如何在Android上使用multipart / form-data上传图片/图片

这是我的代码。

我得到了Http 400错误,有人能帮帮我吗?

HttpClient httpClient; HttpPost httpPost; HttpResponse response; HttpContext localContext; FileEntity tmp = null; String ret = null; httpClient = new DefaultHttpClient( ); httpClient.getParams().setParameter( ClientPNames.COOKIE_POLICY, CookiePolicy.RFC_2109) ; httpPost = new HttpPost(url); tmp = new FileEntity( data,"UTF-8" ); httpPost.setEntity( tmp ); httpPost.setHeader( "Content-Type", "multipart/form-data" ); httpPost.setHeader( "access_token", facebook.getAccessToken( ) ); httpPost.setHeader( "source", data.getAbsolutePath( ) ); httpPost.setHeader( "message", "Caption for the photo" ); localContext = new BasicHttpContext( ); response = httpClient.execute( httpPost,localContext ); 

bobince,谢谢这是我的新ID,我会尝试将OAuth放到我的连接头。

这是我的旧代码,我会尽快更新。

 private void uploadPicture( ) throws ParseException, IOException { HttpClient httpclient = new DefaultHttpClient(); httpclient.getParams( ).setParameter( CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1 ); HttpPost httppost = new HttpPost( "https://graph.facebook.com/me/photos" ); File file = new File( sdpicturePath ); // DEBUG Log.d( "TSET", "FILE::" + file.exists( ) ); // IT IS NOT NULL Log.d( "TEST", "AT:" + fbAccessToken ); // I GOT SOME ACCESS TOKEN MultipartEntity mpEntity = new MultipartEntity( ); ContentBody cbFile = new FileBody( file, "image/png" ); ContentBody cbMessage = new StringBody( "TEST TSET" ); ContentBody cbAccessToken = new StringBody( fbAccessToken ); mpEntity.addPart( "access_token", cbAccessToken ); mpEntity.addPart( "source", cbFile ); mpEntity.addPart( "message", cbMessage ); httppost.setEntity( mpEntity ); // DEBUG System.out.println( "executing request " + httppost.getRequestLine( ) ); HttpResponse response = httpclient.execute( httppost ); HttpEntity resEntity = response.getEntity( ); // DEBUG System.out.println( response.getStatusLine( ) ); if (resEntity != null) { System.out.println( EntityUtils.toString( resEntity ) ); } // end if if (resEntity != null) { resEntity.consumeContent( ); } // end if httpclient.getConnectionManager( ).shutdown( ); } // end of uploadPicture( ) 

setEntity设置整个请求主体的源,因此只有在data文件是已编码的multipart/form-data块时才会有效。

要创建用作POST请求主体的multipart/form-data -encoded表单提交,您需要一个MIME多部分编码器,通常是org.apache.http.entity.mime.MultipartEntity 。 不幸的是,这不是由Android捆绑的,所以如果你想要它,你将不得不从Apache引入更新的HttpClient 。

请参阅此问题以获取示例代码和此主题的背景信息。

有我的工作解决方案使用apache http库发送带有post的图像:

  ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); byte[] imageBytes = baos.toByteArray(); HttpClient httpclient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(StaticData.AMBAJE_SERVER_URL + StaticData.AMBAJE_ADD_AMBAJ_TO_GROUP); String boundary = "-------------" + System.currentTimeMillis(); httpPost.setHeader("Content-type", "multipart/form-data; boundary="+boundary); ByteArrayBody bab = new ByteArrayBody(imageBytes, "pic.png"); StringBody sbOwner = new StringBody(StaticData.loggedUserId, ContentType.TEXT_PLAIN); StringBody sbGroup = new StringBody("group", ContentType.TEXT_PLAIN); HttpEntity entity = MultipartEntityBuilder.create() .setMode(HttpMultipartMode.BROWSER_COMPATIBLE) .setBoundary(boundary) .addPart("group", sbGroup) .addPart("owner", sbOwner) .addPart("image", bab) .build(); httpPost.setEntity(entity); try { HttpResponse response = httpclient.execute(httpPost); ...then reading response 

至于facebook graph api,这段代码非常完美。 但是,有时候,你需要使用name而不是filename ,graph api似乎与rfc文件冲突。

 final String BOUNDERY = "3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f"; final String CRLF = "\r\n"; StringBuilder sbBody_1 = new StringBuilder(); sbBody_1.append("--" + BOUNDERY + CRLF); sbBody_1.append("Content-Disposition: form-data; filename=\"source\"" + CRLF); sbBody_1.append(CRLF); StringBuilder sbBody_2 = new StringBuilder(); sbBody_2.append(CRLF + "--" + BOUNDERY + "--"); URL url = new URL("https://graph.facebook.com/me/photos?access_token=" + accessToken); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setDoOutput(true); connection.setRequestMethod("POST"); connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDERY); connection.setChunkedStreamingMode(0); OutputStream out = new BufferedOutputStream(connection.getOutputStream()); out.write(sbBody_1.toString().getBytes()); out.write(bFile);// bFile is byte array of the bitmap out.write(sbBody_2.toString().getBytes()); out.close(); BufferedReader bips = new BufferedReader(new InputStreamReader(connection.getInputStream())); String temp = null; while ((temp = bips.readLine()) != null) { Log.d("fbnb", temp); } bips.close(); connection.disconnect();