RadioButton with a behavior of a ToggleButton or TabButton

bg_radio_toggle_left.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true">
        <shape android:shape="rectangle">
            <solid android:color="#3B5A9A" />
            <corners android:bottomLeftRadius="4dp"
                android:topLeftRadius="4dp"/>
        </shape>
    </item>
    <item>
        <shape android:shape="rectangle">
            <solid android:color="#00000000" />
            <corners android:bottomLeftRadius="4dp"
                android:topLeftRadius="4dp"/>
        </shape>
    </item>

</selector>

bg_radio_toggle_right.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true">
        <shape android:shape="rectangle">
            <solid android:color="#3B5A9A" />

            <corners android:bottomRightRadius="4dp"
                android:topRightRadius="4dp"/>
        </shape>
    </item>
    <item>
        <shape android:shape="rectangle">
            <solid android:color="#00000000" />
            <corners android:bottomRightRadius="4dp"
                android:topRightRadius="4dp"/>
        </shape>
    </item>

</selector>

your_layout_xml.xml

<android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <RadioGroup
            android:id="@+id/rgTask"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/round_border"
            android:orientation="horizontal"
            android:weightSum="2"
            android:layout_margin="10dp"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            >

            <RadioButton
                android:id="@+id/rbBlue"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@drawable/bg_radio_toggle_left"
                android:button="@android:color/transparent"
                android:gravity="center"
                android:paddingBottom="5dp"
                android:paddingTop="5dp"
                android:singleLine="true"
                tools:text="Grêmio"
                android:checked="true"
                android:textColor="@color/white"
                />

            <View
                android:id="@+id/vSep1"
                android:layout_width="1dp"
                android:layout_height="match_parent"
                android:background="#0000FF"
                android:visibility="visible" />

            <RadioButton
                android:id="@+id/rbGreen"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@drawable/bg_radio_toggle_right"
                android:button="@android:color/transparent"
                android:gravity="center"
                android:paddingBottom="5dp"
                android:paddingTop="5dp"
                android:singleLine="true"
                tools:text="Internacional"
                android:checked="false"/>

        </RadioGroup>
    </android.support.constraint.ConstraintLayout>