Android 1.8 sensor

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Tutorial on Sensors

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Android 1.8 sensor

  1. 1. Android Application Development Sensor Programming Ahsanul Karim ahsanul.karim@sentinelbd.com Sentinel Solutions Ltd. http://www.sentinelbd.com
  2. 2. Sensor ProgrammingAndroid 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. 3. Sensor ProgrammingAndroid Sensors Test We create a project named SensorTest
  4. 4. Sensor ProgrammingAndroid Sensors Test 1. We change our Activity to a ListActivity
  5. 5. Sensor ProgrammingAndroid 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. 6. Sensor ProgrammingAndroid 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. 7. Sensor ProgrammingAndroid 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. 8. Sensor ProgrammingAndroid 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. 9. Sensor ProgrammingAndroid 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. 10. Sensor ProgrammingAndroid 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. 11. Sensor ProgrammingAndroid Sensors Test 17. To show the list we do the following by setting adapterNow we run the app in emulator.Except Accelerometer we see all sensors are disabledMay be in later SDKs we’ll get more enabled sensors
  12. 12. Sensor ProgrammingAndroid 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. 13. Sensor ProgrammingAndroid 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. 14. Sensor ProgrammingAndroid 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. 15. Sensor ProgrammingAndroid Sensor Programming Our Activity:
  16. 16. Sensor ProgrammingAndroid Sensor Programming Adding SensorEventListener inner class with data update
  17. 17. Sensor ProgrammingAndroid Sensor Programming Declaring variables and registering listener
  18. 18. Sensor ProgrammingAndroid Sensor Programming Register and unregister listener on activity onStop and onResume:

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