@Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }
Set before making the fragment visible. This method will re-use the existing
arguments bundle in the fragment if it exists so extra arguments will not
be overwritten. This allows you to set any extra arguments in the fragment
constructor if you wish.
<p/>
The key/value-pairs listed below will be overwritten however.

@param startPath         path to directory the picker will show upon start
@param mode              what is allowed to be selected (dirs, files, both)
@param allowMultiple     selecting a single item or several?
@param allowDirCreate    can new directories be created?
@param allowExistingFile if selecting a "new" file, can existing files be chosen
@param singleClick       selecting an item does not require a press on OK
android/modules/module_filepicker/src/main/java/com/nononsenseapps/filepicker/AbstractFilePickerFragment.java