app/src/syncbase2/res/layout/sharing.xml

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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="8dp"
        app:layoutManager="LinearLayoutManager"/>

    <android.support.design.widget.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingEnd="20dp"
        android:paddingStart="20dp"
        android:paddingTop="8dp">

        <EditText
            android:id="@+id/custom_email"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:hint="@string/sharing_custom_hint"
            android:imeOptions="actionSend"
            android:inputType="textEmailAddress"
            android:textColor="#000000"
            android:textSize="22sp"
            android:textStyle="bold"/>
    </android.support.design.widget.TextInputLayout>

</LinearLayout>