Android Services Skill Sprint
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This document discusses Android services for background execution in mobile applications. It defines services and how they differ from threads, describes the various types of services and how to create them using the Android service wizard in RAD Studio. It also demonstrates services and discusses restrictions and workarounds. Resources for learning more about services are provided.
Android Services Skill Sprint
- 1. embt.co/sprint-android-servicesBlog Notes: Android Services for Background Execution Developer Skill Sprint Tips, Tricks and Techniques The Ultimate Application Development platform for Widows 10, Mac, Mobile and IoT Jim McKeeth Developer Evangelist / Engineer Embarcadero Technologies Jim.McKeeth@Embarcadero.com Nov 10th, 2015 @JimMcKeeth
- 2. embt.co/sprint-android-servicesBlog Notes: This Skill Sprint Works with . . . • Windows • OS X • Android • iOS • RAD Studio • Appmethod • Object Pascal • C++ • RAD Studio 10 Seattle DocWiki – http://docwiki.embarcadero.com/RADStudio/Seattle/en/ • Appmethod Summer 2015 Release DocWiki – http://docwiki.appmethod.com/appmethod/1.17/topics/en/ • Appmethod supports the FireMonkey framework on all four platforms while RAD Studio, Delphi and C++Builder also support VCL on Windows. Contact sales with any questions!
- 3. embt.co/sprint-android-servicesBlog Notes: Agenda • What are Android Services • Services vs. Threads • Types of Services • Android Service Wizard • Demonstrations • More Information
- 4. embt.co/sprint-android-servicesBlog Notes: Why Android Services? • Provide background functionality • Can run even when app is closed • Can start on boot or on other events • Can be accessible by multiple apps • Can contain multiple threads
- 5. embt.co/sprint-android-servicesBlog Notes: Android Services vs. Threads Android Services • Cannot access the UI • Runs in main thread of host app process • Can contain multiple threads • Used for long running processes Threads • Cannot access the UI • Not accessible to other apps • Terminated with app • Used to improve responsiveness
- 6. embt.co/sprint-android-servicesBlog Notes: Android Service Type Variations • IntentService – Handle asynchronous requests (onHandleIntent(Intent) event) – Otherwise are syncronous (onStartCommand(Intent) event) – Both are Bindable (onBind event) • Local vs. Remote – Local only accessible by host (exported = false in manifest) – Remote cross app access (exported = true in manifest)
- 7. embt.co/sprint-android-servicesBlog Notes: Android Service Wizard • Local Service – Synchronous local access • Intent Local Service – Asynchronous local access • Remote Service – Synchronous local & remote access • Intent Remote Service – Asynchronous local & remote access
- 9. embt.co/sprint-android-servicesBlog Notes: Restrictions for Services • Cannot Access UI • Not use components from the FMX namespace • Be aware of power consumption – Using a lot of CPU – Using network connection • Respect users expectations and privacy
- 10. embt.co/sprint-android-servicesBlog Notes: Service Workarounds • Use RTL or low-level calls instead of FMX components. If the service fails when started, use a lower level call. • Manually edit manifest to make remote services published. • Manually edit Java Templates for Intent and Remote Services (See http://delphi.org/?p=2084)
- 11. embt.co/sprint-android-servicesBlog Notes: Learning Resources • DocWiki – http://docwiki.embarcadero.com/RADStudio/Seattle/en/Android_Service – http://docwiki.embarcadero.com/RADStudio/Seattle/en/Creating_Android_Services • CodeRage X – Android Services on YouTube – http://embt.co/crx-android-services • Blog Posts – http://delphi.org/tag/android-services/ – http://community.embarcadero.com/blogs/entry/download-an-image-in-background- with-android-services Download a free trial! embt.co/trialdownloads
- 12. embt.co/sprint-android-servicesBlog Notes: Next Time . . . GPU Computing with OpenCL See the full schedule and replays at embt.co/Sprints15 • Tuesday, the 17th of November, 2014 – 6AM San Francisco / 9AM New York / 2PM London / 3PM Milan – 11AM San Francisco / 2PM New York / 7PM London / 8PM Milan – 5PM San Francisco / Wed 10AM Tokyo / Wed 12PM Sydney (Based on San Francisco time. Verify your local time are correct: http://embt.co/nov17thtimes) Download a free trial! embt.co/trialdownloads
- 13. embt.co/sprint-android-servicesBlog Notes: See the special offers embt.co/try-rad-studio
- 14. embt.co/sprint-android-servicesBlog Notes: Q&A Developer Skill Sprint Tips, Tricks and Techniques The Ultimate Application Development platform for Widows 10, Mac, Mobile and IoT Jim McKeeth Developer Evangelist / Engineer Embarcadero Technologies Jim.McKeeth@Embarcadero.com November 10th, 2015 @JimMcKeeth Thank-You! Download a free trial! embt.co/trialdownloads