Android:SNS客户端开发八:发送带图片的微博(二)(发送多媒体的post方法)
????? 好了,之前我们已经获取到了需要发送的图片存在于手机中的路径,也就是上一篇文章中的picPath,那么我们今天通过这个路径将图片发出去。
???? 先看新浪微博对发送图片的说明:http://open.weibo.com/wiki/Statuses/upload。在注意事项中新浪写到:上传图片需要采用multipart/form-data方式提交pic参数,并且放在POST请求的body里。另外,只有以oauth_开头的参数才需要参加OAuth的签名。
????? 我们可以采取两种方法来实现这样的一个post方法,1、通过HttpURLConnectiion自己构造一个http请求的全部内容2、同样是通过HttpClient开源项目,但是我们需要添加一个额外的包,包名为:httpmine-4.X,大家可以自行下载。
????? 首先给出第一种方法,此处参考http://www.itivy.com/android/archive/2011/7/6/android-weibo-oauth-send-text-and-image.html给出的方法实现,特别感谢。
/* * 新浪微博发送图片post方法,自己构造相应的请求内容 */public String uploadStatus(File aFile, String status, String urlPath)throws OAuthMessageSignerException,OAuthExpectationFailedException, OAuthCommunicationException,IOException {OAuthConsumer httpOAuthConsumer = new DefaultOAuthConsumer(consumer.getConsumerKey(), consumer.getConsumerSecret());httpOAuthConsumer.setTokenWithSecret(consumer.getToken(),consumer.getTokenSecret());String result = null;URL url = new URL(urlPath);HttpURLConnection request = (HttpURLConnection) url.openConnection();request.setDoOutput(true);request.setDoInput(true);request.setRequestMethod("POST");HttpParameters para = new HttpParameters();para.put("status",URLEncoder.encode(status, "utf-8").replaceAll("\\+", "%20"));// para.put("source",URLEncoder.encode(status,// "utf-8").replaceAll("\\+", "%20"));String boundary = "---------------------------37531613912423";String content = "--" + boundary+ "\r\nContent-Disposition: form-data; name=\"status\"\r\n\r\n";String pic = "\r\n--"+ boundary+ "\r\nContent-Disposition: form-data; name=\"pic\"; filename=\"image.jpg\"\r\nContent-Type: image/jpeg\r\n\r\n";byte[] end_data = ("\r\n--" + boundary + "--\r\n").getBytes();FileInputStream stream = new FileInputStream(aFile);byte[] file = new byte[(int) aFile.length()];stream.read(file);request.setRequestProperty("Content-Type","multipart/form-data; boundary=" + boundary); // 设置表单类型和分隔符request.setRequestProperty("Content-Length",String.valueOf(content.getBytes().length+ status.getBytes().length + pic.getBytes().length+ aFile.length() + end_data.length)); // 设置内容长度// // 下面的步骤是对请求进行签名。httpOAuthConsumer.setAdditionalParameters(para);httpOAuthConsumer.sign(request);//讲相应的请求参数写入到entity中OutputStream ot = request.getOutputStream();ot.write(content.getBytes());ot.write(status.getBytes());ot.write(pic.getBytes());ot.write(file);ot.write(end_data);ot.flush();ot.close();request.connect();InputStream is = request.getInputStream();BufferedReader reader = new BufferedReader(new InputStreamReader(is));String line = null;StringBuffer sb = new StringBuffer();while ((line = reader.readLine()) != null) {sb.append(line);}result = sb.toString();System.out.println("reuslt---->" + result);System.out.println(request.getResponseMessage());/* * if (200 == request.getResponseCode()) { result = "SUCCESS"; } */return result;}
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构造原理,在新浪微博注意事项中已经写的十分清楚,此处就不再做过多的解释。这里尤其值得注意的是:写入的占位符\r\n等均不可缺少,不然无法构造正确的请求内容。
第二种方法:
/* * 新浪微博发送图片post方法 */public String doPostWithMultipart(String url,List<NameValuePair> pairs,String pic) throws IllegalCharsetNameException, UnsupportedCharsetException, ClientProtocolException, IOException, OAuthMessageSignerException, OAuthExpectationFailedException, OAuthCommunicationException{HttpPost postRequest = new HttpPost(url);MultipartEntity reqEntity = new MultipartEntity();for(NameValuePair p:pairs){reqEntity.addPart(p.getName(),new StringBody(p.getValue(),Charset.forName("UTF-8")));}FileBody filebody = new FileBody(new File(pic),"image/jpeg");reqEntity.addPart("pic",filebody);postRequest.setEntity(reqEntity);consumer.sign(postRequest);HttpClient httpclient = new DefaultHttpClient();HttpResponse response = null;response = httpclient.execute(postRequest);String result = ApacheUtils.getResponseText(response);return result;}
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两种方法均可使用
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1 楼 codeMoe 2012-03-22 请问这个方法在我选择图片后返回本界面时使用可以吗 2 楼 adapt_x 2012-05-08 httpmine-4.X楼主,请问这个jar包在哪里下载啊??可以发给我吗?
或者你可以发的全部代码给我吗??