RxBottomSheetBehavior

README.md

RxBottomSheetBehavior

If yout want to get BottomSheet state via rx, you should use this

RxBottomSheetBehavior.kt

package xyz.kettsun.sample.widget

import android.support.design.widget.BottomSheetBehavior
import android.view.View
import io.reactivex.subjects.BehaviorSubject

class RxBottomSheetBehavior<V: View>(behavior: BottomSheetBehavior<V>) {

    companion object {
        fun <V: View>from(view :V): RxBottomSheetBehavior<V> {
            val original = BottomSheetBehavior.from(view)
            return RxBottomSheetBehavior(original)
        }
    }

    private val originalCallback = object : BottomSheetBehavior.BottomSheetCallback() {
        override fun onSlide(bottomSheet: View, slideOffset: Float) {
            //no-op
        }

        override fun onStateChanged(bottomSheet: View, newState: Int) {
            state.onNext(newState)
        }
    }

    val state: BehaviorSubject<Int> = BehaviorSubject.createDefault(BottomSheetBehavior.STATE_COLLAPSED)

    init {
        behavior.setBottomSheetCallback(originalCallback)
    }
}