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headfirstandroid2ndedition's Introduction

Hello ๐Ÿ‘‹

I've been writing software since I was about 12 years old, but to be frank, some of the code from those early days wasn't very good, and you've probably never used it.

Since then, I have gone through puberty. That was quite traumatic, so I'll draw a veil over the details. Then came university and a variety of jobs that mostly involved typing.

I've written a few books, including ones on Android development and React web development.

I also give courses on the O'Reilly Media learning platform, and I present a video course called Business Writing Essentials that will show you in 90 minutes how to go from no ideas, and a blank page, to a fully finished piece of writing.

Watch the trailer

Aside from that, I'm the founder of a company that produces a cloud-based version of the old clocking-in and clocking-out machines, and provides development consultancy for Android and front-end web development.

I'm reasonably approachable unless it's before I've had coffee.

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headfirstandroid2ndedition's Issues

Chapter 2

Hi,

I don't know why my app don't want to run even I have put meticulously the code in Android Studio.

The Hello world App works fine, but once I have replaced the URLs by
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
. . . plus the code for adding the Spinner, the Run App finishes with error.

And I don't know why, the LinearLayout tag is not recognized at all.

I'm using the latest version of Android Studio.

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