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Streaming Big Data: Storm, Spark and Samza

There are a number of distributed computation systems that can process Big Data in real time or near-real time. This article will start with a short description of three Apache frameworks, ...
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Lambda Architecture for Big Data

An increasing number of systems are being built to handle the Volume, Velocity and Variety of Big Data, and hopefully help gain new insights and make better business decisions. Here, ...
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Android Tips: On/Off Toggle

When we need to give to users of our apps the ability to switch on/off a given feature, we automatically think of check boxes, toggle buttons or switches:These widgets are available ...
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NoSQL on Android

There are various NoSQL solutions for mobile platforms such as the iOS and Android. Here, we will look at Couchbase Lite (CBL – the successor of TouchDB), a lightweight, full-featured, ...
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Storing Objects in Android

One alternative to using SQLite on Android is to store Java objects in SharedPreferences. Here, we’ll look at two different ways to do that. Why not go for SQLite for all storage ...
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Android Activity Recognition

Activity Recognition gives our Android device the ability to detect a number of our physical activities like walking, riding a bicycle, driving a car or standing idle. All that by simply ...
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Bluetooth Data Transfer with Android

To develop an Android application making use of data transfers via Bluetooth (BT), one would logically start at the Android Developer’s Bluetooth page, where all the required steps ...
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Android Expandable/Collapsible Views

Android Expandable/Collapsible Views Expandable/Collapsible Views (text, images, etc.) in Android are useful when we want to display all the available options on one screen, without ...
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Google Cloud Messaging: Collapsible Messages

In a previous article, we looked at how to set up Google Cloud Messaging (GCM) in Android applications. We learned that GCM is a free service that allows us to push messages from the ...
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Android Geofencing with Google Maps

A geofence is a virtual perimeter of interest that can be set up to fire notifications when it is entered or exited, or both. For example, a geofencing app can alert us that our kid ...
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