AndroidAPS/app/src/main/res/layout/tidepool_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/tidepool_status"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="1dp"
        android:layout_marginTop="32dp"
        android:text="-"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/tidepool_login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:text="Login"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tidepool_status" />

    <Button
        android:id="@+id/tidepool_uploadnow"
        android:layout_width="113dp"
        android:layout_height="50dp"
        android:layout_marginTop="8dp"
        android:text="Upload now"
        app:layout_constraintStart_toEndOf="@+id/tidepool_login"
        app:layout_constraintTop_toBottomOf="@+id/tidepool_status" />

    <Button
        android:id="@+id/tidepool_removeall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="4dp"
        android:layout_marginTop="8dp"
        android:text="Remove all"
        app:layout_constraintStart_toEndOf="@+id/tidepool_uploadnow"
        app:layout_constraintTop_toBottomOf="@+id/tidepool_status" />

    <Button
        android:id="@+id/tidepool_resertstart"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="4dp"
        android:layout_marginTop="8dp"
        android:text="Reset start"
        app:layout_constraintStart_toEndOf="@+id/tidepool_removeall"
        app:layout_constraintTop_toBottomOf="@+id/tidepool_status" />

    <TextView
        android:id="@+id/tidepool_log"
        android:layout_width="395dp"
        android:layout_height="608dp"
        android:layout_marginTop="14dp"
        android:layout_marginBottom="603dp"
        android:text="-- logs --"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tidepool_login"
        app:layout_constraintVertical_bias="0.023" />

</android.support.constraint.ConstraintLayout>