Sensors in Android (old)
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1. The document discusses programming with sensors on Android devices. It describes creating a project to test which sensors are supported on a device and in the emulator. 2. Code examples are provided to check for support of various sensors like accelerometer, light, magnetic field, and orientation sensors. 3. The document also discusses an example of using the accelerometer sensor to move an image based on device movement. It describes using a sensor simulator library for emulator testing and registering sensor event listeners.
Sensors in Android (old)
- 1. Android Application Development Sensor Programming Ahsanul Karim [email protected] Sentinel Solutions Ltd. http://www.sentinelbd.com
- 2. Sensor Programming Android Sensors phones support different sensors. 1. Android 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
- 3. Sensor Programming Android Sensors Test We create a project named SensorTest
- 4. Sensor Programming Android Sensors Test change our Activity to a 1. We ListActivity
- 5. Sensor Programming Android Sensors Test use SensorManager class 2. We’ll 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 get back to our 6. Let’s 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 TestNow we check each sensor one by 11. one: First Magnetic field 12. Now we check each sensor one by one: then Orientation
- 9. Sensor Programming Android Sensors TestNow we check each sensor one by 13. one: First Orientation Raw 14. Now we check each sensor one by one: then Proximity
- 10. Sensor Programming Android Sensors TestNow we check each sensor one by 15. one: First Temperature 16. Now we check each sensor one by one: then Tricorder
- 11. Sensor Programming Android Sensors TestTo show the list we do the following by setting 17. 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 run this in Galaxy Lets 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 as an Let’s create a project We create a layout with a simple example 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 and registering Declaring variables listener
- 18. Sensor Programming Android Sensor Programming Register and unregister listener on activity onStop and onResume: