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Week 4: Lesson 7: Integrating Sensors Into Java For Android

Lesson 7: Integrating Sensors Into Java For Android
INTRODUCTION
In this lesson you will
learn more about relative layouts and how these can accommodate a variety of
different content in your application. You will also be introduced to the
variety of sensors available for Android mobile application hardware and software
and how they function based on motion or environmental conditions. Within this
lesson you will also be introduced to the Accelerometer Motion sensor and will
learn how to integrate it into your application.
LESSON
OBJECTIVES
By the end of this lesson, you will be able to:
Section #1: Understanding Sensors in Java For
Android
1.     Summarize the use of sensors in mobile
applications.
Section #2: Understanding Relative Layouts
1.     Summarize the benefits of a relative layout.
Section
#3:
Video Demonstration: Relative
Layouts & Integration Accelerometer Sensor
LEARNING SEQUENCE
Required Reading
Read the following:
·     
Section
#1:
·     
Section
#2:
Resources
View the
following: 
·     
Sample Code
·     
Video Transcripts
Assignments
Complete the
following:
·     
What are sensors in
mobile applications and how are they used to interpret information from the
world around them?
·      
What are the
benefits of using a relative layout for your application?  Why are positioning views important in a
relative layout? What do they do?
INSTRUCTION

Section #1: Understanding Sensors in Java For Android

In this
section, you will be introduced to what sensors on applications are and how
they can be integrated into Android applications. You will learn how motion
sensors work and how to integrate the Accelerometer sensor into an Android
application. You will also be introduced to the SensorEvent class which
supports the integration of the sensors into Java for Android.
Step 1.
Read the Sensors Overview
provided by Android. This reading will explain the three main types of sensors,
included motion, environmental and position sensors and how these have been
integrated into Android application development. The reading provides an
overview of the sensor framework, classes and interfaces that help you to
perform different types of sensor-related tasks used on Android.
Step 2.
This web page describes
the variety of motion sensors available with Java for Android. This reading
will describe the difference between hardware- and software-based sensors and
outlines how motion sensors can be used to monitor device movement (tilt,
shake, rotation and swing) from direct user input. The page also reviews the
application of motion sensors for reading device movement. A list of motion sensors
available on the Android platform is provided with descriptions. This page also
introduces you to the Using the Accelerometer. 
Step 3.
The
section on the Accelerometer sensor gives you a conceptual model and code
examples of how to measure the acceleration
applied to the device, including the force of gravity. The reading explains how
the accelerometer can be used to monitor device motion and how pervasive it is
in Android devices such as handsets and tablets. 
Step 4.
This is a class described for the use of a
SensorEvent in your Java code. Use this document as a guide when implementing
it into your code. It provides an overview and a sample.
Step 5.
Complete Assignment #1: Describe the intents that you see in
your current mobile application.
Section #2: Understanding Relative Layouts
In this
section you will understand how to create a relative layout and edit its
attributes and then integrate it into a Java for Android project.
Step 1.
Use the reading provided to review what
relative layouts are and how they can organize the content of your page. This
reading provides the benefits of using a relative layout and how it can benefit
the design of your application. This resource also provides the details of
positioning views within the relative layout. A sample of the relative layout
in XML is provided and will be useful to you as you complete the video
tutorial. The additional sensors listed will assist you with future development
projects.
Step 2.
Complete Assignment #2: What are the benefits of using a relative layout for your
application? Why are positioning views important in a relative layout? What do
they do?

Section #3: Video
Demonstration of Relative Layouts & Integration Accelerometer Sensor

In this
video you will create a new XML file for the Accelerometer and add the Accelerometer
to the menu. You will also create the Java code for the Accelerometer and add
the necessary activity code to the Android Manifest to have the Accelerometer
run within the application.
Step 1.
View & Practice: Lesson 7 [12:33]
SUMMARY
In this
lesson you have practiced using sensors in mobile application development using
Java. You were provided an overview of how sensors interact with environmental
factors, while you created the Java code for integrating an accelerometer
sensor into your project. You also integrated a relative layout into your
project and learned how the positioning views can adjust your project in the
layout. In the next lesson you will learn how to integrate an image swiper
into your application and. You will use the same process of creating an XML
file by adding the item to the menu and creating the Java for the swiper to
run.
ASSIGNMENTS
·      What are sensors in mobile applications and how are they
used to interpret information from the world around them?

·      What are the benefits of using a relative layout for your
application? Why are positioning views important in a relative layout? What do
they do?

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