How Android traverses all files in a particular directory _android

The first case for everyone to share Android traverse a specific directory of all files, including subdirectories, and delete the most recently created.

 Private Boolean Deletelastfromfloder (String path) {Boolean success = false;
      try {arraylist<file> images = new arraylist<file> ();
      GetFiles (images, path);
      File latestsavedimage = images.get (0); if (latestsavedimage.exists ()) {for (int i = 1; i < images.size (); i++) {File nextfile = Images.get
          (i);
          if (nextfile.lastmodified () > Latestsavedimage.lastmodified ()) {latestsavedimage = Nextfile;
        } log.e ("Brady", "images =" + Latestsavedimage.getabsolutepath ());
      Success = Latestsavedimage.delete ();
    } catch (Exception e) {e.printstacktrace ();
  return success; private void GetFiles (arraylist<file> filelist, String path) {file[] allfiles = new File (path). Listfiles ()
    ;
      for (int i = 0; i < allfiles.length i++) {File file = Allfiles[i];
      if (File.isfile ()) {filelist.add (file); else if (!fiLe.getabsolutepath (). Contains (". Thumnail")) {GetFiles (filelist, File.getabsolutepath ());
 }
    }
  }

The second case describes the folder traversal Android code for your reference, as follows

Package com.once;
Import Java.io.File;
Import java.util.ArrayList;
Import java.util.LinkedList; /** * Folder Traversal * @author Once * * */public class Dirtraversal {//no recursion public static Linkedlist<file&gt ;
    Listlinkedfiles (String strpath) {linkedlist<file> list = new linkedlist<file> ();
    File dir = new file (strpath);
    File File = Dir.listfiles ();
      for (int i = 0; i < file.length i++) {if (File.isdirectory ()) list.add (file);
    Else System.out.println (File.getabsolutepath ());
    } File tmp;
      while (!list.isempty ()) {tmp = (File) list.removefirst ();
        if (Tmp.isdirectory ()) {file = Tmp.listfiles ();
        if (file = = null) continue;
          for (int i = 0; i < file.length i++) {if (File.isdirectory ()) list.add (file);
        Else System.out.println (File.getabsolutepath ()); } else {System.out.println (tmp.getabsolutEpath ());
  } return list; //recursion public static arraylist<file> listfiles (String strpath) {return refreshfilelist (strpath
  ); public static arraylist<file> refreshfilelist (String strpath) {arraylist<file> filelist = new Array
    List<file> ();
    File dir = new file (strpath);
 
    File files = dir.listfiles ();
    if (files = null) return null; for (int i = 0; i < files.length i++) {if (Files.isdirectory ()) {refreshfilelist (Files.getabsolutepath
      ());
      else {if (Files.getname (). toLowerCase (). EndsWith ("Zip")) filelist.add (files);
  } return filelist;
 }
}

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