linphone-android/app/src/main/res/layout/chat_conversation_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:bind="http://schemas.android.com/tools">

    <data>
        <import type="android.view.View" />
        <variable
            name="backClickListener"
            type="View.OnClickListener" />
        <variable
            name="goToInfoClickListener"
            type="View.OnClickListener" />
        <variable
            name="showMenuClickListener"
            type="View.OnClickListener" />
        <variable
            name="openFilePickerClickListener"
            type="View.OnClickListener" />
        <variable
            name="openCameraClickListener"
            type="View.OnClickListener" />
        <variable
            name="scrollToBottomClickListener"
            type="View.OnClickListener" />
        <variable
            name="endToEndEncryptedEventClickListener"
            type="View.OnClickListener" />
        <variable
            name="warningConversationDisabledClickListener"
            type="View.OnClickListener" />
        <variable
            name="viewModel"
            type="org.linphone.ui.main.chat.viewmodel.ConversationViewModel" />
        <variable
            name="sendMessageViewModel"
            type="org.linphone.ui.main.chat.viewmodel.SendMessageInConversationViewModel" />
    </data>

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="?attr/color_main2_000">

            <androidx.constraintlayout.widget.Group
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:constraint_referenced_ids="avatar, title, show_menu"
                android:visibility="@{viewModel.searchBarVisible ? View.GONE : View.VISIBLE}" />

            <androidx.constraintlayout.widget.Group
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:constraint_referenced_ids="cancel_search, search, clear_field"
                android:visibility="@{viewModel.searchBarVisible ? View.VISIBLE : View.GONE, default=gone}" />

            <androidx.constraintlayout.widget.Barrier
                android:id="@+id/top_bar_barrier"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:barrierDirection="bottom"
                app:constraint_referenced_ids="title, search" />

            <ImageView
                android:id="@+id/back"
                android:layout_width="wrap_content"
                android:layout_height="@dimen/top_bar_height"
                android:padding="15dp"
                android:adjustViewBounds="true"
                android:onClick="@{backClickListener}"
                android:visibility="@{viewModel.isInCallConversation || viewModel.showBackButton &amp;&amp; !viewModel.searchBarVisible ? View.VISIBLE : View.GONE}"
                android:src="@drawable/caret_left"
                android:contentDescription="@string/content_description_go_back_icon"
                app:tint="?attr/color_main1_500"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"/>

            <include
                android:id="@+id/avatar"
                android:onClick="@{goToInfoClickListener}"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="5dp"
                android:layout_marginBottom="5dp"
                android:layout_marginStart="5dp"
                layout="@layout/contact_avatar"
                bind:model="@{viewModel.avatarModel}"
                app:layout_constraintStart_toEndOf="@id/back"
                app:layout_constraintTop_toTopOf="parent" />

            <androidx.appcompat.widget.AppCompatTextView
                style="@style/default_text_style"
                android:id="@+id/title"
                android:onClick="@{goToInfoClickListener}"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="10dp"
                android:layout_marginEnd="5dp"
                android:maxLines="1"
                android:ellipsize="end"
                android:text="@{viewModel.isGroup ? viewModel.subject : viewModel.avatarModel.name, default=`John Doe`}"
                android:textSize="16sp"
                android:textColor="?attr/color_main2_600"
                android:gravity="center_vertical"
                app:layout_constraintEnd_toStartOf="@id/start_call"
                app:layout_constraintStart_toEndOf="@id/avatar"
                app:layout_constraintTop_toTopOf="@id/avatar"
                app:layout_constraintBottom_toTopOf="@id/subtitle_barrier"/>

            <androidx.constraintlayout.widget.Barrier
                android:id="@+id/subtitle_barrier"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:barrierDirection="top"
                app:constraint_referenced_ids="muted, ephemeral_enabled" />

            <ImageView
                android:id="@+id/muted"
                android:layout_width="@dimen/small_icon_size"
                android:layout_height="@dimen/small_icon_size"
                android:layout_marginEnd="5dp"
                android:src="@drawable/bell_simple_slash"
                android:visibility="@{viewModel.isMuted ? View.VISIBLE : View.GONE, default=gone}"
                app:layout_constraintStart_toStartOf="@id/title"
                app:layout_constraintEnd_toStartOf="@id/ephemeral_enabled"
                app:layout_constraintTop_toBottomOf="@id/title"
                app:layout_constraintBottom_toBottomOf="@id/avatar"
                app:tint="@color/orange_main_400"/>

            <ImageView
                android:id="@+id/ephemeral_enabled"
                android:layout_width="@dimen/small_icon_size"
                android:layout_height="@dimen/small_icon_size"
                android:layout_marginEnd="5dp"
                android:src="@drawable/clock_countdown"
                android:visibility="@{viewModel.ephemeralLifetime > 0L ? View.VISIBLE : View.GONE, default=gone}"
                app:layout_constraintStart_toEndOf="@id/muted"
                app:layout_constraintTop_toBottomOf="@id/title"
                app:layout_constraintBottom_toBottomOf="@id/avatar"
                app:tint="@color/orange_main_400"/>

            <ImageView
                android:id="@+id/show_menu"
                android:onClick="@{showMenuClickListener}"
                android:layout_width="wrap_content"
                android:layout_height="@dimen/top_bar_height"
                android:padding="15dp"
                android:adjustViewBounds="true"
                android:src="@drawable/dots_three_vertical"
                android:visibility="@{viewModel.isInCallConversation ? View.GONE : View.VISIBLE}"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:tint="?attr/color_main2_500"/>

            <ImageView
                android:id="@+id/start_call"
                android:onClick="@{() -> viewModel.startCall()}"
                android:layout_width="wrap_content"
                android:layout_height="@dimen/top_bar_height"
                android:padding="15dp"
                android:src="@drawable/phone"
                android:visibility="@{viewModel.isInCallConversation || viewModel.isReadOnly || viewModel.searchBarVisible ? View.GONE : View.VISIBLE}"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintEnd_toStartOf="@id/show_menu"
                app:tint="?attr/color_main2_500" />

            <ImageView
                android:id="@+id/cancel_search"
                android:onClick="@{() -> viewModel.closeSearchBar()}"
                android:layout_width="wrap_content"
                android:layout_height="0dp"
                android:padding="15dp"
                android:src="@drawable/caret_left"
                app:layout_constraintBottom_toBottomOf="@id/search"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="@id/search"
                app:tint="?attr/color_main2_500" />

            <com.google.android.material.textfield.TextInputLayout
                style="?attr/textInputFilledStyle"
                android:id="@+id/search"
                android:layout_width="0dp"
                android:layout_height="@dimen/top_bar_height"
                android:gravity="center_vertical"
                android:textColorHint="?attr/color_main2_400"
                app:hintEnabled="false"
                app:hintAnimationEnabled="false"
                app:hintTextColor="?attr/color_main2_400"
                app:boxStrokeWidth="0dp"
                app:boxStrokeWidthFocused="0dp"
                app:layout_constraintEnd_toStartOf="@id/clear_field"
                app:layout_constraintStart_toEndOf="@id/cancel_search"
                app:layout_constraintTop_toTopOf="parent">

                <com.google.android.material.textfield.TextInputEditText
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:textCursorDrawable="@null"
                    android:textSize="16sp"
                    android:inputType="text"
                    android:paddingVertical="1dp"
                    android:text="@={viewModel.searchFilter}"
                    android:background="@android:color/transparent" />

            </com.google.android.material.textfield.TextInputLayout>

            <ImageView
                android:id="@+id/clear_field"
                android:onClick="@{() -> viewModel.clearFilter()}"
                android:enabled="@{viewModel.searchFilter.length() > 0}"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="6dp"
                android:layout_marginEnd="9dp"
                android:src="@drawable/x"
                app:layout_constraintBottom_toBottomOf="@id/search"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toTopOf="@id/search"
                app:tint="?attr/color_main2_500" />

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/events_list"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginTop="55dp"
                android:paddingBottom="5dp"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintBottom_toTopOf="@id/composing"/>

            <include
                android:id="@+id/secured_event"
                android:onClick="@{endToEndEncryptedEventClickListener}"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:visibility="@{viewModel.isEmpty &amp;&amp; viewModel.isEndToEndEncrypted ? View.VISIBLE : View.GONE}"
                layout="@layout/chat_conversation_secured_first_event"
                app:layout_constraintTop_toTopOf="@id/events_list"
                app:layout_constraintStart_toStartOf="@id/events_list"
                app:layout_constraintEnd_toEndOf="@id/events_list" />

            <androidx.appcompat.widget.AppCompatTextView
                style="@style/default_text_style_800"
                android:id="@+id/no_result"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/conversation_filter_no_matching_result"
                android:textColor="?attr/color_main2_600"
                android:textSize="16sp"
                android:visibility="@{viewModel.noMatchingResultForFilter ? View.VISIBLE : View.GONE}"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/search"
                app:layout_constraintBottom_toTopOf="@id/send_area"
                app:layout_constraintEnd_toEndOf="parent"/>

            <androidx.appcompat.widget.AppCompatTextView
                style="@style/default_text_style_300"
                android:id="@+id/composing"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginStart="10dp"
                android:paddingBottom="5dp"
                android:background="?attr/color_main2_000"
                android:text="@{viewModel.composingLabel, default=`John Doe is composing...`}"
                android:textSize="12sp"
                android:textColor="?attr/color_main2_400"
                android:visibility="@{viewModel.composingLabel.length() == 0 ? View.GONE : View.VISIBLE}"
                app:layout_constraintBottom_toTopOf="@id/warning_disabled_not_secured"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent" />

            <include
                style="@style/default_text_style"
                android:id="@+id/warning_disabled_not_secured"
                android:onClick="@{warningConversationDisabledClickListener}"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                layout="@layout/chat_conversation_send_area_disabled_unsecured_warning"
                android:visibility="@{viewModel.isDisabledBecauseNotSecured ? View.VISIBLE : View.GONE, default=gone}"
                app:layout_constraintBottom_toTopOf="@id/send_area"/>

            <include
                android:id="@+id/send_area"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:visibility="@{viewModel.isReadOnly || viewModel.isDisabledBecauseNotSecured ? View.GONE : View.VISIBLE}"
                layout="@layout/chat_conversation_send_area"
                app:layout_constraintBottom_toBottomOf="parent"
                bind:openFilePickerClickListener="@{openFilePickerClickListener}"
                bind:openCameraClickListener="@{openCameraClickListener}"
                bind:viewModel="@{sendMessageViewModel}"/>

            <com.google.android.material.floatingactionbutton.FloatingActionButton
                android:id="@+id/scroll_to_bottom"
                android:onClick="@{scrollToBottomClickListener}"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="end|bottom"
                android:layout_margin="16dp"
                android:src="@drawable/caret_double_down"
                android:visibility="@{viewModel.isUserScrollingUp ? View.VISIBLE : View.GONE}"
                app:tint="?attr/color_on_main"
                app:backgroundTint="?attr/color_main1_500"
                app:shapeAppearanceOverlay="@style/rounded"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintBottom_toTopOf="@id/send_area" />

            <androidx.appcompat.widget.AppCompatTextView
                style="@style/default_text_style"
                android:id="@+id/unread_messages"
                android:layout_width="24dp"
                android:layout_height="24dp"
                android:layout_marginTop="-13dp"
                android:layout_marginStart="-11dp"
                android:gravity="center"
                android:background="@drawable/shape_red_round"
                android:text="@{String.valueOf(viewModel.unreadMessagesCount), default=`1`}"
                android:textColor="?attr/color_on_main"
                android:textSize="13sp"
                android:visibility="@{viewModel.isUserScrollingUp &amp;&amp; viewModel.unreadMessagesCount > 0 ? View.VISIBLE : View.GONE}"
                app:layout_constraintTop_toTopOf="@id/scroll_to_bottom"
                app:layout_constraintStart_toEndOf="@id/scroll_to_bottom"/>

        </androidx.constraintlayout.widget.ConstraintLayout>

        <include
            android:id="@+id/message_bottom_sheet"
            layout="@layout/chat_message_bottom_sheet" />

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

</layout>