save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FILENAME = filename.getText().toString();
                COMMENTS = comments.getText().toString();
                try {
                    FileOutputStream f = openFileOutput(FILENAME,
                            Context.MODE_PRIVATE);
                    f.write(COMMENTS.getBytes());
                    f.close();
                    Toast.makeText(getBaseContext(),
                            "Saved",
                            Toast.LENGTH_SHORT).show();
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

            }

        });