For rectangular buttons, use the selectableItemBackground attribute in the foreground to apply a default ripple effect.

<TextView
    android:id="@+id/btn_submit"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#06CD5D"
    android:foreground="?selectableItemBackground"
    android:text="Submit" />

When using a custom rounded background, the ripple effect may not match the buton's shape. To create a rounded button with a matching ripple, define a ripple drawable.

Create a shape drawable for the button background:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#06CD5D" />
    <corners android:radius="25dp" />
</shape>

Define a ripple drawable that references the shape:

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="#22000000">
    <item android:drawable="@drawable/rounded_button_background" />
</ripple>

Apply the ripple drawable as the button's background:

<TextView
    android:id="@+id/btn_action"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/ripple_rounded_button"
    android:text="Action" />

This approach ensures the ripple effect conforms to the button's rounded corners, porviding a consistent visual feedback during user interaction.