android - Valid layout params for RadioButtons -

what layout parameter use make radiobuttonslayout_alignparentstart , below view? in android studio, doing creates error. or there attribute of sort add radiogroup?

here code:

   <radiogroup           android:layout_width="wrap_content"           android:layout_height="wrap_content">      <radiobutton         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/radio_button"         android:id="@+id/radiobutton"         android:layout_below="@+id/text7"         android:layout_alignparentstart="true"         android:textsize="12sp"         android:textcolor="#000000"         android:onclick="onradiobuttonclicked"/>     <radiobutton         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/radio_button2"         android:id="@+id/radiobutton2"         android:layout_below="@+id/radiobutton"         android:layout_alignparentstart="true"         android:textsize="12sp"         android:textcolor="#000000"         android:onclick="onradiobuttonclicked"/>     <radiobutton         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/radio_button3"         android:id="@+id/radiobutton3"         android:layout_below="@+id/radiobutton2"         android:layout_alignparentstart="true"         android:textsize="12sp"         android:textcolor="#000000"         android:onclick="onradiobuttonclicked"/> 

here's deal: radiogroup extends linearlayout, , means radiogroup wants radio buttons in line, either horizontal or vertical.

if need radio buttons in grid or other non-linear layout, can use relativelayout parent, have listen each 1 of radio buttons directly , code logic turns previous 1 off when next 1 selected.