session-android/res/layout/registration_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
                  xmlns:app="http://schemas.android.com/apk/res-auto"
                  android:layout_width="fill_parent"
                  android:layout_height="fill_parent"
                  xmlns:tools="http://schemas.android.com/tools"
                  android:fillViewport="true"
                  android:background="@color/white"
                  tools:context=".RegistrationActivity">

    <RelativeLayout android:layout_width="match_parent"
                    android:layout_height="wrap_content">

        <LinearLayout android:id="@+id/header"
                      android:layout_width="match_parent"
                      android:layout_height="wrap_content"
                      android:layout_alignParentTop="true"
                      android:orientation="vertical"
                      android:background="@color/signal_primary"
                      android:padding="16dp">

            <TextView android:id="@+id/verify_header"
                      android:layout_width="match_parent"
                      android:layout_height="wrap_content"
                      android:paddingBottom="16dp"
                      android:text="@string/registration_activity__verify_your_number"
                      android:textSize="20sp"
                      android:textStyle="bold"
                      android:textColor="@color/white"
                      android:layout_gravity="center"
                      android:gravity="center"/>

            <TextView android:id="@+id/verify_subheader"
                      android:layout_width="match_parent"
                      android:layout_height="wrap_content"
                      android:paddingBottom="25dp"
                      android:textColor="@color/white"
                      android:text="@string/registration_activity__please_enter_your_mobile_number_to_receive_a_verification_code_carrier_rates_may_apply"
                      android:gravity="center"/>

        </LinearLayout>

        <android.support.design.widget.FloatingActionButton
                app:fabSize="normal"
                app:backgroundTint="@color/white"
                app:elevation="1dp"
                android:id="@+id/fab"
                android:transitionName="icon"
                android:src="@drawable/ic_action_name"
                android:tint="@color/grey_700"
                android:rotation="15"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignBottom="@id/header"
                android:layout_centerHorizontal="true"
                android:layout_marginBottom="-32dp"/>

        <LinearLayout android:id="@+id/registration_container"
                      android:padding="16dp"
                      android:paddingBottom="0dp"
                      android:layout_marginTop="30dp"
                      android:layout_below="@id/header"
                      android:layout_width="fill_parent"
                      android:layout_height="wrap_content"
                      android:animateLayoutChanges="true"
                      android:orientation="vertical"
                      tools:visibility="invisible">

            <Spinner android:id="@+id/country_spinner"
                     android:layout_width="fill_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="16dip" />

            <LinearLayout android:orientation="horizontal"
                          android:layoutDirection="ltr"
                          android:layout_width="fill_parent"
                          android:layout_height="wrap_content">

                <TextView android:layout_width="wrap_content"
                          android:layout_height="wrap_content"
                          android:textSize="20sp"
                          style="@style/Registration.Constant"
                          android:text="+" />

                <EditText android:id="@+id/country_code"
                          android:layout_width="55dip"
                          android:layout_height="wrap_content"
                          android:singleLine="true"
                          android:gravity="center"
                          android:inputType="phone"
                          android:digits="0123456789"
                          android:maxLength="3" />

                <EditText android:id="@+id/number"
                          android:layout_width="0dip"
                          android:layout_height="wrap_content"
                          android:layout_weight="1"
                          android:inputType="phone"
                          android:hint="@string/registration_activity__phone_number"
                          android:gravity="center"
                          android:singleLine="true"/>

            </LinearLayout>

            <com.dd.CircularProgressButton
                    android:id="@+id/registerButton"
                    app:cpb_textIdle="Register"
                    app:cpb_selectorIdle="@drawable/progress_button_state"
                    app:cpb_colorIndicator="@color/white"
                    app:cpb_colorProgress="@color/textsecure_primary"
                    app:cpb_cornerRadius="50dp"
                    android:background="@color/signal_primary"
                    android:textColor="@color/white"
                    android:layout_width="match_parent"
                    android:layout_height="50dp"
                    android:layout_marginLeft="16dp"
                    android:layout_marginRight="16dp"
                    android:layout_marginTop="20dp"
                    android:layout_gravity="center_horizontal"/>

            <TextView android:id="@+id/skip_button"
                      android:layout_gravity="center_horizontal"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:layout_marginTop="20dp"
                      android:textColor="@color/gray50"
                      android:text="@android:string/cancel"/>

            <TextView style="@style/Registration.Description"
                      android:id="@+id/registration_information"
                      android:layout_width="fill_parent"
                      android:gravity="start"
                      android:visibility="gone"
                      android:layout_marginBottom="16dp"
                      android:layout_marginTop="16dp"
                      android:text="@string/registration_activity__registration_will_transmit_some_contact_information_to_the_server_temporariliy"/>

            <LinearLayout android:id="@+id/information_link_container"
                          android:clickable="true"
                          android:orientation="horizontal"
                          android:layout_width="wrap_content"
                          android:layout_height="wrap_content"
                          android:layout_marginTop="16dp"
                          android:layout_marginBottom="16dip">

                <ImageView android:layout_width="wrap_content"
                           android:layout_height="wrap_content"
                           android:clickable="false"
                           android:src="@drawable/ic_info_white_18dp"
                           android:tint="#73B7F0"/>

                <TextView style="@style/Registration.Description"
                          android:id="@+id/information_label"
                          android:clickable="false"
                          android:layout_width="wrap_content"
                          android:layout_height="wrap_content"
                          android:layout_marginLeft="3dp"
                          android:layout_gravity="center_vertical"
                          android:textColor="#73B7F0"
                          android:text="@string/RegistrationActivity_more_information"/>
            </LinearLayout>


        </LinearLayout>

        <RelativeLayout android:id="@+id/verification_container"
                        android:visibility="invisible"
                        android:layout_below="@id/header"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        tools:visibility="visible">

            <org.thoughtcrime.securesms.components.registration.VerificationCodeView
                    android:id="@+id/code"
                    android:layout_alignParentTop="true"
                    android:layout_centerHorizontal="true"
                    android:layout_marginTop="50dp"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    app:vcv_inputWidth="30dp"
                    app:vcv_spacing="10dp"
                    app:vcv_textColor="@color/signal_primary"
                    app:vcv_inputColor="@color/grey_600"/>

            <org.thoughtcrime.securesms.components.registration.CallMeCountDownView
                    android:id="@+id/call_me_count_down"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@id/code"
                    android:layout_marginTop="30dp"
                    android:paddingLeft="16dp"
                    android:paddingRight="16dp"/>

            <org.thoughtcrime.securesms.components.registration.VerificationPinKeyboard
                    android:id="@+id/keyboard"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentBottom="true"/>

        </RelativeLayout>
    </RelativeLayout>

</ScrollView>