Android Lollipop: The developer's perspective
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Android 5.0 Lollipop introduces Material Design, enhanced notifications, and improved app management with features like Project Volta for better battery life and concurrent documents handling. New APIs and tools include advanced camera capabilities, a RecyclerView, and support for Android Wear, TV, and Auto. Additionally, it provides updates on Google Play Services, activity transitions, and notifications redesigned for Material Design.
Android Lollipop: The developer's perspective
- 3. What’s New?
- 4. What's new ● Material Design ● Enhanced Notifications ● Concurrent documents in Overview o Intent.FLAG_ACTIVITY_NEW_DOCUMENT o ActivityManager.getAppTasks
- 5. What’s new ● Project Volta ● 3.1 o With Android Extension Pack ● Webview (updatable) o WebAudio
- 6. Android Runtime Evolved - ART ● Ahead-of-time (AOT) compilation ● Improved garbage collection (GC) o Less latency (2ms average) ● Separate heap for big assets (bitmaps) ● 64 bit
- 7. Dalvik vs Art Dalvik ART Uses Just-In-Time (JIT) approach, which results in lower storage space consumption but longer app load times Uses Ahead-Of-Time (AOT) approach, which compiles apps when they’re installed, resulting in faster load times and lower processor usage Cache builds up over time, so boot times are faster Cache is built at first boot, hence rebooting device takes significantly longer Works better for lower internal storage devices as space occupied is lesser Consumes much more internal storage space since it stores compiled apps in addition to the APKs
- 8. Tools ● Variants: different versions of the app (debug vs release or paid vs free) ● APK split combining native with common code
- 10. Google Play Services ● Android Wear Data API o Messages API o Assets API (binary blocks) o DataItem (sync data among devices)
- 11. Google Play Services ● Address API ● OCR scanning of credit cards ● Google Wallet API o Fragments support ● Google Analytics (with Tag manager)
- 12. Google Play Services ● Activity recognition:Walking, running ● Google Cast SDK ● Play Games
- 13. Google Play Services ● Security API ● Google Fit ● Drive API
- 14. Workplace ● Managed provision and unified view of apps o Device Owner (device administrator) ● Screen pinning (lock app in the foreground) ● Screen sharing and capture ● Render PDFs as Bitmaps
- 15. Media ● Advanced camera capabilities o RAW support! ● Audio devices: Low Latency audio input ● Media Browser and Media Session API o Flexible playback control
- 16. Connectivity ● BLE Peripheral Device support o Providing services and scan for services ● Multi Networking o When you need a particular kind of network o ConnectivityManager.requestNetwork o Graceful handoff to another network
- 17. ● … and a few new platforms 1. Android Wear 2. Android TV 3. Android Auto
- 18. Activity and Fragment Transitions ● Activity Transitions o ActivityOptions.makeSceneTransitionAnimation o With declared shared elements to make the transitions smoother o With the possibilities for enter and exit elements o All this thanks to the new Render Thread
- 19. View Transitions ● Reveal o Reveal content with a circular expanding mask Animator reveal = ViewAnimationUtils.createCircularReveal( viewToReveal, // The new View to reveal centerX, // x co-ordinate to start the mask from centerY, // y co-ordinate to start the mask from startRadius, // radius of the starting mask endRadius); // radius of the final mask
- 20. New APIs
- 21. Curved Motion ● Animation Curves o New Interpolators fast-in-slow-out linear-out-slow-in (enter screen) fast-out-linear-in (exit screen) o ObjectAnimator
- 22. Iconography ● State Animators o StateListAnimator and AnimatedStateListDrawable ie. state of a view changes (checkbox) o AnimatedVectorDrawable ● Touch feedback ripples o By default on buttons, very simple otherwise
- 25. Colors ● colorPrimary (brand) ● colorAccent (controls) ● colorPrimaryDark (status bar) ● Palette API ○ Material Color Palettes ○ Swatches
- 26. Recycler Views Generalization of the ListView (aka ListView2)
- 27. CardView <android.support.v7.widget.CardView android:layout_width="match_parent" android:layout_height="wrap_content"> <!-- Your card content --> </android.support.v7.widget.CardView>
- 28. Toolbar ● Generalization of the ActionBar o It can be placed anywhere ● … and it offers support for Custom Views
- 29. Support Library v7 ● Theme.AppCompat ● RecyclerView ● CardView ● Toolbar ● Palette API
- 30. Project Volta ● Improve your battery life! ● JobScheduler API o Start when charging / wifi / unmetered network/ idle / deadline or minimum delay ● Battery Historian o adb shell dumpsys batterystats
- 32. Notifications ● Adapted for Material Design ● Accent Color fills a circle in icon ● Small icon badging ● … expanded views and custom remote views ● MediaStyle Template for media playback
- 33. Notifications ● Heads-up notifications o Floating alerts that can be swiped away ● Lock Screen notifications o PUBLIC, PRIVATE and SECRET notifications NotificationVisibility
- 34. Notifications metadata ● ...anotate them to prioritize them ● Notification categorizations o call, message, alarm, social o EXTRA_PEOPLE (uri or email…) o when: fullscreenintent, prority,= vibrate/sound
- 35. notifications and wear ● What you get on your phone, on your watch ● Or extend: Notification.WearableExtender
- 36. Android TV ● Leanback UI o LEANBACK_LAUNCHER ● @style/Theme.Leanback
- 37. Android Auto ● Audio apps ● Messaging apps
- 39. Thanks! @seviu sebastian@iphonso.com ch.linkedin.com/in/seviu ● Presentation available: o http://goo.gl/hudvPx
Editor's Notes
- #5: The material theme View shadows The RecyclerView widget Drawable animation and styling effects Material design animation and activity transition effects Animators for view properties based on the state of the view Customizable UI widgets and app bars with color palettes that you control Animated and non-animated drawables based on XML vector graphicsLorica will talk more about it Lock screens can now display notifications Visibility Private Visibility Public Visibility Secret Show not only one activity in the list of tasks but several (FLAG_ACTIVITY_NEW_DOCUMENT)
- #6: Ahead of Time Compilation, better GC, improved debugging Chromium M37 PermissionRequest for camera and mic onShowFileChooser
- #15: manually or programatically with StartLockTask’
- #16: uncompressed YUV capture at full 8 Megapixel resolution at 30 FPS. You can also capture raw sensor data and control parameters such as exposure time, ISO sensitivity, and frame duration, on a per-frame basis. Lower input device latency
- #17: Android devices can now function in Bluetooth Low Energy (BLE) peripheral mode. Apps can use this capability to broadcast their presence to nearby devices Apps can dynamically request networks based on capabilities such as metered or unmetered.