fix(app): fix issue with external link redirection in android app

app/app/build.gradle

@@ -10,7 +10,7 @@ android {
         applicationId "me.rxresu.app"
         minSdk 21
         targetSdk 32
-        versionCode 2
+        versionCode 3
         versionName "1.0"
 
         resConfigs "en"

app/app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android"
     package="me.rxresu.app">
 
     <uses-permission android:name="android.permission.INTERNET"/>
@@ -10,11 +11,11 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.ReactiveResume.NoActionBar">
+        android:theme="@style/AppTheme">
         <activity
+            android:configChanges="orientation|screenSize"
             android:name=".MainActivity"
-            android:exported="true"
-            android:theme="@style/Theme.ReactiveResume.NoActionBar">
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

app/app/src/main/java/me/rxresu/app/CustomWebViewClient.kt

@@ -0,0 +1,21 @@
+package me.rxresu.app
+
+import android.content.Intent
+import android.net.Uri
+import android.webkit.WebView
+import android.webkit.WebViewClient
+
+internal class CustomWebViewClient : WebViewClient() {
+    override fun shouldOverrideUrlLoading(view: WebView, url: String): Boolean {
+        val hostname = "rxresu.me"
+        val uri = Uri.parse(url)
+
+        if (uri.host != null && uri.host!!.endsWith(hostname)) {
+            return false
+        }
+
+        view.context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(url)))
+
+        return true
+    }
+}

app/app/src/main/java/me/rxresu/app/MainActivity.kt

@@ -1,21 +1,15 @@
 package me.rxresu.app
 
 import android.annotation.SuppressLint
-import android.graphics.Bitmap
 import android.os.Bundle
-import android.view.KeyEvent
-import android.webkit.WebResourceError
-import android.webkit.WebResourceRequest
 import android.webkit.WebView
-import android.webkit.WebViewClient
 import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
 
     private lateinit var webView: WebView
 
-    private var isLoaded: Boolean = false
-    private var webURL = "https://rxresu.me"
+    private var url = "https://rxresu.me"
 
     @SuppressLint("SetJavaScriptEnabled")
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -24,53 +18,18 @@ class MainActivity : AppCompatActivity() {
 
         webView = findViewById(R.id.webview)
 
+        webView.webViewClient = CustomWebViewClient()
         webView.settings.javaScriptEnabled = true
         webView.settings.userAgentString = "Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Mobile Safari/537.36"
-    }
-
-    override fun onResume() {
-        if (!isLoaded) loadWebView()
 
-        super.onResume()
+        webView.loadUrl(url)
     }
 
-    private fun loadWebView() {
-        webView.loadUrl(webURL)
-
-        webView.webViewClient = object : WebViewClient() {
-            override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
-                val url = request?.url.toString()
-                view?.loadUrl(url)
-                return super.shouldOverrideUrlLoading(view, request)
-            }
-
-            override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
-                super.onPageStarted(view, url, favicon)
-            }
-
-            override fun onPageFinished(view: WebView?, url: String?) {
-                isLoaded = true
-                super.onPageFinished(view, url)
-            }
-
-            override fun onReceivedError(view: WebView, request: WebResourceRequest, error: WebResourceError) {
-                isLoaded = false
-                super.onReceivedError(view, request, error)
-            }
+    override fun onBackPressed() {
+        if (webView.canGoBack()) {
+            webView.goBack()
+        } else {
+            super.onBackPressed()
         }
     }
-
-    override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
-        if (event.action == KeyEvent.ACTION_DOWN) {
-            if (keyCode == KeyEvent.KEYCODE_BACK) {
-                if (webView.canGoBack()) {
-                    webView.goBack()
-                }
-
-                return true
-            }
-        }
-
-        return super.onKeyDown(keyCode, event)
-    }
 }

app/app/src/main/res/layout/content_main.xml

@@ -2,7 +2,6 @@
 <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">
 

app/app/src/main/res/values/themes.xml

@@ -1,12 +1,6 @@
 <resources>
-    <style name="Theme.ReactiveResume" parent="Theme.MaterialComponents.DayNight.DarkActionBar" />
-
-    <style name="Theme.ReactiveResume.NoActionBar">
+    <style name="AppTheme" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
     </style>
-
-    <style name="Theme.ReactiveResume.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
-
-    <style name="Theme.ReactiveResume.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
 </resources>