Android View Clipping

Try subclassing ViewGroup and overriding the OnDraw method as follows, substituting in values for RADIUS_IN_PIXELS:

@Override
protected void onDraw(Canvas canvas) {
    Path clipPath = new Path();
    clipPath.addRoundRect(new RectF(canvas.getClipBounds()), RADIUS_IN_PIXELS, RADIUS_IN_PIXELS, Path.Direction.CW);
    canvas.clipPath(clipPath);
    super.onDraw(canvas);
}

...and also create a custom drawable like this called something like 'rounded', substituting in YOUR_BACKGROUND_COLOR and RADIUS_IN_DP, making sure to match the rounding of the rectangle in DP to your previous clipping radius in PX:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="RADIUS_IN_DP" />
    <solid android:color="YOUR_BACKGROUND_COLOR"/>
</shape>

Then you can use that subclass in your layout, adding the lines

android:background="@drawable/rounded"
android:clipChildren="true"

All children will clip to the bounds you specify in the OnDraw() override, and a background will be added based on your 'rounded' drawable.

Make sure layout has a background with rounded corners.

Kotlin

layout.outlineProvider = ViewOutlineProvider.BACKGROUND
layout.clipToOutline = true

Java

layout.setOutlineProvider(ViewOutlineProvider.BACKGROUND);
layout.setClipToOutline(true);

Create custom layout with overridden onDraw(Canvas canvas)

call canvas.clipRect(0, 0, mCanvasWidth, mCanvasHeight);

this will clip all views that goes out of layout boundary.

And don't forget to call setWillNotDraw(false) in constructor, so your onDraw will execute