android - getCheckedradiobutton always returns -1 -


this code

final radiogroup rg1 = (radiogroup) findviewbyid(r.id.radiogroup1); radiobutton rb1 = (radiobutton) findviewbyid(r.id.radio0); radiobutton rb2 = (radiobutton) findviewbyid(r.id.radio1);   radiobutton rb3 = (radiobutton) findviewbyid(r.id.radio2); final checkbox cb1 = (checkbox) findviewbyid(r.id.chkbox1); int id = rg1.getcheckedradiobuttonid(); system.out.println("------------------------|"+id); switch (id) {     case r.id.radio0:         cb1.setenabled(true);         break;      case r.id.radio1:         cb1.setenabled(true);         break;      case r.id.radio2:         cb1.setenabled(true);         break;      default:         cb1.setenabled(false);         break;     }

this returns -1(chkbox disabled) , cant seem make work . plus ive tried , assigned individual values through setid radiobutton , doesnt work either.

this xml 

<radiogroup     android:id="@+id/radiogroup1"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparenttop="true"     android:layout_centerhorizontal="true"     android:layout_margintop="46dp" >      <radiobutton         android:id="@+id/radio0"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="radiobutton1"          android:checkedbutton ="1"                 />      <radiobutton         android:id="@+id/radio1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="radiobutton2"         android:checkedbutton="2"                       />      <radiobutton         android:id="@+id/radio2"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="radiobutton3"          android:checkedbutton="3"                      /> </radiogroup>

of course won't work. should use listener detect radio button checked, this

rg1.setoncheckedchangelistener(new oncheckedchangelistener() {      @override     public void oncheckedchanged(radiogroup group, int checkedid) {          system.out.println("------------------------|"+checkedid);         switch (checkedid) {             ...          }     } });

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