Passwordless authentication androidbuffer.com

fragment_sms_send.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="@color/white"
    tools:context="com.android.buffer.smsauth.MainActivity">

    <FrameLayout
        android:background="@color/colorPrimary"
        android:layout_width="0dp"
        android:layout_height="250dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:id="@+id/frameLayout">

        <TextView
            android:layout_marginTop="16dp"
            android:layout_gravity="center"
            android:drawableTop="@drawable/ic_logo"
            android:alpha=".8"
            android:textColor="@color/white"
            android:padding="16dp"
            android:gravity="center"
            android:textSize="34dp"
            android:lineSpacingExtra="4dp"
            android:textAppearance="@style/TextAppearance.AppCompat.Widget.PopupMenu.Header"
            android:text="android Buffer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </FrameLayout>

    <EditText
        android:layout_margin="16dp"
        android:paddingTop="16dp"
        android:paddingBottom="16dp"
        android:paddingRight="16dp"
        android:id="@+id/editTextCode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:ems="10"
        android:textSize="20sp"
        android:inputType="textPersonName"
        android:text="@string/text_india_91"
        android:editable="false"
        android:textAppearance="@style/Base.TextAppearance.AppCompat.Widget.PopupMenu.Header"
        android:focusable="false"
        android:focusableInTouchMode="false"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/frameLayout"
        app:layout_constraintHorizontal_bias="0.503" />

    <EditText
        android:layout_margin="16dp"
        android:paddingTop="16dp"
        android:paddingBottom="16dp"
        android:paddingRight="16dp"
        android:id="@+id/editTextPhone"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:ems="10"
        android:textSize="20sp"
        android:inputType="phone"
        android:maxLines="1"
        android:maxLength="10"
        android:hint="@string/hint_your_phone_number"
        android:textAppearance="@style/Base.TextAppearance.AppCompat.Widget.PopupMenu.Header"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextCode"
        app:layout_constraintHorizontal_bias="0.503" />

    <android.support.v7.widget.AppCompatImageButton
        android:id="@+id/imageViewSend"
        android:src="@drawable/ic_action_go"
        android:background="@drawable/round_button"
        android:layout_width="54dp"
        android:layout_height="54dp"
        android:layout_margin="16dp"
        android:padding="8dp"
        app:layout_constraintBottom_toTopOf="@+id/textViewMsg"
        app:layout_constraintTop_toBottomOf="@+id/editTextPhone"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent" />

    <TextView
        android:id="@+id/textViewMsg"
        android:padding="16dp"
        android:textColor="@android:color/secondary_text_dark"
        android:gravity="center"
        android:text="We will send you one time password Sms charges may apply"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent" />

</android.support.constraint.ConstraintLayout>