Codetown ::: a software developer's community
I am new to Android. I have been working thru some examples in a book called Head First Android Development. I entered a small program using fragments and get a Casting Error.
cannot cast andoid.app.fragment to com.hilights.rsobol.workout.WorkoutDetailFragment
I am hoping someone can download the attached zip file and show me the error of my ways. It is most likely a simple error that someone with some experience can see.
Thank you in advance for your help,
Rob
rsobol@hilightsinc.com
Tags:
Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.
Created by Michael Levin Dec 18, 2008 at 6:56pm. Last updated by Michael Levin May 4, 2018.
Check out the Codetown Jobs group.

Anthropic has unveiled a new feature called Skills, designed to let developers extend Claude with modular, reusable task components.
By Daniel Dominguez
Introducing Amazon EC2 Capacity Manager: AWS's new centralized solution for streamlined monitoring and management of EC2 capacity across all accounts and regions. This innovative tool consolidates data into a unified dashboard, enhancing efficiency while reducing operational complexity.
By Steef-Jan Wiggers
During Cloudflare's recent Birthday Week, the company announced the private preview of its Cloudflare Email Service. This new globally managed service enables developers to send and receive emails directly from Workers using native bindings, without the need for API keys.
By Renato Losio
Meta’s PyTorch team has launched Monarch, a framework that simplifies distributed AI workflows across multiple GPUs and machines. It uses a single-controller model to manage computations across a cluster, making large-scale training and reinforcement learning tasks easier while allowing developers to keep their standard PyTorch coding practices.
By Robert Krzaczyński
Airbnb’s engineering team re-architected its internal key-value storage system, Mussel, to unify streaming and bulk ingestion while simplifying operations, achieving over 100,000 writes per second and sub-25ms read latencies on 100-terabyte tables, while leveraging Kubernetes, Kafka, and a NewSQL backend to improve scalability, reliability, and operational efficiency across its internal services.
By Leela Kumili
© 2025 Created by Michael Levin.
Powered by