[Android] UnsatisfiedLinkError

症狀

E/AndroidRuntime: FATAL EXCEPTION: Thread-3056
Process: com.perfectcorp.beautycircle, PID: 14917
java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.perfectcorp.beautycircle-1/base.apk"],nativeLibraryDirectories=[/data/app/com.perfectcorp.beautycircle-1/lib/arm64, /data/app/com.perfectcorp.beautycircle-1/base.apk!/lib/arm64-v8a, /vendor/lib64, /system/lib64]]] couldn't find "libweibosdkcore.so"
at java.lang.Runtime.loadLibrary(Runtime.java:367)
at java.lang.System.loadLibrary(System.java:1076)
at com.sina.weibo.sdk.net.HttpManager.(SourceFile:83)
at com.sina.weibo.sdk.net.NetUtils.internalHttpRequest(SourceFile:46)
at com.sina.weibo.sdk.utils.AidTask.loadAidFromNet(SourceFile:344)
at com.sina.weibo.sdk.utils.AidTask.access$3(SourceFile:331)
at com.sina.weibo.sdk.utils.AidTask$2.run(SourceFile:203)
at java.lang.Thread.run(Thread.java:818)

線索

1. 這問題發生在 Nexus 9 的機器上，HTC Nexus 9 是一台 ARM64 的機器
2. java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.perfectcorp.beautycircle-1/base.apk"],nativeLibraryDirectories=[/data/app/com.perfectcorp.beautycircle-1/lib/arm64, /data/app/com.perfectcorp.beautycircle-1/base.apk!/lib/arm64-v8a, /vendor/lib64, /system/lib64]]] couldn't find "libweibosdkcore.so"

解法

• Root cause 在於 Nexus 9 是 ARM64 的機器，但 libweibosdkcore.so 卻只有 x86。
• 為了解決這問題，解法會是指定 .so 的目錄

1. 在 app gradle 的 defaultConfig 加上 ndk { abiFilters "armeabi-v7a" }
2. 在 project的根目錄下，找到 gradle.properties （不存在則新建）"android.useDeprecatedNdk=true 指定目錄"，不讓系统自動找.so檔

Reference

1. http://www.jianshu.com/p/cb05698a1968
2. https://corbt.com/posts/2015/09/18/mixing-32-and-64bit-dependencies-in-android.html