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！