How to show current progress while downloading a file on Android App using Kotlin?

This example demonstrates how to show current progress while downloading a file on Android App using Kotlin.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

Step 3 − Add the following code to src/MainActivity.kt

import android.os.Bundle
import android.view.View
import android.webkit.WebView
import android.widget.ProgressBar
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   lateinit var webView: WebView
   lateinit var progressBar: ProgressBar
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      webView = findViewById(R.id.webView)
      progressBar = findViewById(R.id.progressBar)
      webView.webViewClient = WebViewClient()
      webView.loadUrl("https://www.google.com/")
   }
   inner class WebViewClient : android.webkit.WebViewClient() {
      override fun shouldOverrideUrlLoading(view: WebView, url: String): Boolean {
         view.loadUrl(url)
         return true
      }
      override fun onPageFinished(view: WebView, url: String) {
         super.onPageFinished(view, url)
         progressBar.visibility = View.GONE
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from the android studio, open one of your project's activity files and click the Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen.

Click here to download the project code.