ArrayList sorting Android -

private list<string> mitem = null; private list<string> mpath = null; string dirpath = environment.getexternalstoragedirectory().getpath();  private void getdir() {     mitem = new arraylist<string>();     mpath = new arraylist<string>();     file f = new file(dirpath);     file[] files = f.listfiles();     (int = 0; < files.length; i++) {         file file = files[i];         if (!file.ishidden() && file.canread()) {             mpath.add(file.getpath());             if (file.isdirectory()) {                 // folder names                 mitem.add(file.getname() + "/");             } else {                 // file name                 mitem.add(file.getname());              }         }     }     filelist = new filemanageradapter(this, mitem, mpath);     listview.setadapter(filelist);     listview.setonitemclicklistener(onitemclick); } 

here im adding list of files , folders on path arraylist, how sort folders first , files @ last. kind of sorting technique should use in order achieve this. in advance.

update: customadapter

public class filemanageradapter extends arrayadapter<string> {     private list<string> mitem;     private context mcontext;      public filemanageradapter(context context, list<string> item,             list<string> path) {         super(context, r.layout.fileadapter_list, item);         this.mcontext = context;         this.mitem = item;     }      @override     public view getview(final int position, view convertview, viewgroup parent) {         if (convertview == null) {             layoutinflater minflater = (layoutinflater) mcontext                     .getsystemservice(context.layout_inflater_service);             convertview = minflater.inflate(r.layout.fileadapter_list, null);         }         textview txttitle = (textview) convertview.findviewbyid(r.id.txt);         txttitle.settext(mitem.get(position));          return convertview;     } } 

i using below code sorting files in type sorted:

protected void sortbynmdes(){          fadapter = new folderadapter(getactivity(), r.layout.file_row, filelist);          fadapter.sort(new comparator<file>() {               @override                 public int compare(file lhs, file rhs) {                     // todo auto-generated method stub                     if(lhs.isdirectory() && !rhs.isdirectory()){                             return -1;                     }else if(!lhs.isdirectory() && rhs.isdirectory()){                             return 1;                     }                     return rhs.getname().tolowercase().compareto(lhs.getname().tolowercase());                 }         });          setlistadapter(fadapter);      } 

where filelist arraylist of files.