java.lang.StringIndexOutOfBoundsException: length=0; index=1
 at java.lang.String.substring(String.java:1897)
 at com.obsez.android.lib.filechooser.internals.ExtFileFilter.accept(ExtFileFilter.java:46)
 at java.io.File.listFiles(File.java:1219)
 at com.obsez.android.lib.filechooser.ChooserDialog.listDirs(ChooserDialog.java:160)
 at com.obsez.android.lib.filechooser.ChooserDialog.refreshDirs(ChooserDialog.java:235)
 at com.obsez.android.lib.filechooser.ChooserDialog.onItemClick(ChooserDialog.java:226)
 at android.widget.AdapterView.performItemClick(AdapterView.java:310)
 at android.widget.AbsListView.performItemClick(AbsListView.java:1156)
 at android.widget.AbsListView$PerformClick.run(AbsListView.java:3121)
 at android.widget.AbsListView$3.run(AbsListView.java:4036)
 at android.os.Handler.handleCallback(Handler.java:751)
 at android.os.Handler.dispatchMessage(Handler.java:95)
 at android.os.Looper.loop(Looper.java:154)
 at android.app.ActivityThread.main(ActivityThread.java:6119)
 at java.lang.reflect.Method.invoke(Native Method)
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)