Androidはhttppostを通じてテキストファイルをサーバーにアップロードする実例コードです。

/**
*             log  
* @param urlstr    url 
* @param uploadFile log      
* /mnt/shell/emulated/0/LOG/LOG.log 
* @param newName log      LOG.log
* @return
*/
public static void httpPost(Activity activity,String urlstr,String uploadFile,String newName) {
LogUtil.info("getEhttpPostt", "urlstr="+urlstr+";uploadFile="+uploadFile+";newName="+newName,"i");
String end = "\r
";
String twoHyphens = "--";
String boundary = "*****";//     
int TIME_OUT = 10*1000; //    
HttpURLConnection con = null; 
DataOutputStream ds = null; 
InputStream is = null;
try {
URL url = new URL(urlstr);
con = (HttpURLConnection) url.openConnection();
con.setReadTimeout(TIME_OUT);
con.setConnectTimeout(TIME_OUT);
/*   Input、Output，   Cache */
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
//   http    
con.setRequestMethod("POST");//    
con.setRequestProperty("Connection", "Keep-Alive");//   TCP                    
con.setRequestProperty("Charset", "UTF-8");//    
con.setRequestProperty("Content-Type",//multipart/form-data          
"multipart/form-data;boundary=" + boundary);
ds = new DataOutputStream(con.getOutputStream());
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; "
+ "name=\"stblog\";filename=\"" + newName + "\"" + end);
ds.writeBytes(end);
//      FileInputStream
FileInputStream fStream = new FileInputStream(uploadFile);
/*       1024bytes */
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
/*             */
while ((length = fStream.read(buffer)) != -1) {
/*      DataOutputStream  */
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);//  
fStream.close();
ds.flush();
/*   Response   */
is = con.getInputStream();
int ch;
StringBuffer b = new StringBuffer();
while ((ch = is.read()) != -1) {
b.append((char) ch);
}
/*  Response   Dialog */
showDialog(activity,true,uploadFile,"    " + b.toString().trim());
} catch (Exception e) {
showDialog(activity,false,uploadFile,"    " + e);
}finally {
/*   DataOutputStream */
if(ds!=null){
try {
ds.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (con != null) {
con.disconnect();
}
}
}
/*   Dialog method */
private static void showDialog(final Activity activity,final Boolean isSuccess,final String uploadFile,final String mess) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
new AlertDialog.Builder(activity).setTitle("Message")
.setMessage(mess)
.setNegativeButton("  ", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
File file = new File(uploadFile);
if(file.exists()&&isSuccess){//             
file.delete();
Toast.makeText(activity, "log     ", Toast.LENGTH_SHORT).show();
}
}
}).show();
}
});
}