app/src/main/res/layout/authentication_dialog.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <EditText
            android:id="@+id/etxtUsername"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:layout_margin="16dp"
            android:hint="@string/username_label"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:cursorVisible="true"/>

        <EditText
            android:id="@+id/etxtPassword"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:layout_margin="16dp"
            android:inputType="textPassword"
            android:hint="@string/password_label"
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:cursorVisible="true"/>

        <CheckBox
            android:id="@+id/chkSaveUsernamePassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="@string/save_username_password_label"/>


    </LinearLayout>

    <LinearLayout
        style="@android:style/ButtonBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/butConfirm"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginRight="8dp"
            android:text="@string/confirm_label"
            android:layout_weight="1"/>

        <Button
            android:id="@+id/butCancel"
            android:text="@string/cancel_label"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>
    </LinearLayout>

</LinearLayout>