examples/android/helloworld/app/src/main/res/layout/activity_main.xml

<LinearLayout 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:gravity="center_horizontal"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.helloworld.MainActivity">

    <ScrollView
        android:id="@+id/login_form"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:id="@+id/email_login_form"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <android.support.design.widget.TextInputLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/hint_plaintext"
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="@string/hint_plaintext" />
                <EditText
                    android:id="@+id/plaintext"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:hint="@string/prompt_plaintext"
                    android:inputType="textMultiLine"
                    android:lines="3"
                    android:minLines="3"
                    android:maxLines="10" />

            </android.support.design.widget.TextInputLayout>

            <android.support.design.widget.TextInputLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/hint_associated_data"
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="@string/hint_associated_data" />

                <EditText
                    android:id="@+id/associated_data"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:hint="@string/prompt_associated_data"
                    android:inputType="textMultiLine"
                    android:lines="3"
                    android:minLines="3"
                    android:maxLines="10" />

            </android.support.design.widget.TextInputLayout>

            <android.support.design.widget.TextInputLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/hint_ciphertext"
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:text="@string/hint_ciphertext" />
                <EditText
                    android:id="@+id/ciphertext"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:hint="@string/prompt_ciphertext"
                    android:inputType="textMultiLine"
                    android:lines="3"
                    android:minLines="3"
                    android:maxLines="10" />

            </android.support.design.widget.TextInputLayout>

            <Button
                android:id="@+id/encrypt_button"
                style="?android:textAppearanceSmall"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/action_encrypt"
                android:textStyle="bold" />

            <Button
                android:id="@+id/decrypt_button"
                style="?android:textAppearanceSmall"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="@string/action_decrypt"
                android:textStyle="bold" />

        </LinearLayout>
    </ScrollView>
</LinearLayout>