Android: Login and Signup using SQLite in Android Studio(2)

❗❗이 게시물은 Youtube https://www.youtube.com/watch?v=zz659HPTe6M 을 보고 작성되었습니다❗❗

1. activity_login.xml 파일 내용

<EditText
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/signupUsername"
        android:hint="Username"
        android:padding="12dp"
        android:background="@drawable/edittext_boarder"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/signupUserphonenumber"
        android:layout_marginTop="50dp"
        android:layout_marginBottom="8dp"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        />

constraintStart_toStartOf="parent":왼쪽 방향을 부모의 왼쪽과 관계시키기
constraintEnd_toEndOf="parent": 오른쪽 방향을 부모의 오른쪽과 관계
constraintTop_toTopOf="parent": 위쪽 방향을 부모의 위쪽과 관계
constraintBottom_toTopof="@+id/signupUserphonenumber": 아래쪽 방향을 "@+id/signupUserphonenumber"의 위쪽과 관계

📒여기서 Of를 of라 쓰면 생각한것과 다른 모양이 나온다. 처음에 이걸 모르고 오류만 한참 찾음..

#### 2. drawable/icon_login_account.xml drawable->new->VectorAsset이용해서 login페이지에서 사용할 아이콘 저장하기

3. activity_login.xml

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/signup_background"
    android:padding="16dp"
    tools:context=".LoginActivity">

    
    <ImageView
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:id="@+id/icon"
        android:background="@drawable/icon_login_account"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/loginPage"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginTop="16dp"
        android:layout_marginBottom="16dp"
        />
    
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/loginPage"
        android:text="LOGIN PAGE"
        android:layout_gravity="center"
        android:textSize="30dp"
        android:gravity="center"
        app:layout_constraintTop_toBottomOf="@+id/icon"
        app:layout_constraintBottom_toTopOf="@+id/signupId"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginTop="16dp"
        android:layout_marginBottom="16dp"
        />



    <EditText
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/signupId"
        android:hint="Id"
        android:inputType="phone"
        android:padding="12dp"
        android:background="@drawable/edittext_boarder"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/loginPage"
        app:layout_constraintBottom_toTopOf="@+id/signupPassword"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"

        />

    <EditText
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/signupPassword"
        android:hint="Password"
        android:inputType="textPassword"
        android:padding="12dp"
        android:background="@drawable/edittext_boarder"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/signupId"
        app:layout_constraintBottom_toTopOf="@+id/signupButton"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        />

    <Button
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/signupButton"
        android:text="SIGNUP"
        android:backgroundTint="@color/gray"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        app:layout_constraintBottom_toTopOf="@+id/socialLogin"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@id/signupPassword"/>

    <TextView
        android:id="@+id/socialLogin"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:gravity="center"
        android:text="Social Login"
        android:textColor="@color/main"
        android:textSize="18dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/signupButton" />

</androidx.constraintlayout.widget.ConstraintLayout>

처음에 만들었던 activity_signup.xml을 좀 변형해서 만들었다.
📒배치가 이상하면 제약조건에 문제가 있는 것일 확률이 99%!! 꼭 확인해주기