Flutter中构建apk时的多个问题
Multiple problems when building apk in Flutter
这可能是重复的，但我和其他一些人一直无法通过 our app.
找到解决此构建问题的方法
一段时间以来，我们收到了关于已弃用库的注释和警告，但似乎这个新问题现在完全阻止了构建（下面的完整输出）：
major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
一个重要的警告是 flutter build appbundle --target-platform android-arm,android-arm64,android-x64 工作正常，只是显示已弃用的注释。
我应该怎么做才能修复 apk 构建；如果问题出在上面，我该如何更新编译器？如何更新已弃用的库？
我正在使用带有 Flutter 和 Dart 插件的 Visual Studio 代码，这是我的 flutter doctor 输出（none 的警告是相关的）：
[√] Flutter (Channel beta, 1.22.0-12.1.pre, on Microsoft Windows [Version 10.0.18363.1139], locale hu-HU)
• Flutter version 1.22.0-12.1.pre at C:\Users\fodor\Documents\_Android\FlutterSDK\flutter
• Framework revision 8b3760638a (7 weeks ago), 2020-09-15 17:47:13 -0700
• Engine revision 4654fc6cf6
• Dart version 2.10.0 (build 2.10.0-110.3.beta)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
• Android SDK at C:\Users\fodor\AppData\Local\Android\sdk
• Platform android-30, build-tools 30.0.2
• Java binary at: C:\Program Files\Android\Android Studio1\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
• All Android licenses accepted.
[!] Android Studio (version 4.0)
• Android Studio at C:\Program Files\Android\Android Studio1
X Flutter plugin not installed; this adds Flutter specific functionality.
X Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
[√] VS Code, 64-bit edition (version 1.50.1)
• VS Code at C:\Program Files\Microsoft VS Code
• Flutter extension version 3.16.0
[!] Connected device
! No devices available
! Doctor found issues in 2 categories.
完整输出：
PS C:\Users\fodor\Documents\_Android\Flutter\_FILC4\filcnaplo> flutter build apk --release
You are building a fat APK that includes binaries for android-arm, android-arm64, android-x64.
If you are deploying the app to the Play Store, it's recommended to use app bundles or split the APK to reduce the
APK size.
To generate an app bundle, run:
flutter build appbundle --target-platform android-arm,android-arm64,android-x64
Learn more on: https://developer.android.com/guide/app-bundle
To split the APKs per ABI, run:
flutter build apk --target-platform android-arm,android-arm64,android-x64 --split-per-abi
Learn more on: https://developer.android.com/studio/build/configure-apk-splits#configure-abi-split
Note: C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\downloads_path_provider-0.1.0\android\src\main\java\it\nplace\downloadspathprovider\DownloadsPathProviderPlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\file_picker-1.13.3\android\src\main\java\com\mr\flutter\plugin\filepicker\FileUtils.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\image_cropper-1.3.1\android\src\main\java\vn\hunghd\flutter\plugins\imagecropper\FileUtils.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
warning: C:\Users\fodor\AppData\Local\Android\sdk\build-tools.0.0\core-lambda-stubs.jar(java/lang/invoke/LambdaMetafactory.class): major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
1 warning
warning: C:\Users\fodor\AppData\Local\Android\sdk\build-tools.0.0\core-lambda-stubs.jar(java/lang/invoke/LambdaMetafactory.class): major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
1 warning
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\sqflite-1.3.1+2\android\src\main\java\com\tekartik\sqflite\SqflitePlugin.java:1043: warning: [deprecation] Handler() in Handler has been deprecated
final Handler handler = new Handler();
^
1 warning
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:9: warning: [deprecation] AsyncTask in android.os has been deprecated
import android.os.AsyncTask;
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:121: warning: [deprecation] AsyncTask in android.os has been deprecated
new AsyncTask<Void, Void, Boolean>() {
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:121: warning: [deprecation] AsyncTask() in AsyncTask has been deprecated
new AsyncTask<Void, Void, Boolean>() {
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:123: warning: [deprecation] doInBackground(Params...) in AsyncTask has been deprecated
protected Boolean doInBackground(Void... voids) {
^
where Params,Result are type-variables:
Params extends Object declared in class AsyncTask
Result extends Object declared in class AsyncTask
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:121: warning: [deprecation] AsyncTask() in AsyncTask has been deprecated
new AsyncTask<Void, Void, Boolean>() {
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:128: warning: [deprecation] onPostExecute(Result) in AsyncTask has been deprecated
protected void onPostExecute(Boolean value) {
^
where Result is a type-variable:
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:131: warning: [deprecation] execute(Params...) in AsyncTask has been deprecated
}.execute();
where Params,Progress,Result are type-variables:
Params extends Object declared in class AsyncTask
Progress extends Object declared in class AsyncTask
Result extends Object declared in class AsyncTask
7 warnings
warning: C:\Users\fodor\AppData\Local\Android\sdk\build-tools.0.0\core-lambda-stubs.jar(java/lang/invoke/LambdaMetafactory.class): major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
error: warnings found and -Werror specified
1 error
1 warning
* What went wrong:
Execution failed for task ':video_player:compileReleaseJavaWithJavac'.
> 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 1m 37s
Running Gradle task 'assembleRelease'...
Running Gradle task 'assembleRelease'... Done 98,4s
Gradle task assembleRelease failed with exit code 1
感谢您的帮助。
如果您仔细阅读输出，它表示（唯一的）错误是存在警告，并且由于编译选项 -Werror，它们被视为错误。也许只是删除 -Werror 选项？
新的 SDK 版本乱七八糟，我在没有意识到问题的路由原因的情况下发布了这个答案。无论哪种方式，这都应该有效：
将此放在您的 buid.gradle allprojects{} 部分之后：
subprojects {
afterEvaluate {project ->
if (project.plugins.hasPlugin('android') || project.plugins.hasPlugin('android-library')) {
android {
compileSdkVersion 29
buildToolsVersion '29.0.0'
}
}
}
}
这可能是重复的，但我和其他一些人一直无法通过 our app.
找到解决此构建问题的方法一段时间以来，我们收到了关于已弃用库的注释和警告，但似乎这个新问题现在完全阻止了构建（下面的完整输出）：
major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
一个重要的警告是 flutter build appbundle --target-platform android-arm,android-arm64,android-x64 工作正常，只是显示已弃用的注释。
我应该怎么做才能修复 apk 构建；如果问题出在上面，我该如何更新编译器？如何更新已弃用的库？
我正在使用带有 Flutter 和 Dart 插件的 Visual Studio 代码，这是我的 flutter doctor 输出（none 的警告是相关的）：
[√] Flutter (Channel beta, 1.22.0-12.1.pre, on Microsoft Windows [Version 10.0.18363.1139], locale hu-HU)
• Flutter version 1.22.0-12.1.pre at C:\Users\fodor\Documents\_Android\FlutterSDK\flutter
• Framework revision 8b3760638a (7 weeks ago), 2020-09-15 17:47:13 -0700
• Engine revision 4654fc6cf6
• Dart version 2.10.0 (build 2.10.0-110.3.beta)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
• Android SDK at C:\Users\fodor\AppData\Local\Android\sdk
• Platform android-30, build-tools 30.0.2
• Java binary at: C:\Program Files\Android\Android Studio1\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
• All Android licenses accepted.
[!] Android Studio (version 4.0)
• Android Studio at C:\Program Files\Android\Android Studio1
X Flutter plugin not installed; this adds Flutter specific functionality.
X Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
[√] VS Code, 64-bit edition (version 1.50.1)
• VS Code at C:\Program Files\Microsoft VS Code
• Flutter extension version 3.16.0
[!] Connected device
! No devices available
! Doctor found issues in 2 categories.
完整输出：
PS C:\Users\fodor\Documents\_Android\Flutter\_FILC4\filcnaplo> flutter build apk --release
You are building a fat APK that includes binaries for android-arm, android-arm64, android-x64.
If you are deploying the app to the Play Store, it's recommended to use app bundles or split the APK to reduce the
APK size.
To generate an app bundle, run:
flutter build appbundle --target-platform android-arm,android-arm64,android-x64
Learn more on: https://developer.android.com/guide/app-bundle
To split the APKs per ABI, run:
flutter build apk --target-platform android-arm,android-arm64,android-x64 --split-per-abi
Learn more on: https://developer.android.com/studio/build/configure-apk-splits#configure-abi-split
Note: C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\downloads_path_provider-0.1.0\android\src\main\java\it\nplace\downloadspathprovider\DownloadsPathProviderPlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\file_picker-1.13.3\android\src\main\java\com\mr\flutter\plugin\filepicker\FileUtils.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\image_cropper-1.3.1\android\src\main\java\vn\hunghd\flutter\plugins\imagecropper\FileUtils.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
warning: C:\Users\fodor\AppData\Local\Android\sdk\build-tools.0.0\core-lambda-stubs.jar(java/lang/invoke/LambdaMetafactory.class): major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
1 warning
warning: C:\Users\fodor\AppData\Local\Android\sdk\build-tools.0.0\core-lambda-stubs.jar(java/lang/invoke/LambdaMetafactory.class): major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
1 warning
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\sqflite-1.3.1+2\android\src\main\java\com\tekartik\sqflite\SqflitePlugin.java:1043: warning: [deprecation] Handler() in Handler has been deprecated
final Handler handler = new Handler();
^
1 warning
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:9: warning: [deprecation] AsyncTask in android.os has been deprecated
import android.os.AsyncTask;
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:121: warning: [deprecation] AsyncTask in android.os has been deprecated
new AsyncTask<Void, Void, Boolean>() {
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:121: warning: [deprecation] AsyncTask() in AsyncTask has been deprecated
new AsyncTask<Void, Void, Boolean>() {
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:123: warning: [deprecation] doInBackground(Params...) in AsyncTask has been deprecated
protected Boolean doInBackground(Void... voids) {
^
where Params,Result are type-variables:
Params extends Object declared in class AsyncTask
Result extends Object declared in class AsyncTask
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:121: warning: [deprecation] AsyncTask() in AsyncTask has been deprecated
new AsyncTask<Void, Void, Boolean>() {
^
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:128: warning: [deprecation] onPostExecute(Result) in AsyncTask has been deprecated
protected void onPostExecute(Boolean value) {
^
where Result is a type-variable:
C:\Users\fodor\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\shared_preferences-0.5.12+2\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:131: warning: [deprecation] execute(Params...) in AsyncTask has been deprecated
}.execute();
where Params,Progress,Result are type-variables:
Params extends Object declared in class AsyncTask
Progress extends Object declared in class AsyncTask
Result extends Object declared in class AsyncTask
7 warnings
warning: C:\Users\fodor\AppData\Local\Android\sdk\build-tools.0.0\core-lambda-stubs.jar(java/lang/invoke/LambdaMetafactory.class): major version 53 is newer than 52, the highest major version supported by this compiler.
It is recommended that the compiler be upgraded.
error: warnings found and -Werror specified
1 error
1 warning
* What went wrong:
Execution failed for task ':video_player:compileReleaseJavaWithJavac'.
> 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 1m 37s
Running Gradle task 'assembleRelease'...
Running Gradle task 'assembleRelease'... Done 98,4s
Gradle task assembleRelease failed with exit code 1
感谢您的帮助。
如果您仔细阅读输出，它表示（唯一的）错误是存在警告，并且由于编译选项 -Werror，它们被视为错误。也许只是删除 -Werror 选项？
新的 SDK 版本乱七八糟，我在没有意识到问题的路由原因的情况下发布了这个答案。无论哪种方式，这都应该有效：
将此放在您的 buid.gradle allprojects{} 部分之后：
subprojects {
afterEvaluate {project ->
if (project.plugins.hasPlugin('android') || project.plugins.hasPlugin('android-library')) {
android {
compileSdkVersion 29
buildToolsVersion '29.0.0'
}
}
}
}