Adding early new page for app list and app detail with back to last page support (+settings support everywhere)

app/src/main/java/com/mylloon/mobidl/MainActivity.kt

@@ -31,10 +31,15 @@ import java.util.*
 
 class MainActivity : AppCompatActivity() {
     private var settingsButton: Menu? = null // before starting the app there is no settings button
+    private var settingsButtonVisible: Boolean = false
     private var inSettings: Boolean = false // by default your not in settings page
+    private var inAppList: Boolean = false // by default your not in app list page
+    private var inAppInfo: Boolean = false // by default your not in app info page
     private var prefs: SharedPreferences? = null // first run detection
     private val sharedPref = "com.mylloon.MobiDL" // shared pref name
-    var timeOfLastToast: Long = System.currentTimeMillis() - 2000
+    private var timeOfLastToast: Long = System.currentTimeMillis() - 2000
+    private var listInfos: MutableList<Map<String, String?>>? = null
+    private var urlInfos: String? = null
 
     companion object {
         private var instance: MainActivity? = null
@@ -49,8 +54,8 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun toggleSettingsButtonVisibility() { // Change Settings button visibility
-        val visibility: Boolean = settingsButton?.findItem(R.id.settingsButton)?.isVisible == true
-        settingsButton?.findItem(R.id.settingsButton)?.isVisible = !visibility
+        settingsButtonVisible = settingsButton?.findItem(R.id.settingsButton)?.isVisible == false
+        settingsButton?.findItem(R.id.settingsButton)?.isVisible = settingsButtonVisible
     }
 
     private fun getValuesRecyclerView(): MutableList<String> { // list of the apps (from the storage if exists)
@@ -121,9 +126,11 @@ class MainActivity : AppCompatActivity() {
     private fun mainPage(toDelete: String? = null) {
         if (toDelete == null) {
             setContentView(R.layout.activity_main) // display main page
-            Handler(Looper.getMainLooper()).postDelayed({
-                toggleSettingsButtonVisibility()
-            }, 100) // delay to add button settings
+            if (!settingsButtonVisible) { // check if the settings button isn't already showed
+                Handler(Looper.getMainLooper()).postDelayed({
+                    toggleSettingsButtonVisibility()
+                }, 100) // delay to add button settings
+            }
         }
         val user = Credentials().get(0).toString()
         this.title = "${getString(R.string.app_name)} (${getString(R.string.connected_as)} $user)"
@@ -344,11 +351,26 @@ class MainActivity : AppCompatActivity() {
                             Toast.LENGTH_SHORT
                         ).show()
                     }
+                    listInfos = returns
+                    showAppListPage()
                 }
             }
         }
     }
 
+    private fun showAppListPage() {
+        setContentView(R.layout.activity_app_list) // display main page
+        inAppList = true
+        urlInfos = "XD"
+        println(listInfos)
+    }
+
+    private fun showAppInfoPage() {
+        setContentView(R.layout.activity_app_infos) // display main page
+        inAppInfo = true
+        println(urlInfos)
+    }
+
     @SuppressLint("SetTextI18n")
     private fun settingsPage() {
         setContentView(R.layout.activity_settings)
@@ -404,9 +426,24 @@ class MainActivity : AppCompatActivity() {
     }
 
     override fun onBackPressed() { // allow user to use back button to go back to main page
-        if (inSettings) {
-            mainPage()
-            inSettings = false
-        } else super.onBackPressed()
+        when {
+            inSettings -> {
+                inSettings = false
+                return when {
+                    inAppList -> showAppListPage()
+                    inAppInfo -> showAppListPage()
+                    else -> mainPage()
+                }
+            }
+            inAppList -> {
+                inAppList = false
+                return mainPage()
+            }
+            inAppInfo -> {
+                inAppInfo = false
+                return showAppInfoPage()
+            }
+            else -> super.onBackPressed()
+        }
     }
 }

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

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    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">
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    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">
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout
+    android:id="@+id/mainLayout"
     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"