ROM-libcore中新加java文件编译报错
背景:
1.安卓9之前,libcore中有一个libcore/io/EventLogger.java，但是安卓10之后却没有了
2.EventLogger可以将进程中所有的event事件，收敛到这里，所以可以在代码中任何地方加埋点，然后简单调用writeEvent
public static void writeEvent(int code, Object... list) {getReporter().report(code, list);}
代码改动:
Aosp android-11
添加 libcore/luni/src/main/java/libcore/util/EventCallback.java
添加 libcore/luni/src/main/java/libcore/util/EventTag.java
编译报错(代码规范相关)
metalava detected access to files that are not explicitly specified. See /data00/home/liuzhuangzhuang.das/work/aosp_sunfish/aosp/out/soong/.intermediates/frameworks/base/api-stubs-docs/android_common/api-stubs-docs-violations.txt for details.
$************************************************************\nYour API changes are triggering API Lint warnings or errors.\nTo make these errors go away, fix the code according to the\nerror and/or warning messages above.\n\nIf it is not possible to do so, there are workarounds:\n\n1. You can suppress the errors with @SuppressLint("<id>")\n2. You can update the baseline by executing the following\n command:\n cp \\\n "/data00/home/liuzhuangzhuang.das/work/aosp_sunfish/aosp$/out/soong/.intermediates/frameworks/base/api-stubs-docs/android_common/api_lint_baseline.txt" \\\n "/data00/home/liuzhuangzhuang.das/work/aosp_sunfish/aosp$/frameworks/base/api/lint-baseline.txt"\n To submit the revised baseline.txt to the main Android\n repository, you will need approval.\n************************************************************\n
18:05:51 ninja failed with: exit status 1
把tools/metalava/API-LINT.md文件中拿出来，看看相关报错如何解决
API Lint
Metalava can optionally run warn about various API problems based on the Android
API Council’s guidelines, described in go/android-api-guidelines.
These rules are not always exact. For example, you should avoid using acronyms
in names; e.g. a method should be named handleUri, not handleURI. But what about
getZOrder? This is probably better than getZorder, but metalava can’t tell
without consulting a dictionary.
Therefore, there are cases where you want to say “ok, that’s good advice in
general, but wrong here”. In order to avoid having this warningshow up again
and again, there are two ways to mark an issue such that it is no longer
flagged.
(Note that metalava will not report issues on classes, methods and fields that
are deprecated since these are presumably already known to be bad and are already
discouraged.)
Suppressing with @Suppress
Next to an error message, metalava will include the issue id. For example,
here’s a sample error message:
src/android/pkg/MyStringImpl.java:3: error: Don't expose your implementation details: MyStringImpl ends with Impl [EndsWithImpl]
Here the id is “EndsWithImpl”. You can suppress this with the @SuppressLint
annotation:
...
import android.annotation.SuppressLint;
...@SuppressLint("EndsWithImpl")
public class MyStringImpl {...
Suppressing with baselines
Metalava also has support for “baselines”, which are files which record all the
current warnings and errors in the codebase. When metalava runs, it looks up the
baseline to see if a given issue is already listed in the baseline, and if so,
it is silently ignored.
You can pass a flag to metalava ("–update-baseline") to tell it to update the
baseline files with any new errors it comes across instead of reporting
them. With soong, if you specify the baseline explicitly, like this:
--- a/Android.bp
+++ b/Android.bp
@@ -1678,6 +1678,7 @@ droidstubs {},api_lint: {enabled: true,==> baseline_filename: "api/baseline.txt", <==}jdiff_enabled: true,}
then the build system will automatically supply --update-baseline on your
behalf to a generated file in the out/ folder, and if there’s a failure metalava
will tell you where to find the updated baseline which you can then copy into
place:
...
93 new API lint issues were found. See tools/metalava/API-LINT.md for how to handle these.
************************************************************
Your API changes are triggering API Lint warnings or errors.
To make these errors go away, you have two choices:1. You can suppress the errors with @SuppressLint("<id>")
2. You can update the baseline by executing the followingcommand:cp \out/soong/.intermediates/frameworks/base/system-api-stubs-docs/android_common/api/system-baseline.txt \frameworks/base/api/system-baseline.txtTo submit the revised baseline.txt to the main Androidrepository, you will need approval.
************************************************************
Then re-run the build and you should now see diffs to the baseline file; git
diff to make sure you’re really only marking the issues you intended to include.
$ git status
...
Untracked files:(use "git add <file>..." to include in what will be committed)baseline.txt
Copying File Manually
In the near future the build system will not allow source files to be modified
by the build. At that point you’ll need to manually copy in the file instead.
During the build, before failing, metalava will emit a message like this:
...
metalava wrote updated baseline to out/something/baseline.txt
...
At that point you can copy the file to where you need:
$ cp out/something/baseline.txt frameworks/base/api/baseline.txt
Existing Issues
You can view the exact set of existing issues (current APIs that get flagged by
API lint) by inspecting the baseline files in the source tree, but to get a
sense of the types of issues that are more likely to have a false positive,
here’s the existing distribution as of early 2019:
Count Issue Id Rule Severity
--------------------------------------------------932 ProtectedMember M7 error321 OnNameExpected warning288 ArrayReturn warning269 ActionValue C4 error266 NoByteOrShort FW12 warning221 ExecutorRegistration L1 warning211 AllUpper C2 error206 GetterSetterNames M6 error185 BannedThrow error172 SamShouldBeLast warning159 NoClone error159 ParcelNotFinal FW8 error119 NotCloseable warning105 ListenerLast M3 warning81 ConcreteCollection CL2 error78 StaticUtils error76 IntentName C3 error74 VisiblySynchronized M5 error72 GenericException S1 error65 KotlinOperator warning57 AcronymName S1 warning55 ParcelCreator FW3 error54 ParcelConstructor FW3 error53 UseIcu warning48 Enum F5 error41 RethrowRemoteException FW9 error37 AutoBoxing M11 error35 StreamFiles M10 warning28 IntentBuilderName FW1 warning27 ServiceName C4 error26 ListenerInterface L1 error25 ContextFirst M3 error25 InterfaceConstant C4 error24 CallbackInterface CL3 error24 RegistrationName L3 error23 IllegalStateException S1 warning22 EqualsAndHashCode M8 error22 PackageLayering FW6 warning18 MinMaxConstant C8 warning18 SingletonConstructor error17 MethodNameUnits error15 MissingBuildMethod warning15 UserHandleName warning14 UserHandle warning13 ResourceFieldName error12 ManagerLookup error11 ManagerConstructor error9 CallbackMethodName L1 error9 ParcelableList warning8 CallbackName L1 warning7 HeavyBitSet error7 ResourceValueFieldName C7 error6 CompileTimeConstant error6 SetterReturnsThis M4 warning4 EndsWithImpl error4 TopLevelBuilder warning4 UseParcelFileDescriptor FW11 error3 MentionsGoogle error3 StartWithLower S1 error2 AbstractInner warning2 BuilderSetStyle warning2 OverlappingConstants C1 warning2 PairedRegistration L2 error2 SingularCallback L1 error2 StartWithUpper S1 error1 ContextNameSuffix C4 error1 KotlinKeyword error
--------------------------------------------------4902
(This is generated when metalava is invoked with both --verbose and --update-baseline.)
尝试使用@SuppressLint("")方案解决，发现报错
libcore中暂不能使用android.annotation包，用grep搜了一个libcore整个目录，确实没有地方使用。
尝试使用第二种方法(update the baseline)，发现依然报错
cp "/data00/home/liuzhuangzhuang.das/work/aosp_sunfish/aosp$/out/soong/.intermediates/frameworks/base/api-stubs-docs/android_common/api_lint_baseline.txt" "/data00/home/liuzhuangzhuang.das/work/aosp_sunfish/aosp$/frameworks/base/api/lint-baseline.txt
然后看到报错的命令行，发现有个地方很有意思
--api-lint-ignore-prefix android.icu. --api-lint-ignore-prefix java. --api-lint-ignore-prefix junit. --api-lint-ignore-prefix org. --api-lint prebuilts/sdk/30/public/api/android-non-updatable.txt
–api-lint-ignore-prefix这玩意可以忽略lint检查
在frameworks/base/Android.bp中将libcore/util加进去，使lint检查忽略
metalava_framework_docs_args = "--manifest $(location core/res/AndroidManifest.xml) " +"--ignore-classes-on-classpath " +"--hide-package com.android.server " +"--error UnhiddenSystemApi " +"--hide RequiresPermission " +"--hide CallbackInterface " +"--hide MissingPermission --hide BroadcastBehavior " +"--hide HiddenSuperclass --hide DeprecationMismatch --hide UnavailableSymbol " +"--hide SdkConstant --hide HiddenTypeParameter --hide Todo --hide Typo " +"--force-convert-to-warning-nullability-annotations +*:-android.*:+android.icu.*:-dalvik.* " +"--api-lint-ignore-prefix android.icu. " +"--api-lint-ignore-prefix java. " +"--api-lint-ignore-prefix junit. " +"--api-lint-ignore-prefix org. " +"--api-lint-ignore-prefix libcore.util. "
然后又报错了(apilist flag问题)
安卓P之后谷歌定义了api的级别，blacklist, greylist, whitelist等。
我又将EventCallback声明为hide，继续编译
/*** @hide*/
public class EventCallback {.........
}
又报错了
Llibcore/util/BasicLruCache;-><init>(I)V,greylist
Llibcore/util/BasicLruCache;->create(Ljava/lang/Object;)Ljava/lang/Object;,blacklist
Llibcore/util/BasicLruCache;->entryEvicted(Ljava/lang/Object;Ljava/lang/Object;)V,blacklist
Llibcore/util/BasicLruCache;->evictAll()V,greylist
Llibcore/util/BasicLruCache;->get(Ljava/lang/Object;)Ljava/lang/Object;,greylist
Llibcore/util/BasicLruCache;->map:Ljava/util/LinkedHashMap;,greylist
Llibcore/util/BasicLruCache;->maxSize:I,greylist-max-o
Llibcore/util/BasicLruCache;->put(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;,greylist
Llibcore/util/BasicLruCache;->snapshot()Ljava/util/Map;,blacklist
Llibcore/util/BasicLruCache;->trimToSize(I)V,greylist-max-o
如果我的aosp是aosp-android10，则不会有该项报错。安卓11才会报错。
原因竟然是安卓11剥离出了一个framwork-wifi模块，该模块找不到EventCallback
解决方法：
framework-wifi模块如何使用的公共api呢？比如android.util.ArrayMap。根据这个思路，最后我又新加了一个android.util.EventCallback.java作为跳板，该跳板调用libcore.util.EventCallback。
再次编译成功的编译了代码。
该方法只是简单的绕过方案。有更好方案的，可留言评论，感谢您的宝贵建议。
package libcore.util;import android.compat.annotation.UnsupportedAppUsage;/*** @hide*/
@libcore.api.CorePlatformApi
public class EventCallback {private static volatile Callback sImpl = null;private EventCallback() {}/*** Used to replace default Reporter for logging events. Must be non-null.*/@UnsupportedAppUsage@libcore.api.CorePlatformApipublic static void setCallback(@NonNull Callback callback) {if (callback == null) {throw new NullPointerException("callback == null");}EventCallback.sImpl = callback;}@libcore.api.CorePlatformApipublic static interface Callback {@UnsupportedAppUsage@libcore.api.CorePlatformApipublic void onEvent(int code, @NonNull String method, @Nullable Object...objs);}@UnsupportedAppUsage@libcore.api.CorePlatformApipublic static void onEvent(int code, @NonNull String method, @Nullable Object... objs) {if (sImpl != null) {sImpl.onEvent(code, method, objs);}}
}
ROM-libcore中新加java文件编译报错相关推荐
- 使用cmd打开java文件，报错：“错误，编码GBK的不可映射字符”
使用cmd打开java文件,报错:"错误,编码GBK的不可映射字符" 今天使用EditPlus写了一个小程序,用cmd运行时报错--"错误,编码GBK的不可映射字符&qu ...
- SQL 新加字段查询窗口报错
SQL 新加字段查询窗口报错 这是由于SQL Server的intellisense的引起的,intellisense是SQL Server的智能记录智能感知功能,即当给sql表名加上".& ...
- eclipse中对单独JS文件取消报错的处理
eclipse中对单独JS文件取消报错的处理 eclipse中js文件报错的情况,或许大家早已习以为常了,那么有什么好的方法可以将其忽略掉呢?如果你也在寻找此问题,那么本文或许可以帮助到你 - 忽略某 ...
- .java文件突然报错，且无法新建项目
这是新建工程的时候弹出来的提示框,打开Details会发现罪魁祸首是这个 An error occurred while automatically activating bundle com.and ...
- eclipse运行JAVA文件输出报错
如上图所示,编写完JAVA文件之后,运行输出之后输出乱码,求解
- java文件操作报错：java.io.FileNotFoundException：D..（拒绝访问）
import java.io.*;/*** @Description: 复制文件,从一个输入流中读取数据,然后通过输出流写入目标位置,一边读一边写* @ClassName: CopyFile* @Ve ...
- linux java项目 编译报错_Linux下执行Java程序报错
在linux下编译java程序,执行javac编译生成class文件时,在centos7终端输入如,javac hello.java 会提示未找到指令,但用java -verison测试环境变量 ...
- （完美解决）java文件操作报错：java.io.FileNotFoundException（拒绝访问）
01-错误信息: Exception in thread "main" java.io.FileNotFoundException: e:b (拒绝访问.)at java.io.F ...
- 【错误记录】Kotlin 编译报错 ( Type mismatch: inferred type is String? but String was expected )
文章目录 一.报错信息 二.解决方案 一.报错信息 Google Play 上架要求 Android 的编译版本 和 目标版本都要高于 30 才可以上传 ; 将 Android 的编译版本 和 目标版 ...
最新文章
- 《Adobe Fireworks CS5中文版经典教程》——导读
- 鸿蒙os芯片,没有了芯片，华为能靠鸿蒙OS系统打出差异化吗？
- spring @Scheduled 注解实现的定时任务 3步走
- 泡腾片的打开方式：刀割封条，拔下盖子
- FEA-Net论文梳理
- Python任务调度模块APScheduler
- 电子设备的节能分析与设计
- 高等代数100道题及答案解析
- 简述CC2530晶振、振荡器与时钟
- 白痴qwerta的胡言乱语（一句话日度感想？
- Android利用SpannableStringBuilder设置TextView中部分文字的颜色...
- C语言编程＞第二十六周 ⑥ 请补充fun函数，该函数的功能是：按 “0”到 “9”统计一个字符串中的奇数数字字符各自出现的次数，结果保存在数组num中。注意：不能使用字符串库函数。
- jquery视频播放器_jQuery插入QuickTime视频播放器
- 微信公众号：开发者工具下载、安装、使用
- 【转】七个受用一生的心理寓言
- Incorrect string value: ‘\xE9\xBB\x84\xE8\x93\x89‘ for column ‘name‘ at row 1 MySQL 5.7解决方案
- [python] say hi
- win7（已安装）win10双系统安装教程
- 从惠普“质量门”到洋品牌的习惯性傲慢
- 深入理解生产则消费者模型