How To Generate A Signed APK.

By Christine Wasike,

Moringa School Staff.

So most of us junior Android developers still need some time trying to get used to and keep up with all the technologies in the vast Android field. I basically want to lay out a road map that I hope will help most of you when it comes to building your application and putting it up on play store. More specifically, how to generate a signed APK.

Here it goes:

What you will first need is to sign up for a Google Play Developer account using your Play Console.

Step One : Build Project

This basically entails putting your app together in a presentable manner after creating it to meet the MVP standards, having curbed bugs within your code and having resolved possible crashes.

In the menu bar, Select Build > Generate Signed APK.


At this point, a dialog box will pop up prompting you to fill up the necessary blank fields. That is key store path, key store password, key alias and finally the key password. You can opt to use an existing key and key store or create a new one. It is advisable to use an existing one for all your apps because it ensures that any future updates to your APK are authentic and come from the original author. We will however be creating a new key and keystore here.

Step Two :Click Create new

Generating a signed APK.PNG

Create a new key and keystore

Step Three: Provide the necessary information for your key and key store

Create a new keystore on android studio.PNG


  • Key store path: This is where you would like keystore to be created.


  • Alias: This is an identifying name for your key.
  • Validity(years): Your key should be valid for at least 25 years, so you can sign app updates with the same key through the lifespan of your app.

Once done, click OK.

Step Four: Continue to manually sign an APK if you’d like it generated and signed with your new key, or cancel if you do not want to sign an APK.

I hope this helps you out. 😊

You can checkout this story for more information regarding how you can correctly and efficiently deploy your Android App to play store using your Google Play Developer account


Moringa Core 5 Graduation

Published by Nancy Momanyi,

Moringa School Staff


Figuring out what you want to do in life is not always easy. There are some people who know exactly what they want to do from a very young age but that was not the case for 26 year old John Mutavi who is the class rep of Moringa Core 5. Before joining Moringa School he was in law school and then he joined accountancy. Becoming a Web Developer is not something he had ever considered. I always thought to become a programmer you need to have done a degree in computer science or be a geeky introvert who spend time alone typing commands on a computer, he says. He is the exact opposite so at first he never thought that he would make it to the last day. He feels that he has made a lot of progress since he started out in August last year.

Most women normally shy away from tech related careers but this is not the case with Virginia Ndung’u who is one of the most active members of her class. She is one of the three girls who will be graduating from her class. She is grateful that Moringa School has exposed her to several Women in Tech networks from the monthly meet ups that are organized by the school. She believes that anyone can learn how code and wants to be an ambassador of more Women in Tech movements. Naturally women are creative thinkers which is a skill that is required in the tech industry, she says. She is glad that she came to Moringa School.

Virginia Ndungu in the middle with her classmates Carol (on the left) and Mweru

Gitu Mbugua who joined the program immediately after high school has always wanted to be a Software Developer for as long as he can remember. He has been a tech enthusiast since he was in high school. When he finished he tried learning how to code using online resources but he hit a lot of blockers. He needed a community of developers. He searched for coding boot camps in Kenya and came across Moringa School. He admits that joining Moringa School is the best decision he has ever made.

Gitu Mbugua and John Mutavi

Andrew Anampiu who is the technical mentor of the class says that he has seen a lot of growth in his students since the program started. He particularly loves that they have learnt how to pitch their ideas in front of a panel. Other than having technical competence it is also an important skill for programmers to know how to work in a team and present their ideas. Most tech companies are searching for developers with all rounded soft skills and he believes his class is ready to join the tech industry.







Moringa School partners with MEST to expand across Africa


By Nancy Momanyi,

Moringa School Staff.


Since it was founded in April 2014 Moringa School has been the leading learning accelerator seeking to provide its students with both digital and professional skills training. Audrey Cheng who is the founder and CEO of Moringa School noticed that there was a skills gap among the Kenyan youth. She previously worked at Savannah fund which is a seed capital fund specializing in investments in early stage,high growth technology startups in Sub Saharan Africa. While at Savannah fund she realized that finding suitable candidates to hire would take at least 6 months. She wanted to solve the skills gap in Kenya and Africa as a whole.

Moringa School is partnering with MEST to expand to other parts of Africa. It is currently based in Nairobi, Kenya. The partnership with MEST was initiated in September when Moringa School had its first Ghana class. Moringa School plans to launch in Capetown on February 12th 2018. The second Ghana will also kick off on the same date. 

The Meltwater Entrepreneurial School of Technology (MEST) and MEST Incubator provide training, seed investment and mentor ship for the next generation of globally successful African software enterprises. The partnership with Moringa School to offer the 20 week programming and professional development course is aimed at graduating students with software development skills to bridge the skills gap in Africa.

Moringa School is divided into two main programs, Moringa Prep and Moringa Core. Moringa Prep is a five week introductory course which covers the fundamentals of programming like HTML, CSS and JavaScript. Moringa Core is a more immersive program which takes fifteen weeks. This is where the students learn how to build entire websites and mobile applications on their own. Once a student has successfully finished the Moringa Prep program they have the option of either joining Full stack web development or Android Development.




By Kepha Okari.

Moringa School Student



Imagine reading your favorite book and a text comes in from your washing machine informing you that it’s done with your laundry and you need to dry them, or a message from the hydro sensors in your pot reminding you to water your plant. Better yet, a reminder from your fridge about the refreshments you need to buy whenever pass near a convenient store. How cool and convenient is that? The very concept of interconnecting appliances and accessories around our lives is what we call ‘Internet of things’. The key idea is to minimize human and computer direct interaction by enabling the devices to gather data from our environment on their own, interpret and act on it or advice us appropriately.

Like the two sides of a coin, IoT  comes with its own benefits that are so hard to resist and inevitable challenges. Much of the questions that arise about  our readiness for IoT have to do with the technical aspects. Any day any time, we will all be ready for the positive impacts of anything that there is to think about. I can’t quite say that regarding the probable  IoT challenges. This is so because all the stakeholders seem to direct their focus on the basic benefits of IoT but have taken  a backseat on solving the challenges it presents. We will never question our readiness for this piece of technology until we take our time to evaluate these existing challenges

Notably, the cost of implementing this piece of technology will not be any forgiving due to the infrastructure required to support it. However, this should be the least of our worries as there are always people willing to invest in innovations should they foresee an economic bubble attached to it. The technical challenges remain the real elephant in the room.

The first concern is security. We all want  to secure our personal  information from getting in the hands of bad people. But not all of the users have the technical know-hows to ensure this happens. Came to think of it, with  the large numbers of devices connected to the Internet, their will be a lot of information in the offing  and businesses will be yearning for it to optimize their marketing. There are those who will do about anything to avail this information to some of these corporates who are willing to play dirty. Also, there will always be those crazy hackers who will see this as an opportunity to take there mischievous a notch higher. With ten or so devices linked to one user, it becomes difficult to store passwords for each. As such, most users will likely use one password for all the devices or their email (or even worse, their social media account) to login. Unfortunately, this will widen the avenue of leaking their sensitive information. How secure a user can be depends on the security state of their least secured device. If the ‘right kind of hackers’ get this access, God knows what they can do.

Reliability is another concern. Owing to the dependence that will be attached to this kind of technology, any failure of servers will be felt to the core. We first need to ensure resilience in case that happens. Until then, I doubt our preparedness. Also, there will be so many devices to connect to the internet, it will be a real challenge allocating each an Internet Protocol address. An IP is the unique identification allocated to every device connected on the internet. It enables the device to send and receive information over the Internet. Much like a phone number is assigned to each phone in the cellular network for communication with other phones.I believe going forward, there is a high possibility of exhausting the available IP resources availed by IP version 6 (IPv6), which many believe is the ultimate IP addressing solution. Very few imagined IPv4 would be exhausted until the internet adoption proved them wrong. We will need a much more scalable IP addressing system. Otherwise, sticking to IPv6 as our silver bullet for this will be like fighting obesity by adjusting a belt.

We cannot also hide away from the environmental implications that IoT will present. IoT will peg its success on cloud computing which in turn will require millions of data centers to host the chunks of data generated by the users. We will need a lot of electricity to keep these facilities running. Currently, a research by Molecular Diversity Preservation International and Multidisciplinary Digital Publishing Institute (MDPI) estimates that they take 9% of the global electricity and generate 2% of carbon emission. If IoT adoption rockets before we find renewable energy sources that are more practical and scalable, this figures will get even more scary. Holding this challenges in mind, do you think we ready for the Internet of Things?


The Evolution of Cryptocurrency

By Newton Bii,

Moringa Core 6 Student.

I once heard from a reliable source, sort of, that one Bitcoin was worth around Ksh. 100,000!
Imagine with a single ‘coin’, I could buy me a motorbike and harass Nairobi motorists with my blatant and obvious disregard for traffic rules. Yeah, one ‘coin’ worth a hundred grand? Impossible!

Well, as I write this, one Bitcoin is worth Ksh. 1,500,000. As it turns out,my ‘reliable source’ was onto something.
To put it in perspective an ounce of gold at the current market price is just short of Ksh.200,000.
So what is it? Is it a gold coin?, Is it some sort of rare mineral? Well, I’m glad you asked.

Bitcoin is type of cryptocurrency. According to a source on the inter-webs, it is a type
of digital currency that uses cryptography for security. This makes it virtually Impossible to counterfeit.It is also not issued by any central authority, rendering it theoretically immune to government interference or manipulation.

It’s transactions are anonymous making it very valuable. At the moment there are over one thousand types of Cryptocurrencies available since the invent of Bitcoin and since it was the first, it is by market capitalization the largest blockchain network. It was launched in 2009 by an individual or a group called Satoshi Nakamoto (no one knows their true identity). As of 2015, there were over 14.6 million Bitcoins in circulation
with a market value of over 3 billion US dollars.

So how does it work exactly?
It is almost similar to stock exchange where ‘Bitcoin exchanges’ such as Coinbase and Bitstamp allow people to buy or sell Bitcoins using different currencies. People can also transfer Bitcoins to each other just like sending money digitally.
Another way to acquire Bitcoins is through ‘mining’. Just like mining, ‘mining’ of Bitcoins involves cracking and solving complex math puzzles. A winner a the moment is awarded 12.5 Bitcoins, that’s around 18 million Kenyan Shillings!
Bitcoins are stored in digital ‘wallets’ which a user can choose to locate in in a cloud or on a local storage such as PCs and phones. This is Bitcoins version of a digital bank where one can send or receive Bitcoins, pay for goods and services or save.

As valuable and attractive as this is, there are a lot of cons. The anonymity and the untracked nature of transactions makes it attractive to money laundering and illegal transactions. The exchanges although secure, are also vulnerable to hacking.

Some people think Cryptocurrencies are a sham, at the other end, ‘first responders’ are making a fortune. According to me, this is definitely worth a try if you have some money lying around. Since I do not have that privilege, I’ll take my chances with the math puzzles. Who knows, I might just be writing my next piece on a cruise ship.

World Bank Women’s Bootcamp launch

By Nancy Momanyi,

Moringa School Staff

Women's boot camp.jpg


We are excited to announce that the start of Moringa School’s first ever Women’s Boot camp in partnership with the World Bank.

Classes began on November 22nd at Moringa’s Nairobi campus. Our new students are excited to join the class. The five week intensive program will enable them to access world class coding content, curated and created by Moringa School in an innovative blended learning environment.

In the first 5 weeks of the program, students will focus on making sure that world-class knowledge in programming translates into real-world skills by enabling our students to learn through practice – by actually doing.

In January, a select number will move on to Moringa Core, where they will specialize in Full- stack development paired with soft skills matched to current employer needs. At the end of the 15-week course, our students will then participate in our job placement program.

24 of the students in the new class are women, and 95% of our students find employment. Our aim is to create equality among our students. We hope that with the 50% subsidy on this program, we can increase the number of women graduating and place them in an industry where they can not only empower themselves but inspire the change towards inclusivity that this industry so desperately needs.

To apply to the Moringa Women’s Boot Camp starting on February 5th, click here

Moringa Prep 6 Graduation

By Robert Edward.

Moringa Core 6 StudentMoringa Prep Graduation

The very first time I heard of Moringa School was from a friend of mine who recommended it to me after seeing my immense thirst in Web development and technology at large. So I immediately went online and booked an interview to reserve my spot at this prestigious boot camp.

My very first day in Moringa was quite astonishing to me since was met with the reality of a flipped classroom, which was something quite different from the everyday norm in other schools, but I quickly adapted to this system and actually found it quite effective since you controlled your own pace of learning, understanding and putting into practice new concepts. Plus we had Technical Mentors that would help you navigate through a bind with ease. I personally had quite a few blockers initially but with time and constant trial and error I was able to smash through them.

I found the general environment in Moringa very positive since I made really good friends, got to meet a lot of influential people that always had a lesson or two to teach on the journey to becoming an effective developer, and the yoga session really helped me calm both body and mind after a tiresome week staring at computer screens for the better part of the day.

I really enjoyed the Moringa Prep Experience and looking back at what I could do the first week, which was not that good and the much I’ve grown in just five weeks is quite a sight for sore eyes. I can’t wait to join the Moringa- Core program come next year January to continue this challenging yet adventurous journey.