allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

 	        dependencies {
        	        implementation 'com.github.yhongm:ScaleView:master'
        	}

      <com.yhongm.scale_core.ScaleView
        android:id="@+id/arc_scaleview"
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:layout_centerInParent="true"
        app:arcLineColor="#ff0000"
        app:drawLineSpace="1"
        app:drawTextSpace="5"
        app:everyScaleValue="1"
        app:indicatorColor="#1cffaf"
        app:scaleLineColor="#0000ff"
        app:scaleMin="200"
        app:scaleNum="30"
        app:shape="arc"
        app:scaleSpace="1"
        app:scaleTextColor="#0000ff"
        app:scaleUnit="单位"
        app:selectTextColor="#1fffff" />