Android basics (for newcomers)

Transcript

1. Paris, March 24th 2015 Android Introduction Basic concepts to understand Android applications
2. Here is the legend or source Outline • Make-up of an app • Android ecosystem • A bit of design Android Introduction 2015 •
3. Android Introduction 2015 • Activities • Necessary to display content on screen • Takes the full screen (except status bar and virtual buttons) • Should be : one activity = one user action (read, write, search, …)
4. Android Introduction 2015 • Activities : Lifecycle Resumed Paused Stopped
5. Android Introduction 2015 • Activities : Lifecycle
6. Android Introduction 2015 • Activities : Fragments
7. Android Introduction 2015 • Intents • Used to call new components (like Activities) • Two types of intent : • Explicit • Implicit new Intent(context, DiveCreateVisibilityActivity.class); new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
8. Android Introduction 2015 • Implicit intents • If several applications can answer the intent, a picker asks the one the user wants to use
9. Android Introduction 2015 • Implicit intents : examples • ACTION_VIEW content://contacts/people/1 • ACTION_DIAL content://contacts/people/1 • ACTION_VIEW tel:123 • ACTION_DIAL tel:123 • ACTION_EDIT content://contacts/people/1 • ACTION_VIEW content://contacts/people/
10. Android Introduction 2015 • Services • Background component • Not linked to an activity : can survive after the leaves the app, across activities, … • Communication with Activities through Intents • Uses : • Background sync • Music • Heavy calculations
11. Android Introduction 2015 • Broadcasts • Intents sent at the system level for all apps to listen • Multiple applications can be triggered by the same broadcast (vs implicit Intent) • Examples : • ACTION_BOOT_COMPLETED • ACTION_SHUTDOWN • ACTION_POWER_CONNECTED • Push
12. Android Introduction 2015 • Content Providers • Abstraction for access to data (generally : database) • Can work across applications • Examples : • Contacts • Calendar
13. Android Introduction 2015 • Manifest • Name, Icon, Package, Version • Permissions • Device Restrictions • Components • Activities • Services • Content Providers • Background Receivers
14. Android Introduction 2015 • Permissions • Required (and shown) before installation (vs iOS) • Required for anything (> 150) : • Internet • Location • Storage • Battery stats • Bluetooth, NFC, Sensors • Acces and modify user data • Possible to create new permissions
15. Android Introduction 2015 • Gmail permissions : 33 android.permission.AUTHENTICATE_ACCOUNTS android.permission.ACCESS_NETWORK_STATE android.permission.GET_ACCOUNTS android.permission.MANAGE_ACCOUNTS android.permission.INTERNET android.permission.READ_CONTACTS android.permission.WRITE_CONTACTS android.permission.READ_CALENDAR android.permission.WRITE_CALENDAR android.permission.READ_SYNC_SETTINGS android.permission.READ_SYNC_STATS android.permission.RECEIVE_BOOT_COMPLETED android.permission.SUBSCRIBED_FEEDS_READ android.permission.SUBSCRIBED_FEEDS_WRITE android.permission.USE_CREDENTIALS android.permission.VIBRATE android.permission.WAKE_LOCK android.permission.WRITE_SYNC_SETTINGS android.permission.WRITE_EXTERNAL_STORAGE com.google.android.gm.permission.READ_GMAIL com.google.android.gm.permission.WRITE_GMAIL com.google.android.googleapps.permission.GOOGLE_AUTH com.google.android.googleapps.permission.GOOGLE_AUTH.mail com.google.android.providers.gsf.permission.READ_GSERVICES com.google.android.gm.permission.AUTO_SEND com.google.android.voicesearch.AUDIO_FILE_ACCESS android.permission.DOWNLOAD_WITHOUT_NOTIFICATION android.permission.NFC com.google.android.gm.email.permission.READ_ATTACHMENT com.google.android.email.permission.READ_ATTACHMENT com.google.android.gm.email.permission.ACCESS_PROVIDER com.google.android.email.permission.ACCESS_PROVIDER android.permission.READ_PROFILE
16. Android Introduction 2015 • Apk Manifest lib res assets classes.dex resources.arsc META-INF
17. Android Introduction 2015 • Manifest : Gmail <?xml version="1.0" encoding="utf-8" standalone="no"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.google.android.gm" platformBuildVersionCode="21"> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.GET_ACCOUNTS"/> <uses-permission android:name="android.permission.MANAGE_ACCOUNTS"/> <uses-permission android:name=“android.permission.INTERNET"/> <application android:icon="@mipmap/ic_launcher_mail" android:theme="@style/UnifiedEmailTheme"> <activity android:name=".welcome.WelcomeTourActivity" android:theme="@style/GmailTheme.NoActionBar.WelcomeTour"/> <activity android:name=".welcome.SetupAddressesActivity" android:theme="@style/GmailTheme.NoActionBar.SetupAddresses"/> <activity android:name=".welcome.WelcomeVideoActivity" android:theme="@style/GmailTheme.NoActionBar.Fullscreen"/> <provider android:authorities="com.google.android.gmail.attachmentprovider;com.google.android.gm.email.attachmentprovider" android:name="com.android.email.provider.AttachmentProvider"/> <receiver android:exported="true" android:name="com.android.email.service.AttachmentService$AttachmentWatchdog"/> <service android:name="com.android.mail.compose.EmptyService"/> <service android:name="com.android.mail.MailLogService"/> <service android:name="com.android.mail.browse.EmlTempFileDeletionService"/> </application> </manifest>
18. Here is the legend or source Outline • Make-up of an app • Android ecosystem • A bit of design Android Introduction 2015 •
19. Android Introduction 2015 • Fragmentation : devices
20. Android Introduction 2015 • Fragmentation : OS
21. Android Introduction 2015 • Fragmentation : OS
22. Fragmentation : screens
23. Android Introduction 2015 • Fragmentation AOSP Support Library Play Services
24. Android Introduction 2015 • Fragmentation
25. Android Introduction 2015 • Design
26. 2015 • Keylines Material Design (dev)
27. 2015 • Text Material Design (dev) @style/TextAppearance.AppCompat.Title @style/TextAppearance.AppCompat.Body1
28. 2015 • Icons Material Design (dev) https://github.com/google/material-design-icons
29. 2015 • Elevation Material Design (dev) ViewCompat.setElevation(view, 8dp) CardView + card_view:cardElevation PNG
30. Android Introduction 2015 • Action Bar
31. ToolBar : default metrics Material Design (dev)
32. Android Introduction 2015 • Floating Action Button
33. Android Introduction 2015 • Navigation Drawer
34. Android Introduction 2015 • Navigation Drawer
35. 2015 • Navigation Drawer Material Design (dev) https://github.com/ mikepenz/MaterialDrawer
36. 2015 • Dialogs : AppCompatDialog Material Design (dev)
37. 2015 • Bottom sheets Material Design (dev) https://github.com/ soarcn/BottomSheet
38. Android Introduction 2015 • Up vs Back Navigation
40. Android Introduction 2015 • Up vs Back Navigation
41. Android Introduction 2015 • Up vs Back Navigation
42. Android Introduction 2015 • Up vs Back Navigation
43. Android Introduction 2015 • Notifications
44. Android Introduction 2015 • Notifications
45. Android Introduction 2015 • Notifications
46. Android Introduction 2015 • Notifications
47. Android Introduction 2015 • Notifications
48. I/O Recap 2014 • Material design
49. Nom de la présentation 2012 • Material design Cross platform design: phones, tablets, laptops, web Metaphor: paper and ink Animations and transitions Shadows Vivid colors Ripples
50. I/O Recap 2014 • Topics Android Wear Android Auto Android TV
51. Any questions ? Thanks