checkbox样式无效问题

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/selc_ok_icon" android:state_selected="true" />
    <item android:drawable="@drawable/yuan_icon" android:state_selected="false" />
    <item android:drawable="@drawable/selc_ok_icon" android:state_checked="true" />
    <item android:drawable="@drawable/yuan_icon" android:state_checked="false" />
    <!--<item android:drawable="@drawable/yuan_icon" />-->
</selector>

                <CheckBox
                    android:id="@+id/pricex_step1_class_box"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_vertical"
                    android:layout_weight="1.0"
                    android:button="@drawable/comm_checkbox_bg"
                    android:checked="true"
                    android:gravity="center_vertical"
                    android:padding="@dimen/px8"
                    android:text="￥399元/半年"
                    android:textColor="@color/color_ff5300" />

mPricexStep2ClassBox = checkbox();
mPricexStep2ClassBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
          
                mPricexStep2ClassBox.setSelected(isChecked); // setSelected 和 check状态同步
            }
        });