fedilab-Android-App/app/src/main/res/layout/activity_register.xml

<?xml version="1.0" encoding="utf-8"?><!--
    Copyright 2019 Thomas Schneider

    This file is a part of Fedilab

    This program is free software; you can redistribute it and/or modify it under the terms of the
    GNU General Public License as published by the Free Software Foundation; either version 3 of the
    License, or (at your option) any later version.

    Fedilab is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
    the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
    Public License for more details.

    You should have received a copy of the GNU General Public License along with Fedilab; if not,
    see <http://www.gnu.org/licenses>.
-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/fab_margin"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:animateLayoutChanges="true"
        android:orientation="vertical">
        <!-- category -->
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="@string/pickup_instance_category"
            android:textSize="16sp" />

        <Spinner
            android:id="@+id/reg_category"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="end"
            android:textSize="16sp" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/reg_category_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/form_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:visibility="gone">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/host_reg"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:gravity="center"
                android:textSize="18sp" />

            <TextView
                android:id="@+id/change_instance"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_marginStart="10dp"
                android:gravity="center" />
        </LinearLayout>

        <TextView
            android:id="@+id/invitation"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            android:text="@string/validation_needed"
            android:textColor="@color/red_1"
            android:visibility="gone" />

        <TextView
            android:id="@+id/error_message"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_margin="10dp"
            android:background="@drawable/red_border"
            android:gravity="center"
            android:padding="5dp"
            android:textColor="@color/red_1"
            android:visibility="gone" />

        <TextView
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:labelFor="@+id/username"
            android:text="@string/username" />

        <EditText
            android:id="@+id/username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="text"
            android:maxLength="30"
            android:singleLine="true" />

        <TextView
            android:id="@+id/username_indicator"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="12sp" />

        <TextView
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:labelFor="@+id/email"
            android:text="@string/email" />

        <EditText
            android:id="@+id/email"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="textEmailAddress"
            android:singleLine="true" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/email_indicator"
            android:textSize="12sp" />

        <TextView
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:labelFor="@+id/password"
            android:text="@string/password" />

        <EditText
            android:id="@+id/password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="textPassword"
            android:singleLine="true" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/password_indicator"
            android:textSize="12sp" />

        <TextView
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:labelFor="@+id/password_confirm"
            android:text="@string/password_confirm" />

        <EditText
            android:id="@+id/password_confirm"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="textPassword"
            android:singleLine="true" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <CheckBox
                android:id="@+id/agreement"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />

            <TextView
                android:id="@+id/agreement_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />
        </LinearLayout>

        <Button
            android:id="@+id/signup"
            style="@style/Base.Widget.AppCompat.Button.Colored"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/sign_up" />
    </LinearLayout>
</LinearLayout>