http://sunil-android.blogspot.tw/2013/09/file-upload-on-php-server-in-android.html http://www.webtech.tw/info.php?tid=24 For this using multipart boundary. So here question is arises what is multipart boundary and why use it? The Content-Type field for multipart entities requires one parameter, "boundary", which is used to specify the encapsulation boundary. The encapsulation boundary is defined as a line consisting entirely of two hyphen characters ("-", decimal code 45) followed by the boundary parameter value from the Content-Type header field. Thus, a typical multipart Content-Type header field might look like this: Content-Type: multipart/mixed; boundary=gc0p4Jq0M2Yt08jU534c0p This indicates that the entity consists of several parts, each itself with a structure that is syntactically identical to an RFC 822 message, except that the header area might be completely empty, and that the parts are each preceded by the line --gc0p4Jq0M2Yt08jU534c0p. Things to Note...
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