flutter_umeng_analytics build error

在as下编译报错：

Launching lib\main.dart on SM G9500 in debug mode...
Initializing gradle...
Resolving dependencies...
Running Gradle task 'assembleDebug'...
D:\software\flutter\.pub-cache\hosted\pub.flutter-io.cn\flutter_umeng_analytics-0.0.2\android\src\main\java\pedia\flutterumenganalytics\FlutterUmengAnalyticsPlugin.java:5: ����: �����com.umeng.analytics������
import com.umeng.analytics.*;
^
D:\software\flutter\.pub-cache\hosted\pub.flutter-io.cn\flutter_umeng_analytics-0.0.2\android\src\main\java\pedia\flutterumenganalytics\FlutterUmengAnalyticsPlugin.java:31: ����: �Ҳ�������
      MobclickAgent.onPageStart((String) call.argument("name"));
      ^
  ����:   ��� MobclickAgent
  λ��: �� FlutterUmengAnalyticsPlugin
D:\software\flutter\.pub-cache\hosted\pub.flutter-io.cn\flutter_umeng_analytics-0.0.2\android\src\main\java\pedia\flutterumenganalytics\FlutterUmengAnalyticsPlugin.java:34: ����: �Ҳ�������
      MobclickAgent.onPageEnd((String) call.argument("name"));
      ^
  ����:   ��� MobclickAgent
  λ��: �� FlutterUmengAnalyticsPlugin
D:\software\flutter\.pub-cache\hosted\pub.flutter-io.cn\flutter_umeng_analytics-0.0.2\android\src\main\java\pedia\flutterumenganalytics\FlutterUmengAnalyticsPlugin.java:37: ����: �Ҳ�������
      MobclickAgent.onEvent((Context) activity, (String) call.argument("name"));
      ^
  ����:   ��� MobclickAgent
  λ��: �� FlutterUmengAnalyticsPlugin
D:\software\flutter\.pub-cache\hosted\pub.flutter-io.cn\flutter_umeng_analytics-0.0.2\android\src\main\java\pedia\flutterumenganalytics\FlutterUmengAnalyticsPlugin.java:45: ����: �����MobclickAgent������
    MobclickAgent.UMAnalyticsConfig config =
                 ^
D:\software\flutter\.pub-cache\hosted\pub.flutter-io.cn\flutter_umeng_analytics-0.0.2\android\src\main\java\pedia\flutterumenganalytics\FlutterUmengAnalyticsPlugin.java:46: ����: �����MobclickAgent������
        new MobclickAgent.UMAnalyticsConfig(
                         ^
D:\software\flutter\.pub-cache\hosted\pub.flutter-io.cn\flutter_umeng_analytics-0.0.2\android\src\main\java\pedia\flutterumenganalytics\FlutterUmengAnalyticsPlugin.java:49: ����: �Ҳ�������
    MobclickAgent.startWithConfigure(config);
    ^
  ����:   ��� MobclickAgent
  λ��: �� FlutterUmengAnalyticsPlugin
7 ������

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':flutter_umeng_analytics:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* 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 57s
Finished with error: Gradle task assembleDebug failed with exit code 1

flutter环境信息：

[√] Flutter (Channel stable, v1.5.4-hotfix.2, on Microsoft Windows [Version 10.0.17134.472], locale zh-CN)
    • Flutter version 1.5.4-hotfix.2 at D:\software\flutter
    • Framework revision 7a4c33425d (8 weeks ago), 2019-04-29 11:05:24 -0700
    • Engine revision 52c7a1e849
    • Dart version 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)


[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at D:\software\Android\Sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • ANDROID_HOME = D:\software\Android\Sdk
    • Java binary at: D:\software\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    • All Android licenses accepted.

[√] Android Studio (version 3.2)
    • Android Studio at D:\software\Android\Android Studio
    • Flutter plugin version 31.3.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[√] Connected device (1 available)
    • SM G9500 • 98895a45473444434f • android-arm64 • Android 8.0.0 (API 26)

• No issues found!