由网友(時間沖淡了初衷留下了苦衷)分享简介：这是我的code。我得到HTTP 400错误，有人可以帮我吗？HttpClient的HttpClient的;HttpPost httpPost;HTT presponse响应;HttpContext的localContext;FileEntity TMP = NULL;字符串RET = NULL;HttpCl...

这是我的code。

我得到HTTP 400错误，有人可以帮我吗？

  HttpClient的HttpClient的;
HttpPost httpPost;
HTT presponse响应;
HttpContext的localContext;
FileEntity TMP = NULL;
字符串RET = NULL;

HttpClient的=新DefaultHttpClient（）;
httpClient.getParams（）的setParameter（ClientPNames.COOKIE_POLICY，CookiePolicy.RFC_2109）。

httpPost =新HttpPost（URL）;
TMP =新FileEntity（数据，UTF-8）;

httpPost.setEntity（TMP）;
httpPost.setHeader（内容类型，多部分/表单数据）;
httpPost.setHeader（access_token，facebook.getAccessToken（））;
httpPost.setHeader（源，data.getAbsolutePath（））;
httpPost.setHeader（信息，标题的照片）;

localContext =新BasicHttpContext（）;
响应= httpClient.execute（httpPost，localContext）;
 

bobince，由于这是我的新的ID，我会尽量把OAuth的，以我的连接头。

这是我的老code，我会尽快更新它。

 私人无效uploadPicture（）抛出ParseException的，IOException异常{
    HttpClient的HttpClient的=新DefaultHttpClient（）;
    httpclient.getParams（）.setParameter（CoreProtocolPNames.PROTOCOL_VERSION，HttpVersion.HTTP_1_1）;

    HttpPost httppost =新HttpPost（https://graph.facebook.com/me/photos）;
    档案文件=新的文件（sdpicturePath）;

    // DEBUG
    Log.d（TSET，FILE ::+ file.exists（））; // IT IS NOT NULL
    Log.d（TEST，AT+ fbAccessToken）; //我得到了一些访问令牌

    MultipartEntity mpEntity =新MultipartEntity（）;
    ContentBody cbFile =新FileBody（文件，图像/ PNG）;
    ContentBody cbMessage =新StringBody（TEST TSET）;
    ContentBody cbAccessToken =新StringBody（fbAccessToken）;

    mpEntity.addPart（access_token，cbAccessToken）;
    mpEntity.addPart（源，cbFile）;
    mpEntity.addPart（信息，cbMessage）;

    httppost.setEntity（mpEntity）;

    // DEBUG
    的System.out.println（执行请求+ httppost.getRequestLine（））;
    HTT presponse响应= httpclient.execute（httppost）;
    HttpEntity resEntity = response.getEntity（）;

    // DEBUG
    的System.out.println（response.getStatusLine（））;
    如果（resEntity！= NULL）{
      的System.out.println（EntityUtils.toString（resEntity））;
    如果} //结束

    如果（resEntity！= NULL）{
      resEntity.consumeContent（）;
    如果} //结束

    httpclient.getConnectionManager（）.shutdown（）;
uploadPicture的} //结束（）
 

解决方案

setEntity 设置整个请求体的来源，所以这只会工作，如果数据文件是一个已经连接codeD 的multipart / form-data的块。

要创建的multipart / form-data的克斯codeD的形式提交用作POST请求的身体，你需要一个MIME多恩codeR，一般 org.apache.http.entity.mime.MultipartEntity 。不幸的是，这是不是由Android的捆绑，所以如果你想要你就必须在一个新的 HttpClient的来自Apache拉。

请参阅this问题例如：code和这个线程的背景。

This is my code.

I got Http 400 error, can someone help me?

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, thanks this is my new id, I will try put OAuth to my connection header.

And this is my old code, I will update it soon.

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( )

解决方案

setEntity sets the source of the whole request body, so this would only work if the data file was an already-encoded multipart/form-data block.

To create a multipart/form-data-encoded form submission for use as a POST request body, you'll need a MIME multipart encoder, typically org.apache.http.entity.mime.MultipartEntity. Unfortunately, this is not bundled by Android so if you want it you'll have to pull in a newer HttpClient from Apache.

See this question for example code and this thread for background.