How to make single checked of checkbox in a Dialog Android?

I have two checkbox in a Dialog. I want to set single check for these checkboxes. It means if I checked the checkbox 1, the checkbox 2 will be unchecked. Similar when I check the checkbox 2. The check_value variable is set true if the checkbox 1 is checked and false when the checkbox 2 is check.

This is my code but it cannot achieve as my expected

@Override
public Dialog onCreateDialog(final Bundle savedInstanceState) {
    final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    final View dialogView = LayoutInflater.from(getActivity()).inflate(R.layout.fragment_dialogView, null);
    boolean check_value=false;

    checkbox1 = (CheckBox) dialogView.findViewById(R.id.checkbox1);
    checkbox1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            checkbox2.setChecked(false);
            checkbox1.setChecked(true);
            check_value=true;
        }
    });
    checkbox2 = (CheckBox) dialogView.findViewById(R.id.checkbox2);
    checkbox2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            checkbox2.setChecked(true);
            checkbox1.setChecked(false);
            check_value=false;
        }
    });
}

This is my xml file. The checkbox1 is true as default

<LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_below="@+id/list"
        android:layout_centerInParent="true">
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/checkbox1"
        android:checked="true"
        android:layout_marginLeft="2dp"/>

    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/checkbox2"
        android:checked="false"
        android:layout_marginLeft="2dp" />
</LinearLayout>