Tusky-App-Android/app/src/main/res/layout/activity_login.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true"
    tools:context="com.keylesspalace.tusky.LoginActivity">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:padding="16dp"
        android:gravity="center"
        android:layout_height="wrap_content">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="50dp"
            android:src="@drawable/elephant_friend"
            android:contentDescription="@string/description_elephant_friend" />

        <android.support.design.widget.TextInputLayout
            android:layout_height="wrap_content"
            android:layout_width="250dp">
            <EditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="textUri"
                android:hint="@string/hint_domain"
                android:ems="10"
                android:id="@+id/edit_text_domain" />
        </android.support.design.widget.TextInputLayout>

        <Button
            android:id="@+id/button_login"
            android:layout_width="250dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="4dp"
            android:textColor="@android:color/white"
            android:text="@string/action_login" />

        <TextView
            android:layout_width="250dp"
            android:layout_height="wrap_content"
            android:visibility="gone"
            android:id="@+id/text_error" />

        <TextView
            android:layout_width="250dp"
            android:layout_height="wrap_content"
            android:paddingTop="5dp"
            android:textAlignment="center"
            android:id="@+id/whats_an_instance"
            android:text="@string/link_whats_an_instance" />

    </LinearLayout>
</ScrollView>