Android Mobile Features Kotlin Samples

// Android Kotlin Device Information Examples
// Using android.os.Build, android.util.DisplayMetrics, and Context

import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.net.ConnectivityManager
import android.net.Network
import android.net.NetworkCapabilities
import android.net.NetworkInfo
import android.net.NetworkRequest
import android.os.Build
import android.os.BatteryManager
import android.os.Environment
import android.os.VibrationEffect
import android.os.Vibrator
import android.os.VibratorManager
import android.util.DisplayMetrics
import android.view.WindowManager
import android.provider.Settings
import android.telephony.TelephonyManager
import android.annotation.SuppressLint
import java.io.File

// 1. Basic Device Information
class DeviceInfo(private val context: Context) {

    // Get device manufacturer
    fun getManufacturer(): String {
        return Build.MANUFACTURER
    }

    // Get device model
    fun getModel(): String {
        return Build.MODEL
    }

    // Get device name (manufacturer + model)
    fun getDeviceName(): String {
        return "${Build.MANUFACTURER} ${Build.MODEL}"
    }

    // Get Android version
    fun getAndroidVersion(): String {
        return "Android ${Build.VERSION.RELEASE} (API ${Build.VERSION.SDK_INT})"
    }

    // Get build version information
    fun getBuildInfo(): String {
        return """
            Build ID: ${Build.DISPLAY}
            Build Date: ${Build.TIME}
            Build Type: ${Build.TYPE}
            Build Tags: ${Build.TAGS}
        """.trimIndent()
    }

    // Get device brand
    fun getBrand(): String {
        return Build.BRAND
    }

    // Get device product name
    fun getProduct(): String {
        return Build.PRODUCT
    }

    // Get device hardware name
    fun getHardware(): String {
        return Build.HARDWARE
    }

    // Get device serial number (requires permission)
    fun getSerialNumber(): String {
        return try {
            Build.getSerial()
        } catch (e: SecurityException) {
            "Permission denied"
        }
    }

    // Get bootloader version
    fun getBootloader(): String {
        return Build.BOOTLOADER
    }

    // Get device board
    fun getBoard(): String {
        return Build.BOARD
    }

    // Get device fingerprint
    fun getFingerprint(): String {
        return Build.FINGERPRINT
    }
}

// 2. Screen Information
class ScreenInfo(private val context: Context) {

    // Get screen dimensions in pixels
    fun getScreenSize(): Pair<Int, Int> {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val displayMetrics = DisplayMetrics()
        windowManager.defaultDisplay.getMetrics(displayMetrics)
        return Pair(displayMetrics.widthPixels, displayMetrics.heightPixels)
    }

    // Get screen density
    fun getScreenDensity(): Float {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val displayMetrics = DisplayMetrics()
        windowManager.defaultDisplay.getMetrics(displayMetrics)
        return displayMetrics.density
    }

    // Get screen density DPI
    fun getScreenDensityDpi(): Int {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val displayMetrics = DisplayMetrics()
        windowManager.defaultDisplay.getMetrics(displayMetrics)
        return displayMetrics.densityDpi
    }

    // Get screen size category (small, normal, large, xlarge)
    fun getScreenSizeCategory(): String {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val displayMetrics = DisplayMetrics()
        windowManager.defaultDisplay.getMetrics(displayMetrics)
        val screenSize = displayMetrics.widthPixels.toFloat() * displayMetrics.heightPixels.toFloat() / (displayMetrics.density * displayMetrics.density)

        return when {
            screenSize < 300_000 -> "small"
            screenSize < 500_000 -> "normal"
            screenSize < 700_000 -> "large"
            else -> "xlarge"
        }
    }

    // Get screen orientation
    fun getScreenOrientation(): String {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val rotation = windowManager.defaultDisplay.rotation
        return when (rotation) {
            0 -> "portrait"
            1 -> "landscape"
            2 -> "reverse portrait"
            3 -> "reverse landscape"
            else -> "unknown"
        }
    }

    // Get real screen size (including decorations)
    fun getRealScreenSize(): Pair<Int, Int> {
        val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
        val displayMetrics = DisplayMetrics()
        windowManager.defaultDisplay.getRealMetrics(displayMetrics)
        return Pair(displayMetrics.widthPixels, displayMetrics.heightPixels)
    }
}

// 3. Device Identifiers
class DeviceIdentifiers(private val context: Context) {

    // Get Android ID
    fun getAndroidId(): String {
        return Settings.Secure.getString(
            context.contentResolver,
            Settings.Secure.ANDROID_ID
        )
    }

    // Get unique ID (custom implementation)
    fun getUniqueId(): String {
        val androidId = Settings.Secure.getString(
            context.contentResolver,
            Settings.Secure.ANDROID_ID
        )
        return if (androidId != null && androidId != "9774d56d682e549c") {
            androidId
        } else {
            Build.SERIAL
        }
    }

    // Get installation ID
    fun getInstallationId(): String {
        return try {
            val file = File(context.filesDir, "installation_id")
            if (!file.exists()) {
                file.writeText("${System.currentTimeMillis()}-${Build.SERIAL}")
            }
            file.readText()
        } catch (e: Exception) {
            "unknown"
        }
    }
}

// 4. System Information
class SystemInfo(private val context: Context) {

    // Get available memory
    fun getAvailableMemory(): Long {
        val activityManager = context.getSystemService(Context.ACTIVITY_SERVICE) as android.app.ActivityManager
        val memoryInfo = android.app.ActivityManager.MemoryInfo()
        activityManager.getMemoryInfo(memoryInfo)
        return memoryInfo.availMem
    }

    // Get total memory
    fun getTotalMemory(): Long {
        val activityManager = context.getSystemService(Context.ACTIVITY_SERVICE) as android.app.ActivityManager
        val memoryInfo = android.app.ActivityManager.MemoryInfo()
        activityManager.getMemoryInfo(memoryInfo)
        return memoryInfo.totalMem
    }

    // Get low memory threshold
    fun getLowMemoryThreshold(): Long {
        val activityManager = context.getSystemService(Context.ACTIVITY_SERVICE) as android.app.ActivityManager
        val memoryInfo = android.app.ActivityManager.MemoryInfo()
        activityManager.getMemoryInfo(memoryInfo)
        return memoryInfo.threshold
    }

    // Check if device is low on memory
    fun isLowMemory(): Boolean {
        val activityManager = context.getSystemService(Context.ACTIVITY_SERVICE) as android.app.ActivityManager
        val memoryInfo = android.app.ActivityManager.MemoryInfo()
        activityManager.getMemoryInfo(memoryInfo)
        return memoryInfo.lowMemory
    }

    // Get number of CPU cores
    fun getCpuCores(): Int {
        return Runtime.getRuntime().availableProcessors()
    }

    // Get available internal storage
    fun getAvailableInternalStorage(): Long {
        val stat = android.os.StatFs(Environment.getDataDirectory().path)
        return stat.availableBlocksLong * stat.blockSizeLong
    }

    // Get total internal storage
    fun getTotalInternalStorage(): Long {
        val stat = android.os.StatFs(Environment.getDataDirectory().path)
        return stat.blockCountLong * stat.blockSizeLong
    }
}

// 5. Battery Information
class BatteryInfo(private val context: Context) {

    // Get battery level percentage
    fun getBatteryLevel(): Int {
        val batteryStatus: Intent? = IntentFilter(Intent.ACTION_BATTERY_CHANGED).let { ifilter ->
            context.registerReceiver(null, ifilter)
        }

        val level: Int = batteryStatus?.getIntExtra(BatteryManager.EXTRA_LEVEL, -1) ?: -1
        val scale: Int = batteryStatus?.getIntExtra(BatteryManager.EXTRA_SCALE, -1) ?: -1

        return if (level != -1 && scale != -1) {
            (level * 100) / scale
        } else {
            -1
        }
    }

    // Check if device is charging
    fun isCharging(): Boolean {
        val batteryStatus: Intent? = IntentFilter(Intent.ACTION_BATTERY_CHANGED).let { ifilter ->
            context.registerReceiver(null, ifilter)
        }

        val status: Int = batteryStatus?.getIntExtra(BatteryManager.EXTRA_STATUS, -1) ?: -1
        return status == BatteryManager.BATTERY_STATUS_CHARGING ||
               status == BatteryManager.BATTERY_STATUS_FULL
    }

    // Get charging status
    fun getChargingStatus(): String {
        val batteryStatus: Intent? = IntentFilter(Intent.ACTION_BATTERY_CHANGED).let { ifilter ->
            context.registerReceiver(null, ifilter)
        }

        val status: Int = batteryStatus?.getIntExtra(BatteryManager.EXTRA_STATUS, -1) ?: -1
        return when (status) {
            BatteryManager.BATTERY_STATUS_CHARGING -> "charging"
            BatteryManager.BATTERY_STATUS_DISCHARGING -> "discharging"
            BatteryManager.BATTERY_STATUS_FULL -> "full"
            BatteryManager.BATTERY_STATUS_NOT_CHARGING -> "not charging"
            BatteryManager.BATTERY_STATUS_UNKNOWN -> "unknown"
            else -> "unknown"
        }
    }

    // Get battery health
    fun getBatteryHealth(): String {
        val batteryStatus: Intent? = IntentFilter(Intent.ACTION_BATTERY_CHANGED).let { ifilter ->
            context.registerReceiver(null, ifilter)
        }

        val health: Int = batteryStatus?.getIntExtra(BatteryManager.EXTRA_HEALTH, -1) ?: -1
        return when (health) {
            BatteryManager.BATTERY_HEALTH_GOOD -> "good"
            BatteryManager.BATTERY_HEALTH_OVERHEAT -> "overheat"
            BatteryManager.BATTERY_HEALTH_DEAD -> "dead"
            BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE -> "over voltage"
            BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE -> "failure"
            BatteryManager.BATTERY_HEALTH_COLD -> "cold"
            else -> "unknown"
        }
    }
}

// 6. Telephony Information
class TelephonyInfo(private val context: Context) {

    private val telephonyManager = context.getSystemService(Context.TELEPHONY_SERVICE) as android.telephony.TelephonyManager

    // Get SIM operator name
    fun getSimOperatorName(): String {
        return try {
            telephonyManager.simOperatorName ?: "unknown"
        } catch (e: SecurityException) {
            "Permission denied"
        }
    }

    // Get network operator name
    fun getNetworkOperatorName(): String {
        return try {
            telephonyManager.networkOperatorName ?: "unknown"
        } catch (e: SecurityException) {
            "Permission denied"
        }
    }

    // Get network type
    fun getNetworkType(): String {
        return try {
            when (telephonyManager.networkType) {
                TelephonyManager.NETWORK_TYPE_GPRS -> "GPRS"
                TelephonyManager.NETWORK_TYPE_EDGE -> "EDGE"
                TelephonyManager.NETWORK_TYPE_UMTS -> "UMTS"
                TelephonyManager.NETWORK_TYPE_LTE -> "LTE"
                TelephonyManager.NETWORK_TYPE_5G_NR -> "5G"
                else -> "unknown"
            }
        } catch (e: SecurityException) {
            "Permission denied"
        }
    }

    // Get phone type
    fun getPhoneType(): String {
        return try {
            when (telephonyManager.phoneType) {
                TelephonyManager.PHONE_TYPE_NONE -> "none"
                TelephonyManager.PHONE_TYPE_GSM -> "GSM"
                TelephonyManager.PHONE_TYPE_CDMA -> "CDMA"
                TelephonyManager.PHONE_TYPE_SIP -> "SIP"
                else -> "unknown"
            }
        } catch (e: SecurityException) {
            "Permission denied"
        }
    }

    // Get SIM serial number
    fun getSimSerialNumber(): String {
        return try {
            telephonyManager.simSerialNumber ?: "unknown"
        } catch (e: SecurityException) {
            "Permission denied"
        }
    }

    // Check if SIM is ready
    fun isSimReady(): Boolean {
        return try {
            telephonyManager.simState == TelephonyManager.SIM_STATE_READY
        } catch (e: SecurityException) {
            false
        }
    }
}

// Main demonstration
fun demonstrateDeviceInformation(context: Context) {
    println("=== Android Kotlin Device Information Examples ===\n")

    // 1. Basic device info
    println("--- 1. Basic Device Information ---")
    val deviceInfo = DeviceInfo(context)
    println("Manufacturer: ${deviceInfo.getManufacturer()}")
    println("Model: ${deviceInfo.getModel()}")
    println("Device Name: ${deviceInfo.getDeviceName()}")
    println("Android Version: ${deviceInfo.getAndroidVersion()}")
    println("Brand: ${deviceInfo.getBrand()}")
    println("Product: ${deviceInfo.getProduct()}")
    println("Hardware: ${deviceInfo.getHardware()}")

    // 2. Screen information
    println("\n--- 2. Screen Information ---")
    val screenInfo = ScreenInfo(context)
    val (width, height) = screenInfo.getScreenSize()
    println("Screen Size: ${width}x${height}")
    println("Screen Density: ${screenInfo.getScreenDensity()}")
    println("Screen DPI: ${screenInfo.getScreenDensityDpi()}")
    println("Screen Size Category: ${screenInfo.getScreenSizeCategory()}")
    println("Screen Orientation: ${screenInfo.getScreenOrientation()}")

    // 3. Device identifiers
    println("\n--- 3. Device Identifiers ---")
    val deviceIds = DeviceIdentifiers(context)
    println("Android ID: ${deviceIds.getAndroidId()}")
    println("Unique ID: ${deviceIds.getUniqueId()}")
    println("Installation ID: ${deviceIds.getInstallationId()}")

    // 4. System information
    println("\n--- 4. System Information ---")
    val systemInfo = SystemInfo(context)
    println("Available Memory: ${systemInfo.getAvailableMemory() / (1024 * 1024)} MB")
    println("Total Memory: ${systemInfo.getTotalMemory() / (1024 * 1024)} MB")
    println("CPU Cores: ${systemInfo.getCpuCores()}")
    println("Low Memory: ${systemInfo.isLowMemory()}")
    println("Available Storage: ${systemInfo.getAvailableInternalStorage() / (1024 * 1024 * 1024)} GB")
    println("Total Storage: ${systemInfo.getTotalInternalStorage() / (1024 * 1024 * 1024)} GB")

    // 5. Battery information
    println("\n--- 5. Battery Information ---")
    val batteryInfo = BatteryInfo(context)
    println("Battery Level: ${batteryInfo.getBatteryLevel()}%")
    println("Is Charging: ${batteryInfo.isCharging()}")
    println("Charging Status: ${batteryInfo.getChargingStatus()}")
    println("Battery Health: ${batteryInfo.getBatteryHealth()}")

    // 6. Telephony information
    println("\n--- 6. Telephony Information ---")
    val telephonyInfo = TelephonyInfo(context)
    println("SIM Operator: ${telephonyInfo.getSimOperatorName()}")
    println("Network Operator: ${telephonyInfo.getNetworkOperatorName()}")
    println("Network Type: ${telephonyInfo.getNetworkType()}")
    println("Phone Type: ${telephonyInfo.getPhoneType()}")
    println("SIM Ready: ${telephonyInfo.isSimReady()}")

    println("\n=== All Device Information Examples Completed ===")
}

// Android Kotlin Network Status Examples
// Using android.net.ConnectivityManager, NetworkInfo, and NetworkRequest

// 1. Basic Network Connectivity
class NetworkConnectivity(private val context: Context) {

    private val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

    // Check if network is available
    fun isNetworkAvailable(): Boolean {
        val networkInfo = connectivityManager.activeNetworkInfo
        return networkInfo != null && networkInfo.isConnected
    }

    // Check if WiFi is connected
    fun isWifiConnected(): Boolean {
        val networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
        return networkInfo?.isConnected == true
    }

    // Check if mobile network is connected
    fun isMobileConnected(): Boolean {
        val networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
        return networkInfo?.isConnected == true
    }

    // Check if device is roaming
    fun isRoaming(): Boolean {
        val networkInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
        return networkInfo?.isRoaming == true
    }
}

// 2. Network Type Detection (API 21+)
class NetworkTypeDetector(private val context: Context) {

    private val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

    // Get network type (WiFi, Mobile, Ethernet, etc.)
    fun getNetworkType(): String {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = connectivityManager.activeNetwork ?: return "none"
            val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return "unknown"

            return when {
                capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> "wifi"
                capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> "cellular"
                capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) -> "ethernet"
                capabilities.hasTransport(NetworkCapabilities.TRANSPORT_BLUETOOTH) -> "bluetooth"
                capabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN) -> "vpn"
                else -> "unknown"
            }
        } else {
            @Suppress("DEPRECATION")
            val networkInfo = connectivityManager.activeNetworkInfo
            return when (networkInfo?.type) {
                ConnectivityManager.TYPE_WIFI -> "wifi"
                ConnectivityManager.TYPE_MOBILE -> "cellular"
                ConnectivityManager.TYPE_ETHERNET -> "ethernet"
                ConnectivityManager.TYPE_BLUETOOTH -> "bluetooth"
                ConnectivityManager.TYPE_VPN -> "vpn"
                else -> "unknown"
            }
        }
    }

    // Check if network is metered
    fun isMeteredNetwork(): Boolean {
        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = connectivityManager.activeNetwork ?: return false
            connectivityManager.isActiveNetworkMetered(network)
        } else {
            connectivityManager.isActiveNetworkMetered
        }
    }

    // Check if network is high bandwidth
    fun isHighBandwidth(): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = connectivityManager.activeNetwork ?: return false
            val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
            return capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED) ||
                   capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING)
        }
        return false
    }

    // Get connection speed
    fun getConnectionSpeed(): String {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = connectivityManager.activeNetwork ?: return "unknown"
            val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return "unknown"
            val downBandwidth = capabilities.linkDownstreamBandwidthKbps
            val upBandwidth = capabilities.linkUpstreamBandwidthKbps
            return "Down: ${downBandwidth}Kbps, Up: ${upBandwidth}Kbps"
        }
        return "unknown"
    }
}

// 3. Mobile Network Details
class MobileNetworkDetails(private val context: Context) {

    private val telephonyManager = context.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager

    // Get mobile network type (2G, 3G, 4G, 5G)
    fun getMobileNetworkType(): String {
        return try {
            when (telephonyManager.networkType) {
                TelephonyManager.NETWORK_TYPE_GPRS, TelephonyManager.NETWORK_TYPE_EDGE,
                TelephonyManager.NETWORK_TYPE_CDMA, TelephonyManager.NETWORK_TYPE_1xRTT,
                TelephonyManager.NETWORK_TYPE_IDEN -> "2G"
                TelephonyManager.NETWORK_TYPE_UMTS, TelephonyManager.NETWORK_TYPE_EVDO_0,
                TelephonyManager.NETWORK_TYPE_EVDO_A, TelephonyManager.NETWORK_TYPE_HSDPA,
                TelephonyManager.NETWORK_TYPE_HSUPA, TelephonyManager.NETWORK_TYPE_HSPA,
                TelephonyManager.NETWORK_TYPE_EVDO_B, TelephonyManager.NETWORK_TYPE_EHRPD,
                TelephonyManager.NETWORK_TYPE_HSPAP -> "3G"
                TelephonyManager.NETWORK_TYPE_LTE -> "4G"
                TelephonyManager.NETWORK_TYPE_NR -> "5G"
                TelephonyManager.NETWORK_TYPE_UNKNOWN -> "unknown"
                else -> "unknown"
            }
        } catch (e: SecurityException) {
            "permission denied"
        }
    }

    // Get data state
    fun getDataState(): String {
        return try {
            when (telephonyManager.dataState) {
                TelephonyManager.DATA_DISCONNECTED -> "disconnected"
                TelephonyManager.DATA_CONNECTING -> "connecting"
                TelephonyManager.DATA_CONNECTED -> "connected"
                TelephonyManager.DATA_SUSPENDED -> "suspended"
                else -> "unknown"
            }
        } catch (e: SecurityException) {
            "permission denied"
        }
    }

    // Get SIM state
    fun getSimState(): String {
        return try {
            when (telephonyManager.simState) {
                TelephonyManager.SIM_STATE_ABSENT -> "absent"
                TelephonyManager.SIM_STATE_NETWORK_LOCKED -> "network locked"
                TelephonyManager.SIM_STATE_PIN_REQUIRED -> "pin required"
                TelephonyManager.SIM_STATE_PUK_REQUIRED -> "puk required"
                TelephonyManager.SIM_STATE_READY -> "ready"
                TelephonyManager.SIM_STATE_UNKNOWN -> "unknown"
                else -> "unknown"
            }
        } catch (e: SecurityException) {
            "permission denied"
        }
    }
}

// 4. Network Capabilities Checker (API 21+)
class NetworkCapabilitiesChecker(private val context: Context) {

    private val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

    // Check if network is validated (has internet access)
    fun hasInternetAccess(): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = connectivityManager.activeNetwork ?: return false
            val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
            return capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) &&
                   capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)
        }
        return connectivityManager.activeNetworkInfo?.isConnected == true
    }

    // Check if network supports VPN
    fun supportsVPN(): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = connectivityManager.activeNetwork ?: return false
            val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
            return capabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN)
        }
        return false
    }

    // Check if network is congested
    fun isNetworkCongested(): Boolean {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = connectivityManager.activeNetwork ?: return false
            val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
            return !capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED)
        }
        return false
    }
}

// 5. Network State Listener
class NetworkStateListener(private val context: Context) {

    private val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
    private var networkCallback: ConnectivityManager.NetworkCallback? = null

    // Start monitoring network changes
    fun startNetworkMonitoring(onNetworkChanged: (Boolean, String) -> Unit) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            val request = NetworkRequest.Builder()
                .build()

            networkCallback = object : ConnectivityManager.NetworkCallback() {
                override fun onAvailable(network: Network) {
                    val capabilities = connectivityManager.getNetworkCapabilities(network)
                    val type = when {
                        capabilities?.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) == true -> "wifi"
                        capabilities?.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) == true -> "cellular"
                        capabilities?.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) == true -> "ethernet"
                        else -> "unknown"
                    }
                    onNetworkChanged(true, type)
                }

                override fun onLost(network: Network) {
                    onNetworkChanged(false, "none")
                }
            }

            connectivityManager.registerDefaultNetworkCallback(networkCallback as ConnectivityManager.NetworkCallback)
        }
    }

    // Stop monitoring network changes
    fun stopNetworkMonitoring() {
        networkCallback?.let {
            connectivityManager.unregisterNetworkCallback(it)
        }
        networkCallback = null
    }
}

// 6. Network Quality Estimator
class NetworkQualityEstimator(private val context: Context) {

    // Estimate network quality based on type and bandwidth
    fun estimateNetworkQuality(): String {
        val detector = NetworkTypeDetector(context)
        val type = detector.getNetworkType()
        val bandwidth = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val network = (context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager).activeNetwork
            val capabilities = network?.let {
                (context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager).getNetworkCapabilities(it)
            }
            capabilities?.linkDownstreamBandwidthKbps ?: 0
        } else {
            0
        }

        return when {
            type == "wifi" && bandwidth > 10_000 -> "excellent"
            type == "wifi" -> "good"
            type == "cellular" -> {
                val mobileType = MobileNetworkDetails(context).getMobileNetworkType()
                when (mobileType) {
                    "5G", "4G" -> "good"
                    "3G" -> "fair"
                    else -> "poor"
                }
            }
            type == "ethernet" -> "excellent"
            else -> "unknown"
        }
    }

    // Get recommended action based on quality
    fun getRecommendedAction(): String {
        val quality = estimateNetworkQuality()
        return when (quality) {
            "excellent" -> "Can stream HD video and download large files"
            "good" -> "Can stream video and download files"
            "fair" -> "Suitable for browsing and light streaming"
            "poor" -> "Only basic browsing recommended"
            else -> "Network not available"
        }
    }
}

// 7. Network Utils
class NetworkUtils(private val context: Context) {

    // Check if should use WiFi for large downloads
    fun shouldUseWifiForDownload(): Boolean {
        val detector = NetworkTypeDetector(context)
        return detector.isMeteredNetwork().not() && detector.getNetworkType() == "wifi"
    }

    // Check if can make network request
    fun canMakeRequest(): Boolean {
        val connectivity = NetworkConnectivity(context)
        return connectivity.isNetworkAvailable()
    }

    // Get network info summary
    fun getNetworkSummary(): Map<String, Any> {
        val connectivity = NetworkConnectivity(context)
        val detector = NetworkTypeDetector(context)
        val quality = NetworkQualityEstimator(context)

        return mapOf(
            "available" to connectivity.isNetworkAvailable(),
            "type" to detector.getNetworkType(),
            "metered" to detector.isMeteredNetwork(),
            "quality" to quality.estimateNetworkQuality(),
            "wifi" to connectivity.isWifiConnected(),
            "mobile" to connectivity.isMobileConnected()
        )
    }
}

// Main demonstration
fun demonstrateNetworkStatus(context: Context) {
    println("=== Android Kotlin Network Status Examples ===\n")

    // 1. Basic connectivity
    println("--- 1. Basic Network Connectivity ---")
    val connectivity = NetworkConnectivity(context)
    println("Network Available: ${connectivity.isNetworkAvailable()}")
    println("WiFi Connected: ${connectivity.isWifiConnected()}")
    println("Mobile Connected: ${connectivity.isMobileConnected()}")
    println("Is Roaming: ${connectivity.isRoaming()}")

    // 2. Network type
    println("\n--- 2. Network Type Detection ---")
    val typeDetector = NetworkTypeDetector(context)
    println("Network Type: ${typeDetector.getNetworkType()}")
    println("Is Metered: ${typeDetector.isMeteredNetwork()}")
    println("Is High Bandwidth: ${typeDetector.isHighBandwidth()}")
    println("Connection Speed: ${typeDetector.getConnectionSpeed()}")

    // 3. Mobile network details
    println("\n--- 3. Mobile Network Details ---")
    val mobileDetails = MobileNetworkDetails(context)
    println("Mobile Network Type: ${mobileDetails.getMobileNetworkType()}")
    println("Data State: ${mobileDetails.getDataState()}")
    println("SIM State: ${mobileDetails.getSimState()}")

    // 4. Network capabilities
    println("\n--- 4. Network Capabilities ---")
    val capabilitiesChecker = NetworkCapabilitiesChecker(context)
    println("Has Internet: ${capabilitiesChecker.hasInternetAccess()}")
    println("Supports VPN: ${capabilitiesChecker.supportsVPN()}")
    println("Is Congested: ${capabilitiesChecker.isNetworkCongested()}")

    // 5. Network quality
    println("\n--- 5. Network Quality ---")
    val qualityEstimator = NetworkQualityEstimator(context)
    println("Network Quality: ${qualityEstimator.estimateNetworkQuality()}")
    println("Recommendation: ${qualityEstimator.getRecommendedAction()}")

    // 6. Network summary
    println("\n--- 6. Network Summary ---")
    val utils = NetworkUtils(context)
    val summary = utils.getNetworkSummary()
    summary.forEach { (key, value) -> println("$key: $value") }

    // Note: Network listener requires lifecycle management
    println("\n--- 7. Network Monitoring ---")
    println("Network monitoring methods:")
    println("  - startNetworkMonitoring(): Monitor network changes")
    println("  - stopNetworkMonitoring(): Stop monitoring")

    println("\n=== All Network Status Examples Completed ===")
}

// Android Kotlin Vibration Control Examples
// Using android.os.Vibrator and android.os.VibrationEffect

// 1. Basic Vibration
class BasicVibration(private val context: Context) {

    private val vibrator = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
        val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
        vibratorManager.defaultVibrator
    } else {
        @Suppress("DEPRECATION")
        context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
    }

    // Check if device has vibrator
    fun hasVibrator(): Boolean {
        return vibrator.hasVibrator()
    }

    // Vibrate for specified duration
    @SuppressLint("MissingPermission")
    fun vibrate(milliseconds: Long) {
        if (hasVibrator()) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                vibrator.vibrate(VibrationEffect.createOneShot(milliseconds, VibrationEffect.DEFAULT_AMPLITUDE))
            } else {
                @Suppress("DEPRECATION")
                vibrator.vibrate(milliseconds)
            }
        }
    }

    // Vibrate with custom amplitude
    @SuppressLint("MissingPermission")
    fun vibrateWithAmplitude(milliseconds: Long, amplitude: Int) {
        if (hasVibrator() && Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            vibrator.vibrate(VibrationEffect.createOneShot(milliseconds, amplitude))
        }
    }

    // Stop vibration
    fun stopVibration() {
        vibrator.cancel()
    }
}

// 2. Pattern Vibration
class PatternVibration(private val context: Context) {

    private val vibrator = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
        val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
        vibratorManager.defaultVibrator
    } else {
        @Suppress("DEPRECATION")
        context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
    }

    // Vibrate with pattern
    // Pattern format: [wait, vibrate, wait, vibrate, ...]
    @SuppressLint("MissingPermission")
    fun vibratePattern(pattern: LongArray, repeat: Int = -1) {
        if (hasVibrator()) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                val effect = VibrationEffect.createWaveform(pattern, repeat)
                vibrator.vibrate(effect)
            } else {
                @Suppress("DEPRECATION")
                vibrator.vibrate(pattern, repeat)
            }
        }
    }

    // Single beep pattern
    @SuppressLint("MissingPermission")
    fun beep() {
        val pattern = longArrayOf(0, 100, 0, 0)
        vibratePattern(pattern)
    }

    // Double beep pattern
    @SuppressLint("MissingPermission")
    fun doubleBeep() {
        val pattern = longArrayOf(0, 100, 100, 100, 0, 0)
        vibratePattern(pattern)
    }

    // Triple beep pattern
    @SuppressLint("MissingPermission")
    fun tripleBeep() {
        val pattern = longArrayOf(0, 100, 100, 100, 100, 100, 0, 0)
        vibratePattern(pattern)
    }

    // SOS pattern (... --- ...)
    @SuppressLint("MissingPermission")
    fun sos() {
        val pattern = longArrayOf(
            0, 100, 100, 100, 100, 100, 200,  // ...
            200, 300, 100, 300, 100, 300, 200,  // ---
            200, 100, 100, 100, 100, 100, 0  // ...
        )
        vibratePattern(pattern)
    }

    // Heartbeat pattern
    @SuppressLint("MissingPermission")
    fun heartbeat() {
        val pattern = longArrayOf(0, 50, 150, 50, 500, 0, 0)
        vibratePattern(pattern, 0) // Repeat
    }

    // Tick-tock pattern
    @SuppressLint("MissingPermission")
    fun tickTock() {
        val pattern = longArrayOf(0, 50, 200, 100, 0, 0)
        vibratePattern(pattern, 0) // Repeat
    }

    // Ascending pattern
    @SuppressLint("MissingPermission")
    fun ascending() {
        val pattern = longArrayOf(0, 50, 50, 100, 50, 150, 50, 200, 0, 0)
        vibratePattern(pattern)
    }

    // Descending pattern
    @SuppressLint("MissingPermission")
    fun descending() {
        val pattern = longArrayOf(0, 200, 50, 150, 50, 100, 50, 50, 0, 0)
        vibratePattern(pattern)
    }

    // Check if device has vibrator
    private fun hasVibrator(): Boolean {
        return vibrator.hasVibrator()
    }

    // Stop vibration
    fun stopVibration() {
        vibrator.cancel()
    }
}

// 3. Predefined Vibration Effects (API 26+)
class PredefinedVibrationEffects(private val context: Context) {

    private val vibrator = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
        val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
        vibratorManager.defaultVibrator
    } else {
        @Suppress("DEPRECATION")
        context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
    }

    // Click effect
    @SuppressLint("MissingPermission")
    fun click() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_CLICK))
        }
    }

    // Double click effect
    @SuppressLint("MissingPermission")
    fun doubleClick() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_DOUBLE_CLICK))
        }
    }

    // Tick effect
    @SuppressLint("MissingPermission")
    fun tick() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_TICK))
        }

    // Heavy click effect
    @SuppressLint("MissingPermission")
    fun heavyClick() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_HEAVY_CLICK))
        }
    }

    // Pop effect
    @SuppressLint("MissingPermission")
    fun pop() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_POP))
        }
    }

    // Thud effect
    @SuppressLint("MissingPermission")
    fun thud() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_THUD))
        }
    }

    private fun hasVibrator(): Boolean {
        return vibrator.hasVibrator()
    }
}

// 4. Amplitude-Based Vibration (API 26+)
class AmplitudeVibration(private val context: Context) {

    private val vibrator = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
        val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
        vibratorManager.defaultVibrator
    } else {
        @Suppress("DEPRECATION")
        context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
    }

    // Vibrate with amplitude pattern
    // Timings: duration of each vibration/pause
    // Amplitudes: intensity for each timing (0-255)
    @SuppressLint("MissingPermission")
    fun vibrateWithAmplitudes(timings: LongArray, amplitudes: IntArray, repeat: Int = -1) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            val effect = VibrationEffect.createWaveform(timings, amplitudes, repeat)
            vibrator.vibrate(effect)
        }
    }

    // Gentle vibration
    @SuppressLint("MissingPermission")
    fun gentleVibration() {
        val timings = longArrayOf(0, 200, 0, 0)
        val amplitudes = intArrayOf(0, 64, 0, 0)
        vibrateWithAmplitudes(timings, amplitudes)
    }

    // Medium vibration
    @SuppressLint("MissingPermission")
    fun mediumVibration() {
        val timings = longArrayOf(0, 200, 0, 0)
        val amplitudes = intArrayOf(0, 128, 0, 0)
        vibrateWithAmplitudes(timings, amplitudes)
    }

    // Strong vibration
    @SuppressLint("MissingPermission")
    fun strongVibration() {
        val timings = longArrayOf(0, 200, 0, 0)
        val amplitudes = intArrayOf(0, 255, 0, 0)
        vibrateWithAmplitudes(timings, amplitudes)
    }

    // Fade in vibration
    @SuppressLint("MissingPermission")
    fun fadeInVibration() {
        val timings = longArrayOf(0, 50, 50, 50, 50, 50, 50, 50, 0, 0)
        val amplitudes = intArrayOf(0, 50, 100, 150, 200, 255, 0, 0)
        vibrateWithAmplitudes(timings, amplitudes)
    }

    // Fade out vibration
    @SuppressLint("MissingPermission")
    fun fadeOutVibration() {
        val timings = longArrayOf(0, 50, 50, 50, 50, 50, 50, 50, 0, 0)
        val amplitudes = intArrayOf(0, 255, 200, 150, 100, 50, 0, 0)
        vibrateWithAmplitudes(timings, amplitudes)
    }

    // Ramp pattern (gentle to strong to gentle)
    @SuppressLint("MissingPermission")
    fun rampPattern() {
        val timings = longArrayOf(0, 100, 50, 100, 50, 100, 50, 100, 0, 0)
        val amplitudes = intArrayOf(0, 80, 120, 160, 200, 160, 120, 80, 0, 0)
        vibrateWithAmplitudes(timings, amplitudes)
    }

    private fun hasVibrator(): Boolean {
        return vibrator.hasVibrator()
    }
}

// 5. Notification Vibration Patterns
class NotificationVibrations(private val context: Context) {

    private val patternVibration = PatternVibration(context)

    // Success vibration
    @SuppressLint("MissingPermission")
    fun success() {
        patternVibration.vibratePattern(longArrayOf(0, 50, 100, 50, 0, 0))
    }

    // Error vibration
    @SuppressLint("MissingPermission")
    fun error() {
        patternVibration.vibratePattern(longArrayOf(0, 100, 50, 100, 50, 200, 0, 0))
    }

    // Warning vibration
    @SuppressLint("MissingPermission")
    fun warning() {
        patternVibration.vibratePattern(longArrayOf(0, 150, 100, 0, 0))
    }

    // Message received vibration
    @SuppressLint("MissingPermission")
    fun messageReceived() {
        patternVibration.vibratePattern(longArrayOf(0, 50, 150, 50, 0, 0))
    }

    // Call vibration
    @SuppressLint("MissingPermission")
    fun call() {
        val pattern = longArrayOf(0, 600, 400, 600, 0, 0)
        patternVibration.vibratePattern(pattern, 1) // Repeat
    }

    // Alarm vibration
    @SuppressLint("MissingPermission")
    fun alarm() {
        val pattern = longArrayOf(0, 500, 200, 500, 200, 500, 0, 0)
        patternVibration.vibratePattern(pattern, 1) // Repeat
    }
}

// 6. Haptic Feedback (API 26+)
class HapticFeedback(private val context: Context) {

    private val vibrator = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
        val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
        vibratorManager.defaultVibrator
    } else {
        @Suppress("DEPRECATION")
        context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
    }

    // Virtual key press
    @SuppressLint("MissingPermission")
    fun virtualKeyPress() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_TICK))
        }
    }

    // Long press
    @SuppressLint("MissingPermission")
    fun longPress() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_CLICK))
        }
    }

    // Text entry
    @SuppressLint("MissingPermission")
    fun textEntry() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && hasVibrator()) {
            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_TICK))
        }
    }

    private fun hasVibrator(): Boolean {
        return vibrator.hasVibrator()
    }
}

// 7. Vibration Controller
class VibrationController(private val context: Context) {

    private val basicVibration = BasicVibration(context)
    private val patternVibration = PatternVibration(context)
    private val predefinedEffects = PredefinedVibrationEffects(context)
    private val amplitudeVibration = AmplitudeVibration(context)
    private val notificationVibrations = NotificationVibrations(context)

    // Stop all vibrations
    fun stopAll() {
        basicVibration.stopVibration()
    }

    // Test vibration intensity
    @SuppressLint("MissingPermission")
    fun testIntensity(level: Int) {
        val amplitude = when (level) {
            1 -> 64
            2 -> 128
            3 -> 192
            4 -> 255
            else -> 128
        }
        basicVibration.vibrateWithAmplitude(200, amplitude)
    }

    // Vibrate for notification type
    @SuppressLint("MissingPermission")
    fun notify(type: String) {
        when (type) {
            "success" -> notificationVibrations.success()
            "error" -> notificationVibrations.error()
            "warning" -> notificationVibrations.warning()
            "message" -> notificationVibrations.messageReceived()
            "call" -> notificationVibrations.call()
            "alarm" -> notificationVibrations.alarm()
        }
    }
}

// Main demonstration
fun demonstrateVibrationControl(context: Context) {
    println("=== Android Kotlin Vibration Control Examples ===\n")

    // 1. Basic vibration
    println("--- 1. Basic Vibration ---")
    val basicVibration = BasicVibration(context)
    println("Has Vibrator: ${basicVibration.hasVibrator()}")
    println("Vibrate for 200ms:")
    // basicVibration.vibrate(200) // Uncomment to test

    println("\nVibrate with amplitude:")
    // basicVibration.vibrateWithAmplitude(200, 128) // Uncomment to test

    // 2. Pattern vibration
    println("\n--- 2. Pattern Vibration ---")
    val patternVibration = PatternVibration(context)
    println("Available patterns:")
    println("  - beep()")
    println("  - doubleBeep()")
    println("  - tripleBeep()")
    println("  - sos()")
    println("  - heartbeat()")
    println("  - tickTock()")
    println("  - ascending()")
    println("  - descending()")

    // 3. Predefined effects
    println("\n--- 3. Predefined Effects ---")
    val predefinedEffects = PredefinedVibrationEffects(context)
    println("Available predefined effects:")
    println("  - click()")
    println("  - doubleClick()")
    println("  - tick()")
    println("  - heavyClick()")
    println("  - pop()")
    println("  - thud()")

    // 4. Amplitude-based vibration
    println("\n--- 4. Amplitude-Based Vibration ---")
    val amplitudeVibration = AmplitudeVibration(context)
    println("Available amplitude patterns:")
    println("  - gentleVibration()")
    println("  - mediumVibration()")
    println("  - strongVibration()")
    println("  - fadeInVibration()")
    println("  - fadeOutVibration()")
    println("  - rampPattern()")

    // 5. Notification vibrations
    println("\n--- 5. Notification Vibrations ---")
    val notificationVibrations = NotificationVibrations(context)
    println("Available notification patterns:")
    println("  - success()")
    println("  - error()")
    println("  - warning()")
    println("  - messageReceived()")
    println("  - call()")
    println("  - alarm()")

    // 6. Haptic feedback
    println("\n--- 6. Haptic Feedback ---")
    val hapticFeedback = HapticFeedback(context)
    println("Available haptic feedback:")
    println("  - virtualKeyPress()")
    println("  - longPress()")
    println("  - textEntry()")

    // 7. Controller
    println("\n--- 7. Vibration Controller ---")
    val controller = VibrationController(context)
    println("Controller methods:")
    println("  - stopAll(): Stop all vibrations")
    println("  - testIntensity(level): Test vibration (1-4)")
    println("  - notify(type): Vibrate for notification type")

    println("\n=== All Vibration Control Examples Completed ===")
}