Пользовательская радиогруппа не отвечает слушателю onCheckChanged

Я создал пользовательскую трехкнопочную радиогруппу программно. Однако, когда я использую объект в своем фрагменте и устанавливаю onCheckChangedListener, он, похоже, не отвечает.

Вот код моей радиогруппы:

public class ThreeButtonRadioGroup extends RadioGroup {

    View v;
    Context mContext;
    LayoutInflater mInflater;

    int dim = ((2* DimensionsController.getInstance().getScreenWidth()) / 8)-5;


    public ThreeButtonRadioGroup(Context context) {
        super(context);
        mInflater = LayoutInflater.from(mContext);
        init();
    }

    public ThreeButtonRadioGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        init();
    }

    RoofUIRadioButton button1, button2, button3;

    public void init(){
        mInflater = LayoutInflater.from(mContext);
        v = mInflater.inflate(R.layout.roof_ui_macro_frequency, this, true);

        (button1 = (RoofUIRadioButton) v.findViewById(R.id.button1)).initLayout(dim);
        (button2 = (RoofUIRadioButton) v.findViewById(R.id.button2)).initLayout(dim);
        (button3 = (RoofUIRadioButton) v.findViewById(R.id.button3)).initLayout(dim);

    }

    public void setButtonText(String[] buttonText, int preClick) {
        button1.setText(buttonText[0]);
        button2.setText(buttonText[1]);
        button3.setText(buttonText[2]);

        switch(preClick){
            case 1:
                button1.setChecked(true);
                break;
            case 2:
                button2.setChecked(true);
                break;
            case 3:
                button3.setChecked(true);
                break;
        }
    }

    public void setButtonText(String[] buttonText) {
        button1.setText(buttonText[0]);
        button2.setText(buttonText[1]);
        button3.setText(buttonText[2]);
    }
}

Вот xml, который я раздуваю для радиогруппы:

<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingBottom="5dp"
android:dividerPadding="20dp"
android:showDividers="middle">

<RadioButton
    android:id="@+id/button1"
    android:button="@null"
    android:layout_width="45dp"
    android:layout_height="45dp"
    android:padding="15dp"
    android:textSize="30sp"
    android:layout_gravity="center_horizontal|center_vertical"
    android:gravity="center_vertical|center_horizontal"
    style="@style/circleButton_style"
    android:tag="1"
    />

<RadioButton
    android:id="@+id/button2"
    android:button="@null"
    android:layout_width="45dp"
    android:layout_height="45dp"
    android:padding="15dp"
    android:layout_marginLeft="20dp"
    android:layout_marginRight="20dp"
    android:textSize="30sp"
    android:layout_gravity="center_horizontal|center_vertical"
    android:gravity="center_vertical|center_horizontal"
    style="@style/circleButton_style"
    android:tag="2"
    />

<RadioButton
    android:id="@+id/button3"
    android:button="@null"
    android:layout_width="45dp"
    android:layout_height="45dp"
    android:padding="15dp"
    android:textSize="30sp"
    android:layout_gravity="center_horizontal|center_vertical"
    android:gravity="center_vertical|center_horizontal"
    style="@style/circleButton_style"
    android:tag="3"
    />

And here is where I am trying to apply the event listener:

        microRadioGroup = (ThreeButtonRadioGroup) view.findViewById(R.id.micro_radio_group);
    microRadioGroup.setButtonText(new String[]{"Day","Week","Month"}, 3);
    microRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
                System.out.println("CHECKED BUTTON: ");

        }
    });