android:clipChildren属性，子布局超出父布局；

是否允许子View超出父View的范围，Boolean型true 、false ，默认true不允许；

android:clipChildren="true":如下

android:clipChildren="false":如下

android:clipChildren属性，子布局超出父布局；

代码：

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:clipChildren="false"

    android:layout_height="match_parent">

    <RelativeLayout

        android:id="@+id/rl"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:clipChildren="false"

        android:background="#ffffff">

        <RadioGroup

            android:id="@+id/rg"

            android:layout_width="match_parent"

            android:layout_height="48dp"

            android:background="#ffffff"

            android:clipChildren="false"

            android:gravity="bottom"

            android:orientation="horizontal">

            <RadioButton

                android:id="@+id/rb_home"

                style="@style/main_tab_button"

                android:drawableTop="@drawable/rgbtn_home_select"

                android:text="主页"/>

            <RadioButton

                android:id="@+id/rb_shoppingcart"

                style="@style/main_tab_button"

                android:drawableTop="@drawable/rgbtn_gouwuche_select"

                android:text="购物车"/>

            <ImageView

                android:id="@+id/iv"

                android:layout_width="0dp"

                android:layout_weight="1"

                android:src="@mipmap/ic_launcher_round"

                android:layout_height="68dp" />

            <RadioButton

                android:id="@+id/rb_orderfrom"

                style="@style/main_tab_button"

                android:drawableTop="@drawable/rgbtn_orderfrom_select"

                android:text="分类"/>

            <RadioButton

                android:id="@+id/rb_my"

                style="@style/main_tab_button"

                android:drawableTop="@drawable/rgbtn_my_select"

                android:text="个人"/>

        </RadioGroup>

        <View

            style="@style/Line_e0e0e0_Horizontal"/>

    </RelativeLayout>

    <FrameLayout

        android:id="@+id/fl"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_above="@id/rl"

        ></FrameLayout>

</RelativeLayout>