In the emulator, everything works as it should, but on real devices a bunch of long-created files appear. Do not tell me why this is happening?

private void fill(File f) { File[]dirs = f.listFiles(); this.setTitle("Current Dir: "+f.getName()); List<Item>dir = new ArrayList<Item>(); List<Item>fls = new ArrayList<Item>(); try{ for(File ff: dirs) { Date lastModDate = new Date(ff.lastModified()); final Calendar c = Calendar.getInstance(); int time = Integer.parseInt(Time1); c.add(Calendar.MINUTE, - time); SimpleDateFormat dfDate = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss"); String currentDate = dfDate.format(c.getTime()); String Date = dfDate.format(lastModDate); if(ff.isDirectory()){ File[] fbuf = ff.listFiles(); int buf = 0; if(fbuf != null){ buf = fbuf.length; } else buf = 0; String num_item = String.valueOf(buf); if(buf == 0) num_item = num_item + " item"; else num_item = num_item + " items"; if (CheckDates(Date, currentDate)) { dir.add(new Item(ff.getName(), num_item, Date, ff.getAbsolutePath(), "directory_icon", Uri.fromFile(ff))); } } else { if (CheckDates(Date, currentDate)) { String name = ff.getName(); String image; String extension = ff.getAbsolutePath().substring(ff.getAbsolutePath().lastIndexOf(".")); if (extension.equals(".jpg") || extension.equals(".png") || extension.equals(".jpeg")) image = "file_image"; else if (extension.equals(".pdf")) image = "file_pdf"; else if (extension.equals(".pptx")) image = "file_powerpoint"; else image = "file"; fls.add(new Item(name , getSize(ff), Date, ff.getAbsolutePath(), image, Uri.fromFile(ff))); } } } }catch(Exception e) { } Collections.sort(dir); Collections.sort(fls); dir.addAll(fls); if(!f.getName().equalsIgnoreCase("sdcard")) dir.add(0,new Item("...","Parent Directory","",f.getParent(),"arrow", Uri.fromFile(f))); adapter = new FileArrayAdapter(FileChooser.this,R.layout.file_view,dir); this.setListAdapter(adapter); } private static boolean CheckDates(String startDate, String endDate) { if (startDate.compareTo(endDate)>0) {return true;} else {return false;} }

    1 answer 1

    Comparing dates via compareTo their strings is incorrect. Use Date.compareTo / Date.after / Date.before , for example:

     private static boolean checkDates(Date date1, Date date2) { return date1.after(date2); }
    • Thank you very much, but why did the date comparison I used work in the emulator? - Alex Khamitov
    • @AlexKhamitov, well, in some particular cases, the comparison of dates through the lines may work), but on the whole this is wrong - EgorD