Get values from multiple RadioGroups

Question

I am creating an activity which contains 7 RadioGroups each with 5 RadioButtons. My problem is that I am getting selected index of only one RadioGroup (lvl_mon) and the other 6 are returning -1 however they are selected. My code is :

lvl_mon = (RadioGroup)findViewById(R.id.lvl_monday);
lvl_tue = (RadioGroup)findViewById(R.id.lvl_tuesday);
lvl_wed = (RadioGroup)findViewById(R.id.lvl_wednesday);
lvl_thu = (RadioGroup)findViewById(R.id.lvl_thursday);
lvl_fri = (RadioGroup)findViewById(R.id.lvl_friday);
lvl_sat = (RadioGroup)findViewById(R.id.lvl_saturday);
lvl_sun = (RadioGroup)findViewById(R.id.lvl_sunday);

int index_mon = lvl_mon.indexOfChild(findViewById(lvl_mon.getCheckedRadioButtonId()));
int index_tue = lvl_tue.indexOfChild(findViewById(lvl_tue.getCheckedRadioButtonId()));
int index_wed = lvl_wed.indexOfChild(findViewById(lvl_wed.getCheckedRadioButtonId()));
int index_thu = lvl_thu.indexOfChild(findViewById(lvl_thu.getCheckedRadioButtonId()));
int index_fri = lvl_fri.indexOfChild(findViewById(lvl_fri.getCheckedRadioButtonId()));
int index_sat = lvl_sat.indexOfChild(findViewById(lvl_sat.getCheckedRadioButtonId()));
int index_sun = lvl_sun.indexOfChild(findViewById(lvl_sun.getCheckedRadioButtonId()));

Answer 1

I figured out the problem , I had same ids of RadioButtons in each RadioGroup so I changed the ids plus cleaned the project. This fixed the issue