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How to import import android.tw.john.TWUtil; in android to communicate with Allwinner mcu

i tried TWUtil jar but not able to find libTWUtil.so file

I am able to import import android.tw.john.TWUtil; but getting error

E/AndroidRuntime(30513): java.lang.UnsatisfiedLinkError: No implementation found for void android.tw.john.TWUtil.native_init(int) (tried Java_android_tw_john_TWUtil_native_1init and Java_android_tw_john_TWUtil_native_1init__I)

Sumit
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