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Questions and Answers
What are the main categories of sensors in mobile applications?
Motion sensors, environmental sensors, position sensors
Which of the following is a type of motion sensor?
Environmental sensors measure motion and orientation.
False
What does the Android sensor framework provide access to?
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Which Android version first supported the Accelerometer and Magnetic field sensors?
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What are software-based sensors also known as?
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Study Notes
Mobile Application Development - Sensors
- Android devices have built-in sensors that measure motion, orientation, and environmental conditions.
- Sensors are categorized by their function: motion, environmental, and position.
- Motion sensors measure acceleration and rotational forces along three axes.
- Environmental sensors measure parameters like temperature, pressure, light, and humidity.
- Position sensors measure the physical position of a device.
- Android's sensor framework provides access to sensors, both hardware-based and software-based.
- Hardware-based sensors are physical components that directly measure environmental properties.
- Software-based sensors emulate hardware sensors by processing data from them.
- Examples of software-based sensors include linear acceleration and gravity sensors.
- Android versions support various sensor types, with newer versions typically having more options available.
Android Version and Supported Sensors
- Android 1.5 (Cupcake) supports accelerometer and magnetic field sensors.
- Android 1.6 (Donut) adds orientation and temperature sensors to the supported list.
- Android 2.1 (Eclair) introduces proximity and light sensors.
- Android 2.2 (Froyo) adds pressure sensor support.
- Android 2.3 (Gingerbread) includes all sensors mentioned above.
- Android 4 and later versions continue to support these sensors and potentially include newer ones.
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Description
This quiz covers the built-in sensors of Android devices, detailing their various functions and categories such as motion, environmental, and position sensors. It highlights the differences between hardware-based and software-based sensors, and how Android's sensor framework provides access to these functionalities across different versions.
