----formshow

  newpath := '/storage/sdcard0/DCIM/100ANDRO/GRJKDAGLGXYSF';
  if not TDirectory.Exists (newpath) then begin
      TDirectory.CreateDirectory (newpath); //Create a folder
    end;
  newpath := newpath + '/';

----存入本机

var

  filename:string;
   newfile:Tfilestream;

begin

   filename := 'update_sf_' + formatdatetime('yyyy-MM-dd',now) + gxyglkId;
   newfile := TFile.Create (newpath + filename);
   newfile.Free;
   clientdatasetlocal.SaveToFile(newpath + filename,dfXML);

end;

---创建文件

var
  newpath:string;
  newfile:Tfilestream;
begin
  newpath := '/storage/sdcard0/DCIM/100ANDRO/GRJKDAGLF';
  if TFile.Exists (newpath + '/update.xml') then begin
      ShowMessage ('File exists');
    end
    else begin
      newfile := TFile.Create (newpath + '/update.xml'); //Create a file (stream)
      newfile.Free; //Clear Stream
    //  SpeedButton5Click (Self); //Close the window
    //  TotalWork (path, True); //Update the list
    end;

---创建文件路径

var
  newpath:string;
begin
  newpath := '/storage/sdcard0/DCIM/100ANDRO/GRJKDAGLF';
  showmessage(newpath);
  if TDirectory.Exists (newpath) then begin
      ShowMessage ('Folder Exists!');
    end
    else begin
      TDirectory.CreateDirectory (newpath); //Create a folder
      ShowMessage ('Folder created!');
     // SpeedButton5Click (Self); //Close the window
     // TotalWork (path, True); //Update the list
    end;

本文转自鹅倌51CTO博客，原文链接：http://blog.51cto.com/kaixinbuliao/1535172 ，如需转载请自行联系原作者