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

    <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:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingHorizontal="25dp"
        tools:context=".LoginActivity">

        <EditText
            android:id="@+id/username"
            android:layout_width="match_parent"
            android:layout_height="68dp"
            android:text="xuqinmin"
            android:layout_marginBottom="25dp"
            android:hint="请输入用户名"
            app:layout_constraintBottom_toTopOf="@+id/pwd"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />

        <EditText
            android:id="@+id/pwd"
            android:layout_width="match_parent"
            android:layout_height="68dp"
            android:hint="请输入密码"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/button"
            android:layout_width="match_parent"
            android:layout_height="68dp"
            android:layout_marginTop="35dp"
            android:text="登录"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/pwd" />
    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>