Android Core

In this post, I want to describe how to use a very powerful and easy to use library for Android. This library is called Volley and it can be used to handle networking connection. In previous post, we talked about HttpUrlConnection and Apache HTTP client. They are both valid and useful but using Volley we can simplify our work. Volley ...

This tutorial describes how to use JSON with Android. JSON stands for (Java Script Object Notation). It is a simple and light-weight data interchange format that can be easily read by humans and machines. JSON is a text format that is language independent. It represents data in a text format so that can be easily parsed. Introduction to JSON JSON uses two different of ...

In this post, we want to show how to use SlidingPaneLayout. This is an interesting component that can be used when we want to have a multi-pane horizontal layout. This component is divided in two different parts: left side: The master part. It usually contains a list of values (i.e. Contacts and so on) right side: The detail part. It ...

Introduction Image Filter allows you to add various effects on image. There are mainly two purpose of Image Processing: Image Understanding: It is used to identify content of image, weather image has human faces, objects (bus, train, etc.), measure dimension of objects,etc. OpenCV (Open Source Computer Vision Library) is one of the main library used for Image Understanding. Image Beautify : ...

What happened when I long press power button ? What is shutdown sequence ? How is it different from desktop linux shutdown sequence? How to change shutdown menu ? Many questions pop-up in mind when we think about Android shutdown sequence. Before you read about shutdown sequence I suggest you to read about boot sequence article. Android is linux based ...

Introduction NotificationListenerService is introduced in Android 4.3 (API 18). It allows an application to receive information about notifications as it creates or removes. NotificationListenerService class is derived from the Service class. It has two abstract methods namely 1. onNotificationPosted 2. onNotificationRemoved. To use NotificationListenerService, we need to create a java file which extends NotificationListenerService and implement two callback methods. Both ...

Metaio SDK is advanced as compared to Vuforia SDK, Metaio SDK is developer friendly such that any beginner or novice developer can develop good quality of AR application. High-level system overview 1. Setup Metaio SDK 4.5 I assume that you already have Android SDK and NDK setup in computer. Step 1: Download Metaio SDK 4.5 for Android http://dev.metaio.com/sdk/getting-started/ Step 2: ...

Feeling good to be back at blog . Actually I have been managing GDG Ahmedabad, delivering android talks and managing workshops locally and outside my regions. Last month, I was quite busy in organizing “DevFest” event for the GDG Ahmedabad and then for the preparation of my 2 talks for the GDG Kathmandu DevFest. I was invited to deliver 2 ...

In this tutorial we are going to see how you can create a simple Android Layout with a fixed header and footer but with a scrollable content. You may find this particularly useful when some components of your layout should always be visible to the user despite the number of  items to be displayed. Menu bars, option buttons, widgets or ...