FairEmail/app/src/main/res/layout/item_message.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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:background="?attr/drawableItemBackground">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/clItem"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <View
            android:id="@+id/vwColor"
            android:layout_width="6dp"
            android:layout_height="0dp"
            android:background="@color/colorAccent"
            app:layout_constraintBottom_toTopOf="@id/vSeparator"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <ImageView
            android:id="@+id/ivExpander"
            android:layout_width="32dp"
            android:layout_height="32dp"
            android:layout_gravity="center_vertical|center_horizontal"
            android:src="@drawable/baseline_expand_less_24"
            android:visibility="visible"
            app:layout_constraintBottom_toBottomOf="@id/tvError"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toTopOf="parent" />

        <ImageView
            android:id="@+id/ivFlagged"
            android:layout_width="21dp"
            android:layout_height="21dp"
            android:layout_marginStart="6dp"
            android:src="@drawable/baseline_star_24"
            android:visibility="visible"
            app:layout_constraintBottom_toBottomOf="@id/tvFrom"
            app:layout_constraintStart_toEndOf="@id/ivExpander"
            app:layout_constraintTop_toTopOf="@+id/tvFrom" />

        <ImageView
            android:id="@+id/ivAvatar"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="6dp"
            android:src="@drawable/baseline_person_24"
            app:layout_constraintBottom_toBottomOf="@+id/tvFrom"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintStart_toEndOf="@id/ivFlagged"
            app:layout_constraintTop_toTopOf="@+id/tvFrom" />

        <TextView
            android:id="@+id/tvFrom"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:ellipsize="end"
            android:maxLines="1"
            android:text="From"
            android:textAppearance="@style/TextAppearance.AppCompat.Medium"
            app:layout_constraintEnd_toStartOf="@+id/tvSize"
            app:layout_constraintStart_toEndOf="@id/ivAvatar"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/tvSize"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="6dp"
            android:maxLines="1"
            android:text="123 KB"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintBottom_toBottomOf="@id/tvFrom"
            app:layout_constraintEnd_toStartOf="@id/tvTime"
            app:layout_constraintTop_toTopOf="@id/tvFrom" />

        <TextView
            android:id="@+id/tvTime"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="6dp"
            android:maxLines="1"
            android:text="Time"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintBottom_toBottomOf="@id/tvFrom"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@id/tvFrom" />

        <ImageView
            android:id="@+id/ivAttachments"
            android:layout_width="21dp"
            android:layout_height="21dp"
            android:layout_marginStart="6dp"
            android:src="@drawable/baseline_attachment_24"
            app:layout_constraintBottom_toBottomOf="@id/tvSubject"
            app:layout_constraintStart_toEndOf="@id/ivExpander"
            app:layout_constraintTop_toTopOf="@+id/tvSubject" />

        <TextView
            android:id="@+id/tvSubject"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:ellipsize="end"
            android:maxLines="1"
            android:text="Subject"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintEnd_toStartOf="@+id/tvFolder"
            app:layout_constraintStart_toEndOf="@id/ivAttachments"
            app:layout_constraintTop_toBottomOf="@id/tvFrom" />

        <TextView
            android:id="@+id/tvFolder"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="6dp"
            android:maxLines="1"
            android:text="folder"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintBottom_toBottomOf="@id/tvSubject"
            app:layout_constraintEnd_toStartOf="@+id/tvCount" />

        <TextView
            android:id="@+id/tvCount"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="3dp"
            android:maxLines="1"
            android:text="3"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintBottom_toBottomOf="@id/tvSubject"
            app:layout_constraintEnd_toStartOf="@+id/ivThread" />

        <ImageView
            android:id="@+id/ivThread"
            android:layout_width="15dp"
            android:layout_height="15dp"
            android:layout_marginEnd="6dp"
            android:src="@drawable/baseline_message_24"
            app:layout_constraintBottom_toBottomOf="@id/tvSubject"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@id/tvSubject" />

        <TextView
            android:id="@+id/tvError"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:text="error"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textColor="?attr/colorWarning"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/ivExpander"
            app:layout_constraintTop_toBottomOf="@id/tvSubject" />

        <ProgressBar
            android:id="@+id/pbLoading"
            style="@style/Base.Widget.AppCompat.ProgressBar"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:layout_marginStart="12dp"
            android:indeterminate="true"
            app:layout_constraintBottom_toBottomOf="@id/tvError"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <View
            android:id="@+id/vSeparatorAddress"
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:layout_marginTop="3dp"
            android:background="?attr/colorSeparator"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvError" />

        <TextView
            android:id="@+id/tvFromExTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:text="@string/title_from"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/vSeparatorAddress" />

        <TextView
            android:id="@+id/tvFromEx"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:maxHeight="60dp"
            android:scrollbars="vertical"
            android:text="From"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toStartOf="@+id/ivAddContact"
            app:layout_constraintStart_toEndOf="@id/tvFromExTitle"
            app:layout_constraintTop_toBottomOf="@id/vSeparatorAddress" />

        <ImageView
            android:id="@+id/ivAddContact"
            android:layout_width="21dp"
            android:layout_height="21dp"
            android:layout_marginEnd="6dp"
            android:src="@drawable/baseline_import_contacts_24"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@id/vSeparatorAddress" />

        <TextView
            android:id="@+id/tvToTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:text="@string/title_to"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvFromEx" />

        <TextView
            android:id="@+id/tvTo"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:maxHeight="60dp"
            android:scrollbars="vertical"
            android:text="To"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/tvToTitle"
            app:layout_constraintTop_toBottomOf="@id/tvFromEx" />

        <TextView
            android:id="@+id/tvReplyToTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:text="@string/title_reply_to"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvTo" />

        <TextView
            android:id="@+id/tvReplyTo"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:maxHeight="60dp"
            android:scrollbars="vertical"
            android:text="Reply to"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/tvReplyToTitle"
            app:layout_constraintTop_toBottomOf="@id/tvTo" />

        <TextView
            android:id="@+id/tvCcTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:text="@string/title_cc"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvReplyTo" />

        <TextView
            android:id="@+id/tvCc"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:maxHeight="60dp"
            android:scrollbars="vertical"
            android:text="Cc"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/tvCcTitle"
            app:layout_constraintTop_toBottomOf="@id/tvReplyTo" />

        <TextView
            android:id="@+id/tvBccTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:text="@string/title_bcc"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvCc" />

        <TextView
            android:id="@+id/tvBcc"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:maxHeight="60dp"
            android:scrollbars="vertical"
            android:text="Bcc"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/tvBccTitle"
            app:layout_constraintTop_toBottomOf="@id/tvCc" />

        <TextView
            android:id="@+id/tvTimeEx"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:text="12:34:56"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvBcc" />

        <TextView
            android:id="@+id/tvSubjectEx"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginEnd="6dp"
            android:maxHeight="60dp"
            android:scrollbars="vertical"
            android:text="Subject"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvTimeEx" />

        <View
            android:id="@+id/vSeparatorRawHeaders"
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:layout_marginTop="3dp"
            android:background="?attr/colorSeparator"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvSubjectEx" />

        <TextView
            android:id="@+id/tvHeaders"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginTop="3dp"
            android:layout_marginEnd="6dp"
            android:fontFamily="monospace"
            android:text="Headers"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            android:textSize="12sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/vSeparatorRawHeaders" />

        <ProgressBar
            android:id="@+id/pbHeaders"
            style="@style/Base.Widget.AppCompat.ProgressBar"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:indeterminate="true"
            app:layout_constraintBottom_toTopOf="@+id/vSeparatorBody"
            app:layout_constraintEnd_toEndOf="@id/tvHeaders"
            app:layout_constraintStart_toStartOf="@id/tvHeaders"
            app:layout_constraintTop_toBottomOf="@id/vSeparatorRawHeaders" />

        <com.google.android.material.bottomnavigation.BottomNavigationView
            android:id="@+id/bnvActions"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="3dp"
            android:background="?attr/colorSeparator"
            app:itemIconTint="@color/bottomnav_background"
            app:itemTextColor="@color/bottomnav_background"
            app:labelVisibilityMode="labeled"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvHeaders"
            app:menu="@menu/action_message" />

        <Button
            android:id="@+id/btnImages"
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="3dp"
            android:layout_marginEnd="6dp"
            android:minWidth="0dp"
            android:minHeight="0dp"
            android:text="@string/title_show_images"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@id/bnvActions" />

        <TextView
            android:id="@+id/tvBody"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginTop="3dp"
            android:layout_marginEnd="6dp"
            android:fontFamily="monospace"
            android:text="Body"
            android:textAppearance="@style/TextAppearance.AppCompat.Small"
            android:textIsSelectable="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/btnImages" />

        <ProgressBar
            android:id="@+id/pbBody"
            style="@style/Base.Widget.AppCompat.ProgressBar"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:indeterminate="true"
            app:layout_constraintBottom_toTopOf="@+id/vSeparatorAttachments"
            app:layout_constraintEnd_toEndOf="@id/tvBody"
            app:layout_constraintStart_toStartOf="@id/tvBody"
            app:layout_constraintTop_toBottomOf="@id/vSeparatorBody" />

        <View
            android:id="@+id/vSeparatorAttachments"
            android:layout_width="0dp"
            android:layout_height="1dp"
            android:layout_marginTop="3dp"
            android:background="?attr/colorSeparator"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@id/tvBody" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rvAttachment"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="6dp"
            android:layout_marginTop="3dp"
            android:layout_marginEnd="6dp"
            android:scrollbarStyle="outsideOverlay"
            android:scrollbars="vertical"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/vwColor"
            app:layout_constraintTop_toBottomOf="@+id/vSeparatorAttachments" />

        <View
            android:id="@+id/vSeparator"
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:layout_marginTop="3dp"
            android:background="?attr/colorSeparator"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/rvAttachment" />

        <androidx.constraintlayout.widget.Group
            android:id="@+id/grpHeaders"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:visibility="visible"
            app:constraint_referenced_ids="vSeparatorRawHeaders,tvHeaders" />

        <androidx.constraintlayout.widget.Group
            android:id="@+id/grpAttachments"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:visibility="visible"
            app:constraint_referenced_ids="vSeparatorAttachments,rvAttachment" />

        <androidx.constraintlayout.widget.Group
            android:id="@+id/grpExpanded"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:visibility="visible"
            app:constraint_referenced_ids="ivAddContact,vSeparatorAddress,tvFromExTitle,tvFromEx,tvToTitle,tvTo,tvReplyToTitle,tvReplyTo,tvCcTitle,tvCc,tvBccTitle,tvBcc,tvTimeEx,tvSubjectEx,bnvActions,tvBody,bottom_navigation" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</FrameLayout>