Check internet connectivity android in kotlin

Question

I tried the answer from this (the accepted answer). I can use the "PING" method but the UI went black since it says it will block the UI Thread. It didn't look good and was disturbing so I tried to use the second method "Connect to a Socket on the Internet" but I don't know how to use the class in Kotlin.

This is the result of converted Java to kotlin by android studio

package com.mockie.daikokuten.helpers  import android.os.AsyncTask.execute import android.os.AsyncTask import java.io.IOException import java.net.InetSocketAddress import java.net.Socket   internal class InternetCheck(private val mConsumer: Consumer) : AsyncTask<Void, Void, Boolean>() { interface Consumer {     fun accept(internet: Boolean?) }  init {     execute() }  override fun doInBackground(vararg voids: Void): Boolean? {     try {         val sock = Socket()         sock.connect(InetSocketAddress("8.8.8.8", 53), 1500)         sock.close()         return true     } catch (e: IOException) {         return false     }  }  override fun onPostExecute(internet: Boolean?) {     mConsumer.accept(internet) } } 

but I DONT KNOW HOW TO USE IT. I tried this way:

InternetCheck{ internet-> Log.d("test", "asdasdas") } 

It didnt work and results in an error. It says I have to pass "Consumer".

My question is How to use that class?

Answer 1

Update: Since Android 10 the use of the NetWorkInfo class and its methods are obsolete, now you must use the ConectivityManager class and getNetworkCapabilities () method from NetworkCapabilities Class.

How to check connectivity in Android?

Kotlin :

fun isOnline(context: Context): Boolean {     val connectivityManager =         context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager     if (connectivityManager != null) {         val capabilities =             connectivityManager.getNetworkCapabilities(connectivityManager.activeNetwork)         if (capabilities != null) {             if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {                 Log.i("Internet", "NetworkCapabilities.TRANSPORT_CELLULAR")                 return true             } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {                 Log.i("Internet", "NetworkCapabilities.TRANSPORT_WIFI")                 return true             } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) {                 Log.i("Internet", "NetworkCapabilities.TRANSPORT_ETHERNET")                 return true             }         }     }     return false } 

Java:

public static boolean isOnline(Context context) {     ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);      if (connectivityManager != null) {         NetworkCapabilities capabilities = connectivityManager.getNetworkCapabilities(connectivityManager.getActiveNetwork());         if (capabilities != null) {             if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {                 Log.i("Internet", "NetworkCapabilities.TRANSPORT_CELLULAR");                 return true;             } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {                 Log.i("Internet", "NetworkCapabilities.TRANSPORT_WIFI");                 return true;             } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) {                 Log.i("Internet", "NetworkCapabilities.TRANSPORT_ETHERNET");                 return true;             }         }     }          return false; } 

both methods require the permissions:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.INTERNET"/> 

Answer 2

Check internet connectivity in android kotlin

fun isNetworkAvailable(context: Context?): Boolean {     if (context == null) return false     val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {         val capabilities = connectivityManager.getNetworkCapabilities(connectivityManager.activeNetwork)         if (capabilities != null) {             when {                 capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> {                     return true                 }                 capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> {                     return true                 }                 capabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) -> {                     return true                 }             }         }     } else {         val activeNetworkInfo = connectivityManager.activeNetworkInfo         if (activeNetworkInfo != null && activeNetworkInfo.isConnected) {             return true         }     }     return false }