Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Android 9 Development Cookbook
  • Table Of Contents Toc
  • Feedback & Rating feedback
Android 9 Development Cookbook

Android 9 Development Cookbook

By : Boyer
3.4 (9)
close
close
Android 9 Development Cookbook

Android 9 Development Cookbook

3.4 (9)
By: Boyer

Overview of this book

The Android OS has the largest installation base of any operating system in the world. There has never been a better time to learn Android development to write your own applications, or to make your own contributions to the open source community! With this extensively updated cookbook, you'll find solutions for working with the user interfaces, multitouch gestures, location awareness, web services, and device features such as the phone, camera, and accelerometer. You also get useful steps on packaging your app for the Android Market. Each recipe provides a clear solution and sample code you can use in your project from the outset. Whether you are writing your first app or your hundredth, this is a book that you will come back to time and time again, with its many tips and tricks on the rich features of Android Pie.
Table of Contents (18 chapters)
close
close

Creating a Compass using sensor data and RotateAnimation


In the previous chapter, we demonstrated reading sensor data from the physical device sensors. In that recipe, we used the Light Sensor since the data from Environment Sensors generally doesn't require any extra processing. Although it's easy to get the magnetic field strength data, the numbers themselves don't have much meaning and certainly don't create an appealing display.

In this recipe, we'll demonstrate getting the magnetic field data along with the accelerometer data to calculate magnetic north. We'll use SensorManager.getRotationMatrix to animate the compass while responding to the device movement. Here's a screenshot of our compass application on a physical device:

Getting ready

Create a new project in Android Studio and call it Compass. Use the default Phone & Tablet options and select Empty Activity when prompted for the Activity Type.

We will need an image for the compass indicator. There's an image on www.Pixabay.Com...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech

Create a Note

Modal Close icon
You need to login to use this feature.
notes
bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Delete Note

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Edit Note

Modal Close icon
Write a note (max 255 characters)
Cancel
Update Note

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY