Check Internet Connection Status in Android

Android allows to check if device is connected to the internet, and also we can determine what type of network connection currently available (Wi-Fi, cellular).

To get the internet connection status, we need to request the ACCESS_NETWORK_STATE permission in the manifest file.

app/src/main/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.app">

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

    <application>
        ...
    </application>

</manifest>

We get an instance of ConnectivityManager which allows getting the NetworkCapabilities for active network. By using the hasTransport() method, we check internet connection status.

app/src/main/java/com/example/app/MainActivity.kt

package com.example.app

import android.content.Context
import android.net.ConnectivityManager
import android.net.NetworkCapabilities
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log

class MainActivity : AppCompatActivity()
{
    override fun onCreate(savedInstanceState: Bundle?)
    {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val connManager = getSystemService(Context.CONNECTIVITY_SERVICE)
                as ConnectivityManager

        val capabilities = connManager.getNetworkCapabilities(connManager.activeNetwork)

        if (capabilities != null) {
            when {
                capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> {
                    Log.d("MY_APP", "Connected to Wi-Fi network")
                }
                capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> {
                    Log.d("MY_APP", "Connected to cellular network")
                }
                else -> {
                    Log.d("MY_APP", "No Internet access")
                }
            }
        } else {
            Log.d("MY_APP", "No Internet access")
        }
    }
}