android源码环境下编译fourthling.cling库的依赖问题

怼烎@ 2023-08-17 16:03 116阅读 0赞

记录下，编译fourthline.cling静态库的依赖问题。

1，因为需要在android的源码环境下调试依赖cling的投屏，需要将fourthline.cling编译为静态库。

首先预制依赖的.jar文件，具体是LOCAL\_STATIC\_JAVA\_LIBRARIES，include $(BUILD\_STATIC\_JAVA\_LIBRARY)相关.mk文件的编写。

2，然后，javax包的依赖，android环境下貌似不能直接使用javax包下的文件，需另外导入相关库：

[https://www.mvnjar.com/javax.enterprise/cdi-api/2.0/detail.html][https_www.mvnjar.com_javax.enterprise_cdi-api_2.0_detail.html]

也就是cdi-api-2.0的jar包，它包含的类文件：

javax.decorator.Decorator.

javax.enterprise.....

3，在把fourthline.cling编译成静态库时，引用前面的静态库：

LOCAL\_STATIC\_JAVA\_LIBRARIES += cdi-api

LOCAL\_SDK\_VERSION := current

include $(BUILD\_STATIC\_JAVA\_LIBRARY)

需要提醒的是其中的LOCAL\_SDK\_VERSION := current编译项会导致

external/flCling/fourthlineCling/Android.mk: error: fourthling.cling (java:sdk) should not link to cdi-api (java:platform)

编译错误。因为使用android中非public的接口，所以需要修改.mk文件，LOCAL\_SDK\_VERSION := current行替换为LOCAL\_PRIVATE\_PLATFORM\_APIS := true

4，过滤掉引用类导致的编译错误：

如编译log中出现：

Warning: javax.enterprise.inject.spi.BeanManager: can't find referenced class javax.el.ExpressionFactory

Warning: org.eclipse.jetty.servlet.jmx.ServletMappingMBean: can't find referenced field 'java.lang.Object \_managed' in program class org.eclipse.jetty.servlet.jmx.ServletMappingMBean

......

Error: Please correct the above warnings first.

\[ 18% 3/16\] //frameworks/base:framework javac10 \[common\]

ninja: build stopped: subcommand failed.

12:42:21 ninja failed with: exit status 1

参考文档：

[https://www.guardsquare.com/en/products/proguard/manual/troubleshooting\#unresolvedclass][https_www.guardsquare.com_en_products_proguard_manual_troubleshooting_unresolvedclass]

**Warning: can't find superclass or interface**  
**Warning: can't find referenced class**

**Warning: can't find referenced field/method '...' in program class ...**

api我就不翻译了，大意是引用的jar包中又引用了别的类，导致了这样的警告，尽管不是error，也导致了编译不过。

如果这些缺失的class，不影响程序的正常运行，没有这些依赖也没啥坏处，就可以过滤掉这些警告。

如果缺失这些class，导致程序crash，还是要去找到对应的jar包，导入进来。

这里的处理，是去过滤掉这些warning:

做法，首先根目录编写：proguard.flags文件

然后，在android.mk中应用这个文件proguard.flags。

LOCAL\_PROGUARD\_FLAG\_FILES := proguard.flags

另外proguard.flags文件的内容：

\# Disable the warnings of using dynamic method call in common library.  
\-dontnote org.fourthline.cling.\*

...

\#Avoid the library class dependency error  
\-dontwarn org.eclipse.jetty.jmx.\*

\-dontwarn javax.el.\*

...

[https_www.mvnjar.com_javax.enterprise_cdi-api_2.0_detail.html]: https://www.mvnjar.com/javax.enterprise/cdi-api/2.0/detail.html
[https_www.guardsquare.com_en_products_proguard_manual_troubleshooting_unresolvedclass]: https://www.guardsquare.com/en/products/proguard/manual/troubleshooting#unresolvedclass