Shape Drawable로 간단한 배경 이미지 활용

https://developer.android.com/guide/topics/resources/drawable-resource?hl=ko#Shape 

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를 참고하면 된다.

 

실제로 비트맵을 사용하지  않아도 되므로 APK 파일 용량도 줄어들고 색상 변경이 편리하다.

 

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <solid android:color="#FF7272" />
    <size
        android:width="44dp"
        android:height="44dp" />
</shape>

oval : 타원형

rectangle : 사각형(default)

 

Layout 파일에서 사용법

<LinearLayout
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginTop="30dp"
    android:gravity="center"
    app:layout_constraintTop_toBottomOf="@id/addButton"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent">
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:background="@drawable/circle_red"
        android:gravity="center"
        android:textColor="@color/white"
        android:textSize="18sp"
        android:textStyle="bold"
        android:visibility="gone"
        tools:visibility="visible"
        tools:text="1" />
 
</LinearLayout>

shape_drawable.zip

0.00MB

 

kotlin 코드

private fun setNumberBackground(number:Int, textView: TextView) {
    when(number) {
        in 1..10 -> textView.background = ContextCompat.getDrawable(this, R.drawable.circle_yello)
        in 11..20 -> textView.background = ContextCompat.getDrawable(this, R.drawable.circle_blue)
        in 21..30 -> textView.background = ContextCompat.getDrawable(this, R.drawable.circle_red)
        in 31..40 -> textView.background = ContextCompat.getDrawable(this, R.drawable.circle_gray)
        else -> textView.background = ContextCompat.getDrawable(this, R.drawable.circle_green)
 
    }
}