Mercury-IM/app/src/main/res/layout/view_compose.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"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="horizontal"
    tools:showIn="@layout/activity_chat">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/constraintLayout"
        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:background="@drawable/rectangle"
        android:elevation="15dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/btn_send"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <ImageButton
            android:id="@+id/btn_emoji"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentStart="true"
            android:layout_marginStart="8dp"
            android:layout_marginBottom="8dp"
            android:background="@null"
            android:tint="@color/tint_compose"
            android:contentDescription="@string/description_add_emoji"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:srcCompat="@drawable/ic_insert_emoticon_white_24dp" />

        <EditText
            android:id="@+id/text_body"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:background="@null"
            android:hint="@string/hint_type_your_message"
            android:inputType="textMultiLine|textAutoCorrect|textCapSentences"
            android:textColor="@android:color/primary_text_light"
            android:textColorHint="@android:color/secondary_text_light"
            android:maxLines="6"
            android:padding="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="@+id/btn_media"
            app:layout_constraintStart_toEndOf="@id/btn_emoji"
            app:layout_constraintTop_toTopOf="parent" />

        <ImageButton
            android:id="@+id/btn_media"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="8dp"
            android:background="@null"
            android:tint="@color/tint_compose"
            android:contentDescription="@string/description_add_attachment"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:srcCompat="@drawable/ic_attach_file_white_24dp" />

    </androidx.constraintlayout.widget.ConstraintLayout>


    <ImageButton
        android:id="@+id/btn_send"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:background="@drawable/circle"
        android:elevation="15dp"
        android:tint="@color/tint_compose"
        android:contentDescription="@string/description_send_message"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:srcCompat="@drawable/ic_send_black_24dp" />

</androidx.constraintlayout.widget.ConstraintLayout>