How to zip the files include sub folders in android -

i want zip more 1 directory. mean have 1 inner directory , 1 parent directory. want zip parent directory.

i using following codes:

my file path :

/data/data/com/app/1430159400000/32640/images/capture_image_20150427_115541.png" /data/data/com/app/1430159400000/32640/images/capture_image_20150427_115542.png" /data/data/com/app/1430159400000/32640/images/childimages/capture_image_20150427_115543.png" /data/data/com/app/1430159400000/32640/images/childimages/capture_image_20150427_115544.png" /data/data/com/app/1430159400000/32640/images/capture_image_20150427_115545.png" /data/data/com/app/1430159400000/32640/images/capture_image_20150427_115546.png" 

to files directory:-

public void getlistfilesforcreatingzip(file parentdir) {         string[] filespath = null;         file[] files = parentdir.listfiles();         filespath = new string[(int) parentdir.length()];         int index = 0;         int index1=0;         (file file : files) {             if (file.isdirectory()) {                 if(file.getname().equals("childimages"))                 {                     file[] files1 = file.listfiles();                     for(file ss:files1)                     {                         filespath[index]=ss.getpath();                         index++;                     }                 }             } else {                 filespath[index] = file.getpath();             }             index++;         }         zip(filespath, "pathname";     } 

to zip files:-

public void zip(string[] _files, string zipfilename) {         try {             bufferedinputstream origin = null;             /*file root = application.getinstance().getdir("bol", context.mode_private);             file customdir = new file(root + file.separator + file.separator + preferencemanagerforbol.getinstance().getbolselecteddate() + file.separator + preferencemanagerforbol.getinstance().getbolordernumber());             if (customdir.exists() == false) {                 customdir.mkdirs();             }  */                file file = new file(boldetailshandler.getinstance().createbasepath(),  zipfilename + ".zip");             fileoutputstream dest = new fileoutputstream(file);             zipoutputstream out = new zipoutputstream(new bufferedoutputstream(                     dest));             byte data[] = new byte[buffer];              (int = 0; < _files.length; i++) {                 if(!_files[i].contains(".zip"))                 {                 logger.v("compress", "adding: " + _files[i]);                 fileinputstream fi = new fileinputstream(_files[i]);                 origin = new bufferedinputstream(fi, buffer);                  zipentry entry = new zipentry(_files[i].substring(_files[i].lastindexof("/") + 1));                 out.putnextentry(entry);                 int count;                  while ((count = origin.read(data, 0, buffer)) != -1) {                     out.write(data, 0, count);                 }                 origin.close();                 }             }              out.close();         } catch (exception e) {             e.printstacktrace();         }     } 

when use following codes facing null pointer exception in zip() method. when zip() method try read child path , again try read parent path showing null pointer exception.

please let me idea solve this.

index++;. have 2 of them. place second 1 first 1 directly after filespath[index] = file.getpath();.

but string array filespath = new string[(int) parentdir.length()]; not have right size in way. there no room files of sub directory.

you better use <string> arraylist can add as want without having know @ forehand how there be.