PixelDroid-App-Android/app/src/main/res/layout/activity_post_creation.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="match_parent">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/upload_error"
        android:visibility="gone"
        android:layout_width="match_parent"
        android:elevation="2dp"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.mikepenz.iconics.view.IconicsTextView
            android:id="@+id/upload_error_text_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#90000000"
            android:text="@string/media_upload_failed"
            android:textColor="@color/colorPrimaryError"
            android:textSize="20sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/retry_upload_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:text="@string/retry"
            app:layout_constraintEnd_toEndOf="@id/upload_error_text_view"
            app:layout_constraintStart_toStartOf="@id/upload_error_text_view"
            app:layout_constraintTop_toBottomOf="@id/upload_error_text_view" />


    </androidx.constraintlayout.widget.ConstraintLayout>


    <com.mikepenz.iconics.view.IconicsTextView
        android:id="@+id/upload_completed_textview"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:text="@string/media_upload_completed"
        android:textColor="@android:color/holo_green_light"
        android:textSize="16sp"
        android:visibility="invisible"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/image_grid"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:padding="16dp"
        app:layout_constraintBottom_toTopOf="@id/postTextInputLayout"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/upload_completed_textview" />

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/buttonConstraints"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@id/postTextInputLayout">

        <Button
            android:id="@+id/post_creation_send_button"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:backgroundTint="@color/colorButtonBg"
            android:enabled="false"
            android:visibility="gone"
            android:text="@string/post"
            android:textColor="@color/colorButtonText"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <ProgressBar
            android:id="@+id/posting_progress_bar"
            style="?android:attr/progressBarStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent"/>
    </androidx.constraintlayout.widget.ConstraintLayout>

    <ProgressBar
        android:id="@+id/uploadProgressBar"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toTopOf="@id/postTextInputLayout"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/postTextInputLayout"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:hint="@string/description"
        app:counterEnabled="true"
        android:paddingStart="15dp"
        android:paddingEnd="15dp"
        android:textColorHint="@color/colorPrimaryTab"
        app:errorEnabled="true"
        app:errorTextColor="@color/colorPrimaryError"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/buttonConstraints"
        app:layout_constraintStart_toStartOf="parent">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/new_post_description_input_field"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:ems="10"
            android:inputType="textMultiLine"
            android:textColor="@color/colorPrimary" />

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

</androidx.constraintlayout.widget.ConstraintLayout>