session-android/res/layout/registration_lock_reminder_view.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:tools="http://schemas.android.com/tools"
              android:orientation="vertical"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content">

    <LinearLayout android:id="@+id/header_container"
                  android:background="@color/signal_primary"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:orientation="horizontal"
                  android:gravity="center"
                  android:padding="40dp">

        <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="@color/white"
                android:textSize="18sp"
                android:gravity="center_horizontal"
                android:text="@string/registration_lock_reminder_view__enter_your_registration_lock_pin"/>

    </LinearLayout>

    <android.support.design.widget.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingTop="40dp"
            android:paddingLeft="80dp"
            android:paddingRight="80dp">

        <android.support.design.widget.TextInputEditText
                android:id="@+id/pin"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="numberPassword"
                android:hint="@string/registration_lock_reminder_view__enter_pin"/>

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

    <TextView android:id="@+id/reminder"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:paddingTop="40dp"
              android:paddingBottom="40dp"
              android:paddingLeft="20dp"
              android:paddingRight="20dp"
              android:textSize="15sp"
              android:lineSpacingMultiplier="1.3"
              tools:text="Reminder: Registration Lock is enabled for your phone number. To help you memorize your Registration Lock PIN, Signal will periodically ask you to confirm it. I forgot my PIN."/>

</LinearLayout>