Small library that wraps Google Play Services API in brilliant RxJava
Observables reducing boilerplate to minimum.
This version works with Google Play Services 11+ and RxJava 2.+
Artifact name: android-reactive-location2
RxJava1 version:
Artifact name: android-reactive-location
- easily connect to Play Services API
- obtain last known location
- subscribe for location updates
- use location settings API
- manage geofences
- geocode location to list of addresses
- activity recognition
- use current place API
- fetch place autocomplete suggestions
Simple. All you need is to create ReactiveLocationProvider using your context.
All observables are already there. Examples are worth more than 1000 words:
ReactiveLocationProvider locationProvider = new ReactiveLocationProvider(context);
locationProvider.getLastKnownLocation()
.subscribe(new Consumer<Location>() {
@Override
public void call(Location location) {
doSthImportantWithObtainedLocation(location);
}
});Yep, Java 8 is not there yet (and on Android it will take a while) but there is absolutely no Google Play Services LocationClient callbacks hell and there is no clean-up you have to do.
LocationRequest request = LocationRequest.create() //standard GMS LocationRequest
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setNumUpdates(5)
.setInterval(100);
ReactiveLocationProvider locationProvider = new ReactiveLocationProvider(context);
Subscription subscription = locationProvider.getUpdatedLocation(request)
.filter(...) // you can filter location updates
.map(...) // you can map location to sth different
.flatMap(...) // or event flat map
... // and do everything else that is provided by RxJava
.subscribe(new Consumer<Location>() {
@Override
public void call(Location location) {
doSthImportantWithObtainedLocation(location);
}
});When you are done (for example in onStop()) remember to unsubscribe.
subscription.unsubscribe();Getting activity recognition is just as simple
ReactiveLocationProvider locationProvider = new ReactiveLocationProvider(context);
Subscription subscription = locationProvider.getDetectedActivity(0) // detectionIntervalMillis
.filter(...) // you can filter location updates
.map(...) // you can map location to sth different
.flatMap(...) // or event flat map
... // and do everything else that is provided by RxJava
.subscribe(new Consumer<ActivityRecognitionResult>() {
@Override
public void call(ActivityRecognitionResult detectedActivity) {
doSthImportantWithObtainedActivity(detectedActivity);
}
});Do you need address for location?
Observable<List<Address>> reverseGeocodeObservable = locationProvider
.getReverseGeocodeObservable(location.getLatitude(), location.getLongitude(), MAX_ADDRESSES);
reverseGeocodeObservable
.subscribeOn(Schedulers.io()) // use I/O thread to query for addresses
.observeOn(AndroidSchedulers.mainThread()) // return result in main android thread to manipulate UI
.subscribe(...);Do you need address for a text search query?
Observable<List<Address>> geocodeObservable = locationProvider
.getGeocodeObservable(String userQuery, MAX_ADDRESSES);
geocodeObservable
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(...);For geofence management use addGeofences and removeGeofences methods.
To get LocationSettingsResponse for your LocationRequest check
out ReactiveLocationProvider.checkLocationSettings() method. Sample
usage can be found in sample project in MainActivity class.
If you just need managed connection to Play Services API
use ReactiveLocationProvider.getGoogleApiClientObservable().
On subscription it will connect to the API.
Unsubscription will close the connection.
If you are manually using Google Play Services and you are dealing with
PendingResult you can easily transform them to observables with
ReactiveLocationProvider.fromPendingResult() method.
To transform any buffer to observable and autorelease it on unsubscription
use DataBufferObservable.from() method. It will let you easily flatMap
such data as PlaceLikelihoodBuffer or AutocompletePredictionBuffer
from Places API. For usage example see PlacesActivity sample.
You can fetch current place or place suggestions using:
ReactiveLocationProvider.getCurrentPlace()ReactiveLocationProvider.getPlaceAutocompletePredictions()ReactiveLocationProvider.getPlaceById()
For more info see sample project and PlacesActivity.
Do you need location with certain accuracy but don't want to wait for it more than 4 sec? No problem.
LocationRequest req = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setExpirationDuration(TimeUnit.SECONDS.toMillis(LOCATION_TIMEOUT_IN_SECONDS))
.setInterval(LOCATION_UPDATE_INTERVAL);
Observable<Location> goodEnoughQuicklyOrNothingObservable = locationProvider.getUpdatedLocation(req)
.filter(new Func1<Location, Boolean>() {
@Override
public Boolean call(Location location) {
return location.getAccuracy() < SUFFICIENT_ACCURACY;
}
})
.timeout(LOCATION_TIMEOUT_IN_SECONDS, TimeUnit.SECONDS, Observable.just((Location) null), AndroidSchedulers.mainThread())
.first()
.observeOn(AndroidSchedulers.mainThread());
goodEnoughQuicklyOrNothingObservable.subscribe(...);Library is available in maven central.
Just use it as dependency in your build.gradle file along with Google Play Services and RxJava.
dependencies {
...
compile 'pl.charmas.android:android-reactive-location2:2.1@aar'
compile 'com.google.android.gms:play-services-location:11.0.4' //you can use newer GMS version if you need
compile 'com.google.android.gms:play-services-places:11.0.4'
compile 'io.reactivex:rxjava:2.0.5' //you can override RxJava version if you need
}Ensure you have android-maven-plugin version that support aar archives and add following dependency:
<dependency>
<groupId>pl.charmas.android</groupId>
<artifactId>android-reactive-location2</artifactId>
<version>2.1</version>
<type>aar</type>
</dependency>It may be necessary to add google play services and rxanroid dependency as well.
Sample usage is available in sample directory.
Places API requires API Key. Before running samples you need to create project on API console
and obtain API Key using this guide.
Obtained key should be exported as gradle property named: REACTIVE_LOCATION_GMS_API_KEY for
example in ~/.gradle/gradle.properties.
If you need Google Fit library rxified please take a look at RxFit.
Copyright (C) 2015 Michał Charmas (http://blog.charmas.pl)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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