References:

• https://developers.google.com/maps/documentation/android-api/start
• https://developers.google.com/maps/documentation/android-api/config
• Code demo

• Install Android SDK
• Add Google Play services package to project https://developers.google.com/android/guides/setup
• Get a Google Maps API key https://developers.google.com/maps/documentation/android-api/signup#use-key
• Add settings to app's manifest
  • Specify API key
  • Add Android permissions
    • Location permission android.permission.ACCESS_COARSE_LOCATION or android.permission.ACCESS_FINE_LOCATION
    • External storage permission android.permission.WRITE_EXTERNAL_STORAGE
    • Internet access android.permission.INTERNET and android.permission.ACCESS_NETWORK_STATE (will be merged automatically because we used Google Play services)

• Use Android Studio wizard
• https://developers.google.com/maps/documentation/android-api/map

• Plugs Android accounts and authentication framework for handling user credentials (ex: login)
• If don't use user account or login, we still need provide an authenticator component but it's stub
• Bound with a Service that allows the framework call and pass data.

• Create stub Authenticator
• Bind to framework by using Service
• Add metadata file for Authenticator
• Declare Authenticator and AuthenticatorService in manifest

https://developer.android.com/training/sync-adapters/creating-authenticator.html

• Use to store the local data.
• If run SyncAdapter without ContentProvider, the sync adapter crashes

https://developer.android.com/guide/topics/providers/content-provider-creating.html

• Encapsulates the code of tasks that transfer data between the device and server

• Create a sync adapter by extends AbsrtactThreadedSyncAdapter
  • Override onPerformSync
    • Connect to server
    • Download and upload data
    • Handling data conflict
    • Clean up
• Bind SyncAdapter to framework with a Service
• Add metadata file
• Declare SyncAdapter and SyncService in manifest
• Add permissions: android.permission.INTERNET, android.permission.READ_SYNC_SETTINGS, android.permission.WRITE_SYNC_SETTINGS, android.permission.AUTHENTICATE_ACCOUNTS

https://developer.android.com/training/sync-adapters/creating-sync-adapter.html

• Activity implements LoaderManager.LoaderCallbacks<Cursor>
• Loaders do queries in a background thread
• Can use ContentObserver that is triggered when data in the content provider changes. When the sync adapter updates the content provider, the ContentObserver responds by resetting the loader and then reloading it.