Android RadioButton，定制按钮样式

1.定义选中和非选中的样式选择器；res/drawable/custom_radio_button.xml

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

2.在布局文件中设置background,取消原生的button

<RadioButton
        android:id="@+id/home_rb"
        android:layout_width="@dimen/dp_20"
        android:layout_height="@dimen/dp_20"
        app:layout_constraintStart_toEndOf="@+id/home_listView_tv"
        android:button="@null"//重要
        android:background="@drawable/custom_radio_button"//重要
        android:layout_marginEnd="@dimen/dp_10"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>