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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Well, as mentioned in the RxAndroid's Readme, it's only Android extensions to RxJava. It makes it easy to subscribe or observe on the main thread or a specific looper. So just focusing on learning RxJava should be enough. You can find many resources for that, here is a compilation: http://reactivex.io/tutorials.html
NOTE:
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