无法解析API文件“frameworks/base/api/current.txt”。

Question

我尝试在Android框架中添加一些文件。一切都进行得很顺利，除了编译结束时出现以下错误。

我也尝试了更新API，但没有成功，每次编译时都会出现以下错误。如果有人知道如何克服这个问题，请告诉我。

Docs droiddoc: out/target/common/docs/doc-comment-check
Checking API: checkapi-last
Checking API: checkapi-current
host layoutlib_create: out/host/common/obj/JAVA_LIBRARIES/temp_layoutlib_intermediates/javalib.jar
Couldn't parse API file "frameworks/base/api/current.txt"
  ...as text: com.google.doclava.apicheck.ApiParseException: missing class or interface. got: private line 6342
  ...as XML:  com.google.doclava.apicheck.ApiParseException: Error parsing API
Couldn't parse API file "out/target/common/obj/PACKAGING/public_api.txt"
  ...as text: com.google.doclava.apicheck.ApiParseException: missing class or interface. got: private line 6342
  ...as XML:  com.google.doclava.apicheck.ApiParseException: Error parsing API
Exception in thread "main" java.lang.NullPointerException
    at com.google.doclava.apicheck.ApiCheck.checkApi(ApiCheck.java:118)
    at com.google.doclava.apicheck.ApiCheck.main(ApiCheck.java:67)

******************************
You have tried to change the API from what has been previously approved.

To make these errors go away, you have two choices:
   1) You can add "@hide" javadoc comments to the methods, etc. listed in the
      errors above.

   2) You can update current.txt by executing the following command:
         make update-api

      To submit the revised current.txt to the main Android repository,
      you will need approval.
******************************



Couldn't parse API file "out/target/common/obj/PACKAGING/public_api.txt"
  ...as text: com.google.doclava.apicheck.ApiParseException: missing class or interface. got: private line 6342
  ...as XML:  com.google.doclava.apicheck.ApiParseException: Error parsing API
Exception in thread "main" java.lang.NullPointerException
    at com.google.doclava.apicheck.ApiInfo.isConsistent(ApiInfo.java:60)
    at com.google.doclava.apicheck.ApiCheck.checkApi(ApiCheck.java:118)
    at com.google.doclava.apicheck.ApiCheck.main(ApiCheck.java:67)

******************************
You have tried to change the API from what has been previously released in
an SDK.  Please fix the errors listed above.
******************************


make: *** [out/target/common/obj/PACKAGING/checkapi-last-timestamp] Error 38
make: *** Waiting for unfinished jobs....
make: *** [out/target/common/obj/PACKAGING/checkapi-current-timestamp] Error 38
-rw-r--r-- 1 aankit admin 9763299 Jan 31 14:21 out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes.jar
Output: out/host/common/obj/JAVA_LIBRARIES/temp_layoutlib_intermediates/javalib.jar
Input :      out/target/common/obj/JAVA_LIBRARIES/core_intermediates/classes.jar
Input :      out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes.jar
Found 7983 classes in input JARs.
Found 2260 classes to keep, 2143 class dependencies.
# deps classes: 2143
# keep classes: 2260
# renamed     : 19
Created JAR file out/host/common/obj/JAVA_LIBRARIES/temp_layoutlib_intermediates/javalib.jar

- AAnkit

Answer 1

这个问题的原因是，

原因：我在Android Frameworks中添加了私有类，这些类的文档/声明必须添加到“frameworks/base/api/current.txt”中。

解决方案：根据错误日志，有两种解决方法。

1）在每个新添加的文件及其成员的方法签名中添加@hide注释。

2）使用命令$ make update-api然后 $ make -j4，或者使用$make update-api && make -j4，现在代码应该可以编译了。

- AAnkit

Answer 2

在更新API之前，您是否尝试编译代码？似乎您添加的代码无法编译。 问题在于新的API无法解析。 如果您检查external/doclava/src/com/google/doclava/apicheck/ApiFile.java，您会发现可以帮助您的throw语句：

throw new ApiParseException("missing class or interface. got: " + token, tokenizer.getLine());

看起来您尝试向API添加私有类或接口，这是不允许的。要检查此问题，请查看out/target/common/obj/PACKAGING/public_api.txt文件的第6342行。在那里，您应该找到导致错误的类或接口的名称。

- Yury