Android 使用 Gradle 打印 .so 库地址

参考：【Android开发】如何快速知道某个so来源于哪个库

最近在做包体积优化，想要查找各个 .so 文件是来源于哪个第三方库的，方便排除。终于找到如下方法：

在 app 下 build.gradle 文件中追加以下代码：

// 打印出所有 .so 库的文件地址
tasks.whenTaskAdded { task ->
    // 注意：如果是有多个 flavor，则改成 merge“Flavor”DebugNativeLibs 的形式
    if (task.name=='mergeDebugNativeLibs') { 
        task.doFirst {
            println("------------------- find so files start -------------------")
            println("------------------- find so files start -------------------")
            println("------------------- find so files start -------------------")

            it.inputs.files.each { file ->
                printDir(new File(file.absolutePath))
            }

            println("------------------- find so files end -------------------")
            println("------------------- find so files end -------------------")
            println("------------------- find so files end -------------------")
        }
    }
}

def printDir(File file) {
    if (file != null) {
        if (file.isDirectory()) {
            file.listFiles().each {
                printDir(it)
            }
        } else if (file.absolutePath.endsWith(".so")) {
            println "find so file: $file.absolutePath"
        }
    }
}

注意：task.name 的判断条件那里，如果是有多个 flavor，则改成 merge『Flavor』DebugNativeLibs 的形式，比如我的 flavor 是 『Prod』，则改成 “mergeProdDebugNativeLibs”。

然后执行 gradle 命令：

./gradlew assemble

可以在编译日志中看到类似如下的输出：

Task :app:mergeDebugNativeLibs
------------------- find so files start -------------------
------------------- find so files start -------------------
------------------- find so files start -------------------
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\290908405aa37ee091b2a987a24aa9d0\jetified-animated-gif-2.0.0\jni\arm64-v8a\libgifimage.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\290908405aa37ee091b2a987a24aa9d0\jetified-animated-gif-2.0.0\jni\armeabi-v7a\libgifimage.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\290908405aa37ee091b2a987a24aa9d0\jetified-animated-gif-2.0.0\jni\x86\libgifimage.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\290908405aa37ee091b2a987a24aa9d0\jetified-animated-gif-2.0.0\jni\x86_64\libgifimage.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\b2adcba2625cf2da1029c207c31ac6ca\jetified-webpsupport-2.0.0\jni\arm64-v8a\libstatic-webp.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\b2adcba2625cf2da1029c207c31ac6ca\jetified-webpsupport-2.0.0\jni\armeabi-v7a\libstatic-webp.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\b2adcba2625cf2da1029c207c31ac6ca\jetified-webpsupport-2.0.0\jni\x86\libstatic-webp.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\b2adcba2625cf2da1029c207c31ac6ca\jetified-webpsupport-2.0.0\jni\x86_64\libstatic-webp.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\da48f63f1984c1712902b6f0ec8a5e47\jetified-klog-2.2.10-gradle-564\jni\arm64-v8a\libyylog.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\da48f63f1984c1712902b6f0ec8a5e47\jetified-klog-2.2.10-gradle-564\jni\armeabi-v7a\libyylog.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\aa7e29876f055d50ea8fd93c07422010\jetified-flowimagesdk-3.1.2\jni\arm64-v8a\libflowimagesdk.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\aa7e29876f055d50ea8fd93c07422010\jetified-flowimagesdk-3.1.2\jni\armeabi\libflowimagesdk.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\aa7e29876f055d50ea8fd93c07422010\jetified-flowimagesdk-3.1.2\jni\armeabi-v7a\libflowimagesdk.so
find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\aa7e29876f055d50ea8fd93c07422010\jetified-flowimagesdk-3.1.2\jni\x86\libflowimagesdk.so
...
------------------- find so files end -------------------
------------------- find so files end -------------------
------------------- find so files end -------------------

例如：libgifimage.so，它出现在以下目录：

find so file: D:\Gradle_Repo\caches\transforms-2\files-2.1\290908405aa37ee091b2a987a24aa9d0\jetified-animated-gif-2.0.0\jni\arm64-v8a\libgifimage.so

就说明它是由 jetified-animated-gif-2.0.0 引入的。