[Android 앱 개발 입문]팀 과제 - 하이커스(2)메인 화면 UI 구현

🍥구현 기능

• 메인 화면 UI 구현하기
  
• 화면 상단:
  • 하이커스 아이콘 ImageView
  • 로그인한 회원 닉네임을 표시할 TextView
  • 로그인한 회원 프로필 이미지 ImageView
• 화면 중앙:
  • 게시글 10개를 표시할 ScrollView
  • 각 게시글:
    • 게시글 이미지 ImageView
    • 게시글 제목 TextView
    • 게시글 위치 정보 TextView
    • 게시글 작성자 이름 TextView
    • 게시글 작성 시간 TextView
    • 게시글 좋아요 여부를 표시할 ImageView
• 화면 하단:
  • 글쓰기 Floating Action Button

🍥구현하기

• 🔗github link

post_item.xml

• 메인 화면에서 게시글을 표시하는 레이아웃이 여러 번 중복된다
• 중복되는 레이아웃을 효율적으로 관리하기 위해 merge, include 태그를 사용했다
  • 게시글을 표시하는 레이아웃(post_item.xml)을 merge 태그로 감싼다
  • 메인 화면에서 include 태그를 이용해 해당 레이아웃을 여러 번 불러온다
• 📌참고자료: $<$include$>$ 태그로 레이아웃 재사용하기 | Android Developers

<merge 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">
    <LinearLayout
        android:id="@+id/layout_post"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <ImageView
            android:id="@+id/iv_img"
            android:transitionName="@string/trans_post_image"
            android:layout_width="match_parent"
            android:layout_height="180dp"
            android:scaleType="center"
            android:background="@color/light_gray"
            android:src="@drawable/hikers_icon_small_grey" />

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:padding="11dp">

            <TextView
                android:id="@+id/tv_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/post_title"
                android:ellipsize="end"
                android:maxWidth="180dp"
                android:maxLines="1"
                android:textSize="15sp"
                android:textStyle="bold"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <ImageView
                android:id="@+id/iv_pin"
                android:layout_width="12dp"
                android:layout_height="12dp"
                android:layout_marginStart="11dp"
                android:src="@drawable/pin_icon"
                app:layout_constraintBottom_toBottomOf="@id/tv_location"
                app:layout_constraintStart_toEndOf="@id/tv_title"
                app:layout_constraintTop_toTopOf="@id/tv_location" />

            <TextView
                android:id="@+id/tv_location"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="2dp"
                android:text="@string/post_location"
                android:textSize="10sp"
                app:layout_constraintBottom_toBottomOf="@id/tv_title"
                app:layout_constraintStart_toEndOf="@id/iv_pin"
                app:layout_constraintTop_toTopOf="@id/tv_title"/>

            <TextView
                android:id="@+id/tv_writer_name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/post_writer_name"
                android:textSize="10sp"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@id/tv_title"
                app:layout_constraintBottom_toBottomOf="parent"
                />
            <TextView
                android:id="@+id/tv_time"
                android:text="@string/post_time"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="11dp"
                app:layout_constraintStart_toEndOf="@id/tv_writer_name"
                app:layout_constraintTop_toBottomOf="@id/tv_title"
                app:layout_constraintBottom_toBottomOf="parent"
                android:textSize="8sp"
                />
            <ImageView
                android:id="@+id/iv_heart"
                android:layout_width="20dp"
                android:layout_height="20dp"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintBottom_toBottomOf="parent"
                android:src="@drawable/empty_heart_icon"
                />
        </androidx.constraintlayout.widget.ConstraintLayout>
    </LinearLayout>

</merge>

activity_main.xml

• 프로필 이미지를 표시할 ImageView를 원형으로 만들기 위해, CircularImageView 라이브러리를 사용했다.
  • 📌참고자료: CircleImageView | hdodenhof

• 게시물을 표시할 레이아웃(post_item_layout.xml)을 include 태그로 추가할 때,
  id 속성을 include 태그 안에 정의하는 대신, include 태그를 감싸는 LinearLayout안에 정의했다.
• 표시할 최신 게시물이 없는 경우, 안내 메세지를 표시하기 위해
  최신 게시글 목록을 표시하는 스크롤 뷰와 같은 위치에 TextView를 만들어두었다.

<?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:layout_margin="11dp"
    tools:context=".MainActivity">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/top_constraint_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="11dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <ImageView
            android:layout_width="120dp"
            android:layout_height="50dp"
            android:src="@drawable/hikers_icon_small"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/tv_user_greeting"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="11dp"
            android:text="@string/user_greeting"
            android:textSize="12sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="@id/iv_user_profile"
            app:layout_constraintTop_toTopOf="parent" />

        <de.hdodenhof.circleimageview.CircleImageView
            android:id="@+id/iv_user_profile"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:scaleType="centerCrop"
            android:src="@drawable/default_profile"
            android:transitionName="@string/trans_profile_image"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

    </androidx.constraintlayout.widget.ConstraintLayout>

    <TextView
        android:id="@+id/tv_no_post"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/no_post"
        android:textSize="12sp"
        android:visibility="gone"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/top_constraint_layout"
        tools:visibility="visible" />

    <ScrollView
        android:id="@+id/scroll_view_post"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/top_constraint_layout"
        app:layout_constraintVertical_bias="1.0">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <LinearLayout
                android:id="@+id/post_item1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/post_item2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/post_item3"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/post_item4"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>

            <LinearLayout
                android:id="@+id/post_item5"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/post_item6"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/post_item7"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/post_item8"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/post_item9"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/post_item10"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <include layout="@layout/post_item_layout" />
            </LinearLayout>
            <View
                android:layout_width="match_parent"
                android:layout_height="80dp"/>

        </LinearLayout>
    </ScrollView>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/floating_btn_write"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:backgroundTint="@color/theme_green1"
        android:src="@drawable/write_icon"
        app:fabCustomSize="40dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>