content_otp.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:background="@android:color/white"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="60dp"
        android:text="@string/verification_code"
        android:textColor="@color/defaultTextColor"
        android:textSize="16sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/phone_"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:lineSpacingExtra="4dp"
        android:text="@string/please_type_the_verification_code_sent_to_n_9xxxxxxx19"
        android:textAlignment="center"
        android:textColor="@color/defaultTextColor"
        android:textSize="14sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView" />

    <in.aabhasjindal.otptextview.OtpTextView
        android:id="@+id/otp_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/black"
        app:bar_active_color="@color/black"
        app:bar_enabled="true"
        app:bar_error_color="@color/red"
        app:bar_height="1.5dp"
        app:bar_inactive_color="@color/grey"
        app:bar_margin_bottom="0dp"
        app:bar_margin_left="2dp"
        app:bar_margin_right="2dp"
        app:bar_success_color="@color/green"
        app:box_margin="0dp"
        app:height="40dp"
        app:hide_otp="true"
        app:hide_otp_drawable="@drawable/black_circle"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:length="4"
        app:otp=""
        app:otp_text_size="20dp"
        app:width="40dp" />

    <TextView
        android:id="@+id/timer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="72dp"
        android:textColor="@color/defaultTextColor"
        android:textSize="18sp"
        android:fontFamily="sans-serif"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/otp_view" />
</android.support.constraint.ConstraintLayout>