迁移到空安全后无法编译我的应用程序

Question

在调试模式下，我的应用程序正在构建但不是在发布模式下flutter build apk 无法正常工作。编译器在控制台中给出以下错误：

D:\All Data\Softwares\Latest Flutter\flutter\.pub-cache\hosted\pub.dartlang.org\google_maps_flutter-2.0.11\android\src\main\java\io\flutter\plugins\goog
lemaps\GoogleMapsPlugin.java:19: error: cannot find symbol
import io.flutter.embedding.engine.plugins.lifecycle.FlutterLifecycleAdapter;
                                                    ^
  symbol:   class FlutterLifecycleAdapter
  location: package io.flutter.embedding.engine.plugins.lifecycle
D:\All Data\Softwares\Latest Flutter\flutter\.pub-cache\hosted\pub.dartlang.org\google_maps_flutter-2.0.11\android\src\main\java\io\flutter\plugins\goog
lemaps\GoogleMapsPlugin.java:92: error: cannot find symbol
    lifecycle = FlutterLifecycleAdapter.getActivityLifecycle(binding);
                ^
  symbol:   variable FlutterLifecycleAdapter
  location: class GoogleMapsPlugin
Note: D:\All Data\Softwares\Latest Flutter\flutter\.pub-cache\hosted\pub.dartlang.org\google_maps_flutter-2.0.11\android\src\main\java\io\flutter\plugin
s\googlemaps\Convert.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: D:\All Data\Softwares\Latest Flutter\flutter\.pub-cache\hosted\pub.dartlang.org\google_maps_flutter-2.0.11\android\src\main\java\io\flutter\plugin
s\googlemaps\TileProviderController.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
2 errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':google_maps_flutter:compileReleaseJavaWithJavac'.

到目前为止，我尝试过的是：

• 我删除了 pubspec.lock 文件，运行了 flutter clean ，然后再次运行了 flutter pub get。但这并没有帮助。
• GoogleMapsPlugin.java 中显示错误。我编辑了这个文件，它通过删除显示红线，但这也没有帮助。

注意：在迁移到 null 安全性之前，应用程序已完全正常发布。

Answer 1

关闭 Android 工作室 手动删除 Flutter/flutter 中的 .pubcache 文件夹。 请注意，这是一个隐藏文件夹。

然后执行 flutter clean 和 flutter pub get 和 flutter run。它应该可以工作。