//...ignoring other code.../

/*Call this method whenever you want to show the file chooser*/

/**
     * Tweak method from website*/
    private void processFile(){
        FileChooser fileChooser = new FileChooser(MainActivity.this);

        fileChooser.setFileListener(new FileChooser.FileSelectedListener() {
            @Override
            public void fileSelected(final File file) {
                // ....do something with the file
                String filename = file.getAbsolutePath();
                Log.i("File Name", filename);
                // then actually do something in another module

            }
        });
// Set up and filter my extension I am looking for
        //fileChooser.setExtension("pdf");
        fileChooser.showDialog();
    }

/*According to documentation from Roger Keays*/
/*new FileChooser(activity).setFileListener(new FileSelectedListener() {
    @Override public void fileSelected(final File file) {
        // do something with the file
    }).showDialog();*/