Addresses issue #33 and adds new auto load feature (#34)

* Update to android 11 using All Files Access permission

* Removed special/forbidden chars from date

* Auto loads past game saves

* Fixed string name being printed instead of contents

* Fixed initial crash

* Update AndroidManifest.xml

* Fixed initial crash part 2

* Moved prompt for all files access

* Changed date format for better sorting in directories

* Added icon

PKHeX.Android/PKHeX.Android.csproj

@@ -16,7 +16,7 @@
     <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
     <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
     <AndroidUseLatestPlatformSdk>false</AndroidUseLatestPlatformSdk>
-    <TargetFrameworkVersion>v10.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v11.0</TargetFrameworkVersion>
     <AndroidEnableSGenConcurrent>true</AndroidEnableSGenConcurrent>
     <AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
     <NuGetPackageImportStamp>

PKHeX.Android/Properties/AndroidManifest.xml

@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.ProjectPokemon.PKHeX" android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="29" android:targetSdkVersion="29" />
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="3" android:versionName="1.1.1" package="com.ProjectPokemon.PKHeX" android:installLocation="auto">
+	<uses-sdk android:minSdkVersion="30" android:targetSdkVersion="30" />
 	<application android:label="PKHeX.Android"></application>
 	<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+	<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
 	<uses-permission android:name="android.permission.CAMERA" />
 </manifest>

PKHeX.Android/Properties/AssemblyInfo.cs

@@ -30,4 +30,6 @@
 
 // Add some common permissions, these can be removed if not needed
 [assembly: UsesPermission(Android.Manifest.Permission.Internet)]
+[assembly: UsesPermission(Android.Manifest.Permission.ReadExternalStorage)]
 [assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]
+[assembly: UsesPermission(Android.Manifest.Permission.ManageExternalStorage)]

PKHeX.Mobile/Logic/FileUtil.cs

@@ -12,12 +12,14 @@ namespace PKHeX.Mobile.Logic
     // todo: rename this class to not clash with PKHeX.Core
     public static class FileUtil
     {
+        private static string outputFolder = "/storage/emulated/0/PkHex/";
         public static async Task<FileResult> PickFile()
         {
             var fileData = await FilePicker.PickAsync(PickOptions.Default).ConfigureAwait(false);
             if (fileData == null)
                 return null; // user canceled file picking
             Debug.WriteLine($"File name chosen: {fileData.FileName}");
+            Debug.WriteLine($"File path chosen: {fileData.FullPath}");
             return fileData;
         }
 
@@ -55,6 +57,26 @@ public static async Task<SaveFile> TryGetSaveFile()
             }
         }
 
+        public static SaveFile TryGetSaveFile(string filePath)
+        {
+            try
+            {
+                var data = File.ReadAllBytes(filePath);
+                var len = data.Length;
+                bool isPossibleSAV = SaveUtil.IsSizeValid(len);
+                if (!isPossibleSAV)
+                    return null;
+                var sav = SaveUtil.GetVariantSAV(data);
+                sav?.Metadata.SetExtraInfo(filePath);
+                return sav;
+            }
+            catch
+            {
+                //Ignore errors as this is meant to be a background scanning function
+                return null;
+            }
+        }
+
         public static async Task<bool> ExportSAV(SaveFile sav)
         {
             if (!sav.State.Exportable)
@@ -63,13 +85,26 @@ public static async Task<bool> ExportSAV(SaveFile sav)
                 return false;
             }
 
+            //Create directory structure
+            if (!Directory.Exists(outputFolder))
+            {
+                Directory.CreateDirectory(outputFolder);
+            }
+            String myDate = DateTime.Now.ToString("yyyy-MM-dd HH.mm.ss");
+            if (!Directory.Exists(outputFolder + myDate + "/"))
+            {
+                Directory.CreateDirectory(outputFolder + myDate + "/");
+            }
+
             var data = sav.Write();
-            var path = sav.Metadata.FilePath;
+            var path = outputFolder + myDate + "/" + Path.GetFileName(sav.Metadata.FilePath);
+            sav?.Metadata.SetExtraInfo(path);
+            Debug.WriteLine($"File path moved: {sav.Metadata.FilePath}");
             try
             {
                 if (sav.State.Exportable)
                     await SaveBackup(sav).ConfigureAwait(false);
-
+                File.Create(path).Close();
                 await File.WriteAllBytesAsync(path, data).ConfigureAwait(false);
                 await UserDialogs.Instance.AlertAsync($"Exported save file to: {path}").ConfigureAwait(false);
                 return true;
@@ -78,7 +113,8 @@ public static async Task<bool> ExportSAV(SaveFile sav)
             catch (Exception ex)
 #pragma warning restore CA1031 // Do not catch general exception types
             {
-                await UserDialogs.Instance.AlertAsync($"Failed: {ex}").ConfigureAwait(false);
+                await UserDialogs.Instance.AlertAsync($"Failed to access \"" + outputFolder + "\" please grant All File Access Special Permision").ConfigureAwait(false);
+                //await UserDialogs.Instance.AlertAsync($"Failed: {ex}").ConfigureAwait(false);
                 return false;
             }
         }

PKHeX.Mobile/PKHeX.Mobile.csproj

@@ -4,6 +4,7 @@
     <TargetFramework>netstandard2.1</TargetFramework>
     <ProduceReferenceAssembly>true</ProduceReferenceAssembly>
     <LangVersion>latest</LangVersion>
+    <ApplicationIcon>icon.ico</ApplicationIcon>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

PKHeX.Mobile/Views/Loader.xaml.cs

@@ -8,15 +8,47 @@
 using PKHeX.ViewModels;
 using Xamarin.Forms;
 using Xamarin.Forms.Xaml;
+using System.IO;
 
 namespace PKHeX.Mobile.Views
 {
     [XamlCompilation(XamlCompilationOptions.Compile)]
     public partial class Loader : ContentPage
     {
+        private static string outputFolder = "/storage/emulated/0/PkHex/";
         public Loader()
         {
             InitializeComponent();
+            initialLoad();
+        }
+
+        private async void initialLoad()
+        {
+            try
+            {
+                if (CV_Saves.SelectedItem == null)
+                {
+                    if (Directory.Exists(outputFolder))
+                    {
+                        foreach (string filePath in Directory.EnumerateFiles(outputFolder, "*", SearchOption.AllDirectories))
+                        {
+                            var sav = Logic.FileUtil.TryGetSaveFile(filePath);
+                            if (sav != null)
+                            {
+                                var match = VM.Saves.FirstOrDefault(z => z.LocatedAt(sav.Metadata.FilePath));
+                                if (match != null)
+                                    CV_Saves.SelectedItem = match;
+                                else
+                                    await LoadNewSaveFile(sav).ConfigureAwait(false);
+                            }
+                        }
+                    }
+                }
+            } catch
+            {
+                //first time load, ignore error
+                return;
+            }
         }
 
         private async void TgrOpenTapped(object sender, EventArgs e)