Button - Custom button có hiệu ứng màu sắc giảm dần

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">


    <stroke        

     android:width="2dp"        

     android:color="#b31d0f"        

    />
    <solid 

      android:color="#262523"       

    />
    <gradient        

      android:angle="270"        

      android:endColor="#ff1e16"        

      android:startColor="#8f1b1b"        

    />
    <corners        

      android:radius="10dp"      

     >

    </corners>

</shape>