--- /dev/null
+<?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:id="@+id/mainRoot"
+ android:layout_width="match_parent"
+ android:layout_height="match_parent"
+ tools:context=".AndroidReaderActivity">
+
+ <EditText
+ android:id="@+id/editText"
+ android:layout_width="177dp"
+ android:layout_height="38dp"
+ android:layout_marginStart="8dp"
+ android:layout_marginTop="8dp"
+ android:ems="10"
+ android:inputType="textPersonName"
+ android:text="@string/enter_text"
+ app:layout_constraintStart_toStartOf="parent"
+ app:layout_constraintTop_toTopOf="parent" />
+
+ <Button
+ android:id="@+id/button"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:layout_marginEnd="8dp"
+ android:layout_marginStart="8dp"
+ android:onClick="onClick"
+ android:text="Download if needed"
+ app:layout_constraintBottom_toBottomOf="@+id/editText"
+ app:layout_constraintEnd_toEndOf="parent"
+ app:layout_constraintHorizontal_bias="1.0"
+ app:layout_constraintStart_toEndOf="@+id/editText" />
+
+ <Button
+ android:id="@+id/button2"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:layout_marginEnd="8dp"
+ android:layout_marginStart="8dp"
+ android:layout_marginTop="28dp"
+ android:onClick="buttonClick"
+ android:text="Add all sources"
+ app:layout_constraintEnd_toEndOf="parent"
+ app:layout_constraintHorizontal_bias="0.472"
+ app:layout_constraintStart_toStartOf="parent"
+ app:layout_constraintTop_toBottomOf="@+id/editText" />
+
+ <LinearLayout
+ android:id="@+id/dropZone"
+ android:layout_width="363dp"
+ android:layout_height="wrap_content"
+ android:layout_marginEnd="8dp"
+ android:layout_marginStart="8dp"
+ android:layout_marginTop="88dp"
+ android:orientation="vertical"
+ app:layout_constraintEnd_toEndOf="parent"
+ app:layout_constraintStart_toStartOf="parent"
+ app:layout_constraintTop_toBottomOf="@+id/editText"></LinearLayout>
+
+</android.support.constraint.ConstraintLayout>