Fix the diagnostics where there is a JDK version mismatch

The output looks like:

Gradle execution failed.

1. The most likely cause is that the Android build is not yet cached.

Run `flutter build apk` in example/ and try again.

2. If the Gradle output includes text like this:

* What went wrong:
Execution failed for task ':gradle:compileGroovy'.
> BUG! exception in phase 'semantic analysis' ...  Unsupported class file major version

Then the JDK versions used by jnigen and flutter are not compatible. Try
changing the default JDK version e.g. with `export JAVA_VERSION=11` on macOS and
`sudo update-alternatives --config java` on Ubuntu.

GRADLE OUTPUT:
--------------------------------------------------------------------------------

Gradle stub cannot find JAR libraries. This might be because no APK build has happened yet.
If you are seeing this error in `flutter build` output, it is likely that `jnigen` left some stubs in the build.gradle file. Please restore that file from your version control system or manually remove the stub functions named getReleaseCompileClasspath and / or getSources.

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/bquinlan/dart/http/pkgs/ok_http/example/android/build.gradle' line: 29

* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all files for configuration ':app:releaseCompileClasspath'.
   > Failed to transform libs.jar to match attributes {artifactType=android-classes-jar, org.gradle.libraryelements=jar, org.gradle.usage=java-runtime}.
      > Execution failed for JetifyTransform: /Users/bquinlan/dart/http/pkgs/ok_http/example/build/app/intermediates/flutter/release/libs.jar.
         > Transform's input file does not exist: /Users/bquinlan/dart/http/pkgs/ok_http/example/build/app/intermediates/flutter/release/libs.jar. (See https://issuetracker.google.com/issues/158753935)

* 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 3s

--------------------------------------------------------------------------------

#0      AndroidSdkTools._runGradleStub (package:jnigen/src/tools/android_sdk_tools.dart:207:7)
#1      AndroidSdkTools.getGradleClasspaths (package:jnigen/src/tools/android_sdk_tools.dart:144:7)
#2      getSummary (package:jnigen/src/summary/summary.dart:136:34)
#3      generateJniBindings (package:jnigen/src/generate_bindings.dart:30:21)
<asynchronous suspension>
#4      main (file:///Users/bquinlan/dart/native/pkgs/jnigen/bin/jnigen.dart:18:3)
<asynchronous suspension>

It would be worth cleaning up the traceback in a follow-up PR. That might be as easy as changing generate_bindings.dart:

  try {
    classes = await getSummary(config);
  } on SummaryParseException catch (e) {
    if (e.stderr != null) {
      printError(e.stderr);
    }
    log.fatal(e.message);
-  }
+  } on GradleException catch (e) {
+    log.fatal(e.message);
+  }

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``` // Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file // for details. All rights reserved. Use of this source code is governed by a // BSD-style license that can be found in the LICENSE file. ``` | Files | | :--- | | _no missing headers_ | All source files should start with a [license header](https://github.com/dart-lang/ecosystem/wiki/License-Header).

Unrelated files missing license headers

| Files | | :--- | |pkgs/ffigen/example/libclang-example/generated_bindings.dart| |pkgs/ffigen/example/shared_bindings/generate.dart| |pkgs/ffigen/example/shared_bindings/lib/generated/a_gen.dart| |pkgs/ffigen/example/shared_bindings/lib/generated/a_shared_b_gen.dart| |pkgs/ffigen/example/shared_bindings/lib/generated/base_gen.dart| |pkgs/ffigen/example/simple/generated_bindings.dart| |pkgs/ffigen/lib/src/header_parser/clang_bindings/clang_bindings.dart| |pkgs/ffigen/test/collision_tests/expected_bindings/_expected_decl_decl_collision_bindings.dart| |pkgs/ffigen/test/collision_tests/expected_bindings/_expected_decl_symbol_address_collision_bindings.dart| |pkgs/ffigen/test/collision_tests/expected_bindings/_expected_decl_type_name_collision_bindings.dart| |pkgs/ffigen/test/collision_tests/expected_bindings/_expected_reserved_keyword_collision_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_comment_markup_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_dart_handle_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_enum_int_mimic_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_forward_decl_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_functions_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_imported_types_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_native_func_typedef_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_opaque_dependencies_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_packed_structs_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_regress_384_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_sort_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_struct_fptr_fields_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_typedef_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_unions_bindings.dart| |pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_varargs_bindings.dart| |pkgs/ffigen/test/large_integration_tests/_expected_cjson_bindings.dart| |pkgs/ffigen/test/large_integration_tests/_expected_libclang_bindings.dart| |pkgs/ffigen/test/large_integration_tests/_expected_sqlite_bindings.dart| |pkgs/ffigen/test/native_test/_expected_native_test_bindings.dart| |pkgs/jni/lib/src/third_party/generated_bindings.dart| |pkgs/jni/lib/src/third_party/global_env_extensions.dart| |pkgs/jni/lib/src/third_party/jni_bindings_generated.dart| |pkgs/jnigen/android_test_runner/lib/main.dart| |pkgs/jnigen/example/in_app_java/lib/android_utils.dart| |pkgs/jnigen/example/kotlin_plugin/example/lib/main.dart| |pkgs/jnigen/example/kotlin_plugin/lib/kotlin_bindings.dart| |pkgs/jnigen/example/kotlin_plugin/lib/kotlin_plugin.dart| |pkgs/jnigen/example/pdfbox_plugin/lib/pdfbox_plugin.dart| |pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/pdmodel/PDDocument.dart| |pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/pdmodel/PDDocumentInformation.dart| |pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/pdmodel/_package.dart| |pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/text/PDFTextStripper.dart| |pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/text/_package.dart| |pkgs/jnigen/lib/src/bindings/descriptor.dart| |pkgs/jnigen/lib/src/elements/elements.g.dart| |pkgs/jnigen/test/jackson_core_test/third_party/bindings/com/fasterxml/jackson/core/_package.dart| |pkgs/jnigen/tool/command_runner.dart| |pkgs/native_assets_builder/test_data/native_dynamic_linking/bin/native_dynamic_linking.dart| |pkgs/objective_c/lib/src/ns_input_stream.dart| |pkgs/swift2objc/lib/src/config.dart| |pkgs/swift2objc/lib/src/generate_wrapper.dart| |pkgs/swift2objc/lib/src/generator/_core/utils.dart| |pkgs/swift2objc/lib/src/generator/generator.dart| |pkgs/swift2objc/lib/src/generator/generators/class_generator.dart| |pkgs/swift2objc/lib/src/parser/parsers/declaration_parsers/parse_initializer_declaration.dart| |pkgs/swift2objc/lib/src/parser/parsers/declaration_parsers/parse_variable_declaration.dart| |pkgs/swift2objc/lib/src/transformer/_core/unique_namer.dart| |pkgs/swift2objc/lib/src/transformer/_core/utils.dart| |pkgs/swift2objc/lib/src/transformer/transformers/transform_globals.dart| |pkgs/swift2objc/lib/src/transformer/transformers/transform_variable.dart| |pkgs/swift2objc/test/unit/parse_initializer_param_test.dart|

dart-lang / native

Fix the diagnostics where there is a JDK version mismatch #1709

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