ViewModel.kt

 
    val whatsappRelay: BehaviorRelay<Boolean> = BehaviorRelay.create()
    val telegramRelay: BehaviorRelay<Boolean> = BehaviorRelay.create()
    val checkTextValid: BehaviorRelay<Boolean> = BehaviorRelay.create()
    val openAppIntentRelay: BehaviorRelay<Intent> = BehaviorRelay.create()
    val checkShowTextUnderSend: BehaviorRelay<Boolean> = BehaviorRelay.create()
    val messageSent: BehaviorRelay<Boolean> = BehaviorRelay.create()
 
 
 fun checkAppsInstalled() {

        val whatsappObs = Observable.just(packageManagerHelper.checkAppInstalledOrNot(whatsappPackage))
        val telegramObs = Observable.just(packageManagerHelper.checkAppInstalledOrNot(telegramPackage))

        compositeDisposables.add(
            Observable.zip(
                whatsappObs,
                telegramObs,
                BiFunction<Boolean, Boolean, Unit> { whatsApp, telegram ->
                    if (whatsApp) whatsappRelay.accept(whatsApp)
                    if (telegram) telegramRelay.accept(telegram)
                    if (whatsApp || telegram) checkShowTextUnderSend.accept(true)
                }).execute()
                .subscribe()
        )
    }
    
    fun createOpenAppIntent(packageName: String) {
        openAppIntentRelay.accept(packageManagerHelper.createOpenAppIntent(packageName))
    }
    
    fun validateText(messageText: String) {
        if (messageText.length >= 10) checkTextValid.accept(true) else checkTextValid.accept(false)
    }