Finished switch to new download/install process

lib/main.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:obtainium/pages/home.dart';
 import 'package:obtainium/services/apps_provider.dart';
 import 'package:obtainium/services/source_service.dart';
@@ -30,6 +31,10 @@ void backgroundUpdateCheck() {
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
+  SystemChrome.setSystemUIOverlayStyle(
+    const SystemUiOverlayStyle(systemNavigationBarColor: Colors.transparent),
+  );
+  SystemChrome.setEnabledSystemUIMode(SystemUiMode.edgeToEdge);
   Workmanager().initialize(
     backgroundUpdateCheck,
   );

lib/pages/app.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:obtainium/services/apps_provider.dart';
-import 'package:obtainium/services/source_service.dart';
 import 'package:webview_flutter/webview_flutter.dart';
 import 'package:provider/provider.dart';
 
@@ -23,77 +22,82 @@ class _AppPageState extends State<AppPage> {
     }
     return Scaffold(
       appBar: AppBar(
-        title: Text('${app!.app.author}/${app.app.name}'),
+        title: Text('${app?.app.author}/${app?.app.name}'),
       ),
       body: WebView(
-        initialUrl: app.app.url,
+        initialUrl: app?.app.url,
-      ),
-      bottomSheet: Column(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          Padding(
-              padding:
-                  const EdgeInsets.symmetric(vertical: 8.0, horizontal: 16.0),
-              child: Row(
-                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-                  children: [
-                    Expanded(
-                        child: ElevatedButton(
-                            onPressed: (app.app.installedVersion == null ||
-                                        appsProvider.checkAppObjectForUpdate(
-                                            app.app)) &&
-                                    app.downloadProgress == null
-                                ? () {
-                                    appsProvider.downloadAndInstallLatestApp(
-                                        app.app.id);
-                                  }
-                                : null,
-                            child: Text(app.app.installedVersion == null
-                                ? 'Install'
-                                : 'Update'))),
-                    const SizedBox(width: 16.0),
-                    ElevatedButton(
-                      onPressed: app.downloadProgress != null
-                          ? null
-                          : () {
-                              showDialog(
-                                  context: context,
-                                  builder: (BuildContext ctx) {
-                                    return AlertDialog(
-                                      title: const Text('Remove App?'),
-                                      content: Text(
-                                          'This will remove \'${app.app.name}\' from Obtainium.${app.app.installedVersion != null ? '\n\nNote that while Obtainium will no longer track its updates, the App will remain installed.' : ''}'),
-                                      actions: [
-                                        TextButton(
-                                            onPressed: () {
-                                              appsProvider
-                                                  .removeApp(app.app.id)
-                                                  .then((_) {
-                                                int count = 0;
-                                                Navigator.of(context).popUntil(
-                                                    (_) => count++ >= 2);
-                                              });
-                                            },
-                                            child: const Text('Remove')),
-                                        TextButton(
-                                            onPressed: () {
-                                              Navigator.of(context).pop();
-                                            },
-                                            child: const Text('Cancel'))
-                                      ],
-                                    );
-                                  });
-                            },
-                      style: TextButton.styleFrom(
-                          foregroundColor: Theme.of(context).errorColor,
-                          surfaceTintColor: Theme.of(context).errorColor),
-                      child: const Text('Remove'),
-                    ),
-                  ])),
-          if (app.downloadProgress != null)
-            LinearProgressIndicator(value: app.downloadProgress)
-        ],
       ),
+      bottomSheet: Padding(
+          padding: EdgeInsets.fromLTRB(
+              0, 0, 0, MediaQuery.of(context).padding.bottom),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 8, 16, 0),
+                  child: Row(
+                      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                      children: [
+                        Expanded(
+                            child: ElevatedButton(
+                                onPressed: (app?.app.installedVersion == null ||
+                                            appsProvider
+                                                .checkAppObjectForUpdate(
+                                                    app!.app)) &&
+                                        app?.downloadProgress == null
+                                    ? () {
+                                        appsProvider
+                                            .downloadAndInstallLatestApp(
+                                                app!.app.id);
+                                      }
+                                    : null,
+                                child: Text(app?.app.installedVersion == null
+                                    ? 'Install'
+                                    : 'Update'))),
+                        const SizedBox(width: 16.0),
+                        ElevatedButton(
+                          onPressed: app?.downloadProgress != null
+                              ? null
+                              : () {
+                                  showDialog(
+                                      context: context,
+                                      builder: (BuildContext ctx) {
+                                        return AlertDialog(
+                                          title: const Text('Remove App?'),
+                                          content: Text(
+                                              'This will remove \'${app?.app.name}\' from Obtainium.${app?.app.installedVersion != null ? '\n\nNote that while Obtainium will no longer track its updates, the App will remain installed.' : ''}'),
+                                          actions: [
+                                            TextButton(
+                                                onPressed: () {
+                                                  appsProvider
+                                                      .removeApp(app!.app.id)
+                                                      .then((_) {
+                                                    int count = 0;
+                                                    Navigator.of(context)
+                                                        .popUntil((_) =>
+                                                            count++ >= 2);
+                                                  });
+                                                },
+                                                child: const Text('Remove')),
+                                            TextButton(
+                                                onPressed: () {
+                                                  Navigator.of(context).pop();
+                                                },
+                                                child: const Text('Cancel'))
+                                          ],
+                                        );
+                                      });
+                                },
+                          style: TextButton.styleFrom(
+                              foregroundColor: Theme.of(context).errorColor,
+                              surfaceTintColor: Theme.of(context).errorColor),
+                          child: const Text('Remove'),
+                        ),
+                      ])),
+              if (app?.downloadProgress != null)
+                LinearProgressIndicator(value: app!.downloadProgress! / 100)
+            ],
+          )),
     );
   }
 }

lib/pages/home.dart

@@ -21,21 +21,21 @@ class _HomePageState extends State<HomePage> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-        appBar: AppBar(title: const Text('Obtainium')),
+      appBar: AppBar(title: const Text('Obtainium')),
-        body: pages.elementAt(selectedIndex),
+      body: pages.elementAt(selectedIndex),
-        bottomNavigationBar: NavigationBar(
+      bottomNavigationBar: NavigationBar(
-          destinations: const [
+        destinations: const [
-            NavigationDestination(
+          NavigationDestination(icon: Icon(Icons.settings), label: 'Settings'),
-                icon: Icon(Icons.settings), label: 'Settings'),
+          NavigationDestination(icon: Icon(Icons.apps), label: 'Apps'),
-            NavigationDestination(icon: Icon(Icons.apps), label: 'Apps'),
+          NavigationDestination(icon: Icon(Icons.add), label: 'Add App'),
-            NavigationDestination(icon: Icon(Icons.add), label: 'Add App'),
+        ],
-          ],
+        onDestinationSelected: (int index) {
-          onDestinationSelected: (int index) {
+          setState(() {
-            setState(() {
+            selectedIndex = index;
-              selectedIndex = index;
+          });
-            });
+        },
-          },
+        selectedIndex: selectedIndex,
-          selectedIndex: selectedIndex,
+      ),
-        ));
+    );
   }
 }

lib/services/apps_provider.dart

@@ -72,7 +72,10 @@ class AppsProvider with ChangeNotifier {
     StreamedResponse response =
         await Client().send(Request('GET', Uri.parse(apps[appId]!.app.apkUrl)));
     File downloadFile =
-        File('${(await getTemporaryDirectory()).path}/$appId.apk');
+        File('${(await getExternalStorageDirectory())!.path}/apks/$appId.apk');
+    if (downloadFile.existsSync()) {
+      downloadFile.deleteSync();
+    }
     var length = response.contentLength;
     var received = 0;
     var sink = downloadFile.openWrite();
@@ -94,14 +97,13 @@ class AppsProvider with ChangeNotifier {
       throw response.reasonPhrase ?? 'Unknown Error';
     }
 
-    var res = await InstallPlugin.installApk(
+    // Unfortunately this 'await' does not actually wait for the APK to finish installing
-        downloadFile.path, 'dev.imranr.obtainium');
+    // So we only know that the install prompt was shown, but the user could still cancel w/o us knowing
-    print(res);
+    // This also does not use the 'session-based' installer API, so background/silent updates are impossible
+    await InstallPlugin.installApk(downloadFile.path, 'dev.imranr.obtainium');
 
     apps[appId]!.app.installedVersion = apps[appId]!.app.latestVersion;
     saveApp(apps[appId]!.app);
-
-    downloadFile.deleteSync();
   }
 
   Future<Directory> getAppsDir() async {