打包apk时出现Flutter错误，如何解决？
在我的项目中，使用esysfluttershare插件包在iOS和Android平台上调用系统共享功能。当我使用flutter build apk时，出现错误。怎么解决呢？如果您不能解决问题，是否有其他方法或其他第三方库来调用系统共享功能？
以下是控制台打印
LJM:flu_app_fe vinbeeluo$ flutter build apk
Initializing gradle... 4.6s
Resolving dependencies... 10.6s
注: /Library/flutter/.pub-cache/hosted/pub.flutter-io.cn/esys_flutter_share-1.0.1/android/src/main/java/de/esys/esysfluttershare/EsysFlutterSharePlugin.ava使用了未经检查或不安全的操作。
注: 有关详细信息, 请使用 -Xlint:unchecked 重新编译。
Calling mockable JAR artifact transform to create file: /Users/vinbeeluo/.gradle/caches/transforms-1/files-1.1/android.jar/e2dc5fd512a35e23c34d1e209fd43d11/android.jar with input /Users/vinbeeluo/Library/Android/sdk/platforms/android-28/android.jar
Calling mockable JAR artifact transform to create file: /Users/vinbeeluo/.gradle/caches/transforms-1/files-1.1/android.jar/90bc6d07db5b53f4236cf7be92d2f0d0/android.jar with input /Users/vinbeeluo/Library/Android/sdk/platforms/android-27/android.jar
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':fluttertoast:verifyReleaseResources'.
> java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2Exception: Android resource linking failed
/Users/vinbeeluo/Desktop/Git/flu_app_fe/build/fluttertoast/intermediates/res/merged/release/values-v28/values-v28.xml:7: error: resource android:attr/dialogCornerRadius not found.
/Users/vinbeeluo/Desktop/Git/flu_app_fe/build/fluttertoast/intermediates/res/merged/release/values-v28/values-v28.xml:11: error: resource android:attr/dialogCornerRadius not found.
/Users/vinbeeluo/Desktop/Git/flu_app_fe/build/fluttertoast/intermediates/res/merged/release/values/values.xml:2601: error: resource android:attr/fontVariationSettings not found.
/Users/vinbeeluo/Desktop/Git/flu_app_fe/build/fluttertoast/intermediates/res/merged/release/values/values.xml:2602: error: resource android:attr/ttcIndex not found.
error: failed linking references.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 1m 18s
Running Gradle task 'assembleRelease'...
Running Gradle task 'assembleRelease'... Done 79.3s
Gradle task assembleRelease failed with exit code 1
LJM:flu_app_fe vinbeeluo$