java.lang.UnsatisfiedLinkError: No implementation found for Boolean

Question

I use ".so" files in my project but it give following error "java.lang.UnsatisfiedLinkError: No implementation found for Boolean", i already try to recreate ".so" using Cygwin and put it in jniLibs folder and also using create a jar of it, but it gives same error.

But the same ".so" file is working in my existing project. I try so many ways but its not working at all, what can i do ?

com.amaze.filemanager E/art: No implementation found for boolean com.amaze.filemanager.scanner.SignatureLib.InitScanner(java.lang.String, java.lang.String) (tried Java_com_amaze_filemanager_scanner_SignatureLib_InitScanner and Java_com_amaze_filemanager_scanner_SignatureLib_InitScanner__Ljava_lang_String_2Ljava_lang_String_2) 12-19 11:47:07.463 4579-4934/com.amaze.filemanager E/AndroidRuntime: FATAL EXCEPTION: Thread-5230 Process: com.amaze.filemanager, PID: 4579 java.lang.UnsatisfiedLinkError: No implementation found for boolean com.amaze.filemanager.scanner.SignatureLib.InitScanner(java.lang.String, java.lang.String) (tried Java_com_amaze_filemanager_scanner_SignatureLib_InitScanner and Java_com_amaze_filemanager_scanner_SignatureLib_InitScanner__Ljava_lang_String_2Ljava_lang_String_2) at com.amaze.filemanager.scanner.SignatureLib.InitScanner(Native Method) at com.amaze.filemanager.scanner.SignatureLib.InitializeScanner(SignatureLib.java:42) at com.amaze.filemanager.scanner.Signature.(Signature.java:62) at com.amaze.filemanager.ScanForVirusActivity$1.run(ScanForVirusActivity.java:66)

public class SignatureLib {

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

    SharedPreferencesUtils spu;
    Context context;

    public SignatureLib(Context context) {
        this.context = context;
    }

    private native boolean InitScanner(String strDBPath, String dbPathTemp);

    private native boolean DeInitScanner();

    private native String checkVirus(String filepath);

    private native boolean UploadFile(String FilePath, String DeviceID, String path);

    private native boolean DownloadFile(String FilePath, String DeviceID, String path);

    private native boolean IsGameApp(String AppName);

    private native boolean SetUpdateInProgressStatus(boolean bStatus);

    public boolean InitializeScanner(String strDBPath) {

        spu = new SharedPreferencesUtils();
        String packageName = context.getPackageName();
        String dbPathTemp = "data/data/" + packageName + "/";

        return InitScanner(strDBPath, dbPathTemp);
    }

}

Answer 1

Yeah, the full stack trace was needed- you broke it off initially in a place that made no sense. What its saying is that your .so file doesn't have an InitScanner function- either you misnamed it in the C file, you got the signature wrong, or it isn't there at all. Or if you used C++, you forgot to extern C the function.