Deploying BadgeYaY with Docker on Docker Cloud

We already have a Dockerfile present in the repository but  there is problem in many lines of code.I studied about Docker and learned how It is deployed and I am now going to explain how I deployed BadgeYaY on Docker Cloud.

To make deploying of Badgeyay easier we are now supporting Docker based installation.

Before we start to deploy, let’s have a quick brief about what is docker and how it works ?

What is Docker ?

Docker is an open-source technology that allows you create, deploy, and run applications using containers. Docker allows you deploy technologies with many underlying components that must be installed and configured in a single, containerized instance.Docker makes it easier to create and deploy applications in an isolated environment.

Now, let’s start with how to deploy on docker cloud:

Step 1 – Installing Docker

Get the latest version of docker. See the offical site for installation info for your platform.

Step 2 – Create Dockerfile

With Docker, we can just grab a portable Python runtime as an image, no installation necessary. Then, our build can include the base Python image right alongside our app code, ensuring that our app, its dependencies, and the runtime, all travel together.

These portable images are defined by something called a Dockerfile.

In DockerFile, there are all the commands a user could call on the command line to assemble an image. Here’s is the Dockerfile of BadgeYaY.

# The FROM instruction initializes a new build stage and sets the Base Image for subsequent instructions.
FROM python:3.6

# We copy just the requirements.txt first to leverage Docker cache
COPY ./app/requirements.txt /app/


# The WORKDIR instruction sets the working directory for any RUN, CMD, ENTRYPOINT, COPY and ADD instructions that follow it in the Dockerfile.
WORKDIR /app


# The RUN instruction will execute any commands in a new layer on top of the current image and commit the results.
RUN pip install -r requirements.txt


# The COPY instruction copies new files.
COPY . /app


# An ENTRYPOINT allows you to configure a container that will run as an executable.
ENTRYPOINT [ "python" ]

# The main purpose of a CMD is to provide defaults for an executing container.
CMD [ "main.py" ]

 

Step 3 – Build New Docker Image

sudo docker build -t badgeyay:latest .

 

When the command completed successfully, we can check the new image with the docker command below:

     sudo docker images

 

Step 4 – Run the app

Let’s run the app in the background, in detached mode:

 sudo docker run -d -p 5000:5000 badgeyay

 

We get the long container ID for our app and then are kicked back to our terminal.Our container is running in the background.Now use docker container stop to end the process, using the CONTAINER ID, like so :

 

docker container stop 1fa4ab2cf395

 

Step 5 – Publish the app.

Log in to the Docker public registry on your local machine.

docker login

 

Upload your tagged image to the repository:

docker push username/repository:tag

 

From now on, we can use docker run and run our app on any machine. No matter where docker run executes, it pulls your image, along with Python and all the dependencies from requirements.txt, and runs your code. It all travels together in a neat little package, and the host machine doesn’t have to install anything but Docker to run it.

Docker Cloud

Docker Cloud provides a hosted registry service with build and testing facilities for Dockerized application images; tools to help you set up and manage host infrastructure; and application lifecycle features to automate deploying (and redeploying) services created from images.

In BadgeYaY, we  also have a Deploy button button which directly deploys on Docker cloud with a single click .

The related PR of this work is https://github.com/fossasia/badgeyay/pull/401 .

Resources :

  • Docker documentation: Link
  • Get Started With Docker: Link
Continue Reading Deploying BadgeYaY with Docker on Docker Cloud

Setting up Codecov in Badgeyay

 

BadgeYaY already has Travis CI and Codacy to test code quality and Pull Request but there was no support for testing Code Coverage in repository against every Pull Request. So I decided to go with setting up Codecov to test the code coverage.

In this blog post, I’ll be discussing how I have set up codecov in BadgeYaY in my Pull Request.

First, let’s understand what is codecov and why do we need it. For that we have to first understand what is code coverage then we will move on to how to add Codecov with help of Travis CI .

Let’s get started and understand it step by step.

What is Code Coverage ?

Code coverage is a measurement used to express which lines of code were executed by a test suite. We use three primary terms to describe each lines executed.

  • hit indicates that the source code was executed by the test suite.
  • partial indicates that the source code was not fully executed by the test suite; there are remaining branches that were not executed.
  • miss indicates that the source code was not executed by the test suite.

Coverage is the ratio of hits / (hit + partial + miss). A code base that has 5 lines executed by tests out of 12 total lines will receive a coverage ratio of 41% . In BadgeYaY , Code Coverage is 100%.

How CodeCov helps in Code Coverage ?

Codecov focuses on integration and promoting healthy pull requests. Codecov delivers <<<or “injects”>>> coverage metrics directly into the modern workflow to promote more code coverage, especially in pull requests where new features and bug fixes commonly occur.

I am listing down top 5 Codecov Features:

We can change the configuration of how Codecov processes reports and expresses coverage information. Let’s see how we configure it according to BadgeYaY by integrating it with Travis CI.

Now generally, the codecov works better with Travis CI. With the one line

 bash <(curl -s https://codecov.io/bash)

 

the code coverage can now be easily reported.

Add a script for testing:

"scripts": {
   - nosetests app/tests/test.py -v --with-coverage
}

Here is a particular example of travis.yml from the project repository of BadgeYaY:

Script:
- python app/main.py >> log.txt 2>&1  &
- nosetts app/tests/test.py -v --with-coverage
- python3 -m pyflakes

after_success:
- bash <(curl -s https://codecov.io/bash)

 

Let’s have a look at Codecov.yml to check exact configuration that I have used for BadgeYaY.

Codecov:
  # yes: will delay sending notifications until all ci is finished
  notify:
    require_ci_to_pass: yes

coverage:
  # how many decimal places to display in the UI: 0 <= value <= 4
  precision: 2
  # how coverage is rounded: down/up/nearest
  round: down 
  # custom range of coverage colors from red -> yellow -> green 
  range: "70...100"

  status:
     # measuring the overall project coverage
    project: yes
     # pull requests only: this commit status will measure the
       entire pull requests Coverage Diff. Checking if the lines
       adjusted are covered at least X%.
    patch: yes
     # if there are any unexpected changes in coverage
    changes: no

Comment:

  layout: "reach, diff, flags, files, footer"
  behavior: default
  require_changes: no

 

Now when anyone makes a Pull Request to BadgeYaY, Codecov will analyze the Pull Request according to above configuration and generate a Report showing the code coverage of that Pull Request.

 

Below is the screenshot of all test passing in BadgeYaY repository

This is how we setup codecov in BadgeYaY repository. And like this way, it can be set up in other repositories as well.

The related PR of this work is https://github.com/fossasia/badgeyay/pull/400

Resources :

  • CodeCov Documentation – Link
Continue Reading Setting up Codecov in Badgeyay

FOSSASIA Summit 2018 Highlights

The schedule for the FOSSASIA Summit is out. Our four-day open tech event starts on Thursday, March 22 with a grand opening of the exhibition at 12:00 PM and the conference at 1:00 PM in the Lifelong Learning Institute.

Developers, engineers and business representatives from FOSS projects and companies are joining the event. Thank you to Google Cloud, Daimler, Indeed, Microsoft, JPMorgan and the many partners and supporters for helping us to make the summit possible!

As a reader of FOSSASIA news you get a 15% discount on your ticket if you book before March 14 (after that 10%) with this link.

Here are some highlights of the event and a glance at participating FOSS projects, organizations and companies.

Highlights of the FOSSASIA Summit 2018

  • 200+ Tech Speakers in 12 Tracks are confirmed. Learn about latest technologies and Open Source business models in the Blockchain track, find out how to analyze data more efficiently in the Artificial Intelligence track or see how to deploy solutions with Kubernetes in the Cloud from engineers at leading cloud providers.
  • Executive Keynotes about “Daimler’s Open Source Strategy”, and “Machine Learning with TensorFlow and Cloud ML”
  • Leadership Panels about “AI, Machine Learning, Cloud, and the Conversational Web: Where is it all going?”, “Making Money with FOSS” and “Open Source Education”
  • The Exhibition and Career Fair runs from Thursday (March 22) till Saturday (March 24) with more than 50 company and project booths, where you can learn about technologies, job opportunities and participate in hands-on labs. Free hall passes are available until March 14.
  • The UNESCO Open Science and Open Data Hackathon takes place on Saturday and Sunday (March 24/25). Tickets and registration are free. Awesome prizes are waiting for the winners.
  • We put together a Cloud Training Day for Business Professionals in cooperation with Google. Apply for your spot here.
  • At the Young Developers Day on Saturday (March 24) there are many hands-on workshops in the exhibition hall, where participants of any age can build their own hardware and experiment with our Pocket Science Lab.
  • Vast variety of Deep Tech Sessions in tracks such as Artificial Intelligence,  Cloud, Container, DevOps, Blockchain, Cybersecurity, Web and Mobile, Open Design, IoT, Hardware, Imaging, Kernel & Platform,  Science Tech and Education and more.

FOSS Organizations at the FOSSASIA Summit

Speakers at the event come from amazing Free/Open Source organizations and projects like Debian, CentOS, FreeBSD, Videolan/VLC, Linux Foundation, Open Source Initiative, Python Software Foundation, Wikimedia, KDE, Apache Software Foundation, Open Source Design, Drupal, OpenTech, Ethical Hacking Club, Pocket Science Lab, Oman FOSS Initiative, LikeCoin Foundation and many more.

Companies at the FOSSASIA Summit

Tech Companies present at the event are Daimler/Mercedes, Google, Microsoft, Samsung, Singapore Press Holding, J.P. Morgan, Indeed, UNESCO, Oracle/MySQL, Gandi.net, Lazada, Viseo, Grab, SUSI.AI, BareOS, Platform.sh, Ulicious, SAP, Thoughtworks, Autodesk, KPMG, VMWare, Lionsforge, Fujitsu, Zendesk, McKinsey, Iomedia, IBM, Collabora, Manulife, Tata Consultancy Services and many startups like KyberNetwork, DataKind, Ethereum, Kamailio, Go-Jek, Canaan, StopStalk, ConsenSys, Chibitronics, Status.im, Attores and many others.

Continue Reading FOSSASIA Summit 2018 Highlights

UNESCO Hackathon at FOSSASIA Summit in Singapore

Join the UNESCO Open Data Hackathon at the FOSSASIA Summit, create open source apps and games that tackle climate change, environment and sustainable development challenges, and win awesome prizes! The hackathon takes place from Saturday 24 March to Sunday 25 March 2018 at the Lifelong Learning Institute in Singapore.

We are specifically interested in applications and games that set an example for others who could replicate solutions in other countries, and in particular in the Mekong countries, to tackle the sustainable development challenges. It is our goal to engage the developer community to develop innovative applications in open source by leveraging the open data and knowledge available.

We are inviting developers, designers, open source contributors, bloggers, journalists and all FOSSASIA community members to be part of the UNESCO Hackathon. We are especially encouraging applications from the Mekong region to join the contest. The hackathon is open for all and awesome prizes are waiting for you!

For participants from outside of Singapore we have the possibility to host them in a Singapore hostel. Please apply here. The number is limited. UNESCO encourages the application of women and girls.

How do I sign up?

1. Get your ticket to the Event on eventyay.com.

2. Sign up on Devpost.

3. Join the Gitter channel at https://gitter.im/fossasia/hackathon (requires login with Github).

4. Find team members and create your team preferably at least 3 members and maximum 5 contributors. You are also welcome to sign up and then wait until the Presentation of Ideas on Saturday before deciding to join a team, however we’d encourage you to form/join a team in advance if you already have an idea that you’d like to work on.

5. Join the event at the Lifelong Learning Institute on Saturday, March 24 at the opening at 2.00 pm until 10.00 pm and on Sunday, March 25 from 9.00 am until 5.00 pm.

Visit the website at unesco.sciencehack.asia and stay connected, join the event on Facebook and Meetup and follow FOSSASIA on Twitter.

UNESCO Hackathon Schedule

Hackathon Opening: March 24, 2018

12.00 Registration Opens
14:00 Opening
14.10 Intro of Background, Rules and Prizes
14:20 Presentation of Ideas, Teams and Team Building Activities
15:00 Begin of Hacking Activities
19.30 Dinner
22:00 Closing of Space

Hackday: March 25, 2018

08:00 – 09:00 Breakfast
09:00 – 13:00 Hack Activities Continue
13:00 – 13:30 Lunch
13:30 – 15:00 Hacking Continues
14:00 Submission Form Closes
15:15 – 16:00 Presentation of Outcome
16:00 Judges Withdraw for Consultation
16:30 Award Announcement and Ceremony
17:00 Summit Closing

Location/Venue

Lifelong Learning Institute

Address: 11 Eunos Road 8, Singapore 408601

Prizes

Prizes are awarded for three teams, and each team prize with a value of 1000 SGD. Win cool gear, hardware, raspis, Arduinos and more!

Project Submission Requirements

For the expected outcome of the hack, the applications or games shall be open source and use open data to tackle the climate change, environment and sustainable development challenges.

They shall address one or several of the following requirements:

  1. Respond to pressing environmental challenges at local, national or regional levels in Asia

  2. Enable the visualization of data in an innovative and/or easy-to-understand way

  3. Mobilize and create engagement of variety of stakeholders and sectors in society on climate change, environment and sustainable development

  4. Gender-sensitive prototype, recognizing or encouraging women’s participation in sustainable development

Functioning App

An important point is, is the prototype or showcase functioning? We prefer real code and design implementations over mockups.

What to enter

Please submit a link to the app, a Github repo link and a short presentation as a download or on Google drive (ensure it is set to public sharing). You can also share anything else to demonstrate your work and let us test it.

  • Video: The platform accepts links to YouTube, Vimeo or Youku. If you like you can post a short video to demonstrate your work.

  • File Upload: There is also an option to upload a file. The platform allows submitters to upload one file, though they can combine files into a single ZIP file.

  • Other: The platform requires contestants to enter an entry name and description. Please also accept the the conditions of the contest including sharing your work under certified Open Source license.

Platform

Share information about what operating systems or devices can your hack run on.

Ressources

Include information about API, SDK, or data set, that are required to run the app.

New vs. Existing

Any work done need to be new for the competition. Existing apps are not eligible. However the specific details what is acceptable and what is not will be determined by the jury. For example existing apps that have been modified substantially and include entirely new functionality would still be eligible.

Submission Rights & Display

The submissions should be Open Source and licensed under a compliant Open Source/Free Software license. They should be upload to a Github repository.

We also request the right to use the winners’ names and work to promote the competition and hackathons in future.

Links

UNESCO Hackathon: https://unesco.sciencehack.asia

FOSSASIA Summit: https://2018.fossasia.org

Tickets: https://eventyay.com/e/db15e7db/

Project Signup: https://fossasia-unesco.devpost.com

Facebook: https://www.facebook.com/events/139329623548116/

Meetup: https://www.meetup.com/FOSSASIA-Singapore-Open-Technology-Meetup/events/247899257/

FOSSASIA: https://twitter.com/fossasia

List of Open Data Resources in Asia

Data portals across Asia: http://dataportals.org
China: http://opendatachina.com
Singapore http://data.gov.sg
Indonesia: https://petabencana.id/map/jakarta
Cambodia: https://opendevelopmentcambodia.net
Thailand https://data.go.th, http://catalog.opendata.in.th
Vietnam: https://vietnam.opendevelopmentmekong.net/data/
World Bank: https://data.worldbank.org
India http://data.gov.in

Continue Reading UNESCO Hackathon at FOSSASIA Summit in Singapore

Participate in the #OpenTechNights Program today and Win a Free Stay during the FOSSASIA Summit 2018 from the Open Source Initiative and UNESCO

The FOSSASIA Summit 2018 takes place in Singapore from Thursday, March 22 – Sunday, March 25. Open Source contributors can now apply for a free ticket to the event, and accommodation throughout the conference. In addition, you’ll be eligible to participate in: Featured cloud workshops, the UNESCO hackathon, and celebrate the 20th Anniversary of the Open Source Initiative. All you have to do is convince us, that you are an awesome Open Source contributor and book your trip to Singapore!

About #OpenTechNights

Developers from all over the world are joining the FOSSASIA Summit. We want to connect established and new Open Tech contributors alike. With the support of UNESCO, the Open Source Initiative, and other partners, we are inviting Free and Open Source Software contributors to join us. Winners will receive free lodging at a shared accommodation in the centre of Singapore, and a free ticket to the conference.

Winners are expected to join the summit each day, to participate in the workshops, and the Hackathon on Saturday/Sunday, March 24/25. We would also hope you can support the Open Source Initiative at their booth.

How do I sign up?

Step 1: Please fill in our form here before February 28, 2018.

Step 2: We will notify all winners within three days of their submission, however judging will begin immediately, and continue until all open spots are filled, so the earlier you apply, the higher your chances to win. Please note, winners will receive free accommodations in Singapore. Flight and other travel costs are not included and are the responsibility of the attendee.

Step 3: Selected applicants must confirm their itinerary and tickets before March 1st to insure their free stay in Singapore. Earliest check-in possible is Wednesday March 21, latest check-out is Monday, March 26. Please indicate your arrival and departure times in the application form.

Expectations of Participants – Share what you learn

  1. Attendees support volunteers, speakers and participants at the event, and take a shift at the Open Source Initiative’s booth. Let’s bring the spirit of sharing Open Technologies and learning together!
  2. Please confirm your participation at the opening event at 12PM, Thursday, March 22, 2018 and participate in the specially featured cloud workshops on Friday, March 23, 2018 from 9.00 AM – 5.00PM.
  3. Attendees participate in the UNESCO Hackathon on Saturday, March 24 (2.00 PM – 10.00PM) and on Sunday, March 25 (9.00 AM – 5.00PM).
  4. Attendees help reach out to community members who cannot join us at the event, make tweets, share what you learn on social media, publish photos and put up blog post about the summit.

Apply Now

Apply for a free stay with #FOSSASIA #OpenTechNights supported by the Open Source Initiative and the UNESCO and participate in the FOSSASIA Summit 2018 now here!

More Information

More updates, tickets and information on speakers on our website: https://2018.fossasia.org

Links

Open Source Initiative: https://opensource.org

UNESCO: http://unesco.org

Continue Reading Participate in the #OpenTechNights Program today and Win a Free Stay during the FOSSASIA Summit 2018 from the Open Source Initiative and UNESCO

Enhancing Rotation in Phimp.me using Horizontal Wheel View

Installation

To implement rotation of an image in Phimp.me,  we have implemented Horizontal Wheel View feature. It is a custom view for user input that models horizontal wheel controller. How did we include this feature using jitpack.io?

Step 1: 

The jitpack.io repository has to be added to the root build.gradle:

allprojects {
repositories {
jcenter()
maven { url "https://jitpack.io" }
}
}


Then, add the dependency to your module build.gradle:

compile 'com.github.shchurov:horizontalwheelview:0.9.5'


Sync the Gradle files to complete the installation.

Step 2: Setting Up the Layout

Horizontal Wheel View has to be added to the XML layout file as shown below:

<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2">

<com.github.shchurov.horizontalwheelview.HorizontalWheelView
android:id="@+id/horizontalWheelView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toStartOf="@+id/rotate_apply"
android:padding="5dp"
app:activeColor="@color/accent_green"
app:normalColor="@color/black" />

</FrameLayout>


It has to be wrapped inside a Frame Layout to give weight to the view.
To display the angle by which the image has been rotated, a simple text view has to be added just above it.

<TextView
android:id="@+id/tvAngle"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_gravity="center"
android:layout_weight="1"
android:gravity="center"
android:textColor="@color/black"
android:textSize="14sp" />

Step 3: Updating the UI

First, declare and initialise objects of HorizontalWheelView and TextView.

HorizontalWheelView horizontalWheelView = (HorizontalWheelView) findViewById(R.id.horizontalWheelView);
TextView tvAngle= (TextView) findViewById(R.id.tvAngle);

 

Second, set up listener on the HorizontalWheelView and update the UI accordingly.

horizontalWheelView.setListener(new HorizontalWheelView.Listener() {
@Override
public void onRotationChanged(double radians) {
updateText();
updateImage();
}
});


updateText()
updates the angle and updateImage() updates the image to be rotated. The following functions have been defined below:

private void updateText() {
String text = String.format(Locale.US, "%.0f°", horizontalWheelView.getDegreesAngle());
tvAngle.setText(text);
}

private void updateImage() {
int angle = (int) horizontalWheelView.getDegreesAngle();
//Code to rotate the image using the variable 'angle'
rotatePanel.rotateImage(angle);
}


rotateImage()
is a method of ‘rotatePanel’ which is an object of RotateImageView, a custom view to rotate the image.

Let us have a look at some part of the code inside RotateImageView.

private int rotateAngle;


‘rotateAngle’ is a global variable to hold the angle by which image has to be rotated.

public void rotateImage(int angle) {
rotateAngle = angle;
this.invalidate();
}


The method invalidate() is used to trigger UI refresh and every time UI is refreshed, the draw() method is called.
We have to override the draw() method and write the main code to rotate the image in it.

The draw() method is defined below:

@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (bitmap == null)
return;
maxRect.set(0, 0, getWidth(), getHeight());// The maximum bounding rectangle

calculateWrapBox();
scale = 1;
if (wrapRect.width() > getWidth()) {
scale = getWidth() / wrapRect.width();
}

canvas.save();
canvas.scale(scale, scale, canvas.getWidth() >> 1,
canvas.getHeight() >> 1);
canvas.drawRect(wrapRect, bottomPaint);
canvas.rotate(rotateAngle, canvas.getWidth() >> 1,
canvas.getHeight() >> 1);
canvas.drawBitmap(bitmap, srcRect, dstRect, null);
canvas.restore();
}

private void calculateWrapBox() {
wrapRect.set(dstRect);
matrix.reset(); // Reset matrix is ​​a unit matrix
int centerX = getWidth() >> 1;
int centerY = getHeight() >> 1;
matrix.postRotate(rotateAngle, centerX, centerY); // After the rotation angle
matrix.mapRect(wrapRect);
}

 

And here you go:

Resources

Refer to Github- Horizontal Wheel View for more functions and for a sample application.

Continue Reading Enhancing Rotation in Phimp.me using Horizontal Wheel View
FOSSASIA Summit 2018 Singapore – Call for Speakers
Too big Crowd for only One Photo / One of Many Group Photos by Michael Cannon

FOSSASIA Summit 2018 Singapore – Call for Speakers

The FOSSASIA Open Tech Summit is Asia’s leading Open Technology conference for developers, companies, and IT professionals. The event will take place from Thursday, 22nd – Sunday, 25th March at the Lifelong Learning Institute in Singapore.

During four days developers, technologists, scientists, and entrepreneurs convene to collaborate, share information and learn about the latest in open technologies, including Artificial Intelligence software, DevOps, Cloud Computing, Linux, Science, Hardware and more. The theme of this year’s event is “Towards the Open Conversational Web“.

For our feature event we are looking for speaker submissions about Open Source for the following areas:

  • Artificial Intelligence, Algorithms, Search Engines, Cognitive Experts
  • Open Design, Hardware, Imaging
  • Science, Tech and Education
  • Kernel and Platform
  • Database
  • Cloud, Container, DevOps
  • Internet Society and Community
  • Open Event Solutions
  • Security and Privacy
  • Open Source in Business
  • Blockchain

There will be special events celebrating the 20th anniversary of the Open Source Initiative and its impact in Open Source business. An exhibition space is available for company and project stands.

Submission Guidelines

Please propose your session as early as possible and include a description of your session proposal that is as complete as possible. The description is of particular importance for the selection. Once accepted, speakers will receive a code for a speakers ticket. Speakers will receive a free speakers ticket and two standard tickets for their partner or friends. Sessions are accepted on an ongoing basis.

Submission Link: 2018.fossasia.org/speaker-registration

Dates & Deadlines

Please send us your proposal as soon as possible via the FOSSASIA Summit speaker registration.

Deadline for submissions: December 27th, 2017

Late submissions: Later submissions are possible, but early submissions have priority

Notification of acceptance: On an ongoing basis

Schedule Announced: January 20, 2018

FOSSASIA Open Tech Summit: March 22nd – 25th, 2018

Sessions and Tracks

Talks and Workshops

Talk slots are 20 minutes long plus 5-10 minutes for questions and answers. The idea is, that participants will use the sessions to get an idea of the work of others and are able to follow up in more detail in break-out areas, where they discuss more and start to work together. Speakers can also sign up for either a 1-hour long or a 2-hours workshop sessions. Longer sessions are possible in principle. Please tell us the proposed length of your session at the time of submission.

Lightning talks

You have some interesting ideas but do not want to submit a full talk? We suggest you go for a lightning talk which is a 5 minutes slot to present your idea or project. You are welcome to continue the discussion in breakout areas. There are tables and chairs to serve your get-togethers.

Stands and assemblies

We offer spaces in our exhibition area for companies, projects, installations, team gatherings and other fun activities. We are curious to know what you would like to make, bring or show. Please add details in the submission form.

Developer Rooms/Track Hosts

Get in touch early if you plan to organize a developer room at the event. FOSSASIA is also looking for team members who are interested to co-host and moderate tracks. Please sign up to become a host here.

Publication

Audio and video recordings of the lectures will be published in various formats under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. This license allows commercial use by media institutions as part of their reporting. If you do not wish for material from your lecture to be published or streamed, please let us know in your submission.

Sponsorship & Contact

If you would like to sponsor FOSSASIA or have any questions, please contact us via [email protected].

Suggested Topics

  • Artificial Intelligence (SUSI.AI, Algorithms, Cognitive Expert Systems AI on a Chip)
  • Hardware (Architectures, Maker Culture, Small Devices)
  • 20 years Impact of Open Source in Business
  • DevOps (Continuous Delivery, Lean IT, Moving at Cloud-speed)
  • Networking (Software Defined Networking, OpenFlow, Satellite Communication)
  • Security (Coding, Configuration, Testing, Malware)
  • Cloud & Microservices (Containers – Libraries, Runtimes, Composition; Kubernetes; Docker, Distributed Services)
  • Databases (Location-aware and Mapping, Replication and Clustering, Data Warehousing, NoSQL)
  • Science and Applications (Pocket Science Lab, Neurotech, Biohacking, Science Education)
  • Business Development (Open Source Business Models, Startups, Kickstarter Campaigns)
  • Internet of Everything (Smart Home, Medical Systems, Environmental Systems)
  • Internet Society and Culture (Collaborative Development, Community, Advocacy, Government, Governance, Legal)​
  • Kernel Development and Linux On The Desktop (Meilix, Light Linux systems, Custom Linux Generator)
  • Open Design and Libre Art (Open Source Design)
  • Open Event (Event Management systems, Ticketing solutions, Scheduling, Event File Formats)

Links

Speaker Registration and Proposal Submission:
2018.fossasia.org/speaker-registration

FOSSASIA Summit: 2018.fossasia.org

FOSSASIA Summit 2017: Event Wrap-Up

FOSSASIA Photos: flickr.com/photos/fossasia/

FOSSASIA Videos: Youtube FOSSASIA

FOSSASIA on Twitter: twitter.com/fossasia

Continue Reading FOSSASIA Summit 2018 Singapore – Call for Speakers

How to use Realm in SUSI Android to Save Data

Sometimes we need to store information on the device locally so that we can use information offline and also query data faster. Initially, SQLite was only option to store information on the device. But working with SQLite is difficult sometimes and also it makes code difficult to understand. Also, SQL queries take a long time. But now we have realm a better alternative of SQLite. The Realm is a lightweight mobile database and better substitute of SQLite. The Realm has own C++ core and store data in a universal, table-based format by a C++ core. This allows Realm to allow data access from multiple languages as well as a range of queries. In this blog post, I will show you why we used Realm and how we save data in SUSI Android using Realm.

“How about performance? Well, we’re glad you asked 🙂 For all the API goodness & development productivity we give you, we’re still up to 100x faster than some SQLite ORMs and on average ~10x faster than raw SQLite and common ORMs for typical operations.” (compare: https://blog.realm.io/realm-for-android/)

Advantages of Realm over SQLite are following:

  • It is faster than SQLite as explained on the Realm blog. One of the reasons realm is faster than SQLite is, the traditional SQLite + ORM abstraction is leaky because ORM simply converts  Objects and their methods into SQL statements. Realm, on the other hand, is an object database, meaning your objects directly reflect your database.
  • It is easier to use as it uses objects for storing data. When we use SQLite we need boilerplate code to convert values to and from the database, setting up mappings between classes and tables, fields and columns, foreign keys, etc. Whereas in Realm data is directly exposed as objects and can be queried without any conversion.

Prerequisites

To include this library in your project you need

  • Android studio version 1.5.1 or higher.
  • JDK version 7.0 or higher.
  • Android API level 9 or higher.

How to use realm in Android

To use Realm in your project we must add the dependency of the library in build.gradle(project) file 

 dependencies {
       classpath “io.realm:realm-gradle-plugin:3.3.1”
   }

and build.gradle(module) file.

apply plugin: realm-android
dependencies {
compile io.realm:android-adapters:1.3.0
}

Now you have to instantiate Realm in your application class. Setting a default configuration in your Application class, will ensure that it is available in the rest of your code.

RealmConfiguration realmConfiguration = new RealmConfiguration.Builder(this)
                                                              .deleteRealmIfMigrationNeeded().build();
Realm.setDefaultConfiguration(realmConfiguration);

Now we need to create a model class. A model class is use to save data in Realm and retrieve saved data and it must extend RealmObject class. For eg.

public class Person extends RealmObject {
   private String name;
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
}

Field in the model class uses to define columns. For eg. ‘name’ is a column name. Method like setName() use to save data  and getName() use to retrieve saved data.

Now create an instance of the Realm in the activity where you want to use it. It will be used to read data from the Realm and write data to the Realm.

Realm realm = Realm.getInstance(this);

Before you start a new transaction you must call beginTransaction(). It will open database.

realm.beginTransaction();

To write data to the Realm you need to create an instance of the model class. createObject used to create an instance of RealmObject class. Our model class is RealmObject type so we use createObject() to create an instance of the model class.

Person person = realm.createObject(Person.class);

Write data to realm.

person.setName(“MSDHONI”);

And after it you must call commitTransaction(). commitTransaction() use to end transaction.

realm.commitTransaction();

Reading data from Realm is easier than writing data to it. You need to create an instance of the Realm.

Realm realm = Realm.getInstance(this);

To create query use where the method and pass the class of object you want to query. After creating query you can fetch all data using findAll() method.

realm.where(Person.class).findAll();

Reference

Continue Reading How to use Realm in SUSI Android to Save Data

Using Universal Image Loader to Display Image on Phimpme Android Application

In Phimpme Android application we needed to load image on the sharing Activity fast so that there won’t be any delay that is visible by a user in the loading of any activity. We used Universal Image Loader to load the image on the sharing Activity to load Image faster.

Getting Universal Image Loader

To get Universal Image Loader in your application go to Gradle(app)-> and then add the following line of code inside dependencies:

dependencies{

compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.4'

}

Initialising Universal Image Loader and Displaying Image

To display image on using Universal Image Loader we need to convert the image into a URI from a file path:

saveFilePath = getIntent().getStringExtra(EXTRA_OUTPUT);
Uri uri = Uri.fromFile(new File(saveFilePath));

How an image should be displayed

We need to display the image in such a way that it covers the whole image view in the sharing Activity. The image should be zoomed out. The quality of the image should not be distorted or reduced. The image should look as it is. The image should be zoomable so that the user can pinch to zoom in and zoom out. For the image to adjust the whole Image View we set ImageScaleType.EXACTLY_STRETCHED. We will also set cacheInMemory to true and cacheOnDisc to true.  

private void initView() {
   saveFilePath = getIntent().getStringExtra(EXTRA_OUTPUT);
   Uri uri = Uri.fromFile(new File(saveFilePath));
   ImageLoader imageLoader = ((MyApplication)getApplicationContext()).getImageLoader();
   DisplayImageOptions options = new DisplayImageOptions.Builder()
           .cacheOnDisc(true)
           .imageScaleType(ImageScaleType.EXACTLY_STRETCHED)
           .cacheInMemory(true)
           .bitmapConfig(Bitmap.Config.RGB_565)
           .build();
   imageLoader.displayImage(uri.toString(), shareImage, options);
}

Image Loader function in MyApplication class:

private void initImageLoader() {
   File cacheDir = com.nostra13.universalimageloader.utils.StorageUtils.getCacheDirectory(this);
   int MAXMEMONRY = (int) (Runtime.getRuntime().maxMemory());
   // System.out.println("dsa-->"+MAXMEMONRY+"   "+(MAXMEMONRY/5));//.memoryCache(new
   // LruMemoryCache(50 * 1024 * 1024))
   DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
           .cacheInMemory(true)
           .cacheOnDisk(true)
           .build();

   ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
           this).memoryCacheExtraOptions(480, 800).defaultDisplayImageOptions(defaultOptions)
           .diskCacheExtraOptions(480, 800, null).threadPoolSize(3)
           .threadPriority(Thread.NORM_PRIORITY - 2)
           .tasksProcessingOrder(QueueProcessingType.FIFO)
           .denyCacheImageMultipleSizesInMemory()
           .memoryCache(new LruMemoryCache(MAXMEMONRY / 5))
           .diskCache(new UnlimitedDiskCache(cacheDir))
           .diskCacheFileNameGenerator(new HashCodeFileNameGenerator()) // default
           .imageDownloader(new BaseImageDownloader(this)) // default
           .imageDecoder(new BaseImageDecoder(false)) // default
           .defaultDisplayImageOptions(DisplayImageOptions.createSimple()).build();

   this.imageLoader = ImageLoader.getInstance();
   imageLoader.init(config);
}

Image View in Sharing Activity XML file:

In the Sharing Activity Xml resource, we need to specify the width of the image view and the height of the image view. In Phimpme Android application we are using ImageViewTouch so that we have features like touch to zoom in zoom out. The scale type of the imageView is centerCrop so that image which is loaded is zoomed out and focus is in the center of the image.  

<org.fossasia.phimpme.editor.view.imagezoom.ImageViewTouch
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:id="@+id/share_image"
   android:layout_below="@+id/toolbar"
   android:layout_weight="10"
   android:layout_alignParentStart="true"
   android:scaleType="centerCrop"/>

Conclusion

To load image faster on any ImageView we should use Universal Image Loader. It helps load the activity faster and allows many features as discussed in the blog.

 

Github

Resources

Continue Reading Using Universal Image Loader to Display Image on Phimpme Android Application

Implementation of Set Different Language for Query in SUSI Android

SUSI.AI has many skills. Some of which are displaying web search of a certain query, provide a list of relevant information of a topic, displaying a map of the certain position and simple text message of any query. Previously SUSI.AI reply all query in English language but now one important feature is added in SUSI.AI and that feature is, reply query of the user in the language that user wants. But to get the reply in different language user has to send language code of that language along with query to SUSI Server. In this blog post, I will show you how it is implemented in SUSI Android app.

Different language supported in SUSI Android

Currently, different languages added in option in SUSI Android and their language code are:

Language Language Code
English en
German de
Spanish es
French fr
Italian it
Default Default language of the device.

Layout design

I added an option for choosing the different language in settings. When the user clicks on Language option a dialog box pops up. I used listpreference to show the list of different languages.

<ListPreference

  android:title=“@string/Language”

  android:key=“Lang_Select”

  android:entries=“@array/languagentries”

  android:entryValues=“@array/languagentry”>

</ListPreference>

“title” is used to show the title of setting, “entries” is used to show the list of entry to the user and “entryValue” is the value corresponding to each entry. I used listpreference because it has own UI so we don‘t have to develop our own UI for it and also it stores the string into the SharedPreferences so we don’t need to manage the values in SharedPreference. SharedPreference needed to set value in Language in settings so that once user close app and again open it setting will show same value otherwise it will show default value. We used an array of string to show the list of languages.

<string-array name=“languagentries”>

  <item>Default</item>

  <item>English</item>

  <item>German</item>

  <item>Spanish</item>

  <item>French</item>

  <item>Italian</item>

</string-array>

SetLanguage implementation

To set language user must choose Language option in setting.

On clicking Language option a dialog box pop up with the list of different languages. When the user chooses a language then we save corresponding language code in preference with key “prefLanguage” so that we can use it later to send it to the server along with the query. It also uses to send language to the server to store user language on the server, so that user can use the same language in the different client.

querylanguage.setOnPreferenceChangeListener { _, newValue ->

  PrefManager.putString(Constant.LANGUAGE, newValue.toString())

  if(!settingsPresenter.getAnonymity()) {

      settingsPresenter.sendSetting(Constant.LANGUAGE, newValue.toString(), 1)

  }

}

newValue.toString() is the value i.e language code of corresponding language.

Now when we query anything from SUSI.AI we send language code along with query to the server. Default language is default language of the device. Before sending language to the server we check language is default language or any specific language.

val language = if (PrefManager.getString(Constant.LANGUAGE, Constant.DEFAULT).equals(Constant.DEFAULT))

Locale.getDefault().language

else PrefManager.getString(Constant.LANGUAGE, Constant.DEFAULT)

And after that, we send the corresponding language along with query to the server.

clientBuilder.susiApi.getSusiResponse(timezoneOffset, longitude, latitude, source, language, query)

Reference

Continue Reading Implementation of Set Different Language for Query in SUSI Android