在程序中实现<form-upload>

private void uploadFile()
  {
    String end = "\r\n";
    String twoHyphens = "--";
    String boundary = "*****";
    try
    {
      URL url =new URL(actionUrl);
      HttpURLConnection con=(HttpURLConnection)url.openConnection();
      /* 允许Input、Output，不使用Cache */
      con.setDoInput(true);
      con.setDoOutput(true);
      con.setUseCaches(false);
      /* 设定传送的method=POST */
      con.setRequestMethod("POST");
      /* setRequestProperty */
      con.setRequestProperty("Connection", "Keep-Alive");
      con.setRequestProperty("Charset", "UTF-8");
      con.setRequestProperty("Content-Type",
                         "multipart/form-data;boundary="+boundary);
      /* 设定DataOutputStream */
      DataOutputStream ds =
        new DataOutputStream(con.getOutputStream());
      ds.writeBytes(twoHyphens + boundary + end);
      ds.writeBytes("Content-Disposition: form-data; " +
                    "name=\"file1\";filename=\"" +
                    newName +"\"" + end);
      ds.writeBytes(end);  

      /* 取得文件的FileInputStream */
      FileInputStream fStream = new FileInputStream(uploadFile);
      /* 设定每次写入1024bytes */
      int bufferSize = 1024;
      byte[] buffer = new byte[bufferSize];

      int length = -1;
      /* 从文件读取数据到缓冲区 */
      while((length = fStream.read(buffer)) != -1)
      {
        /* 将数据写入DataOutputStream中 */
        ds.write(buffer, 0, length);
      }
      ds.writeBytes(end);
      ds.writeBytes(twoHyphens + boundary + twoHyphens + end);

      /* close streams */
      fStream.close();
      ds.flush();
     
      /* 取得Response内容 */
      InputStream is = con.getInputStream();
      int ch;
      StringBuffer b =new StringBuffer();
      while( ( ch = is.read() ) != -1 )
      {
        b.append( (char)ch );
      }
      /* 将Response显示于Dialog */
      showDialog(b.toString().trim());
      /* 关闭DataOutputStream */
      ds.close();
    }
    catch(Exception e)
    {
      showDialog(""+e);
    }
  }

评论

1 楼 白云天 2012-10-09  

用手机中缺省的程序打开文件的代码：

/* 在手机上打开文件的method */
  private void openFile(File f)
  {
    Intent intent = new Intent();
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.setAction(android.content.Intent.ACTION_VIEW);
   
    /* 调用getMIMEType()来取得MimeType */
    String type = getMIMEType(f);
    /* 设定intent的file与MimeType */
    intent.setDataAndType(Uri.fromFile(f),type);
    startActivity(intent);
  }

  /* 判断文件MimeType的method */
  private String getMIMEType(File f)
  {
    String type="";
    String fName=f.getName();
    /* 取得扩展名 */
    String end=fName.substring(fName.lastIndexOf(".")+1,fName.length()).toLowerCase();
   
    /* 按扩展名的类型决定MimeType */
    if(end.equals("m4a")||end.equals("mp3")||end.equals("mid")||end.equals("xmf")||end.equals("ogg")||end.equals("wav"))
    {
      type = "audio";
    }
    else if(end.equals("3gp")||end.equals("mp4"))
    {
      type = "video";
    }
    else if(end.equals("jpg")||end.equals("gif")||end.equals("png")||end.equals("jpeg")||end.equals("bmp"))
    {
      type = "image";
    }
    else if(end.equals("apk"))
    {
      /* android.permission.INSTALL_PACKAGES */
      type = "application/vnd.android.package-archive";
    }
    else
    {
      type="*";
    }
    /*如果无法直接打开，就跳出软件清单给使用者选择 */
    if(end.equals("apk"))
    {
    }
    else
    {
      type += "/*"; 
    }
    return type; 
  }