public class Main3Activity extends AppCompatActivity {

    String snoring;
    String tiredness;
    String observed;
    String pressure;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
        Button btnNew = (Button) findViewById(R.id.avanti);


        btnNew.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {
                Intent intent = new Intent(Main3Activity.this, Main4Activity.class);
                intent.putExtra("snoring", snoring);
                intent.putExtra("tiredness", tiredness);
                intent.putExtra("observed", observed);
                intent.putExtra("pressure", pressure);
                startActivity(intent);
            }
        });
    }



        public void onRadioButtonClicked (View view){
            TextView testo = (TextView) findViewById(R.id.testo);
            boolean checked = ((RadioButton) view).isChecked();
            switch (view.getId()) {
                case R.id.radioButton1:
                    if (checked)
                        snoring = "si";
                    break;
                case R.id.radioButton2:
                    if (checked)
                        snoring = "no";
                    break;
                case R.id.radioButton3:
                    if (checked)
                        tiredness = "si";
                    break;
                case R.id.radioButton4:
                    if (checked)
                        tiredness = "no";
                    break;
                case R.id.radioButton5:
                    if (checked)
                        observed = "si";
                    break;
                case R.id.radioButton6:
                    if (checked)
                        observed = "no";
                    break;
                    case R.id.radioButton7:
                    if (checked)
                        pressure = "si";
                    break;
                case R.id.radioButton8:
                    if (checked)
                        pressure = "no";
                    break;
            }
        }
    }