(包括文件分割线)           int fileDataLength = 0;           for(FormFile uploadFile : files)           {               StringBuilder fileExplain = new StringBuilder();               fileExplain.append("--");               fileExplain.append(BOUNDARY);               fileExplain.append("/r/n");               fileExplain.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n");               fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n");               fileExplain.append("/r/n");               fileDataLength += fileExplain.length();               if(uploadFile.getInStream()!=null){                   fileDataLength += uploadFile.getFile().length();               }else{                   fileDataLength += uploadFile.getData().length;               }           }           //再构造文本类型参数的实体数据           StringBuilder textEntity = new StringBuilder();                   for (Map.Entry<String, String> entry : params.entrySet())            {                 textEntity.append("--");               textEntity.append(BOUNDARY);               textEntity.append("/r/n");               textEntity.append("Content-Disposition: form-data; name=/""+ entry.getKey() + "/"/r/n/r/n");               textEntity.append(entry.getValue());               textEntity.append("/r/n");           }                      //计算传输给服务器的实体数据总长度(文本总长度+数据总长度+分隔符)           int dataLength = textEntity.toString().getBytes().length + fileDataLength +  endline.getBytes().length;                      URL url = new URL(path);           //默认端口号其实可以不写           int port = url.getPort()==-1 ? 80 : url.getPort();           //建立一个Socket链接           Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);           //获得一个输出流(从Android流到web)           OutputStream outStream = socket.getOutputStream();           //下面完成HTTP请求头的发送           String requestmethod = "POST "+ url.getPath()+" HTTP/1.1/r/n";           outStream.write(requestmethod.getBytes());           //构建accept           String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*/r/n";           outStream.write(accept.getBytes());           //构建language           String language = "Accept-Language: zh-CN/r/n";           outStream.write(language.getBytes());           //构建contenttype           String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "/r/n";           outStream.write(contenttype.getBytes());           //构建contentlength           String contentlength = "Content-Length: "+ dataLength + "/r/n";           outStream.write(contentlength.getBytes());           //构建alive           String alive = "Connection: Keep-Alive/r/n";                   outStream.write(alive.getBytes());           //构建host           String host = "Host: "+ url.getHost() +":"+ port +"/r/n";           outStream.write(host.getBytes());           //写完HTTP请求头后根据HTTP协议再写一个回车换行           outStream.write("/r/n".getBytes());           //把所有文本类型的实体数据发送出来           outStream.write(textEntity.toString().getBytes());                               //把所有文件类型的实体数据发送出来           for(FormFile uploadFile : files)           {               StringBuilder fileEntity = new StringBuilder();               fileEntity.append("--");               fileEntity.append(BOUNDARY);               fileEntity.append("/r/n");               fileEntity.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n");               fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n");               outStream.write(fileEntity.toString().getBytes());               //边读边写               if(uploadFile.getInStream()!=null)               {                   byte[] buffer = new byte[1024];                   int len = 0;                   while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1)                   {                       outStream.write(buffer, 0, len);                   }                   uploadFile.getInStream().close();               }               else               {                   outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);               }               outStream.write("/r/n".getBytes());           }           //下面发送数据结束标志,表示数据已经结束           outStream.write(endline.getBytes());                   BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));           //读取web服务器返回的数据,判断请求码是否为200,如果不是200,代表请求失败           if(reader.readLine().indexOf("200")==-1)           {               return false;           }           outStream.flush();           outStream.close();           reader.close();           socket.close();           return true;       }              /**        * 提交数据到服务器        * @param path 上传路径(注:避免使用localhost或127.0.0.1这样的路径测试,因为它会指向手机模拟器,你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)        * @param params 请求参数 key为参数名,value为参数值        * @param file 上传文件        */       public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception       {          return post(path, params, new FormFile[]{file});       }       /**       * 提交数据到服务器       * @param path 上传路径(注:避免使用localhost或127.0.0.1这样的路径测试,因为它会指向手机模拟器,你可以使用http://www.baidu.com或http://192.168.1.10:8080这样的路径测试)       * @param params 请求参数 key为参数名,value为参数值       * @param encode 编码       */       public static byte[] postFromHttpClient(String path, Map<String, String> params, String encode) throws Exception       {           //用于存放请求参数           List<NameValuePair> formparams = new ArrayList<NameValuePair>();           for(Map.Entry<String, String> entry : params.entrySet())           {               formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));           }           UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, encode);           HttpPost httppost = new HttpPost(path);           httppost.setEntity(entity);           //看作是浏览器           HttpClient httpclient = new DefaultHttpClient();           //发送post请求             HttpResponse response = httpclient.execute(httppost);              return readStream(response.getEntity().getContent());       }       /**       * 发送请求       * @param path 请求路径       * @param params 请求参数 key为参数名称 value为参数值       * @param encode 请求参数的编码       */       public static byte[] post(String path, Map<String, String> params, String encode) throws Exception       {           //String params = "method=save&name="+ URLEncoder.encode("老毕", "UTF-8")+ "&age=28&";//需要发送的参数           StringBuilder parambuilder = new StringBuilder("");           if(params!=null && !params.isEmpty())           {               for(Map.Entry<String, String> entry : params.entrySet())               {                   parambuilder.append(entry.getKey()).append("=")                       .append(URLEncoder.encode(entry.getValue(), encode)).append("&");               }               parambuilder.deleteCharAt(parambuilder.length()-1);           }           byte[] data = parambuilder.toString().getBytes();           URL url = new URL(path);           HttpURLConnection conn = (HttpURLConnection)url.openConnection();           //设置允许对外发送请求参数           conn.setDoOutput(true);           //设置不进行缓存           conn.setUseCaches(false);           conn.setConnectTimeout(5 * 1000);           conn.setRequestMethod("POST");           //下面设置http请求头           conn.setRequestProperty("Accept", "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");           conn.setRequestProperty("Accept-Language", "zh-CN");           conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");           conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");           conn.setRequestProperty("Content-Length", String.valueOf(data.length));           conn.setRequestProperty("Connection", "Keep-Alive");                      //发送参数           DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());           outStream.write(data);//把参数发送出去           outStream.flush();           outStream.close();           if(conn.getResponseCode()==200)           {               return readStream(conn.getInputStream());           }           return null;       }              /**        * 读取流        * @param inStream        * @return 字节数组        * @throws Exception        */       public static byte[] readStream(InputStream inStream) throws Exception       {           ByteArrayOutputStream outSteam = new ByteArrayOutputStream();           byte[] buffer = new byte[1024];           int len = -1;           while( (len=inStream.read(buffer)) != -1)           {               outSteam.write(buffer, 0, len);           }           outSteam.close();           inStream.close();           return outSteam.toByteArray();       }   }   

偶然发现一篇以前转载的,可以搭配着上面的看看…:使用HttpConnection上传mp3文件


本节小结:

本节还是直接无视吧…关于文件上传等进阶部分直接教大家用第三方算了,项目中需要用到 第三方直接复制1的代码,导入个android-async-http即可!

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