1:  <?xml version="1.0" encoding="utf-8"?>

   2:  <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

   3:      xmlns:app="http://schemas.android.com/apk/res-auto"

   4:      xmlns:tools="http://schemas.android.com/tools"

   5:      android:id="@+id/main"

   6:      android:layout_width="match_parent"

   7:      android:layout_height="match_parent"

   8:      tools:context=".activities.StartActivity">

   9:   

  10:      <ImageView

  11:          android:id="@+id/logoImageView"

  12:          android:layout_width="wrap_content"

  13:          android:layout_height="wrap_content"

  14:          android:src="@drawable/logo"

  15:          app:layout_constraintBottom_toTopOf="@+id/inputEditText"

  16:          app:layout_constraintEnd_toEndOf="parent"

  17:          app:layout_constraintStart_toStartOf="parent"

  18:          app:layout_constraintTop_toTopOf="parent"

  19:          app:layout_constraintVertical_bias="0.5" />

  20:   

  21:      <EditText

  22:          android:id="@+id/inputEditText"

  23:          android:layout_width="0dp"

  24:          android:layout_height="wrap_content"

  25:          android:layout_marginStart="16dp"

  26:          android:layout_marginTop="16dp"

  27:          android:layout_marginEnd="16dp"

  28:          android:hint="@string/input_hint"

  29:          android:inputType="text"

  30:          android:minHeight="48dp"

  31:          android:textAlignment="center"

  32:          app:layout_constraintBottom_toTopOf="@+id/goButton"

  33:          app:layout_constraintEnd_toEndOf="parent"

  34:          app:layout_constraintHorizontal_bias="0.0"

  35:          app:layout_constraintStart_toStartOf="parent"

  36:          app:layout_constraintTop_toBottomOf="@+id/logoImageView"

  37:          app:layout_constraintVertical_bias="0.5" />

  38:   

  39:      <Button

  40:          android:id="@+id/goButton"

  41:          android:layout_width="0dp"

  42:          android:layout_height="wrap_content"

  43:          android:layout_marginTop="16dp"

  44:          android:pointerIcon="hand"

  45:          android:text="Go"

  46:          style="@style/MyButtonStyle"

  47:          app:layout_constraintBottom_toTopOf="@+id/helpButton"

  48:          app:layout_constraintEnd_toEndOf="parent"

  49:          app:layout_constraintStart_toStartOf="parent"

  50:          app:layout_constraintTop_toBottomOf="@+id/inputEditText"

  51:          app:layout_constraintVertical_bias="0.5"

  52:          app:layout_constraintWidth_percent="0.8" />

  53:   

  54:   

  55:      <Button

  56:          android:id="@+id/helpButton"

  57:          android:layout_width="0dp"

  58:          android:layout_height="wrap_content"

  59:          android:layout_marginTop="10dp"

  60:          android:pointerIcon="hand"

  61:          android:text="Help"

  62:          style="@style/MyButtonStyle"

  63:          app:layout_constraintBottom_toBottomOf="parent"

  64:          app:layout_constraintEnd_toEndOf="parent"

  65:          app:layout_constraintStart_toStartOf="parent"

  66:          app:layout_constraintTop_toBottomOf="@+id/goButton"

  67:          app:layout_constraintVertical_bias="0.4"

  68:          app:layout_constraintWidth_percent="0.8" />

  69:   

  70:      <ProgressBar

  71:          android:id="@+id/progressBar"

  72:          android:layout_width="wrap_content"

  73:          android:layout_height="wrap_content"

  74:          android:visibility="invisible"

  75:          app:layout_constraintBottom_toBottomOf="parent"

  76:          app:layout_constraintEnd_toEndOf="parent"

  77:          app:layout_constraintStart_toStartOf="parent"

  78:          app:layout_constraintTop_toTopOf="parent" />

  79:   

  80:  </androidx.constraintlayout.widget.ConstraintLayout>

  81:   

  82: