如何在Android中淡化TextView的边缘？

    <solid android:color="@android:color/white" />
    <corners android:radius="10dp" />
   <stroke
        android:width="1dp"
        android:color="#D3D3D3" />
</shape>

    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/textview_background"
    android:padding="10dp"
    android:text="Hello World!" />

public class RoundedOutlineProvider extends ViewOutlineProvider {
    @Override
    public void getOutline(View view, Outline outline) {
        int radius = view.getContext().getResources().getDimensionPixelSize(R.dimen.corner_radius);
        outline.setRoundRect(0, 0, view.getWidth(), view.getHeight(), radius);
    }
}

TextView textView = findViewById(R.id.my_text_view);
textView.setOutlineProvider(new RoundedOutlineProvider());
textView.setClipToOutline(true);

    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:cardCornerRadius="10dp"
    app:cardElevation="0dp">

   <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:text="Hello World!" />

</androidx.cardview.widget.CardView>