PickerUtils/picker/src/main/res/layout/item_picker_title.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/item_picker_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxLines="1"
        android:padding="@dimen/picker_dp_10"
        android:textColor="@color/picker_color_black4"
        android:textSize="@dimen/picker_sp_14" />

    <View
        android:id="@+id/picker_title_view"
        android:layout_width="match_parent"
        android:layout_height="@dimen/picker_dp_2"
        android:background="@color/colorAccent" />
</LinearLayout>