Margen establecer mediante programación en RadioButton no se aplica

Question

Estoy tratando de establecer un margen de RadioButtons añadido mediante programación a un RadioGroup, pero falla .: los RadioButtons se añaden correctamente, pero tienen margen 0 ...

Cualquiera ¿poder ayudar?

diseño

<RadioGroup android:id="@+id/rg_nav" android:orientation="vertical" 
    android:layout_width="wrap_content" android:layout_height="wrap_content"> 
</RadioGroup> 

actividad

float density = getResources().getDisplayMetrics().density; 

rg_nav = (RadioGroup) findViewById(R.id.rg_nav); 

LinearLayout.LayoutParams params_rb = new LinearLayout.LayoutParams(
     (int)(8*density), 
     (int)(8*density)); 
int margin = (int)(6*density); 
params_rb.setMargins(margin, margin, margin, margin); 

for(String url : product.list_url_pic){ 

    RadioButton radio_btn = new RadioButton(ProductHome.this); 
    radio_btn.setButtonDrawable(R.drawable.rb_nav); 
    radio_btn.setId(rb_id++); 
    rg_nav.addView(radio_btn, params_rb); 
} 

Answer 1

tuviera que sustituir

LinearLayout.LayoutParams params_rb = new LinearLayout.LayoutParams(
    (int)(8*density), 
    (int)(8*density)); 

por

RadioGroup.LayoutParams params_rb = new RadioGroup.LayoutParams(
       (int)(8*density), 
       (int)(8*density)); 

Answer 2

Su código parece ser correcta. Trate de aplicar LayoutParams directamente a los botones

radio_btn.setButtonDrawable(R.drawable.rb_nav); 
radio_btn.setId(rb_id++);  
rg_nav.addView(radio_btn); 
radio_btn.setLayoutParams(params_rb); 

Answer 3

Prueba esto:

TableRow.LayoutParams rg_params = new TableRow.LayoutParams(0, LayoutParams.WRAP_CONTENT, 3f); 
RadioGroup radio_group=new RadioGroup(this); 
radio_group.setOrientation(RadioGroup.HORIZONTAL); 
radio_group.setLayoutParams(rg_params); 

RadioButton dry=new RadioButton(this); 
RadioGroup.LayoutParams params_soiled = new RadioGroup.LayoutParams(getBaseContext(), null); 
params_soiled.setMargins(10, 0, 10, 0); 
dry.setLayoutParams(button_params);