Подключение QR‑код от Яндекс Пэй Android SDK

// build.gradle.kts
dependencies {
    implementation("com.yandex.pay:quickpay:LATEST_VERSION")
}

// build.gradle (Groovy DSL)
dependencies {
    implementation 'com.yandex.pay:quickpay:LATEST_VERSION'
}

android {
    defaultConfig {
        multiDexEnabled = true
    }
}
dependencies {
    implementation("androidx.multidex:multidex:2.0.1")
}

import com.yandex.pay.quickpay.api.YandexQuickPay
import com.yandex.pay.quickpay.api.QuickPayConfig
import com.yandex.pay.quickpay.api.QuickPayEnvironment
import com.yandex.pay.quickpay.api.QuickPayLocale
import com.yandex.pay.quickpay.api.QuickPayThemeColorScheme
import com.yandex.pay.quickpay.api.QuickPaymentStateListener
import com.yandex.pay.quickpay.api.QuickPayResult
import com.yandex.pay.quickpay.api.IsPaymentEnabled

class MyApp : Application() {

    val quickPayListener = object : QuickPaymentStateListener {
        override fun onPaymentEnabledStateChanged(isEnabled: IsPaymentEnabled) {}
        override fun onSessionExpired() {}
        override fun onPaymentResult(result: QuickPayResult) {}
    }

    override fun onCreate() {
        super.onCreate()

        YandexQuickPay.locale = QuickPayLocale.SYSTEM
        YandexQuickPay.theme = QuickPayThemeColorScheme.SYSTEM

        val config = QuickPayConfig(
            merchantId = "YOUR_MERCHANT_ID",
            environment = QuickPayEnvironment.SANDBOX, // SANDBOX для разработки, PRODUCTION для релиза
        )

        YandexQuickPay.initialize(
            config = config,
            context = this,
            quickPaymentStateListener = quickPayListener,
        )
    }
}

lifecycleScope.launch {
    YandexQuickPay.initUi(
        activity = this@QrActivity,
        fragmentManager = supportFragmentManager
    )
    // После initUi можно вызывать getPaymentSessionId() и enableQuickPayment()
}

<com.yandex.pay.quickpay.api.YandexPaymentMethodsWidget
    android:id="@+id/paymentMethodsWidget"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

val widget = YandexPaymentMethodsWidget(context)
widgetContainer.addView(widget)

sealed interface QrScreenState {
    object Loading : QrScreenState
    data class QrReady(val sessionId: String) : QrScreenState
    object PaymentDisabled : QrScreenState
    data class Error(val message: String) : QrScreenState
}

class QrViewModel : ViewModel() {

    private val _state = MutableStateFlow<QrScreenState>(QrScreenState.Loading)
    val state: StateFlow<QrScreenState> = _state.asStateFlow()

    val quickPayListener = object : QuickPaymentStateListener {
        override fun onPaymentEnabledStateChanged(isEnabled: IsPaymentEnabled) {
            if (isEnabled.value) refreshSession() else _state.value = QrScreenState.PaymentDisabled
        }
        override fun onSessionExpired() { refreshSession() }
        override fun onPaymentResult(result: QuickPayResult) { refreshSession() }
    }

    fun init() {
        viewModelScope.launch {
            val isEnabled = runCatching { YandexQuickPay.isQuickPaymentEnabled() }
                .getOrDefault(IsPaymentEnabled(false))
            if (isEnabled.value) refreshSession() else _state.value = QrScreenState.PaymentDisabled
        }
    }

    fun refreshSession() {
        viewModelScope.launch {
            _state.value = QrScreenState.Loading
            runCatching { YandexQuickPay.getPaymentSessionId() }
                .onSuccess { _state.value = QrScreenState.QrReady(it) }
                .onFailure { _state.value = QrScreenState.Error(it.message ?: "Неизвестная ошибка") }
        }
    }

    fun enableQuickPayment() {
        viewModelScope.launch { YandexQuickPay.enableQuickPayment().onFailure { /* ... */ } }
    }

    fun disableQuickPayment() {
        viewModelScope.launch { YandexQuickPay.disableQuickPayment().onFailure { /* ... */ } }
    }
}

class QrActivity : AppCompatActivity() {
    private val viewModel: QrViewModel by viewModels()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_qr)

        // Передаём листенер из ViewModel в SDK
        YandexQuickPay.initialize(
            config = QuickPayConfig(merchantId = "YOUR_MERCHANT_ID", environment = QuickPayEnvironment.SANDBOX),
            context = application,
            quickPaymentStateListener = viewModel.quickPayListener,
        )

        lifecycleScope.launch {
            YandexQuickPay.initUi(this@QrActivity, supportFragmentManager)
            viewModel.init()
        }

        lifecycleScope.launch {
            viewModel.state.collect { state ->
                when (state) {
                    is QrScreenState.Loading -> showLoading()
                    is QrScreenState.QrReady -> showQr(state.sessionId)
                    is QrScreenState.PaymentDisabled -> showEnableButton()
                    is QrScreenState.Error -> showError(state.message)
                }
            }
        }
    }
}

viewModelScope.launch {
    runCatching { YandexQuickPay.getPaymentSessionId() }
        .onSuccess { sessionId ->
            val bitmap = generateQrBitmap(sessionId)
            qrImageView.setImageBitmap(bitmap)
        }
        .onFailure { error ->
            Log.e("QuickPay", "Ошибка получения сессии: ${error.message}", error)
        }
}