How to change the title of an Android Activity shown in the Action Bar? [Solution]

To change the Title of an Action Bar which is basically the title of an activity:

Open the AndroidManifest.xml file and edit the label of an activity as shown:

That’s it!!!
I hope it was helpful.
If you have any query or doubt leave them in the comments section down below.

I’m a physicist specializing in computational material science with a PhD in Physics from Friedrich-Schiller University Jena, Germany. I write efficient codes for simulating light-matter interactions at atomic scales. I like to develop Physics, DFT, and Machine Learning related apps and software from time to time. Can code in most of the popular languages. I like to share my knowledge in Physics and applications using this Blog and a YouTube channel.

manas.bragitoff.com/