안드로이드 정의 속성으로 커스텀 뷰 만들기

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 출처: http://hansune.tistory.com/551

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안드로이드 사용자 정의뷰(Custom View)를 만들고자 할 때 스타일 속성(attr)을 새로 만들어서 사용하게 된다.
그런데 일반적인 속성들(예를 들면 background, maxHeight, max, progress, Etc.)은 안드로이드 정의(android:)를 사용하는게
효율적이고 레이이아웃 xml 작성시에도 편리하다. 

예시 고고! 

1. android_mimic_attr.xml : 프로그레스바를 예시로 하면 안드로이드 프리픽스(Prefix)로 사용하는 것들을 동일하게 쓴다.

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<?xml version="1.0" encoding="utf-8"?> <resources>     <declare-styleable name="ProgressBar" >                 <attr name="android:progressDrawable" />         <attr name="android:minWidth" />         <attr name="android:maxWidth" />         <attr name="android:minHeight" />         <attr name="android:maxHeight" />         <attr name="android:max" />         <attr name="android:progress" />         <attr name="android:secondaryProgress" />     </declare-styleable>           <declare-styleable name="SeekBar" >         <attr name="android:thumb" />         <attr name="android:thumbOffset" />         <attr name="android:paddingTop" />         <attr name="android:paddingBottom" />     </declare-styleable>           <declare-styleable name="Theme" >         <attr name="android:disabledAlpha" />     </declare-styleable> </resources>

2. my_attr.xml : 안드로이드 프리픽스로 해결되지 않는 것들을 정의한다.

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<?xml version="1.0" encoding="utf-8"?> <resources>     <declare-styleable name=“CustomSeekBar" >         <attr name="thirdProgress" format="integer" />         <attr name="thirdProgressThick" format="dimension" />         <attr name="thirdProgressDrawable" format="reference" />     </declare-styleable> </resources>

3. test.xml : 레이아웃 xml 생성.

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<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:hansune="http://schemas.android.com/apk/res/com.hansune.sample"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="#ff000000”>   <com.hansune.sample.views.CustomSeekBar     android:id="@+id/airplayer_seekBar"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_marginBottom="2dp"     android:layout_marginTop="5dp"     android:maxHeight="5dp"     android:minHeight="5dp"     android:progressDrawable="@drawable/seekbar_progress"     android:thumb="@drawable/seekbar_thumb"     android:max="1000"     android:progress="500"     android:secondaryProgress="900"     hansune:thirdProgressDrawable="@drawable/seekbar_thirdprogress"     hansune:thirdProgress="700"     hansune:thirdProgressThick="1dp"     /> </RelativeLayout>

4. 이제 커스텀 뷰(CustomSeekBar)에서 어떻게 값을 접근하는지 봅세.

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//ProgressBar attr TypedArray a =         context.obtainStyledAttributes(attrs, R.styleable.ProgressBar, defStyle, 0); mMinWidth = a.getDimensionPixelSize(R.styleable.ProgressBar_android_minWidth, mMinWidth); mMaxWidth = a.getDimensionPixelSize(R.styleable.ProgressBar_android_maxWidth, mMaxWidth); mMinHeight = a.getDimensionPixelSize(R.styleable.ProgressBar_android_minHeight, mMinHeight); mMaxHeight = a.getDimensionPixelSize(R.styleable.ProgressBar_android_maxHeight, mMaxHeight); a.recycle(); //SeekBar attr a = context.obtainStyledAttributes(attrs, R.styleable.SeekBar, defStyle, 0); mThumb = a.getDrawable(R.styleable.SeekBar_android_thumb); a.recycle(); //Custom attr a = context.obtainStyledAttributes(attrs, R.styleable.CustomSeekBar, defStyle, 0); Drawable drawable = a.getDrawable(R.styleable.CustomSeekBar_thirdProgressDrawable); if(drawable != null) { setThirdProgressDrawable(drawable); } thirdProgress = a.getInt(R.styleable.CustomSeekBar_thirdProgress, 0); thirdProgressThick = a.getDimensionPixelSize(R.styleable.CustomSeekBar_thirdProgressThick , thirdProgressThick); a.recycle