Signal-Android/app/src/main/res/layout/conversation_input_panel.xml

<?xml version="1.0" encoding="utf-8"?>
<org.thoughtcrime.securesms.components.InputPanel 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:id="@+id/bottom_panel"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/signal_background_primary"
    android:clipChildren="false"
    android:clipToPadding="false"
    android:orientation="vertical">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/input_panel_sticker_suggestion"
        android:layout_width="match_parent"
        android:layout_height="90dp"
        android:background="@color/signal_background_secondary"
        android:visibility="gone" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:clipChildren="false"
        android:clipToPadding="false"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:paddingStart="14dp"
        android:paddingTop="8dp"
        android:paddingEnd="16dp"
        android:paddingBottom="8dp">

        <androidx.appcompat.widget.AppCompatImageButton
            android:id="@+id/input_panel_exit_edit_mode"
            android:layout_width="32dp"
            android:layout_height="32dp"
            android:layout_gravity="bottom"
            android:layout_marginEnd="12dp"
            android:layout_marginBottom="6dp"
            android:background="@drawable/circle_tintable"
            android:backgroundTint="@color/signal_colorOnSurfaceVariant"
            android:foreground="?attr/selectableItemBackgroundBorderless"
            android:scaleType="center"
            android:visibility="gone"
            app:srcCompat="@drawable/symbol_x_24"
            app:tint="@color/signal_colorOnPrimary" />

        <FrameLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:clipChildren="false"
            android:clipToPadding="false"
            android:paddingStart="2dp">

            <LinearLayout
                android:id="@+id/compose_bubble"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@drawable/compose_background"
                android:clipChildren="false"
                android:clipToPadding="false"
                android:orientation="vertical">

                <LinearLayout
                    android:id="@+id/edit_message_compose_header"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:gravity="center_vertical"
                    android:layout_marginStart="16dp"
                    android:layout_marginTop="12dp"
                    android:layout_marginEnd="16dp"
                    android:visibility="gone">

                    <androidx.appcompat.widget.AppCompatTextView
                        android:layout_width="0dp"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:drawablePadding="6dp"
                        android:text="@string/InputPanel_edit_message"
                        android:textAppearance="@style/Signal.Text.LabelLarge"
                        android:textColor="@color/signal_colorOnSurface"
                        app:drawableStartCompat="@drawable/symbol_edit_compact_16"
                        app:drawableTint="@color/signal_colorOnSurface" />
                    
                    <com.google.android.material.imageview.ShapeableImageView
                        android:id="@+id/edit_message_thumbnail"
                        android:layout_width="20dp"
                        android:layout_height="20dp"
                        android:layout_gravity="center"
                        android:visibility="gone"
                        app:shapeAppearanceOverlay="@style/ShapeAppearanceOverlay.Signal.EditMessageMediaThumbnail"/>

                </LinearLayout>

                <org.thoughtcrime.securesms.components.QuoteView
                    android:id="@+id/quote_view"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="6dp"
                    android:layout_marginTop="6dp"
                    android:layout_marginEnd="6dp"
                    android:visibility="gone"
                    app:message_type="preview"
                    app:quote_colorPrimary="@color/signal_text_primary"
                    app:quote_colorSecondary="@color/signal_text_primary"
                    tools:visibility="visible" />

                <org.thoughtcrime.securesms.components.LinkPreviewView
                    android:id="@+id/link_preview"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="6dp"
                    android:layout_marginTop="6dp"
                    android:layout_marginEnd="6dp"
                    android:visibility="gone"
                    app:linkpreview_type="compose" />

                <FrameLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:clipChildren="false"
                    android:clipToPadding="false">

                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:clipChildren="false"
                        android:clipToPadding="false">

                        <org.thoughtcrime.securesms.components.emoji.EmojiToggle
                            android:id="@+id/emoji_toggle"
                            android:layout_width="wrap_content"
                            android:layout_height="@dimen/conversation_compose_height"
                            android:layout_gravity="bottom"
                            android:background="?selectableItemBackgroundBorderless"
                            android:contentDescription="@string/conversation_activity__emoji_toggle_description"
                            android:paddingStart="12dp"
                            android:paddingEnd="12dp"
                            app:tint="@color/signal_colorOnSurfaceVariant" />

                        <Space
                            android:layout_width="0dp"
                            android:layout_height="@dimen/conversation_compose_height" />

                        <org.thoughtcrime.securesms.components.ComposeText
                            android:id="@+id/embedded_text_editor"
                            style="@style/ComposeEditText"
                            android:layout_width="0dp"
                            android:layout_height="wrap_content"
                            android:layout_gravity="center_vertical"
                            android:layout_weight="1"
                            android:nextFocusRight="@+id/send_button"
                            android:nextFocusForward="@+id/send_button"
                            tools:hint="Send TextSecure message"
                            tools:visibility="invisible">

                            <requestFocus />
                        </org.thoughtcrime.securesms.components.ComposeText>

                        <FrameLayout
                            android:layout_width="wrap_content"
                            android:layout_height="match_parent"
                            android:clipChildren="false"
                            android:clipToPadding="false">

                            <org.thoughtcrime.securesms.components.HidingLinearLayout
                                android:id="@+id/quick_attachment_toggle"
                                android:layout_width="wrap_content"
                                android:layout_height="match_parent"
                                android:layout_gravity="right|end"
                                android:clipChildren="false"
                                android:clipToPadding="false">

                                <ImageButton
                                    android:id="@+id/quick_camera_toggle"
                                    android:layout_width="24dp"
                                    android:layout_height="match_parent"
                                    android:layout_gravity="center_vertical"
                                    android:layout_marginEnd="16dp"
                                    android:background="?selectableItemBackgroundBorderless"
                                    android:contentDescription="@string/conversation_activity__quick_attachment_drawer_toggle_camera_description"
                                    android:scaleType="fitCenter"
                                    app:tint="@color/signal_colorOnSurfaceVariant"
                                    app:srcCompat="@drawable/ic_camera_24" />

                                <org.thoughtcrime.securesms.components.MicrophoneRecorderView
                                    android:id="@+id/recorder_view"
                                    android:layout_width="24dp"
                                    android:layout_height="match_parent"
                                    android:layout_gravity="center_vertical"
                                    android:layout_marginEnd="12dp"
                                    android:clipChildren="false"
                                    android:clipToPadding="false">

                                    <include layout="@layout/microphone_recorder_view" />

                                </org.thoughtcrime.securesms.components.MicrophoneRecorderView>

                            </org.thoughtcrime.securesms.components.HidingLinearLayout>

                            <org.thoughtcrime.securesms.components.HidingLinearLayout
                                android:id="@+id/inline_attachment_container"
                                android:layout_width="wrap_content"
                                android:layout_height="match_parent"
                                android:layout_gravity="right|end"
                                android:visibility="gone">

                                <ImageButton
                                    android:id="@+id/inline_attachment_button"
                                    android:layout_width="24dp"
                                    android:layout_height="@dimen/conversation_compose_height"
                                    android:layout_gravity="bottom"
                                    android:layout_marginEnd="12dp"
                                    android:background="?selectableItemBackgroundBorderless"
                                    android:contentDescription="@string/ConversationActivity_add_attachment"
                                    android:scaleType="fitCenter"
                                    app:tint="@color/signal_colorOnSurface"
                                    app:srcCompat="@drawable/ic_plus_24" />

                            </org.thoughtcrime.securesms.components.HidingLinearLayout>

                        </FrameLayout>

                    </LinearLayout>

                    <include layout="@layout/recording_layout" />

                    <org.thoughtcrime.securesms.conversation.VoiceNoteDraftView
                        android:id="@+id/voice_note_draft_view"
                        android:layout_width="match_parent"
                        android:layout_height="@dimen/conversation_compose_height"
                        android:visibility="gone"
                        tools:visibility="visible" />

                </FrameLayout>

            </LinearLayout>

        </FrameLayout>

        <org.thoughtcrime.securesms.components.AnimatingToggle
            android:id="@+id/button_toggle"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_gravity="bottom"
            android:layout_marginStart="12dp"
            android:layout_marginTop="2dp"
            android:layout_marginBottom="2dp"
            android:background="@drawable/circle_tintable">

            <ImageButton
                android:id="@+id/attach_button"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_gravity="center"
                android:background="@drawable/circle_touch_highlight_background"
                android:contentDescription="@string/ConversationActivity_add_attachment"
                android:nextFocusLeft="@+id/embedded_text_editor"
                android:padding="9dp"
                android:scaleType="fitCenter"
                app:tint="@color/conversation_send_button_tint"
                app:srcCompat="@drawable/symbol_plus_24" />

            <ImageButton
                android:id="@+id/send_edit_button"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_gravity="center"
                android:background="@drawable/circle_touch_highlight_background"
                android:contentDescription="@string/ConversationActivity_send_edit"
                android:nextFocusLeft="@+id/embedded_text_editor"
                android:padding="9dp"
                android:scaleType="fitCenter"
                app:tint="@color/conversation_send_button_tint"
                app:srcCompat="@drawable/symbol_check_24" />

            <org.thoughtcrime.securesms.components.SendButton
                android:id="@+id/send_button"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/circle_touch_highlight_background"
                android:contentDescription="@string/conversation_activity__send"
                android:nextFocusLeft="@+id/embedded_text_editor"
                android:padding="9dp"
                android:scaleType="fitCenter"
                app:tint="@color/conversation_send_button_tint"
                app:srcCompat="@drawable/ic_send_unlock_24" />

        </org.thoughtcrime.securesms.components.AnimatingToggle>

    </LinearLayout>
</org.thoughtcrime.securesms.components.InputPanel>