Book Image

Expert Android Programming

Book Image

Expert Android Programming

Overview of this book

Android O brings a number of important changes for the users as well as the developers. If you want to create smart android applications which are fast, lightweight and also highly efficient then this is the book that will solve all your problems. You will create a complex enterprise grade app in this book. You will get a quick refresher of the latest android SDK and how to configure your development environment. Then you will move onto creating app layouts, component and module building, creating smart and efficient UIs. The most important part of a modern day app is how real time they are. With this book, you will create a smooth back-end for your app, ensure dynamic and real time communication between different app layers. As we move on, you will learn to leverage the different Android APIs and create an efficient SQLite data layer for your apps. You will implement effective testing techniques to make your app reliable and robust and finally you will learn to deploy it efficiently. The multiple stages of android development will also be simplified by giving you an industry standard set of best practices.
Table of Contents (17 chapters)
10
Building Restaurant finder

Effective consumption of battery in Zomato

Effective and minimal battery usage has to be performed by any app. An app would be able to do effective consumption of battery by determining the current charge status. Android has a class for determining the current battery status of the app. The BatteryManager broadcasts all battery and charging details in a sticky Intent that includes the charging status.

Using this battery manager, Zomato receives the charging status without registering a BroadcastReceiver by calling registerReceiver and passing in null as the receiver, as shown in the following code:

IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED); 
Intent batteryStatus = context.registerReceiver(null, filter); 

You'll be getting the batteryStatus intent, from which you can extract both the current charging status and if the device is being charged. It...