https://github.com/ramzijabali/learning-rxkotlin

Cook book for RXKtolin
https://github.com/ramzijabali/learning-rxkotlin

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Cook book for RXKtolin

• Host: GitHub
• URL: https://github.com/ramzijabali/learning-rxkotlin
• Owner: RamziJabali
• Created: 2021-07-09T23:25:46.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-07-10T22:18:12.000Z (over 3 years ago)
• Last Synced: 2023-08-01T22:48:45.483Z (over 1 year ago)
• Size: 5.86 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# learning-rxKotlin

Cook book for RXKotlin

## Creating a single Observable

If you have a List of items that you want use you can use a for each loop in the `onNext()` or you can use `just()` which acomodates for collection.

```

var stringy = "Hi"

        var x: Observable = Observable.create(ObservableOnSubscribe { emitter ->  //Lambda

            if(!emitter.isDisposed){

                emitter.onNext(stringy)

                emitter.onComplete()

            }

        })

                .subscribeOn(Schedulers.io())

                .observeOn(AndroidSchedulers.mainThread())

        x.subscribe(object : Observer {

            override fun onSubscribe(d: Disposable?) {

            }

            override fun onNext(t: String?) {

                Log.d(TAG, "onNext: $t")

            }

            override fun onError(e: Throwable?) {

                Log.d(TAG, "onError: ${e.toString()}")

            }

            override fun onComplete() {

                Log.d(TAG, "Complete")

            }

        })

        

```

## Creating an instance of retro fit 

### This allows us to convert a retrofit Call object to a Observable or a Flowable

```

 retrofit = Retrofit.Builder()

                .baseUrl(API_BASE_URL)

                .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) 

                .addConverterFactory(GsonConverterFactory.create())

                .build()

```

## Creating our Json place holder API

### Retrofit fills out the methods in the interface for us

```

jsonWeatherAPI = retrofit.create(JsonWeatherAPI::class.java)

```

## API Endpoint manager

```

@GET("/api/location/{whereOnEarthId}")

    fun getWeatherForWhereOnEarthId(@Path("whereOnEarthId") whereOnEarthId: Int): Flowable

```

## Making the call and setting our Views

```

jsonWeatherAPI.getWeatherForWhereOnEarthId(44418)

                .toObservable()

                .subscribeOn(Schedulers.io())

                .observeOn(AndroidSchedulers.mainThread())

                .subscribe { weatherForLocation ->

                    cityTextView.text = weatherForLocation.cityTitle

                    stateTextView.text = weatherForLocation.parentRegion.title

                    temperatureTextView.text = weatherForLocation.consolidatedWeather[0].theTemp.toString()

                    pressureValueTextView.text = weatherForLocation.consolidatedWeather[0].airPressure.toString()

                    humidityValueTextView.text = weatherForLocation.consolidatedWeather[0].humidity.toString()

                    windSpeedValueTextView.text = weatherForLocation.consolidatedWeather[0].windSpeed.toString()

                }

```