habitica-android/Habitica/res/layout/dialog_challenge_detail.xml

<?xml version="1.0" encoding="utf-8"?>
<com.habitrpg.android.habitica.ui.MaxHeightLinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    android:orientation="vertical"
    app:maxHeightMultiplier="0.8">

    <LinearLayout
        android:id="@+id/challenge_not_joined_header"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginEnd="19dp"
        android:layout_marginLeft="24dp"
        android:layout_marginRight="19dp"
        android:layout_marginStart="24dp"
        android:layout_marginTop="24dp"
        android:orientation="vertical"
        android:visibility="gone"
        tools:visibility="visible">

        <TextView
            style="@style/Caption3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:height="20dp"
            android:text="Challenge"
            android:textAllCaps="true" />


    </LinearLayout>

    <LinearLayout
        android:id="@+id/challenge_joined_header"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:visibility="gone"
        tools:visibility="visible">

        <Button
            android:id="@+id/challenge_go_to_btn"
            style="@style/Widget.AppCompat.Button.Borderless"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginBottom="5dp"
            android:layout_marginTop="5dp"
            android:text="GO TO CHALLENGE"
            android:textColor="#6133b4"
            android:textSize="16sp" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#1f000000" />
    </LinearLayout>


    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_marginEnd="19dp"
        android:layout_marginLeft="24dp"
        android:layout_marginRight="19dp"
        android:layout_marginStart="24dp"
        android:layout_weight="8">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:scrollbarAlwaysDrawVerticalTrack="true"
            android:scrollbars="vertical">


            <net.pherth.android.emoji_library.EmojiTextView
                android:id="@+id/challenge_name"
                style="@style/Title2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="9dp"
                tools:text="Read a book by or about a person in your field of study" />

            <net.pherth.android.emoji_library.EmojiTextView
                android:id="@+id/challenge_description"
                style="@style/Body2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="11dp"
                android:lineSpacingExtra="4sp"
                tools:text="There’s always more to learn! Maybe it’s a specialized topic you’re interested in, or maybe it’s the experiences of a notable contributor. Read about it and you may win 15 gems!" />

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="28dp"
                android:layout_marginBottom="10dp"
                android:layout_marginTop="10dp"
                android:gravity="center_vertical">

                <TextView
                    android:id="@+id/challenge_leader"
                    style="@style/Body1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Some Leader"
                    android:textColor="#6133b4" />


            </LinearLayout>

        </LinearLayout>
    </ScrollView>

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#1f000000" />


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"

        android:layout_marginEnd="8dp"
        android:layout_marginLeft="24dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="24dp"
        android:orientation="horizontal">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="10dp"
            android:layout_marginTop="10dp"
            android:layout_weight="1"
            android:orientation="horizontal">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="center">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="36dp"
                    android:src="@drawable/dialogue_gem" />

                <TextView
                    android:id="@+id/gem_amount"
                    style="@style/Body1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    tools:text="15" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="17dp"
                android:layout_marginStart="17dp"
                android:gravity="center">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="36dp"
                    android:src="@drawable/dialogue_participants" />

                <TextView
                    android:id="@+id/challenge_member_count"
                    style="@style/Body1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    tools:text="15" />
            </LinearLayout>
        </LinearLayout>

        <Button
            android:id="@+id/challenge_join_btn"
            style="@style/Widget.AppCompat.Button.Borderless"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Join"
            android:textColor="#1ca372"
            android:textSize="16sp"
            android:visibility="gone"
            tools:visibility="visible" />

        <Button
            android:id="@+id/challenge_leave_btn"
            style="@style/Widget.AppCompat.Button.Borderless"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Leave"
            android:textColor="#d70e14"
            android:textSize="16sp"
            android:visibility="gone"
            tools:visibility="visible" />
    </LinearLayout>
</com.habitrpg.android.habitica.ui.MaxHeightLinearLayout>