Android 1.8 sensor

May 21, 2012Download as PPTX, PDF2 likes1,294 views

The document discusses Android sensor programming and testing different sensors on an Android device. It describes creating a project that lists all sensors and whether they are supported on a device. The project tests sensors like accelerometer, light, magnetic field, orientation, and proximity. It finds that the accelerometer and light are enabled on a Galaxy Tab but other sensors are disabled. It also provides a link to download a sensor simulator library and an example of using the accelerometer sensor to move an image based on device movement.

Android Application Development
Sensor Programming

Ahsanul Karim
ahsanul.karim@sentinelbd.com
Sentinel Solutions Ltd.
http://www.sentinelbd.com

Sensor Programming
Android Sensors
1. Android phones support different sensors.
2. Today we write test code that reports which sensors our Android device supports.
3. Unfortunately, the emulator supports none upto SDK 1.5.
4. But we’ll see how many sensors are supported
in real device
5. We’ll create a project named SensorTest for this.

We’ll test following sensor list:
1. Accelerometer
2. Light
3. Magnetic Field
4. Orientation
5. Orientation Raw
6. Proximity
7. Temperature
8. Tricorder

This is for SDK 1.5

Sensor Programming
Android Sensors Test
We create a project named SensorTest

Sensor Programming
Android Sensors Test
1. We change our Activity to a ListActivity

Sensor Programming
Android Sensors Test
2. We’ll use SensorManager class
3. So we declare a List for SensorInfo
4. SensorInfo is a class defined by us which holds the sensor name and a boolean value
whether its supported or not.
5. So we create a SensorInfo class

Sensor Programming
Android Sensors Test
6. Let’s get back to our ListActivity

7. We’ll now populate the list with all sensors and check whether they are enabled

Sensor Programming
Android Sensors Test
8. We declare a List of SensorInfo

9. Now we check each sensor one by one:
First Accelerometer

10. Now we check each sensor one by one:
then Light

Sensor Programming
Android Sensors Test
11. Now we check each sensor one by one:
First Magnetic field

12. Now we check each sensor one by one:
then Orientation

Sensor Programming
Android Sensors Test
13. Now we check each sensor one by one:
First Orientation Raw

14. Now we check each sensor one by one:
then Proximity

Sensor Programming
Android Sensors Test
15. Now we check each sensor one by one:
First Temperature

16. Now we check each sensor one by one:
then Tricorder

Sensor Programming
Android Sensors Test
17. To show the list we do the following by setting adapter

Now we run the app in emulator.

Except Accelerometer we see all sensors are disabled
May be in later SDKs we’ll get more enabled sensors

Sensor Programming
Android Sensors Test
Lets run this in Galaxy tab
We see the following are enabled:

1. Accelerometer
2. Light
3. Magnetic Field
4. Orientation
5. Orientation Raw
6. Proximity

So the sensor support varies from
Vendor to vendor and model to model

Sensor Programming
Android Sensor Programming
As we see that Accelerometer is the
1. most commonly used sensor and also
2. it has many applications in games development,
We’ll see and example of Sensor programming with Accelerometer

And as we don’t have option to move the emulator we may have to use a
sensor simulator which will simulate the sensor data.
So we download the library for sensorsimulation at:
http://openintents.googlecode.com/files/sensorsimulator-1.1.0-rc1.zip
http://code.google.com/p/openintents/downloads/detail?name=sensorsimulator-1.1.0-rc1.zip&can=2&q=
http://code.google.com/p/openintents/wiki/SensorSimulator

We can follow their instruction to use it.

But here, we’ll do it in our real device, so simulator will not be required

Sensor Programming
Android Sensor Programming
Let’s create a project as an example We create a layout with a simple image
which will move according to the
Accelerometer:

Sensor Programming
Android Sensor Programming
Our Activity:

Sensor Programming
Android Sensor Programming
Adding SensorEventListener inner class with data update

Sensor Programming
Android Sensor Programming
Declaring variables and registering listener

Sensor Programming
Android Sensor Programming
Register and unregister listener on activity onStop and onResume:

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1. Android Application Development Sensor Programming Ahsanul Karim [email protected] Sentinel Solutions Ltd. http://www.sentinelbd.com

2. Sensor Programming Android Sensors 1. Android phones support different sensors. 2. Today we write test code that reports which sensors our Android device supports. 3. Unfortunately, the emulator supports none upto SDK 1.5. 4. But we’ll see how many sensors are supported in real device 5. We’ll create a project named SensorTest for this. We’ll test following sensor list: 1. Accelerometer 2. Light 3. Magnetic Field 4. Orientation 5. Orientation Raw 6. Proximity 7. Temperature 8. Tricorder This is for SDK 1.5

3. Sensor Programming Android Sensors Test We create a project named SensorTest

4. Sensor Programming Android Sensors Test 1. We change our Activity to a ListActivity

5. Sensor Programming Android Sensors Test 2. We’ll use SensorManager class 3. So we declare a List for SensorInfo 4. SensorInfo is a class defined by us which holds the sensor name and a boolean value whether its supported or not. 5. So we create a SensorInfo class

6. Sensor Programming Android Sensors Test 6. Let’s get back to our ListActivity 7. We’ll now populate the list with all sensors and check whether they are enabled

7. Sensor Programming Android Sensors Test 8. We declare a List of SensorInfo 9. Now we check each sensor one by one: First Accelerometer 10. Now we check each sensor one by one: then Light

8. Sensor Programming Android Sensors Test 11. Now we check each sensor one by one: First Magnetic field 12. Now we check each sensor one by one: then Orientation

9. Sensor Programming Android Sensors Test 13. Now we check each sensor one by one: First Orientation Raw 14. Now we check each sensor one by one: then Proximity

10. Sensor Programming Android Sensors Test 15. Now we check each sensor one by one: First Temperature 16. Now we check each sensor one by one: then Tricorder

11. Sensor Programming Android Sensors Test 17. To show the list we do the following by setting adapter Now we run the app in emulator. Except Accelerometer we see all sensors are disabled May be in later SDKs we’ll get more enabled sensors

12. Sensor Programming Android Sensors Test Lets run this in Galaxy tab We see the following are enabled: 1. Accelerometer 2. Light 3. Magnetic Field 4. Orientation 5. Orientation Raw 6. Proximity So the sensor support varies from Vendor to vendor and model to model

13. Sensor Programming Android Sensor Programming As we see that Accelerometer is the 1. most commonly used sensor and also 2. it has many applications in games development, We’ll see and example of Sensor programming with Accelerometer And as we don’t have option to move the emulator we may have to use a sensor simulator which will simulate the sensor data. So we download the library for sensorsimulation at: http://openintents.googlecode.com/files/sensorsimulator-1.1.0-rc1.zip http://code.google.com/p/openintents/downloads/detail?name=sensorsimulator-1.1.0-rc1.zip&can=2&q= http://code.google.com/p/openintents/wiki/SensorSimulator We can follow their instruction to use it. But here, we’ll do it in our real device, so simulator will not be required

14. Sensor Programming Android Sensor Programming Let’s create a project as an example We create a layout with a simple image which will move according to the Accelerometer:

15. Sensor Programming Android Sensor Programming Our Activity:

16. Sensor Programming Android Sensor Programming Adding SensorEventListener inner class with data update

17. Sensor Programming Android Sensor Programming Declaring variables and registering listener

18. Sensor Programming Android Sensor Programming Register and unregister listener on activity onStop and onResume:

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