url_launcher插入flutter时出现问题

Question

我正在使用url_launcher的项目上工作，尽管它会引发这些错误，但在我的设备上也能正常工作，当我尝试构建apk应用程序时会引发此错误

    Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: D:\Programs\flutter\.pub-cache\hosted\pub.dartlang.org\webview_media-0.1.2\android\src\main\java\io\flutter\plugins\webviewflutter\FlutterWebView.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: D:\Programs\flutter\.pub-cache\hosted\pub.dartlang.org\url_launcher-5.4.10\android\src\main\java\io\flutter\plugins\urllauncher\WebViewActivity.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

有什么问题，我该如何解决？

my pubspec.yamel 


version: 1.0.0+1

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  bot_toast: ^3.0.0
  url_launcher: ^5.4.10
  device_preview: ^0.4.5
  flutter_launcher_icons: ^0.7.5
  cupertino_icons: ^0.1.2
  rflutter_alert: ^1.0.3
  youtube_player_flutter: ^6.1.1
  # animated_text_kit: ^2.0.0
  # google_fonts: ^0.3.2

dev_dependencies:
  flutter_test:
    sdk: flutter