BBM Call Out 101

Pengenalan fitur callOut di BBM.

Transcript

1. BBM Call Out 101 By Call Out Jakarta Android Team
2. We Have BBM Call Already Why We Need Call Out ? https://giphy.com/gifs/reaction-a5viI92PAF89q
4. Why Call Out is Made • Needs to contact family/relatives in areas with internet connectivity issue • Phone call is still main way of people to communicate • Demand for competitive rate of calls
5. What is BBM Call Out • A service to provide BBM account a virtual phone number (VN) • A virtual phone number can be used for voice and SMS, both in and out • Business Cooperation with Smartfren as Telco Provider
6. Requirement To Get VN • Accept ToC • KTP & KK - Indonesian Resident • VN ready to use • Voice/SMS In is free of charge • Voice/SMS Out is chargeable (DANA)
8. VN can Expire • VN will expire if not used to make chargeable call within 90 days • To prevent expiry, make outgoing call or receive incoming call from non Smartfren number • Once expired, we can not get same VN if re-register
9. How Call Out Works
10. Tech? Challenge • Platform Team: • Leverage MediaCallManager • Instead of user uri, use phone number as ID • Backend & Platform Team • Working with 3rd party require effective communication and patience
12. Tech? Challenge • Android Team: • Smartfren require user to give exact location when user access Call Out • Team does not want to reinvent the wheels • Leverage BBMLocationManager
13. http://mathtourist.blogspot.com/2011/05/riding-on-square-wheels.html The Wheels is Unfit
14. Tech? Challenge • BBMLocationManager • Low accuracy • Long interval cache • Using old Android’s Location API
15. Tech? Challenge • Instead of using BBMLocationManager, we decide to use
 Android’s Fused Location Provider API 
 (part of Google Play Services) • Simple API and battery-efficient • Manages underlying location technologies 
 (GPS and Wi-Fi) • Best accuracy possible with no additional power consumption • Provide Last Known Location and Query Location Updates
16. FusedLocationProviderClient <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> // Play Location Services implementation "com.google.android.gms:play-services-location:16.0.0" implementation "com.android.support:support-v4:$support_version" app/build.gradle app/../AndroidManifest.xml
17. FusedLocationProviderClient <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> // Play Location Services implementation "com.google.android.gms:play-services-location:16.0.0" implementation "com.android.support:support-v4:$support_version" app/build.gradle app/../AndroidManifest.xml
18. Implementation typealias LocationData = Pair<Double, Double> interface FusedLocationWrapper { fun lastKnownLocation(): Single<LocationData> fun locationUpdates(): Observable<LocationData> }
19. Last (Known) Location class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { @SuppressLint("MissingPermission") @MainThread override fun lastKnownLocation(): Single<LocationData> = Single.create<LocationData> { emitter -> client.lastLocation .addOnSuccessListener { location -> location?.let { emitter.onSuccess(it.latitude to it.longitude) } } .addOnFailureListener { emitter.onError(it) } }.subscribeOn(AndroidSchedulers.mainThread())
20. Last (Known) Location • Last Location usually equivalent with user current location • Last Location may return null value when • Location (GPS) is turned off 
 (will clear last location cache if already retrieved) • Device never record location 
 (new device or factory resetted) • Google Play Services restarted on device
21. Location Updates class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { . . . override fun lastKnownLocation(): Single<LocationData> = . . . @SuppressLint("MissingPermission") @MainThread override fun locationUpdates(): Observable<LocationData> = Observable.create<LocationData> { emitter -> val request = LocationRequest().apply { interval = 1_000 fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } val callback = object : LocationCallback() { override fun onLocationResult(location: LocationResult?) { location?.lastLocation?.let { emitter.onNext(it.latitude to it.longitude) } } } client.requestLocationUpdates(request, callback, Looper.myLooper()) emitter.setCancellable { client.removeLocationUpdates(callback) } }.subscribeOn(AndroidSchedulers.mainThread())
22. Location Updates class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { . . . override fun lastKnownLocation(): Single<LocationData> = . . . @SuppressLint("MissingPermission") @MainThread override fun locationUpdates(): Observable<LocationData> = Observable.create<LocationData> { emitter -> val request = LocationRequest().apply { interval = 1_000 fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } val callback = object : LocationCallback() { override fun onLocationResult(location: LocationResult?) { location?.lastLocation?.let { emitter.onNext(it.latitude to it.longitude) } } } client.requestLocationUpdates(request, callback, Looper.myLooper()) emitter.setCancellable { client.removeLocationUpdates(callback) } }.subscribeOn(AndroidSchedulers.mainThread())
23. Location Request Priority • PRIORITY_BALANCED_POWER_ACCURACY • City block accuracy of approx 100m, • Coarse & consume less power • Likely use Wi-Fi and cell tower positioning
24. Location Request Priority (2) • PRIORITY_HIGH_ACCURACY • Most precise accuracy • Likely use GPS to determine location
25. Location Request Priority (3) • PRIORITY_LOW_POWER • City block accuracy of approx 10km • Coarse & consume less power
26. Location Request Priority (4) • PRIORITY_NO_POWER • Only receive updates other apps trigger location updates
27. Location Updates class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { . . . override fun lastKnownLocation(): Single<LocationData> = . . . @SuppressLint("MissingPermission") @MainThread override fun locationUpdates(): Observable<LocationData> = Observable.create<LocationData> { emitter -> val request = LocationRequest().apply { interval = 1_000 fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } val callback = object : LocationCallback() { override fun onLocationResult(location: LocationResult?) { location?.lastLocation?.let { emitter.onNext(it.latitude to it.longitude) } } } client.requestLocationUpdates(request, callback, Looper.myLooper()) emitter.setCancellable { client.removeLocationUpdates(callback) } }.subscribeOn(AndroidSchedulers.mainThread())
28. Location Updates class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { . . . override fun lastKnownLocation(): Single<LocationData> = . . . @SuppressLint("MissingPermission") @MainThread override fun locationUpdates(): Observable<LocationData> = Observable.create<LocationData> { emitter -> val request = LocationRequest().apply { interval = 1_000 fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } val callback = object : LocationCallback() { override fun onLocationResult(location: LocationResult?) { location?.lastLocation?.let { emitter.onNext(it.latitude to it.longitude) } } } client.requestLocationUpdates(request, callback, Looper.myLooper()) emitter.setCancellable { client.removeLocationUpdates(callback) } }.subscribeOn(AndroidSchedulers.mainThread())
29. Location Updates class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { . . . override fun lastKnownLocation(): Single<LocationData> = . . . @SuppressLint("MissingPermission") @MainThread override fun locationUpdates(): Observable<LocationData> = Observable.create<LocationData> { emitter -> val request = LocationRequest().apply { interval = 1_000 fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } val callback = object : LocationCallback() { override fun onLocationResult(location: LocationResult?) { location?.lastLocation?.let { emitter.onNext(it.latitude to it.longitude) } } } client.requestLocationUpdates(request, callback, Looper.myLooper()) emitter.setCancellable { client.removeLocationUpdates(callback) } }.subscribeOn(AndroidSchedulers.mainThread())
30. Location Updates class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { . . . override fun lastKnownLocation(): Single<LocationData> = . . . @SuppressLint("MissingPermission") @MainThread override fun locationUpdates(): Observable<LocationData> = Observable.create<LocationData> { emitter -> val request = LocationRequest().apply { interval = 1_000 fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } val callback = object : LocationCallback() { override fun onLocationResult(location: LocationResult?) { location?.lastLocation?.let { emitter.onNext(it.latitude to it.longitude) } } } client.requestLocationUpdates(request, callback, Looper.myLooper()) emitter.setCancellable { client.removeLocationUpdates(callback) } }.subscribeOn(AndroidSchedulers.mainThread())
31. Location Updates class FusedLocationWrapperImpl( private val client: FusedLocationProviderClient ) : FusedLocationWrapper { . . . override fun lastKnownLocation(): Single<LocationData> = . . . @SuppressLint("MissingPermission") @MainThread override fun locationUpdates(): Observable<LocationData> = Observable.create<LocationData> { emitter -> val request = LocationRequest().apply { interval = 1_000 fastestInterval = 500 priority = LocationRequest.PRIORITY_HIGH_ACCURACY } val callback = object : LocationCallback() { override fun onLocationResult(location: LocationResult?) { location?.lastLocation?.let { emitter.onNext(it.latitude to it.longitude) } } } client.requestLocationUpdates(request, callback, Looper.myLooper()) emitter.setCancellable { client.removeLocationUpdates(callback) } }.subscribeOn(AndroidSchedulers.mainThread())
32. How to use interface LocationGateway { fun currentLocation(): Single<LocationData> } class LocationGatewayImpl( private val fusedLocation: FusedLocationWrapper ) : LocationGateway { override fun currentLocation(): Single<LocationData> = Single.merge( fusedLocation.lastKnownLocation(), fusedLocation.locationUpdates().firstOrError() ).firstOrError() }
33. How to use interface LocationGateway { fun currentLocation(): Single<LocationData> } class LocationGatewayImpl( private val fusedLocation: FusedLocationWrapper ) : LocationGateway { override fun currentLocation(): Single<LocationData> = Single.merge( fusedLocation.lastKnownLocation(), fusedLocation.locationUpdates().firstOrError() ).firstOrError() }
34. Terima Kasih Eko Suhariyadi — @ECHOES Istantyo Triono — @E3C8408B