左上,左下,右上,右下
四个角分别设置弧度即可
drawable/dialog_qrcode_button.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="@color/main_color" />
<corners
android:bottomLeftRadius="0dp"
android:bottomRightRadius="0dp"
android:topLeftRadius="5dp"
android:topRightRadius="5dp" />
</shape>
android:background="@drawable/dialog_qrcode_button"