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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.
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <ProgressBar android:id="@+id/progressBar" style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerInParent="true" android:max="3" android:progress="100" /> <WebView android:id="@+id/webView" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/progressBar" android:layout_centerHorizontal="true" /> </RelativeLayout>
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
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.q11"> <uses-permission android:name="android.permission.INTERNET" /> <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>
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.
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