Fixed null error for imported Apps (#476)

lib/main.dart

@@ -21,7 +21,7 @@ import 'package:easy_localization/src/easy_localization_controller.dart';
 // ignore: implementation_imports
 import 'package:easy_localization/src/localization.dart';
 
-const String currentVersion = '0.11.33';
+const String currentVersion = '0.11.34';
 const String currentReleaseTag =
     'v$currentVersion-beta'; // KEEP THIS IN SYNC WITH GITHUB RELEASES
 

lib/providers/apps_provider.dart

@@ -204,7 +204,8 @@ class AppsProvider with ChangeNotifier {
       // The former case should be handled (give the App its real ID), the latter is a security issue
       var newInfo = await PackageArchiveInfo.fromPath(downloadedFile.path);
       if (app.id != newInfo.packageName) {
-        if (apps[app.id] != null && !SourceProvider().isTempId(app)) {
+        var isTempId = SourceProvider().isTempId(app);
+        if (apps[app.id] != null && !isTempId) {
           throw IDChangedError();
         }
         var originalAppId = app.id;
@@ -213,7 +214,7 @@ class AppsProvider with ChangeNotifier {
             '${downloadedFile.parent.path}/${app.id}-${downloadUrl.hashCode}.apk');
         if (apps[originalAppId] != null) {
           await removeApps([originalAppId]);
-          await saveApps([app]);
+          await saveApps([app], onlyIfExists: !isTempId);
         }
       }
       return DownloadedApk(app.id, downloadedFile);

pubspec.yaml

@@ -17,7 +17,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 0.11.33+155 # When changing this, update the tag in main() accordingly
+version: 0.11.34+156 # When changing this, update the tag in main() accordingly
 
 environment:
   sdk: '>=2.18.2 <3.0.0'