Mobile UX Constraints and RecyclerView
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Questions and Answers

What is the Android best practice regarding sensor usage to conserve battery power?

  • Do not worry about sensor usage as it does not significantly impact battery life
  • Disable sensors using the onResume() and onPause() callback methods (correct)
  • Enable sensors only when the screen is turned on
  • Always keep all sensors enabled to ensure smooth functioning of the app

    • Why is it important to disable sensors that are not in use in Android?

  • To prevent the app from using too much memory
  • To avoid draining the battery quickly (correct)
  • To ensure smooth functioning of the app
  • To reduce app functionality

    • What is a recommended technique to conserve limited data in Android?

  • Increase data transmission to compensate for limited data
  • Avoid using succinct data protocols as they are not reliable
  • Use JSON and XML for data transmission due to language flexibility
  • Compress data using a technique such as GZIP compression (correct)

    • What are the constraints associated with mobile usage, as mentioned in the text?

    <p>Divided user attention and small screen</p> Signup and view all the answers

    Which format is mentioned as bandwidth-heavy with high serialization costs in the Android platform?

    <p>JSON and XML</p> Signup and view all the answers

    Which method can make an Android application significantly more useful and compelling for users?

    <p>Using Sync Adapters</p> Signup and view all the answers

    What type of radio generally offers greater bandwidth at a significantly lower battery cost?

    <p>Wi-Fi radio</p> Signup and view all the answers

    What is the primary advantage of using binary serialization formats like Protocol Buffers or FlatBuffers?

    <p>Smaller packet size</p> Signup and view all the answers

    What is the recommended approach for avoiding downloading duplicate data in an Android app?

    <p>Cache static resources for as long as reasonably possible</p> Signup and view all the answers

    In the context of Android app development, what can make a useful backup and consume lower energy?

    <p>Transferring data from a web server</p> Signup and view all the answers

    What is the potential benefit of using binary serialization formats like Protocol Buffers or FlatBuffers in Android development?

    <p>Smaller on-the-wire packet size for data transfer</p> Signup and view all the answers

    How can an Android app avoid downloading duplicate data?

    <p>By caching static resources for as long as possible</p> Signup and view all the answers

    In terms of data transfer, what is the recommended approach to conserve battery power when connected over Wi-Fi?

    <p>Endeavor to perform data transfers when connected over Wi-Fi whenever possible</p> Signup and view all the answers

    What can make an Android application significantly more useful and compelling for users?

    <p>Syncing data between the device and web servers</p> Signup and view all the answers

    What is the primary advantage of using Wi-Fi for data transfer in Android?

    <p>Lower energy cost compared to LTE</p> Signup and view all the answers

    What is the recommended approach for conserving limited data in Android apps?

    <p>Compressing data using a compression technique such as GZIP</p> Signup and view all the answers

    What is the Android best practice regarding sensor usage to conserve battery power?

    <p>Use onResume() and onPause() callback methods to register and unregister sensor event listeners</p> Signup and view all the answers

    Which serialization format is mentioned as bandwidth-heavy with high serialization costs in the Android platform?

    <p>JSON</p> Signup and view all the answers

    What can drain the battery in just a few hours if not disabled due to substantial power requirements?

    <p>Wireless Radio (2G, 3G, 4G, LTE)</p> Signup and view all the answers

    What is the primary advantage of utilizing binary serialization formats like Protocol Buffers or FlatBuffers?

    <p>Lower energy consumption</p> Signup and view all the answers

    Study Notes

    Sensor Usage and Power Conservation

    • Disable sensors that are not in use to conserve battery power in Android
    • Android best practice: disable unused sensors to conserve battery power

    Data Conservation in Android

    • Recommended technique to conserve limited data: avoid downloading duplicate data
    • Use binary serialization formats like Protocol Buffers or FlatBuffers to conserve data
    • Use Wi-Fi for data transfer to conserve battery power

    Serialization Formats

    • Binary serialization formats like Protocol Buffers or FlatBuffers are recommended for data transfer
    • These formats conserve data and reduce serialization costs
    • XML is mentioned as a bandwidth-heavy format with high serialization costs in the Android platform

    Radio Technology and Bandwidth

    • Wi-Fi radio technology generally offers greater bandwidth at a significantly lower battery cost

    Android App Development

    • Make an Android application significantly more useful and compelling for users by utilizing sensors and data efficiently
    • Backup data locally to avoid downloading duplicate data and conserve energy
    • Use Wi-Fi for data transfer to conserve battery power

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    Description

    Learn about the constraints faced by mobile UX design, such as limited data, finite battery, hand-held usage, divided user attention, and small screens. Explore the implementation of RecyclerView, CardView, ViewHolder, and RecyclerView.Adapter in the context of mobile programming.

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