[BACKEND]둥근 이미지 뷰_CircleImageView 활용

※ 둥근 이미지 뷰(CircleImageView)

둥근 이미지뷰가 필요할 때 사용하는 라이브러리입니다.
CircleImageView는 ImageView를 확장한 라이브러리이기 때문에
기본 사용법은 ImageView와 동일합니다.

https://developer.android.com/reference/android/widget/ImageView

1. 라이브러리 공식 웹 사이트

   https://github.com/hdodenhof/CircleImageView


2. CircleImageView 라이브러리 추가 방법

[build.gradle(Module)에 다음의 코드를 추가해 줍니다.
 그리고, 우측 상단 "Sync Project with Gradle Files" 버튼을 클릭해 줍니다]

dependencies {
implementation 'de.hdodenhof:circleimageview:2.2.0'
}

3. CircleImageView 라이브러리 사용 방법 : 사용방법은 간단하며,
   앞서 ImageView 대신에 CircleImageView를 사용하면 됩니다.
   참고로, 속성 정보 등 자세한 사항은 라이브러리 공식 웹 사이트 참고 바랍니다.

4. xml 파일에 구문 추가(예시 : activity_mail.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="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    tools:context=".MainActivity">

   <!--
    <de.hdodenhof.circleimageview.CircleImageView
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/rabbit_image"
        android:layout_width="96dp"
        android:layout_height="96dp"
        android:src="@drawable/rabbit"
        app:civ_border_width="2dp"
        app:civ_border_color="#FF000000"/>
     -->

    <de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/rabbit_image"
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:layout_gravity="center"
        android:background="@android:color/transparent"
        app:civ_border_overlay="true"
        app:civ_border_width="5dp"
        app:civ_border_color="#000000"
        android:src="@drawable/rabbit"
        />

</LinearLayout>

5. 예시 : activity_mail.xml 주요 구문 설명

   1) civ_border_overlay 속성 : CircleImageView의 테두리가 이미지와 겹칠 것인지 설정합니다.
                                      true면 이미지와 겹치게 테두리를 그리고 false면 이미지 바깥쪽에 테두리를 그립니다.
                                      default는 false입니다.

   2) civ_border_width 속성 : CircleImageView의 테두리 굵기입니다.

   3) civ_border_color 속성 : CircleImageView의 테두리 색상입니다.

   4) src : 원하는 이미지 resource 파일 지정

   5) 여기서는 CircleImageView로 rabbit 이미지에 app:civ_border_width 속성값으로
       5dp의 검은색 테두리를 그려주었습니다.

        [적용 소스 코드]
        app:civ_border_width="5dp"
        app:civ_border_color="#000000"
        android:src="@drawable/rabbit"

=================================================================================

1) ImageView  -  Android Developers

https://developer.android.com/reference/android/widget/ImageView

ImageView  |  Android Developers

2) GitHub - hdodenhof-CircleImageView- A circular ImageView for Android

https://github.com/hdodenhof/CircleImageView

GitHub - hdodenhof/CircleImageView: A circular ImageView for Android

3) 이미지 및 그래픽  -  Android 개발자  -  Android Developers

https://developer.android.com/guide/topics/graphics?hl=ko

이미지 및 그래픽  |  Android 개발자  |  Android Developers

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둥근 이미지 처리

https://github.com/hdodenhof/CircleImageView

GitHub - hdodenhof/CircleImageView: A circular ImageView for Android

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