NoInternetActivity if no internet on startup

app/src/main/java/com/github/libretube/MainActivity.kt

@@ -5,6 +5,8 @@ import android.content.Context
 import android.content.Intent
 import android.content.pm.ActivityInfo
 import android.content.res.Configuration
+import android.net.ConnectivityManager
+import android.net.NetworkInfo
 import android.net.Uri
 import android.os.Build
 import androidx.appcompat.app.AppCompatActivity
@@ -13,6 +15,7 @@ import android.os.Handler
 import android.util.Log
 import android.view.*
 import android.view.inputmethod.InputMethodManager
+import android.widget.Button
 import android.widget.LinearLayout
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.appcompat.widget.Toolbar
@@ -57,63 +60,76 @@ class MainActivity : AppCompatActivity() {
             Locale.setDefault(locale)
             res.updateConfiguration(conf, dm)
         }
-        setContentView(R.layout.activity_main)
+
         when (sharedPreferences.getString("theme_togglee", "A")!!) {
             "A" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM)
             "L" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO)
             "D" -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)
         }
-        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
 
-        bottomNavigationView = findViewById(R.id.bottomNav)
+        val connectivityManager = this.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
-        navController = findNavController(R.id.fragment)
+        val networkInfo=connectivityManager.activeNetworkInfo
-        bottomNavigationView.setupWithNavController(navController)
+        val isConnected = networkInfo != null && networkInfo.isConnected
 
-        bottomNavigationView.setOnItemSelectedListener {
+        if (isConnected == false) {
-            when(it.itemId){
+            setContentView(R.layout.activity_nointernet)
-                R.id.home2 -> {
+            findViewById<Button>(R.id.retry_button).setOnClickListener() {
-                    navController.backQueue.clear()
+                recreate()
-                    navController.navigate(R.id.home2)
-                    true
-                }
-                R.id.subscriptions -> {
-                    //navController.backQueue.clear()
-                    navController.navigate(R.id.subscriptions)
-                    true
-                }
-                R.id.library -> {
-                    //navController.backQueue.clear()
-                    navController.navigate(R.id.library)
-                    true
-                }
             }
-            false
+        } else {
-        }
+            setContentView(R.layout.activity_main)
 
-        toolbar = findViewById(R.id.toolbar)
+            requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
-        val hexColor = String.format("#%06X", 0xFFFFFF and 0xcc322d)
-        val appName = HtmlCompat.fromHtml(
-            "Libre<span  style='color:$hexColor';>Tube</span>",
-            HtmlCompat.FROM_HTML_MODE_COMPACT
-        )
-        toolbar.title= appName
 
-        toolbar.setNavigationOnClickListener{
+            bottomNavigationView = findViewById(R.id.bottomNav)
-            //settings fragment stuff
+            navController = findNavController(R.id.fragment)
-            navController.navigate(R.id.settings)
+            bottomNavigationView.setupWithNavController(navController)
-            true
-        }
 
-        toolbar.setOnMenuItemClickListener{
+            bottomNavigationView.setOnItemSelectedListener {
-            when (it.itemId){
+                when (it.itemId) {
-                R.id.action_search -> {
+                    R.id.home2 -> {
-                    navController.navigate(R.id.searchFragment)
+                        navController.backQueue.clear()
-                    true
+                        navController.navigate(R.id.home2)
+                        true
+                    }
+                    R.id.subscriptions -> {
+                        //navController.backQueue.clear()
+                        navController.navigate(R.id.subscriptions)
+                        true
+                    }
+                    R.id.library -> {
+                        //navController.backQueue.clear()
+                        navController.navigate(R.id.library)
+                        true
+                    }
                 }
+                false
             }
-            false
-        }
 
+            toolbar = findViewById(R.id.toolbar)
+            val hexColor = String.format("#%06X", 0xFFFFFF and 0xcc322d)
+            val appName = HtmlCompat.fromHtml(
+                "Libre<span  style='color:$hexColor';>Tube</span>",
+                HtmlCompat.FROM_HTML_MODE_COMPACT
+            )
+            toolbar.title = appName
+
+            toolbar.setNavigationOnClickListener {
+                //settings fragment stuff
+                navController.navigate(R.id.settings)
+                true
+            }
+
+            toolbar.setOnMenuItemClickListener {
+                when (it.itemId) {
+                    R.id.action_search -> {
+                        navController.navigate(R.id.searchFragment)
+                        true
+                    }
+                }
+                false
+            }
+        }
 
     }
 

app/src/main/res/drawable/ic_wifi_off.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M22.99,9C19.15,5.16 13.8,3.76 8.84,4.78l2.52,2.52c3.47,-0.17 6.99,1.05 9.63,3.7l2,-2zM18.99,13c-1.29,-1.29 -2.84,-2.13 -4.49,-2.56l3.53,3.53 0.96,-0.97zM2,3.05L5.07,6.1C3.6,6.82 2.22,7.78 1,9l1.99,2c1.24,-1.24 2.67,-2.16 4.2,-2.77l2.24,2.24C7.81,10.89 6.27,11.73 5,13v0.01L6.99,15c1.36,-1.36 3.14,-2.04 4.92,-2.06L18.98,20l1.27,-1.26L3.29,1.79 2,3.05zM9,17l3,3 3,-3c-1.65,-1.66 -4.34,-1.66 -6,0z"/>
+</vector>

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

@@ -0,0 +1,37 @@
+<?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">
+
+    <ImageView
+        android:id="@+id/noInternet_imageView"
+        android:layout_width="200dp"
+        android:layout_height="200dp"
+        android:layout_marginTop="-50dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/ic_wifi_off" />
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/noInternet"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/noInternet_imageView" />
+
+    <Button
+        android:id="@+id/retry_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="10dp"
+        android:text="@string/retry"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -63,4 +63,6 @@
     <string name="lightTheme">Light Theme</string>
     <string name="darkTheme">Dark Theme</string>
     <string name="subscribers">%1$s subscribers</string>
+    <string name="noInternet">No Internet Connection</string>
+    <string name="retry">Retry</string>
 </resources>