title: java.lang.UnsatisfiedLinkError: No implementation found for Boolean
body: <p>I use ".so" files in my project but it give following error "<strong>java.lang.UnsatisfiedLinkError: No implementation found for Boolean</strong>", i already try to recreate ".so" using Cygwin and put it in <strong>jniLibs</strong> folder and also using create a <strong>jar</strong> of it, but it gives same error.</p>
  
  <p>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 ?</p>
  
  <blockquote>
    <p>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)</p>
  </blockquote>
  
  <pre><code>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);
      }
  
  }
  </code></pre>