Android Sensor
- 1. Android application development Sensor Programming
- 2. 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. Let’s create a project named SensorTest
- 4. Activity to a ListActivity 1. We change our Activity to a ListActivity
- 5. 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. ListActivity 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. Declare a List of SensorInfo 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. 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. 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. 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. 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. 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. 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. Create a project as an example We create a layout with a simple image which will move according to the Accelerometer:
- 15. Our Activity
- 16. Android Sensor Programming Adding SensorEventListener inner class with data update
- 17. Android Sensor Programming Declaring variables and registering listener
- 18. Android Sensor Programming Register and unregister listener on activity onStop and onResume: