Android - 在垂直线性布局中将两个 EditTexts 放在一行中

我有一个带有一些元素的垂直线性布局，但在一个位置我想要 2 个 EditTexts in 1 row。我在其中使用了水平线性布局，但 Android Studio 表示这对性能非常不利。

有没有办法在没有嵌套布局的情况下做到这一点？（XML 或以编程方式）

XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="fill_parent"
android:layout_height="fill_parent"
android:background="@color/cyan_50"
android:orientation="vertical"
tools:context="com.secutschett.RegisterActivity"
android:weightSum="100">

<android.support.design.widget.AppBarLayout
    android:layout_width="fill_parent"
    android:layout_height="?attr/actionBarSize"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="fill_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/cyan_700"
        app:popupTheme="@style/AppTheme.PopupOverlay"
        app:title="@string/app_name"
        app:titleTextColor="@color/cyan_50" />

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

<TextView
    android:id="@+id/step1TextView"
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10"
    android:text="@string/step1TextViewText"
    android:textAppearance="@style/TextAppearance.AppCompat.Headline" />

<TextView
    android:id="@+id/placeholder1"
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10" />

<EditText
    android:id="@+id/step1UsernameEditText"
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10"
    android:hint="@string/step1UsernameEditTextHint"
    android:inputType="text"
    android:maxLines="1"
    android:textAppearance="@style/TextAppearance.AppCompat"
    android:textColorHint="@color/blue_grey_400" />

<EditText
    android:id="@+id/step1NicknameEditText"
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10"
    android:hint="@string/step1NicknameEditTextHint"
    android:inputType="text"
    android:maxLines="1"
    android:textAppearance="@style/TextAppearance.AppCompat"
    android:textColorHint="@color/blue_grey_400" />

<TextView
    android:id="@+id/placeholder2"
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10" />

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10"
    android:orientation="horizontal">

    <EditText
        android:id="@+id/step1PasswordEditText"
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="50"
        android:hint="@string/step1PasswordEditTextHint"
        android:inputType="text|textPassword"
        android:maxLines="1"
        android:textAppearance="@style/TextAppearance.AppCompat"
        android:textColorHint="@color/blue_grey_400" />

    <EditText
        android:id="@+id/step1RepeatPasswordEditText"
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="50"
        android:hint="@string/step1RepeatPasswordEditTextHint"
        android:inputType="text|textPassword"
        android:maxLines="1"
        android:textAppearance="@style/TextAppearance.AppCompat"
        android:textColorHint="@color/blue_grey_400" />
</LinearLayout>

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10"
    android:orientation="horizontal">

    <EditText
        android:id="@+id/step1EmailAddressEditText"
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="50"
        android:hint="@string/step1EmailAddressEditTextHint"
        android:inputType="text|textEmailAddress"
        android:maxLines="1"
        android:textAppearance="@style/TextAppearance.AppCompat"
        android:textColorHint="@color/blue_grey_400" />

    <EditText
        android:id="@+id/step1RepeatEmailAddressEditText"
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="50"
        android:hint="@string/step1RepeatEmailAddressEditTextHint"
        android:inputType="text|textEmailAddress"
        android:maxLines="1"
        android:textAppearance="@style/TextAppearance.AppCompat"
        android:textColorHint="@color/blue_grey_400" />
</LinearLayout>

<TextView
    android:id="@+id/placeholder3"
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10" />

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10"
    android:orientation="horizontal">

    <Button
        android:id="@+id/step1RegisterButton"
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="30"
        android:text="@string/registerButtonName" />

    <TextView
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="10" />

    <CheckBox
        android:id="@+id/step1AgreeCheckBox"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="10" />

    <TextView
        android:id="@+id/step1PoliciesTextView"
        android:layout_width="0dip"
        android:layout_height="fill_parent"
        android:layout_weight="50"
        android:maxLines="10"
        android:text="@string/step1PoliciesTextViewText"
        android:textColorLink="@color/blue_500" />

</LinearLayout>

<com.roide.progressdotslib.ProgressDotWidget
    android:id="@+id/progress_dots1"
    android:layout_width="fill_parent"
    android:layout_height="0dip"
    android:layout_weight="10"
    android:background="@color/cyan_600"
    android:padding="@dimen/standard_margins" />

</LinearLayout>

它应该看起来如何