I get java.lang.UnsatisfiedLinkError when try to call a native function from my project configured with bazel

Asked Apr 17 '20 at 11:18

Active Apr 19 '20 at 17:56

Viewed 220 times

I have created a cc_library in my bazel Build file and added the deps in android_binary rule

Bazel BUILD:

cc_library(
    name = "native_libs",
    srcs = glob([
        "app/src/main/jni/**/*.cc",
        "app/src/main/jni/**/*.h",
    ]),

)
   android_binary(
   name = "buildlib",
   srcs = glob([
        "app/src/main/java/**/*.java",
    ]),
   manifest = "app/src/main/AndroidManifest.xml",
   deps = ":native_libs",
)

And loaded the library in the specified package as

static{
System.loadLibrary("buildlib");}

And declares and calls the native function as :

Declaration:

private static native String foo(String code);

Function Call

foo("Code");

JNI FILE FUNCTION DECLARATION AND DEFINITION:

    JNIEXPORT jstring JNICALL
    Java_com_example_android_(foo)( JNIEnv* env, jobject thiz, jstring code );

JNIEXPORT jstring JNICALL
Java_com_example_android_(foo)( JNIEnv* env, jobject thiz, jstring code )
{
   //some code
    return code;
}

The library gets loaded successfully but while function call throws an error of java.lang.UnsatisfiedLinkError

How can i called the native foo() from my java file?

edited Apr 19 '20 at 17:56

asked Apr 17 '20 at 11:18

snsnasst networks

What does `nm native_libs.so | grep foo` produce? – Botje Apr 17 '20 at 12:02
1

Also, your question contains typos like "Jave" and "laodLibrary". I hope these are not present in your actual code? – Botje Apr 17 '20 at 12:43
Since your native code is C++, have you wrapped your JNI declarations/definitions in `extern "C" {}`? Also, you haven't shown us enough of your Java code for us to verify that your JNI function is named correctly. – Michael Apr 17 '20 at 13:43
yes.I have wrapped it under extern "C". – snsnasst networks Apr 19 '20 at 17:57
And the typos are not present in my actual code. – snsnasst networks Apr 19 '20 at 17:58
Please add the output of `nm` as I asked in the first comment, as well as the full Java package and class name. – Botje Apr 20 '20 at 07:00

I get java.lang.UnsatisfiedLinkError when try to call a native function from my project configured with bazel

0 Answers0