getAndroidPackageName method

Implementation

String getAndroidPackageName() {
  // 1. Try reading package attribute from AndroidManifest.xml
  try {
    final manifestContent = FileUtils.readAsString(androidManifestPath);
    final match = RegExp(r'package="([^"]+)"').firstMatch(manifestContent);
    if (match != null && match.group(1) != null) {
      return match.group(1)!;
    }
  } catch (_) {}

  // 2. Try package statement in MainActivity
  try {
    final info = findMainActivity();
    final content = FileUtils.readAsString(info.path);
    final match = RegExp(r'package\s+([a-zA-Z0-9_.]+);?').firstMatch(content);
    if (match != null && match.group(1) != null) {
      return match.group(1)!;
    }
  } catch (_) {}

  // 3. Try reading build.gradle (namespace or applicationId)
  try {
    final buildGradlePath = PathUtils.join(rootPath, 'android', 'app', 'build.gradle');
    if (FileUtils.exists(buildGradlePath)) {
      final content = FileUtils.readAsString(buildGradlePath);
      final match = RegExp(r"""namespace\s+["']([^"']+)["']""").firstMatch(content);
      if (match != null && match.group(1) != null) {
        return match.group(1)!;
      }
      final match2 = RegExp(r"""applicationId\s+["']([^"']+)["']""").firstMatch(content);
      if (match2 != null && match2.group(1) != null) {
        return match2.group(1)!;
      }
    }
  } catch (_) {}

  throw DeepLinkException('Could not resolve Android package name/applicationId.');
}