Book Image

Learning Embedded Android N Programming

By : Ivan Morgillo
Book Image

Learning Embedded Android N Programming

By: Ivan Morgillo

Overview of this book

Take a deep dive into the Android build system and its customization with Learning Embedded Android Programming, written to help you master the steep learning curve of working with embedded Android. Start by exploring the basics of Android OS, discover Google’s “repo” system, and discover how to retrieve AOSP source code. You'll then find out to set up the build environment and the first AOSP system. Next, learn how to customize the boot sequence with a new animation, and use an Android “kitchen” to “cook” your custom ROM. By the end of the book, you'll be able to build customized Android open source projects by developing your own set of features.
Table of Contents (15 chapters)
Learning Embedded Android N Programming
About the Authors
About the Reviewer

Device permissions

As we have seen in previous chapters, Android is based on Linux, so it also inherits the part that concerns user permissions. As with a standard Linux system, Android also manages everything through groups and users. In the default configuration, it's not possible to obtain administrator (root) access, in order to prevent tampering with the system. Also, with access to the whole operating system, it's easy to corrupt the system itself, accidentally or deliberately (for example, to steal user data using a virus).

Every Android app, when installed on the system, generates a new user and group, and inter-app communications are performed according to Android SDK constraints and protocols. Sometimes, though, it's useful to have complete control over the device, like, for example, when installing apps that manage CPU frequency and the CPU governor.

Now let's see how to obtain root access and what the implications of rooting the device are.

Root access

Root access enables the users...