How to save (switch) button state in android?

Question

I am using SWITCH (like android toggle button ) instead of normal buttons in my andorid app. The code works fine while enabling and disabling switches. But i want to store t

Answer 1

          SharedPreferences pref = getSharedPreferences("save",MODE_PRIVATE);
                    unit.setChecked(pref.getBoolean("first", false));

                            if(isChecked) {
                 SharedPreferences.Editor editor = getSharedPreferences("save"MODE_PRIVATE).edit();
                                    editor.putBoolean("first", true);
                                    editor.apply();
                                    unit.setChecked(true);}

else
{
    SharedPreferences.Editor editor = getSharedPreferences("save",MODE_PRIVATE).edit();
                                editor.putBoolean("first",false);
                                editor.apply();
                                kilometer.setText("Km/h");
                                unit.setChecked(false);`enter code here`
}