how to check internet connection programmatically in kotlin android

how to check internet connection programmatically in kotlin android

In this article, today learn how to check internet connection programmatically in kotlin android. visit the StackOverflow.com

In android, by using the ConnectivityManager class we can easily determine whether the device connected to the network/internet or not and also we can determine the type of internet connection currently available i.e. whether it’s mobile data or Wi-Fi.

<manifest>

    ....

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

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

    ....

</manifest>

In android, we can determine the internet connection status easily by using getActiveNetworkInfo() method of the ConnectivityManager object.

Following is the code snippet of using the ConnectivityManager class to know whether the internet connection is available or not.

Check Internet Connection Status:

var cm = getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

var nInfo = cm.getActiveNetworkInfo()

var connected = nInfo != null && nInfo.isAvailable() && nInfo.isConnected()

Determine the Type of Internet Connection:

var cm = getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

var nInfo = cm.getActiveNetworkInfo()

var isWiFi = nInfo.getType() === ConnectivityManager.TYPE_WIFI

1.MainActivity.kt:

import android.content.Context

import android.net.ConnectivityManager

import android.net.NetworkInfo

import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.util.Log

import android.view.View

import android.widget.Button

import android.widget.Toast

class MainActivity:AppCompatActivity() {

  val isConnected:Boolean

  get() {

    val connected = false

    try

    {

      val cm = getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

      val nInfo = cm.getActiveNetworkInfo()

      connected = nInfo != null && nInfo.isAvailable() && nInfo.isConnected()

      return connected

    }

    catch (e:Exception) {

      Log.e("Connectivity Exception", e.message)

    }

    return connected

  }

  protected fun onCreate(savedInstanceState:Bundle) {

    super.onCreate(savedInstanceState)

    setContentView(R.layout.activity_main)

    val btnStatus = findViewById(R.id.btnCheck) as Button

    btnStatus.setOnClickListener(object:View.OnClickListener() {

      fun onClick(v:View) {

        // Check for Internet Connection

        if (isConnected)

        {

          Toast.makeText(getApplicationContext(), "Internet Connected", Toast.LENGTH_SHORT).show()

        }

        else

        {

          Toast.makeText(getApplicationContext(), "No Internet Connection", Toast.LENGTH_SHORT).show()

        }

      }

    })

  }

}

2. activity_main.xml :

 <?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical" android:layout_width="match_parent"

    android:layout_height="match_parent">

    <Button

        android:id="@+id/btnCheck"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="150dp"

        android:layout_marginLeft="100dp"

        android:text="Check Internet Connection" />

</LinearLayout>

 

 

3. AndroidManifest.xml:

 

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.tutlane.internetconnectionexample">

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

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

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>