Android Jetpack Compose – Display Current Internet Connection Type

Many times in android applications it is mandatory to check the user’s mobile connectivity to the internet whether it may be through mobile data or using Wi-Fi so that the app will work fine with different internet connectivity sources. In this article, we will be building a simple application in which we will be checking the real-time connection type of android devices using Jetpack Compose. A sample video is given below to get an idea about what we are going to do in this article.

Step by Step Implementation

Step 1: Create a New Project in Android Studio

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. While choosing the template, select Empty Compose Activity. If you do not find this template, try upgrading the Android Studio to the latest version. We demonstrated the application in Kotlin, so make sure you select Kotlin as the primary language while creating a New Project.

Step 2: Adding a new color to the Color.kt file

Navigate to app > java > your app’s package name > ui.theme > Color.kt file and add the below code to it. 

Kotlin

package com.example.newcanaryproject.ui.theme

import androidx.compose.ui.graphics.Color

val Purple200 = Color(0xFF0F9D58)
val Purple500 = Color(0xFF0F9D58)
val Purple700 = Color(0xFF3700B3)
val Teal200 = Color(0xFF03DAC5)

// on below line we are adding different colors.
val greenColor = Color(0xFF0F9D58)

Step 3: Working with the MainActivity.kt file

Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.

Kotlin

package com.example.newcanaryproject

import android.app.Activity
import android.content.Context
import android.content.pm.ActivityInfo
import android.net.ConnectivityManager
import android.os.Build
import android.os.Bundle
import android.provider.Settings.*
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.annotation.RequiresApi
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.core.content.ContextCompat.getSystemService
import com.example.newcanaryproject.ui.theme.NewCanaryProjectTheme
import com.example.newcanaryproject.ui.theme.greenColor


class MainActivity : ComponentActivity() {

    @RequiresApi(Build.VERSION_CODES.M)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            NewCanaryProjectTheme {
                // on below line we are specifying background
                // color for our application
                Surface(
                    // on the below line we are specifying modifier
                    // and color for our app
                    modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background
                ) {

                    // on the below line we are specifying
                    // the theme as the scaffold.
                    Scaffold(

                        // in scaffold we are specifying the top bar.
                        topBar = {

                            // inside top bar we are specifying
                            // background color.
                            TopAppBar(backgroundColor = greenColor,

                                // along with that we are specifying
                                // title for our top bar.
                                title = {

                                    // in the top bar we are specifying
                                    // title as a text
                                    Text(
                                        // on below line we are specifying
                                        // text to display in top app bar.
                                        text = "GFG",

                                        // on below line we are specifying
                                        // modifier to fill max width.
                                        modifier = Modifier.fillMaxWidth(),

                                        // on below line we are specifying
                                        // text alignment.
                                        textAlign = TextAlign.Center,

                                        // on below line we are specifying
                                        // color for our text.
                                        color = Color.White
                                    )
                                })
                        }) {
                        // on below line we are calling our
                        // method to display UI
                        connectionChecker(LocalContext.current)
                    }
                }
            }
        }
    }

}

@Composable
fun connectionChecker(
    context: Context,
) {

    // on below line creating a variable
    // for connection status.
    val connectionType = remember {
        mutableStateOf("Not Connected")
    }
    // on below line we are creating a column,
    Column(
        // on below line we are adding
        // a modifier to it,
        modifier = Modifier
            .fillMaxSize()
            // on below line we are
            // adding a padding.
            .padding(all = 30.dp),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center,
    ) {

        // A Thread that will continuously
        // monitor the Connection Type
        Thread(Runnable {
            while (true) {

                // Invoking the Connectivity Manager
                val cm =
                    context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

                // Fetching the Network Information
                val netInfo = cm.allNetworkInfo

                // on below line finding if connection
                // type is wifi or mobile data.
                for (ni in netInfo) {
                    if (ni.typeName.equals("WIFI", ignoreCase = true))
                        if (ni.isConnected) connectionType.value = "WIFI"
                    if (ni.typeName.equals("MOBILE", ignoreCase = true))
                        if (ni.isConnected) connectionType.value = "MOBILE DATA"
                }
            }
        }).start() // Starting the thread


        // on below line we are adding a text for heading.
        Text(
            // on below line we are specifying text
            text = "Real-Time Internet Connectivity Checker in Android",
            // on below line we are specifying text color,
            // font size and font weight
            color = greenColor,
            fontSize = 20.sp,
            fontWeight = FontWeight.Bold,
            textAlign = TextAlign.Center
        )

        // on below line adding a spacer.
        Spacer(modifier = Modifier.height(20.dp))

        // on below line we are adding a text
        // for displaying connection type.
        Text(
            // on below line we are specifying text
            text = connectionType.value,
            // on below line we are specifying text color,
            // font size and font weight
            color = Color.Black, fontSize = 20.sp, fontWeight = FontWeight.Bold
        )
    }
}

Step 4: Adding permissions in the AndroidManifest.xml file

Navigate to app > AndroidManifest.xml file and add the below permissions to it. 

XML

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

Now run your project to see its output of it. 

Output: