Signal-Android/app/src/main/res/layout/credit_card_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <org.thoughtcrime.securesms.util.views.DarkOverflowToolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="@dimen/signal_m3_toolbar_height"
        android:background="@null"
        android:minHeight="@dimen/signal_m3_toolbar_height"
        android:theme="?attr/settingsToolbarStyle"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:navigationContentDescription="@string/DSLSettingsToolbar__navigate_up"
        app:navigationIcon="@drawable/ic_arrow_left_24"
        app:title="@string/CreditCardFragment__credit_or_debit_card"
        app:titleTextAppearance="@style/Signal.Text.TitleLarge" />

    <org.thoughtcrime.securesms.util.views.LearnMoreTextView
        android:id="@+id/description"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="12dp"
        android:paddingHorizontal="@dimen/core_ui__gutter"
        android:text="@string/CreditCardFragment__enter_your_card_details"
        android:textAppearance="@style/Signal.Text.BodyMedium"
        android:textColor="@color/signal_colorOnSurfaceVariant"
        app:layout_constraintTop_toBottomOf="@id/toolbar" />

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/card_number_wrapper"
        style="@style/Widget.Signal.TextInputLayout.FilledBox.ContactNameEditor"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:hint="@string/CreditCardFragment__card_number"
        app:boxStrokeColor="@color/signal_colorPrimary"
        app:boxStrokeErrorColor="@color/signal_colorError"
        app:errorEnabled="true"
        app:errorIconTint="@color/signal_colorError"
        app:errorTextColor="@color/signal_colorError"
        app:hintTextColor="@color/signal_colorPrimary"
        app:layout_constraintTop_toBottomOf="@id/description">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/card_number"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:digits="0123456789 "
            android:imeOptions="actionNext"
            android:inputType="number"
            android:maxLines="1"
            android:nextFocusDown="@id/card_expiry" />

    </com.google.android.material.textfield.TextInputLayout>

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/card_expiry_wrapper"
        style="@style/Widget.Signal.TextInputLayout.FilledBox.ContactNameEditor"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="12dp"
        android:hint="@string/CreditCardFragment__mm_yy"
        android:paddingEnd="18dp"
        app:boxStrokeColor="@color/signal_colorPrimary"
        app:boxStrokeErrorColor="@color/signal_colorError"
        app:errorEnabled="true"
        app:errorIconTint="@color/signal_colorError"
        app:errorTextColor="@color/signal_colorError"
        app:hintTextColor="@color/signal_colorPrimary"
        app:layout_constraintEnd_toStartOf="@id/card_cvv_wrapper"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/card_number_wrapper">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/card_expiry"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:digits="0123456789/"
            android:imeOptions="actionNext"
            android:inputType="datetime|date"
            android:maxLength="5"
            android:maxLines="1"
            android:nextFocusDown="@id/card_cvv" />

    </com.google.android.material.textfield.TextInputLayout>

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/card_cvv_wrapper"
        style="@style/Widget.Signal.TextInputLayout.FilledBox.ContactNameEditor"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="12dp"
        android:hint="@string/CreditCardFragment__cvv"
        android:paddingStart="18dp"
        app:boxStrokeColor="@color/signal_colorPrimary"
        app:boxStrokeErrorColor="@color/signal_colorError"
        app:errorEnabled="true"
        app:errorIconTint="@color/signal_colorError"
        app:errorTextColor="@color/signal_colorError"
        app:hintTextColor="@color/signal_colorPrimary"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/card_expiry_wrapper"
        app:layout_constraintTop_toBottomOf="@id/card_number_wrapper">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/card_cvv"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:imeOptions="actionDone"
            android:inputType="number"
            android:maxLength="4"
            android:maxLines="1" />

    </com.google.android.material.textfield.TextInputLayout>

    <com.google.android.material.button.MaterialButton
        android:id="@+id/continue_button"
        style="@style/Signal.Widget.Button.Large.Primary"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginHorizontal="@dimen/dsl_settings_gutter"
        android:layout_marginBottom="16dp"
        android:enabled="false"
        android:minWidth="220dp"
        android:text="@string/CreditCardFragment__donate_s"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>