error on android

[wakeee]

get error on android 8.1, it seems can not find the so file.

byte[] bytes_c = Zstd.compress(bytes);

Process: **, PID: 32609
                                                   java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/
***
G2A1lahdmnHjLbIRu2ZjeQ==/split_lib_slice_9_apk.apk!/lib/arm64-v8a, /system/lib64, /vendor/lib64, /product/lib64]]] couldn't find "libzstd-jni.so"
                                                   Unsupported OS/arch, cannot find /linux/aarch64/libzstd-jni.so or load zstd-jni from system libraries. Please try building from source the jar or providing libzstd-jni in you system.
                                                       at java.lang.Runtime.loadLibrary0(Runtime.java:1011)
                                                       at java.lang.System.loadLibrary(System.java:1660)
                                                       at com.github.luben.zstd.util.Native.load(Native.java:69)
                                                       at com.github.luben.zstd.Zstd.<clinit>(Zstd.java:11)
                                                       at com.github.luben.zstd.Zstd.compress(Zstd.java:348)
                                                       at com.huawei.hiai.vision.mobilextest.MainActivity.compress(MainActivity.java:53)
                                                       at com.huawei.hiai.vision.mobilextest.MainActivity.onCreate(MainActivity.java:39)
                                                       at android.app.Activity.performCreate(Activity.java:7354)
                                                       at android.app.Activity.performCreate(Activity.java:7345)
                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1219)
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3110)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3268)
                                                       at android.app.ActivityThread.-wrap12(Unknown Source:0)
04-25 21:46:53.432 32609-32609/? E/AndroidRuntime:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1888)
                                                       at android.os.Handler.dispatchMessage(Handler.java:109)
                                                       at android.os.Looper.loop(Looper.java:218)
                                                       at android.app.ActivityThread.main(ActivityThread.java:7384)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:469)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:963)

[luben]

Are you using it by importing zstd-jni in your project as a source sub-module or you are trying to reuse the Maven distributed JAR file? The later will not work.

[luben]

an aar is published on maven central for zstd-jni-1.3.4-10 and above, it should work now

[carlos-mg89]

I'm trying to use this library using the following gradle line:

implementation 'com.github.luben:zstd-jni:1.4.0-1'

But I'm still getting the Unsupported OS/arch, cannot find /linux/aarch64/libzstd-jni.so or load zstd-jni from system libraries. Please try building from source the jar or providing libzstd-jni in you system. error.

Perhaps something else has to be done in order for an Android project to work well?

[carlos-mg89]

My bad, I forgot to add the 'aar' suffix on the implementation line. The correct and working line for Gradle is:

implementation 'com.github.luben:zstd-jni:1.4.0-1'@aar

It's working!

[htteng1976]

@carlos-mg89 thank you for mentioning the @aar is quite important for fixing the issue. You save my day.

For Android developers who now use version catalog in module dependency management, the following code would be helpful to load the zstd library.

In libs.versions.toml,
[libraries]
zstd = { module = "com.github.luben:zstd-jni", version = "1.5.6-5"}

In build.gradle,
implementation (libs.zstd) {
artifact {
type = 'aar'
}
}