Guideline

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    tools:context=".RLayout">

    <!-- 表单区域辅助线：位于父容器高度 30% 的位置 -->
    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/form_guide_line"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.3" />

    <!-- 其他登录区域辅助线：位于父容器高度 70% 的位置 -->
    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/other_guide_line"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.7" />

    <TextView
        android:id="@+id/tv_skip"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="跳过"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <ImageView
        android:id="@+id/iv_logo"
        android:layout_width="96dp"
        android:layout_height="96dp"
        android:layout_marginTop="24dp"
        android:src="@drawable/ic_launcher_foreground"
        app:layout_constraintTop_toBottomOf="@id/tv_skip"
        app:layout_constraintBottom_toTopOf="@id/form_guide_line"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintVertical_bias="0.45" />

    <TextView
        android:id="@+id/tv_username"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="用户名:"
        app:layout_constraintTop_toTopOf="@id/form_guide_line"
        app:layout_constraintStart_toStartOf="parent" />

    <EditText
        android:id="@+id/et_username"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:hint="请输入用户名"
        android:inputType="textPersonName"
        app:layout_constraintTop_toBottomOf="@id/tv_username"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <TextView
        android:id="@+id/tv_password"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:text="密码:"
        app:layout_constraintTop_toBottomOf="@id/et_username"
        app:layout_constraintStart_toStartOf="parent" />

    <EditText
        android:id="@+id/et_password"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:hint="请输入密码"
        android:inputType="textPassword"
        app:layout_constraintTop_toBottomOf="@id/tv_password"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <Button
        android:id="@+id/btn_sign"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="12dp"
        android:text="登录"
        app:layout_constraintTop_toBottomOf="@id/et_password"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <!-- 其他登录区域分割线 -->
    <View
        android:id="@+id/divider_other"
        android:layout_width="0dp"
        android:layout_height="1dp"
        android:background="#DDDDDD"
        app:layout_constraintTop_toTopOf="@id/other_guide_line"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <TextView
        android:id="@+id/tv_other"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="12dp"
        android:text="其他登录方式"
        app:layout_constraintTop_toBottomOf="@id/other_guide_line"
        app:layout_constraintStart_toStartOf="parent" />

    <ImageView
        android:id="@+id/iv_wechat"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_marginTop="16dp"
        android:src="@drawable/ic_launcher_foreground"
        app:layout_constraintTop_toBottomOf="@id/tv_other"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toStartOf="@id/iv_weibo"
        app:layout_constraintHorizontal_chainStyle="spread" />

    <ImageView
        android:id="@+id/iv_weibo"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:src="@drawable/ic_launcher_foreground"
        app:layout_constraintTop_toTopOf="@id/iv_wechat"
        app:layout_constraintStart_toEndOf="@id/iv_wechat"
        app:layout_constraintEnd_toStartOf="@id/iv_qq" />

    <ImageView
        android:id="@+id/iv_qq"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:src="@drawable/ic_launcher_foreground"
        app:layout_constraintTop_toTopOf="@id/iv_wechat"
        app:layout_constraintStart_toEndOf="@id/iv_weibo"
        app:layout_constraintEnd_toEndOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>