UnsatisfiedLinkError: Native method not found with .so file correctly put in Eclipse libs

问题

I'm new in using native methods for Android. I got the errors as below even after I have make sure my armeabi, armeabi-v7a, mips and x86 with correct *.so file are put correctly in the folders.

10-21 18:51:36.685: E/AndroidRuntime(24277): java.lang.UnsatisfiedLinkError: Native method not found: com.arzap.mimas.MimasJNI.MIMAS_LoadModel:(Ljava/lang/String;)V
10-21 18:51:36.685: E/AndroidRuntime(24277):    at com.arzap.mimas.MimasJNI.MIMAS_LoadModel(Native Method)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at com.arzap.mimas.ar.MainActivity.onCreate(MainActivity.java:36)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.app.Activity.performCreate(Activity.java:5451)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2377)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2471)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.app.ActivityThread.access$900(ActivityThread.java:175)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.os.Handler.dispatchMessage(Handler.java:102)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.os.Looper.loop(Looper.java:146)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at android.app.ActivityThread.main(ActivityThread.java:5602)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at java.lang.reflect.Method.invokeNative(Native Method)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at java.lang.reflect.Method.invoke(Method.java:515)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
10-21 18:51:36.685: E/AndroidRuntime(24277):    at dalvik.system.NativeStart.main(Native Method)

As below is how I loaded my .so file:

static{
    try {
        System.loadLibrary("libMimasAr3D");
    } catch (UnsatisfiedLinkError use) {
        Log.e("JNI", "WARNING: Could not load libMimasAr3D.so");
    }
}

Something extra (which I don't think that's the main issue)?

In the same file where I load my library, I have this method:

public static native void MIMAS_LoadModel(int ppModel);

Main Activity.java:

   //Description: Load the model.
   //Input: pModelPath - A file path to the saved model.
   //Return: A pointer to the object of the model. NULL if loading is failed.
    //Load image to MIMAS_SDK
    MimasJNI.MIMAS_LoadModel("models/model.bin");

Kindly please help me with that. Thanks in advance!

回答1:

loadLibrary() takes the name without "lib" prefix.
If you don't use RegisterNatives(), you should name the exported functions of your native library according to javah prescriptions, e.g. Java_com_arzap_mimas_MimasJNI_MIMAS_1LoadModel.
If the native code is C++, make sure the exported functions have extern "C" prefix to pervent name mangling.

来源：https://stackoverflow.com/questions/33257708/unsatisfiedlinkerror-native-method-not-found-with-so-file-correctly-put-in-ecl

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android

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