About MDG

Mobile Development Group, IIT Roorkee, founded in 2010, is an active student group directing its efforts towards creating useful mobile applications and promoting tech-based learning for the same. We have people who are in various fields related to tech (primarily related to computer science and tech). These fields include Android/iOS/cross-platform App Development, Web Development, Machine Learning and Artificial Intelligence, we also have people who are into Computer Systems and Security.

How to start

There are many open source projects in our GitHub organisation (http://github.com/mdg-iitr/), anyone can start contributing by solving current issues or by working on the ideas in the Project Section.

• First…

A Fragment represents a behavior or a portion of user interface in an Activity. You can think of a fragment as a modular section of an activity, which has its own lifecycle, receives its own input events, and which you can add or remove while the activity is running (sort of like a “sub activity” that you can reuse in different activities).

Types Of Fragments

1. Static fragments are placed within an activity layout and never change.

<?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="match_parent"›      <fragment
          android:layout_width="wrap_content"
          android:layout_height="match_parent"
          android:id="@+id/fragment" />1  </LinearLayout>

1. Dynamic fragments are almost reconfigurable puzzle pieces. They have their own lifecycle, anatomy, classes…

This lecture introduces you to Retrofit, a REST Client for Android and Java by Square. It makes it relatively easy to retrieve and upload JSON (or other structured data) via a REST based webservice.

In Retrofit you configure which converter is used for the data serialization. Typically for JSON you use GSon, but you can add custom converters to process XML, or other protocols like Protocol Buffers. Retrofit uses the OkHttp library for HTTP requests.

Setup

In order to use retrofit in android, add the following dependency in your gradle.build file:

compile 'com.squareup.retrofit2:retrofit:2.1.0'

Also, add the following permission in your AndroidManifest.xml…

After successful recruitment drives for the past five years, we are back with Droid Wars for 2018. Droid Wars is a gateway for first yearites to be a part of an amazing learning and fun experience with MDG. Being a part of the group you will be in touch with like-minded people, who are mobile development enthusiasts as well as pursue other software development practices. For the last two years, we are conducting Droid Wars alongside Winter of Code to give you people a greater chance to be a part of MDG.

What is Droid Wars ?

It is a hackathon specially organized for first…

This class explains the basic tasks involved in connecting to the network, monitoring the network connection (including connection changes), and giving users control over an app’s network usage. It also describes how to parse and consume XML data.

Connecting to the Network

In order to perform network operations in your application, your manifest must include the following permissions:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Introducing Network Operations on a Separate Thread

To avoid creating an unresponsive UI, don’t perform network operations on the UI thread. By default, Android 3.0 …

Structure

What is a ViewGroup?

A viewgroup is a parent class of all the views. It holds all the children views (and viewgroups) within, as depicted by the structure above.

Types of ViewGroups

• Absolute Layout
• By using an Absolute Layout, you can specify the exact locations (x/y coordinates) of its children.
• They are less flexible and harder to maintain, rarely used nowadays.
• One needs to remember too many coordinate values for placing a view at a position, it would rather be much easier to remember a view with respect to which one needs to place a view on screen.

Usage

<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Button android:layout_width="100dp" android:layout_height="wrap_content"…

Made up of three parts kernel, shell and programs.

The kernel

The kernel of UNIX is the hub of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to system calls.

As an illustration of the way that the shell and the kernel work together, suppose a user types rm myfile (which has the effect of removing the file myfile). The shell searches the filestore for the file containing the program rm, and then requests the kernel, through system calls, to execute the program rm and passes the file name as a parameter…

Why Develop For Android?

With over 1 billion Android devices already activated, Android represents an incredible opportunity for developers. Android Studio is a latest and most widely accepted IDE designed by Google itself. If you want to develop apps in android then it is highly recommended to use Android Studio.

Quick Overview

A typical native android application is written using XML for the frontend (the User Interface) and JAVA for the backend.

JAVA All the programming part in android development is done using JAVA. Although it’s a great advantage, if you know a thing or two about programming in Java, but even if you know any…