Native libraries not found in ApplicationInfo.nativeLibraryDir when building app bundle for arm64 Android phone

Question

I am trying to migrate my app from a monolithic APK to the app bundle format. I need to set LD_LIBRARY_PATH environment variable for an exec() call, therefore I need the location of my native libraries. With the original APK I would call getApplicationInfo().nativeLibDir and the libraries were there.

With the app bundle they are not. I can see the correct abi split APK installed, but for some reason the libraries are not extracted.

I have tried installing with bundletool and through Google Play,

Tried to run 'ls -alR' and I can clearly see the directory exists as well as the split apk, but the libraries are simply not extracted. I guess I could extract them manually as a workaround but that would seem unnecessary..?

Here is the output of ls on the parent folder of nativeLibPath

genLibraryPath: Dir Contents: /data/app/com.unseenonline-raAFLhJMQpjqWkVdG1Vocg==:
        total 16704
        drwxr-xr-x   4 system system      4096 2019-06-11 12:41 .
        drwxrwx--x 114 system system     12288 2019-06-11 12:41 ..
        -rw-r--r--   1 system system   5688352 2019-06-11 12:41 base.apk
        drwxr-xr-x   3 system system      4096 2019-06-11 12:41 lib
        drwxrwx--x   3 system install     4096 2019-06-11 12:41 oat
        -rw-r--r--   1 system system  11226112 2019-06-11 12:41 split_config.arm64_v8a.apk
        -rw-r--r--   1 system system     35636 2019-06-11 12:41 split_config.en.apk
        -rw-r--r--   1 system system     90443 2019-06-11 12:41 split_config.xxhdpi.apk

        /data/app/com.unseenonline-raAFLhJMQpjqWkVdG1Vocg==/lib:
        total 24
        drwxr-xr-x 3 system system 4096 2019-06-11 12:41 .
        drwxr-xr-x 4 system system 4096 2019-06-11 12:41 ..
        drwxr-xr-x 2 system system 4096 2019-06-11 12:41 arm64

        /data/app/com.unseenonline-raAFLhJMQpjqWkVdG1Vocg==/lib/arm64:
        total 16
        drwxr-xr-x 2 system system 4096 2019-06-11 12:41 .
        drwxr-xr-x 3 system system 4096 2019-06-11 12:41 ..

As you can see the split apks are there but the libraries are not extracted.

Libraries should be extracted to the same location as they were with the original apk

Answer 1

默认情况下，从Android App Bundle生成的APK具有在Android P +的设备上未压缩的本地库。由于Android平台可以直接从APK读取本机库，而不必将它们提取到单独的位置，因此这不仅通常会减少下载大小，而且还大大减少了设备上应用程序的大小。在最后的I / O上，有一个关于如何减小应用程序大小以及如何影响安装数量的演讲，他们详细介绍了如何在您有兴趣更好地理解应用程序的情况下工作。

因此，既然您知道为什么Google Play会这样做了，那么您可以选择以下选项：

• 您可以选择还原为原始的APK行为，这可以通过android.bundle.enableUncompressedNativeLibs=false在gradle.properties文件中添加标志来完成。这将有效地禁用此优化，从而为M +上的所有用户提供更大的应用程序大小。

• 您可以确保本机库是由Android平台加载的（例如使用System.loadLibrary），或者如果您出于某种原因直接读取该库，也可以直接从APK读取该库。

如果本机库是由您依赖的第三方库加载的，请考虑为它们提交错误以解决此问题，以便它们遵循与平台相同的逻辑。

希望能有所帮助，