File dir = new File(getExternalFilesDir(null),"Data.txt");

                try{
                    FileOutputStream file = new FileOutputStream(dir,true);
                    file.write((wybierzGre.getSelectedItem().toString()+"\n").getBytes());
                    file.write((rokProdukcji.getSelectedItem().toString()+"\n").getBytes());
                    file.write((czas.getText().toString()+"\n").getBytes());
                    if(platna.isChecked()){
                        String check = "platna"+"\n";
                        file.write(check.getBytes());
                    }else if(darmowa.isChecked()){
                        String check2 = "darmowa"+"\n";
                        file.write(check2.getBytes());
                    }else{
                        String check3 = "Brak danych o platnosci" +"\n";
                        file.write(check3.getBytes());
                    }
                    file.close();
                    Toast.makeText(getApplicationContext(),"Zapis do pamięci zewnetrznej udany",Toast.LENGTH_SHORT).show();

                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });