Fix Android Studio 4.2 detection on Windows (#82484)

packages/flutter_tools/lib/src/android/android_studio.dart

@@ -397,6 +397,30 @@ class AndroidStudio implements Comparable<AndroidStudio> {
       }
     }
 
+    // 4.2 has a different location for AndroidStudio installs on Windows.
+    if (globals.platform.isWindows && globals.platform.environment.containsKey('LOCALAPPDATA')) {
+      final File homeDot = globals.fs.file(globals.fs.path.join(
+        globals.platform.environment['LOCALAPPDATA']!,
+        'Google',
+        'AndroidStudio4.2',
+        '.home',
+      ));
+      if (homeDot.existsSync()) {
+        final String installPath = homeDot.readAsStringSync();
+        if (globals.fs.isDirectorySync(installPath)) {
+          final AndroidStudio studio = AndroidStudio(
+            installPath,
+            version: Version(4, 2, 0),
+            studioAppName: 'Android Studio 4.2',
+          );
+          if (studio != null && !_hasStudioAt(studio.directory, newerThan: studio.version)) {
+            studios.removeWhere((AndroidStudio other) => other.directory == studio.directory);
+            studios.add(studio);
+          }
+        }
+      }
+    }
+
     final String? configuredStudioDir = globals.config.getValue('android-studio-dir') as String?;
     if (configuredStudioDir != null && !_hasStudioAt(configuredStudioDir)) {
       studios.add(AndroidStudio(configuredStudioDir,

packages/flutter_tools/test/general.shard/android/android_studio_test.dart

@@ -409,6 +409,24 @@ void main() {
     ProcessManager: () => FakeProcessManager.any(),
   });
 
+  testUsingContext('Can discover Android Studio 4.2 location on Windows', () {
+    windowsFileSystem.file(r'C:\Users\Dash\AppData\Local\Google\AndroidStudio4.2\.home')
+      ..createSync(recursive: true)
+      ..writeAsStringSync(r'C:\Program Files\AndroidStudio');
+    windowsFileSystem
+      .directory(r'C:\Program Files\AndroidStudio')
+      .createSync(recursive: true);
+
+    final AndroidStudio studio = AndroidStudio.allInstalled().single;
+
+    expect(studio.version, Version(4, 2, 0));
+    expect(studio.studioAppName, 'Android Studio 4.2');
+  }, overrides: <Type, Generator>{
+    Platform: () => windowsPlatform,
+    FileSystem: () => windowsFileSystem,
+    ProcessManager: () => FakeProcessManager.any(),
+  });
+
   testUsingContext('Does not discover Android Studio 4.1 location on Windows if LOCALAPPDATA is null', () {
     windowsFileSystem.file(r'C:\Users\Dash\AppData\Local\Google\AndroidStudio4.1\.home')
       ..createSync(recursive: true)
@@ -427,6 +445,24 @@ void main() {
     ProcessManager: () => FakeProcessManager.any(),
   });
 
+  testUsingContext('Does not discover Android Studio 4.2 location on Windows if LOCALAPPDATA is null', () {
+    windowsFileSystem.file(r'C:\Users\Dash\AppData\Local\Google\AndroidStudio4.2\.home')
+      ..createSync(recursive: true)
+      ..writeAsStringSync(r'C:\Program Files\AndroidStudio');
+    windowsFileSystem
+      .directory(r'C:\Program Files\AndroidStudio')
+      .createSync(recursive: true);
+
+    expect(AndroidStudio.allInstalled(), isEmpty);
+  }, overrides: <Type, Generator>{
+    Platform: () => FakePlatform(
+      operatingSystem: 'windows',
+      environment: <String, String>{}, // Does not include LOCALAPPDATA
+    ),
+    FileSystem: () => windowsFileSystem,
+    ProcessManager: () => FakeProcessManager.any(),
+  });
+
   group('Installation detection on Linux', () {
     FileSystemUtils fsUtils;