Parameter specified as non-null is null: method com.flutter.gradle.VersionUtils.mostRecentSemanticVersion, parameter....

记一次flutter编译报错的问题.

我的pubspec.yaml中引入了better_player_plus和flutter_vlc_player，配置是：

...
dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.8
  better_player_plus: ^1.0.8
  flutter_vlc_player: ^7.4.3

dev_dependencies:
  flutter_test:
    sdk: flutter
...

问题1

Launching lib/main.dart on sdk gphone64 x86 64 in debug mode...
Running Gradle task 'assembleDebug'...
Warning: Flutter support for your project's Android Gradle Plugin version (Android Gradle Plugin version 8.1.0) will soon be dropped. Please upgrade your Android Gradle Plugin version to a version of at least Android Gradle Plugin version 8.3.0 soon.
Alternatively, use the flag "--android-skip-build-dependency-validation" to bypass this check.

Potential fix: Your project's AGP version is typically defined in the plugins block of the settings.gradle file (/Users/edy/Desktop/test/android/settings.gradle), by a plugin with the id of com.android.application.
If you don't see a plugins block, your project was likely created with an older template version. In this case it is most likely defined in the top-level build.gradle file (/Users/edy/Desktop/test/android/build.gradle) by the following line in the dependencies block of the buildscript: "classpath 'com.android.tools.build:gradle:'".

FAILURE: Build failed with an exception.

• What went wrong:
  A problem occurred configuring project ':better_player_plus'.
  Parameter specified as non-null is null: method com.flutter.gradle.VersionUtils.mostRecentSemanticVersion, parameter version1

• 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 15s
Error: Gradle task assembleDebug failed with exit code 1

报错截图：

这个问题出现在我使用了flutter的库：flutter_vlc_player: ^7.4.3，但我本地的flutter sdk环境是3.27.0-0.1.pre的问题.

在运行Android的时候，我Android studio中默认的gradle默认是8.1.0的，所以也会有警告.

解决办法

• 1. 升级本地的flutter sdk

flutter channel beta # 切换到最新的beta channel

• 2. 更新dart版本
     之前是

...
environment:
  sdk: ^3.6.0-216.1.beta
...

升级后：

...
environment:
  sdk: ^3.7.0
...

• 3. 配置android/settings.gradle
     之前：

...
plugins {
    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
    id "com.android.application" version "8.1.0" apply false
    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
}

include ":app"

配置后：

...
plugins {
    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
    id "com.android.application" version "8.3.0" apply false // 升级这里
    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
}

include ":app"

到这一步，再编译会有新的报错，错误在下面贴出来，并解决。

问题2

Launching lib/main.dart on sdk gphone64 x86 64 in debug mode...
Running Gradle task 'assembleDebug'...

FAILURE: Build failed with an exception.

• Where:
  Build file '/Users/edy/Desktop/test/android/app/build.gradle' line: 2

• What went wrong:
  An exception occurred applying plugin request [id: 'com.android.application']
  Failed to apply plugin 'com.android.internal.version-check'.
  Minimum supported Gradle version is 8.4. Current version is 8.3. If using the gradle wrapper, try editing the distributionUrl in /Users/edy/Desktop/test/android/gradle/wrapper/gradle-wrapper.properties to gradle-8.4-all.zip

• 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 27s
Error: Gradle task assembleDebug failed with exit code 1

问题截图：

从截图中已经看出解决办法了，提示我们要修改gradle-wrapper.properties的版本

解决办法

修改android/gradle/wrapper/gradle-wrapper.properties配置
之前配置是：

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip

更新配置后：

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-all.zip

再次运行，问题解决了。

希望对大家有借鉴意义。