XunfeiTTS-android/app/src/main/res/drawable/shape_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke
        android:width="1dp"
        android:color="@color/colorPrimary" />
    <corners android:radius="5dp" />
    <solid android:color="@null" />

</shape>