material-dialogs/library/src/main/res/layout/md_dialog_input.xml

<com.afollestad.materialdialogs.internal.MDRootLayout xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:md_reduce_padding_no_title_no_buttons="false"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <include layout="@layout/md_stub_titleframe" />

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:paddingLeft="@dimen/md_dialog_frame_margin"
        android:paddingRight="@dimen/md_dialog_frame_margin"
        android:paddingTop="@dimen/md_content_padding_top"
        android:paddingBottom="@dimen/md_content_padding_bottom">

        <TextView
            android:id="@+id/content"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif"
            android:textSize="@dimen/md_content_textsize"
            android:layout_marginTop="4dp"
            android:layout_marginBottom="12dp"
            android:layout_marginLeft="2dp"
            android:layout_marginRight="2dp"
            tools:text="Message"
            android:layout_gravity="center_horizontal"
            tools:ignore="UnusedAttribute" />

        <EditText
            android:id="@android:id/input"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="@dimen/md_content_textsize"
            tools:ignore="TextFields" />

    </LinearLayout>

    <include layout="@layout/md_stub_actionbuttons" />

</com.afollestad.materialdialogs.internal.MDRootLayout>