java - Android file dialog woes -


alright, i'm trying make file choice dialog, , got can choose file, want when choose directory moves , lists files in new directory. right goes black screen when hit directory. how make list directory's files when hit directory? code got far:

private void loadfilelist(){           try{              dir.mkdirs();           }           catch(securityexception e){              log.e("error: ", "unable write on sd card " + e.tostring());           }           if(dir.exists()){              mfilelist = dir.list();           }           else{             mfilelist= new string[0];           }         }      protected dialog oncreatedialog(int id){           dialog dialog = null;           alertdialog.builder builder = new builder(this);            switch(id){           case dialog_load_rom:            builder.settitle("choose rom");            if(mfilelist == null){              dialog = builder.create();              return dialog;            }              builder.setitems(dir.list(), new dialoginterface.onclicklistener(){                public void onclick(dialoginterface dialog, int which){                   mchosenfile = dir.list()[which];                   rom = new file(dir, mchosenfile);                   if(rom.isdirectory()){                       log.e("log:",dir.getabsolutepath());                       dir = new file(dir, mchosenfile);                       log.e("log:",dir.getabsolutepath());                       loadfilelist();                       showdialog(dialog_load_rom);                   }                    else{                       loadfilelist();                       showdialog(dialog_load_patch);                   }                }               });           break;             case dialog_load_patch:            builder.settitle("choose patch");            if(mfilelist == null){              dialog = builder.create();              return dialog;            }              builder.setitems(dir.list(), new dialoginterface.onclicklistener(){                public void onclick(dialoginterface dialog, int which){                   mchosenfile = dir.list()[which];                   file sdcard = environment.getexternalstoragedirectory();                   patch = new file(sdcard, mchosenfile);                        alertdialog.builder alert = new alertdialog.builder(masterapp);                      alert.settitle("new rom name");                     alert.setmessage("please input name");                      // set edittext view user input                      final edittext input = new edittext(masterapp);                     alert.setview(input);                      alert.setpositivebutton("ok", new dialoginterface.onclicklistener() {                     public void onclick(dialoginterface dialog, int whichbutton) {                        string value = input.gettext().tostring();                        file sdcard = environment.getexternalstoragedirectory();                        file newrom = new file(sdcard,value);                         patchrom(rom, patch, newrom);                          alertdialog.builder alert2 = new alertdialog.builder(masterapp);                           alert2.settitle("finished");                          alert2.setmessage("rom has been patched");                            alert2.setpositivebutton("ok", new dialoginterface.onclicklistener() {                                 public void onclick(dialoginterface dialog, int whichbutton) {                                  system.exit(0);                             }                           });                          alert2.show();                       }                     });                      alert.setnegativebutton("cancel", new dialoginterface.onclicklistener() {                       public void onclick(dialoginterface dialog, int whichbutton) {                            file sdcard = environment.getexternalstoragedirectory();                            file newrom = new file(sdcard,"newrom.gb");                             patchrom(rom, patch, newrom);                             alertdialog.builder alert2 = new alertdialog.builder(masterapp);                               alert2.settitle("finished");                              alert2.setmessage("rom has been patched");                                alert2.setpositivebutton("ok", new dialoginterface.onclicklistener() {                                     public void onclick(dialoginterface dialog, int whichbutton) {                                      system.exit(0);                                 }                               });                              alert2.show();                       }                     });                      alert.show();                 }               });           break;             }           dialog = builder.show();           return dialog;          }

take @ code.google.com/p/android-file-dialog/ source code. alternatively, can use it, not writing own


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