Mercury-IM/app/src/main/res/layout/view_chat_field.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:background="@null">

    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:cardUseCompatPadding="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        card_view:cardCornerRadius="28dp"
        card_view:cardElevation="6dp"
        card_view:layout_constraintStart_toStartOf="parent">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:minHeight="56dp">

            <androidx.appcompat.widget.AppCompatImageButton
                android:id="@+id/btn_media"
                android:layout_width="56dp"
                android:layout_height="56dp"
                android:background="@null"
                android:tint="?attr/colorAccent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintBottom_toBottomOf="parent"
                app:srcCompat="@drawable/ic_add_white_24dp" />

            <EditText
                android:id="@+id/text_body"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginBottom="8dp"
                android:inputType="textMultiLine|textAutoCorrect"
                android:maxLines="6"
                card_view:layout_constraintBottom_toBottomOf="parent"
                card_view:layout_constraintEnd_toStartOf="@+id/btn_send"
                card_view:layout_constraintStart_toEndOf="@+id/btn_media"
                card_view:layout_constraintTop_toTopOf="parent"
                tools:text="Open Protocols!" />

            <androidx.appcompat.widget.AppCompatImageButton
                android:id="@+id/btn_send"
                android:layout_width="56dp"
                android:layout_height="56dp"
                android:background="@null"
                android:tint="?attr/colorAccent"
                app:layout_constraintEnd_toEndOf="parent"
                app:srcCompat="@drawable/ic_send_black_24dp"
                app:layout_constraintBottom_toBottomOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

    </androidx.cardview.widget.CardView>

</androidx.constraintlayout.widget.ConstraintLayout>