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Hello World app

Discussion in 'Android Apps & Games' started by hippolochus, Jul 24, 2020.

  1. hippolochus

    hippolochus Lurker
    Thread Starter

    I have been following video tutorials on Android Studio and I am referred to the hello world app.
    I found the video tutorial and all went well until about 5 minutes in on the "activity_main.xml" page. there are no Design and Text buttons on the bottom left as in the video. the display appears to be set in design.
    How do I switch to text mode or get the buttons?

    It seems as though Code and Design in the top right corner do the same thing. Perhaps this is a version issue.

    #1 hippolochus, Jul 24, 2020
    Last edited: Jul 24, 2020

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Bash Beginner's Guide

Bash Beginner's Guide Forum


Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. The Bash Beginner's Guide provides beginners with a simple introduction to the basics, and experts will find advanced details they need. In this you will see the following things below. Table of Contents Introduction 1. Why this guide? 2. Who should read this book? 3. New versions, translations and availability 4. Revision History 5. Contributions 6. Feedback 7. Copyright information 8. What do you need? 9. Conventions used in this document 10. Organization of this document 1. Bash and Bash scripts 1.1. Common shell programs 1.2. Advantages of the Bourne Again SHell 1.3. Executing commands 1.4. Building blocks 1.5. Developing good scripts 1.6. Summary 1.7. Exercises 2. Writing and debugging scripts 2.1. Creating and running a script 2.2. Script basics 2.3. Debugging Bash scripts 2.4. Summary 2.5. Exercises 3. The Bash environment 3.1. Shell initialization files 3.2. Variables 3.3. Quoting characters 3.4. Shell expansion 3.5. Aliases 3.6. More Bash options 3.7. Summary 3.8. Exercises 4. Regular expressions 4.1. Regular expressions 4.2. Examples using grep 4.3. Pattern matching using Bash features 4.4. Summary 4.5. Exercises 5. The GNU sed stream editor 5.1. Introduction 5.2. Interactive editing 5.3. Non-interactive editing 5.4. Summary 5.5. Exercises 6. The GNU awk programming language 6.1. Getting started with gawk 6.2. The print program 6.3. Gawk variables 6.4. Summary 6.5. Exercises 7. Conditional statements 7.1. Introduction to if 7.2. More advanced if usage 7.3. Using case statements 7.4. Summary 7.5. Exercises 8. Writing interactive scripts 8.1. Displaying user messages 8.2. Catching user input 8.3. Summary 8.4. Exercises 9. Repetitive tasks 9.1. The for loop 9.2. The while loop 9.3. The until loop 9.4. I/O redirection and loops 9.5. Break and continue 9.6. Making menus with the select built-in 9.7. The shift built-in 9.8. Summary 9.9. Exercises 10. More on variables 10.1. Types of variables 10.2. Array variables 10.3. Operations on variables 10.4. Summary 10.5. Exercises 11. Functions 11.1. Introduction 11.2. Examples of functions in scripts 11.3. Summary 11.4. Exercises 12. Catching signals 12.1. Signals 12.2. Traps 12.3. Summary 12.4. Exercises A. Shell Features A.1. Common features A.2. Differing features You will find all this section offline without any internet connection and lean DB easily anywhere and anytime.

October 18, 2019
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