CheezyCode

Android Development has become easy these days. With so many open source libraries available, you can implement anything required for your app easily. Smart developers never re-invent the wheel, they build on top of available code base and focus on the app logic.

This is the last post for this app - Just Maths. Best tutorial for beginners to start learning android. So let's just jump right in for the final code and you can download the code as well. In this post, i will just walk-through and integrate the code that we have done so far in our previous android posts. If you have not gone through them, please read those to understand the concepts. You can find the list here - Android

Just Maths app has a timer which is used to track the time in which user has to answer as many questions as possible with either Yes or No option. We will create a timer which ticks every second as a countdown timer or stopwatch. This is going to be a simple timer implemented using the Handler in Android.

Apps require inputs from the user to take action. Generally, you will have a button that starts processing the user input. So let's begin our discussion about Android Button Click Event and Event Handlers. When you click a button, click event is generated as an object. To handle or to take action on button click, you need a handler that will execute your app logic. There are multiple ways to handle click events but we will discuss only one which is most common among android developers.

In the previous post, we looked at Linear Layout . There is another layout which is extremely helpful and flexible in designing good looking apps i.e. Relative Layout. This layout arranges your views relative to its parent or other child views. You can say something like - align this TextView to the left of EditText or align this Button below EditText. To position views inside Relative Layout, child views have to specify layout attributes which align them inside relative layout. If you do not specify any layout attributes for child views, all the child views will be aligned at the top-left corner of the relative layout.

If your app uses icons then you must be aware of the fact that Android requires you to provide icons for various densities such as HDPI, MDPI, XHDPI etc. Designing icons for these densities is an added effort. To avoid this additional effort, you can take advantage of the libraries available. One such library is Font Awesome . Font Awesome is mainly designed for Web Development because it provides CSS file to use icons. But it can also be used for Android. Let's just jump right in and download the required files.

Great android apps require great design. For great design you need to master layouts. Layout is one of the basic building block of Android User Interface. Lets jump right in and try designing layout for our app - Just Maths. Just Maths has 3 screens - Main Menu Screen, Game Screen and Score Screen. Each of the screen is designed using Relative Layout and Linear Layout. There are other layouts as well like Frame Layout, Table Layout and Grid Layout. But you can design anything using only Relative Layout and Linear Layout. These layouts are nothing but View Groups.

Let's start creating our first app - Just Maths. This will be a small app to introduce you to the various aspects of Android App Development - starting with activities and layouts. So just jump right in. What is Activity? Activity is just a single screen. Yes it is that simple. So in our case - Main Menu Screen is one activity, Game Screen is another activity and Score Screen is another activity. Activity is a screen that displays some information to the user or requires some input from the user. Activity handles the interaction with the user.

Each Android app has a corresponding project that needs to be created. Android Studio creates a fully functional Hello World app for us. But what all is included in this project - let's dissect this and understand the structure of a Basic App Project Structure.

Say Hello to Android !! Cheezycode - Hello World Android App Setup Getting started with Android is easy. Android Studio creates all the boilerplate code you need to get started. Once you create a project using Android Studio, you will have a simple Hello World App created for you.

Cheezy Code - Just Maths App Want to build Android Apps really fast? With Android Studio and a blend of Java and XML, you will be up and running and coding Great Android Apps in no time.  Let's get started. We will be creating a very simple app named Just Maths that will ask user a Maths question. User either presses (✔) or (X) to answer the question. This is going to be a project based learning wherein you will have something concrete in the end.