Fix path name to discover debug apk on add2app builds (#117999)

Author: GaryQian

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

@@ -115,7 +115,13 @@ class AndroidApk extends ApplicationPackage implements PrebuiltApplicationPackag
     }
 
     if (androidProject.isUsingGradle && androidProject.isSupportedVersion) {
-      apkFile = getApkDirectory(androidProject.parent).childFile(filename);
+      Directory apkDirectory = getApkDirectory(androidProject.parent);
+      if (androidProject.parent.isModule) {
+        // Module builds output the apk in a subdirectory that corresponds
+        // to the buildmode of the apk.
+        apkDirectory = apkDirectory.childDirectory(buildInfo!.mode.name);
+      }
+      apkFile = apkDirectory.childFile(filename);
       if (apkFile.existsSync()) {
         // Grab information from the .apk. The gradle build script might alter
         // the application Id, so we need to look at what was actually built.

packages/flutter_tools/test/general.shard/application_package_test.dart

@@ -55,6 +55,73 @@ void main() {
       ).path).createSync(recursive: true);
     });
 
+    testUsingContext('correct debug filename in module projects', () async {
+      const String aaptPath = 'aaptPath';
+      final File apkFile = globals.fs.file('app-debug.apk');
+      final FakeAndroidSdkVersion sdkVersion = FakeAndroidSdkVersion();
+      sdkVersion.aaptPath = aaptPath;
+      sdk.latestVersion = sdkVersion;
+      sdk.platformToolsAvailable = true;
+      sdk.licensesAvailable = false;
+
+      fakeProcessManager.addCommand(
+        FakeCommand(
+          command: <String>[
+            aaptPath,
+            'dump',
+            'xmltree',
+             apkFile.path,
+            'AndroidManifest.xml',
+          ],
+          stdout: _aaptDataWithDefaultEnabledAndMainLauncherActivity
+        )
+      );
+
+      fakeProcessManager.addCommand(
+        FakeCommand(
+          command: <String>[
+            aaptPath,
+            'dump',
+            'xmltree',
+             fs.path.join('module_project', 'build', 'host', 'outputs', 'apk', 'debug', 'app-debug.apk'),
+            'AndroidManifest.xml',
+          ],
+          stdout: _aaptDataWithDefaultEnabledAndMainLauncherActivity
+        )
+      );
+
+      await ApplicationPackageFactory.instance!.getPackageForPlatform(
+        TargetPlatform.android_arm,
+        applicationBinary: apkFile,
+      );
+      final BufferLogger logger = BufferLogger.test();
+      final FlutterProject project = await aModuleProject();
+      project.android.hostAppGradleRoot.childFile('build.gradle').createSync(recursive: true);
+      final File appGradle = project.android.hostAppGradleRoot.childFile(
+        fs.path.join('app', 'build.gradle'));
+      appGradle.createSync(recursive: true);
+      appGradle.writeAsStringSync("def flutterPluginVersion = 'managed'");
+      final File apkDebugFile = project.directory
+        .childDirectory('build')
+        .childDirectory('host')
+        .childDirectory('outputs')
+        .childDirectory('apk')
+        .childDirectory('debug')
+        .childFile('app-debug.apk');
+      apkDebugFile.createSync(recursive: true);
+      final AndroidApk? androidApk = await AndroidApk.fromAndroidProject(
+        project.android,
+        androidSdk: sdk,
+        processManager: fakeProcessManager,
+        userMessages:  UserMessages(),
+        processUtils: ProcessUtils(processManager: fakeProcessManager, logger: logger),
+        logger: logger,
+        fileSystem: fs,
+        buildInfo: const BuildInfo(BuildMode.debug, null, treeShakeIcons: false),
+      );
+      expect(androidApk, isNotNull);
+    }, overrides: overrides);
+
     testUsingContext('Licenses not available, platform and buildtools available, apk exists', () async {
       const String aaptPath = 'aaptPath';
       final File apkFile = globals.fs.file('app-debug.apk');
@@ -895,3 +962,19 @@ class FakeAndroidSdkVersion extends Fake implements AndroidSdkVersion {
   @override
   late String aaptPath;
 }
+
+Future<FlutterProject> aModuleProject() async {
+  final Directory directory = globals.fs.directory('module_project');
+  directory
+    .childDirectory('.dart_tool')
+    .childFile('package_config.json')
+    ..createSync(recursive: true)
+    ..writeAsStringSync('{"configVersion":2,"packages":[]}');
+  directory.childFile('pubspec.yaml').writeAsStringSync('''
+name: my_module
+flutter:
+  module:
+    androidPackage: com.example
+''');
+  return FlutterProject.fromDirectory(directory);
+}