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Questions and Answers
What are the main categories of sensors in mobile applications?
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?
Which of the following is a type of motion sensor?
Environmental sensors measure motion and orientation.
Environmental sensors measure motion and orientation.
False
What does the Android sensor framework provide access to?
What does the Android sensor framework provide access to?
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Which Android version first supported the Accelerometer and Magnetic field sensors?
Which Android version first supported the Accelerometer and Magnetic field sensors?
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What are software-based sensors also known as?
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.
