signin layout

activity_main.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="@drawable/footballer"
    tools:context=".MainActivity">


    <android.support.design.widget.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="18dp"
        android:layout_marginBottom="8dp"
        android:textColorHint="@color/white"
        app:layout_constraintBottom_toTopOf="@+id/textInputLayout">

        <AutoCompleteTextView
            android:id="@+id/login_email"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/prompt_email"
            android:imeOptions="actionNext"
            android:inputType="textEmailAddress"
            android:maxLines="1"
            android:textColor="@color/white"
            android:textColorHint="@color/white"
            android:textIsSelectable="false" />

    </android.support.design.widget.TextInputLayout>

    <android.support.design.widget.TextInputLayout
        android:id="@+id/textInputLayout"
        android:layout_width="match_parent"
        android:layout_height="16dp"
        android:layout_marginBottom="8dp"
        android:textColorHint="@color/white"
        app:layout_constraintBottom_toTopOf="@+id/login_sign_in_button">

        <EditText
            android:id="@+id/login_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/prompt_password"
            android:imeActionId="@integer/login"
            android:imeActionLabel="@string/action_sign_in_short"
            android:imeOptions="actionUnspecified"
            android:inputType="textPassword"
            android:maxLines="1"
            android:textColor="@color/white"
            android:textColorHint="@color/white" />

    </android.support.design.widget.TextInputLayout>

    <Button
        android:id="@+id/login_sign_in_button"
        style="?android:textAppearanceMedium"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:background="@android:color/holo_green_light"
        android:onClick="signInExistingUser"
        android:text="SIGN IN"
        android:textColor="@android:color/background_light"
        android:textStyle="bold"
        app:layout_constraintBottom_toTopOf="@+id/login_register_button" />

    <Button
        android:id="@+id/login_register_button"
        style="?android:textAppearanceMedium"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:background="@android:color/background_light"
        android:onClick="registerNewUser"
        android:text="REGISTER"
        android:textColor="@android:color/holo_green_light"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent" />


</android.support.constraint.ConstraintLayout>