Android WebView: Handling Geolocation Permission Request
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
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| <?xml version="1.0" encoding="utf-8"?> | |
| <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" | |
| xmlns:app="http://schemas.android.com/apk/res-auto" | |
| 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/progressBarStyleHorizontal" | |
| android:layout_width="0dp" | |
| android:layout_height="wrap_content" | |
| android:layout_margin="0dp" | |
| android:minHeight="4dp" | |
| android:padding="0dp" | |
| app:layout_constraintEnd_toEndOf="parent" | |
| app:layout_constraintStart_toStartOf="parent" | |
| app:layout_constraintTop_toTopOf="parent" /> | |
| <WebView | |
| android:id="@+id/webView" | |
| android:layout_width="0dp" | |
| android:layout_height="0dp" | |
| app:layout_constraintBottom_toBottomOf="parent" | |
| app:layout_constraintEnd_toEndOf="parent" | |
| app:layout_constraintStart_toStartOf="parent" | |
| app:layout_constraintTop_toBottomOf="@+id/progressBar" /> | |
| </androidx.constraintlayout.widget.ConstraintLayout> |
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| <uses-permission android:name="android.permission.INTERNET"/> | |
| <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> | |
| <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> |
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| import android.Manifest | |
| import android.annotation.SuppressLint | |
| import android.content.DialogInterface | |
| import android.content.pm.PackageManager | |
| import android.net.http.SslError | |
| import android.os.Bundle | |
| import android.view.KeyEvent | |
| import android.webkit.* | |
| import android.widget.ProgressBar | |
| import androidx.appcompat.app.AlertDialog | |
| import androidx.appcompat.app.AppCompatActivity | |
| import androidx.core.app.ActivityCompat | |
| import androidx.core.content.ContextCompat | |
| import kotlinx.android.synthetic.main.activity_web.* | |
| class WebActivity : AppCompatActivity() { | |
| var pageUrl: String = "https://couponia.co/" | |
| var mGeoLocationRequestOrigin: String? = null | |
| var mGeoLocationCallback: GeolocationPermissions.Callback? = null | |
| val MAX_PROGRESS = 100 | |
| override fun onCreate(savedInstanceState: Bundle?) { | |
| super.onCreate(savedInstanceState) | |
| setContentView(R.layout.activity_web) | |
| initWebView() | |
| setWebClient() | |
| loadUrl(pageUrl) | |
| } | |
| @SuppressLint("SetJavaScriptEnabled") | |
| private fun initWebView() { | |
| webView.settings.javaScriptEnabled = true | |
| webView.settings.loadWithOverviewMode = true | |
| webView.settings.useWideViewPort = true | |
| webView.settings.domStorageEnabled = true | |
| webView.settings.databaseEnabled = true | |
| webView.settings.setAppCacheEnabled(true) | |
| webView.webViewClient = object : WebViewClient() { | |
| override | |
| fun onReceivedSslError(view: WebView?, handler: SslErrorHandler?, error: SslError?) { | |
| handler?.proceed() | |
| } | |
| } | |
| } | |
| private fun setWebClient() { | |
| webView.webChromeClient = object : WebChromeClient() { | |
| override fun onGeolocationPermissionsShowPrompt( | |
| origin: String?, | |
| callback: GeolocationPermissions.Callback? | |
| ) { | |
| if (ContextCompat.checkSelfPermission( | |
| this@WebActivity, | |
| Manifest.permission.ACCESS_FINE_LOCATION | |
| ) | |
| != PackageManager.PERMISSION_GRANTED | |
| ) { | |
| if (ActivityCompat.shouldShowRequestPermissionRationale( | |
| this@WebActivity, | |
| Manifest.permission.ACCESS_FINE_LOCATION | |
| ) | |
| ) { | |
| AlertDialog.Builder(this@WebActivity) | |
| .setMessage("Please turn ON the GPS to make app work smoothly") | |
| .setNeutralButton( | |
| android.R.string.ok, | |
| DialogInterface.OnClickListener { dialogInterface, i -> | |
| mGeoLocationCallback = callback | |
| mGeoLocationRequestOrigin = origin | |
| ActivityCompat.requestPermissions( | |
| this@WebActivity, | |
| arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), 1001 | |
| ) | |
| }) | |
| .show() | |
| } else { | |
| //no explanation need we can request the locatio | |
| mGeoLocationCallback = callback | |
| mGeoLocationRequestOrigin = origin | |
| ActivityCompat.requestPermissions( | |
| this@WebActivity, | |
| arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), 1001 | |
| ) | |
| } | |
| } else { | |
| //tell the webview that permission has granted | |
| callback!!.invoke(origin, true, true) | |
| } | |
| } | |
| override fun onProgressChanged(view: WebView?, newProgress: Int) { | |
| super.onProgressChanged(view, newProgress) | |
| progressBar.progress = newProgress | |
| if (newProgress < MAX_PROGRESS && progressBar.visibility == ProgressBar.GONE) { | |
| progressBar.visibility = ProgressBar.VISIBLE | |
| } | |
| if (newProgress == MAX_PROGRESS) { | |
| progressBar.visibility = ProgressBar.GONE | |
| } | |
| } | |
| } | |
| } | |
| override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean { | |
| // Check if the key event was the Back button and if there's history | |
| if (keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()) { | |
| webView.goBack() | |
| return true | |
| } | |
| // If it wasn't the Back key or there's no web page history, exit the activity) | |
| return super.onKeyDown(keyCode, event) | |
| } | |
| private fun loadUrl(pageUrl: String) { | |
| webView.loadUrl(pageUrl) | |
| } | |
| override fun onRequestPermissionsResult( | |
| requestCode: Int, | |
| permissions: Array<out String>, | |
| grantResults: IntArray | |
| ) { | |
| super.onRequestPermissionsResult(requestCode, permissions, grantResults) | |
| when (requestCode) { | |
| 1001 -> { | |
| //if permission is cancel result array would be empty | |
| if (grantResults.size > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { | |
| //permission was granted | |
| if (mGeoLocationCallback != null) { | |
| mGeoLocationCallback!!.invoke(mGeoLocationRequestOrigin, true, true) | |
| } | |
| } else { | |
| //permission denied | |
| if (mGeoLocationCallback != null) { | |
| mGeoLocationCallback!!.invoke(mGeoLocationRequestOrigin, false, false) | |
| } | |
| } | |
| } | |
| } | |
| } |
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