
custom progress bar를 만들고 있는데, ring shape으로 선을 그릴때, 
빨간 동그라미 부분의 선끝을 둥글게 만들고 싶은데 어떻게 해야 하나요?? ㅠ

 
 
progress.xml 
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="288"
    android:toDegrees="288"
    android:pivotX="50%"
    android:pivotY="50%">
    <shape
        android:innerRadiusRatio="2.3"
        android:shape="ring"
        android:thickness="7dp"
        android:useLevel="true"><!-- this line fixes the issue for lollipop api 21 -->
        <gradient
            android:angle="270"
            android:endColor="#6b9af2"
            android:startColor="#6b9af2"
            android:type="sweep"
            android:useLevel="false" />
    </shape>
</rotate> 
prograss_bar.xml
    <ProgressBar
        android:id="@+id/progress_bar"
        android:layout_marginTop="156px"
        android:layout_marginLeft="-200px"
        android:layout_width="400px"
        android:layout_height="400px"
        android:indeterminate="false"
        android:progressDrawable="@drawable/progress"
        style="?android:attr/progressBarStyleHorizontal"
        android:max="360"
        android:progress="144" />