Android : Search Bytes In File In Android Java With FileChannel

hi my app creates bin file in android/data/package/files/here which analyses about app state and system state but i have made them unrecognized like not plain text only what i can recognized is hex bytes about it here is my code

    public boolean p(){
        String file = Environment.getExternalStorageDirectory().getPath() + "/Android/data/MY_APP_PACKAGE_NAME/files/sys.bin";

         FileChannel searchfile;

         byte[] Bytes = new byte[]{0x78 ,0x56 ,0x34}; // just for example

          try{   
              searchfile = new RandomAccessFile(file, "rw").getChannel();

              MappedByteBuffer fileBytes = searchfile.map(FileChannel.MapMode.READ_ONLY, 0L, (byte) searchfile.size());

              fileBytes.position(0);

              while (fileBytes.hasRemaining()) {

                 fileBytes.position();
                 int currentPos = fileBytes.position();
                  byte currentByte = fileBytes.get();   

                  if (currentByte==Bytes[0]) {

                     fileBytes.position(currentPos + 1);
                      byte currentByte1 = fileBytes.get();

                      if (currentByte1==Bytes[1]) {

                         fileBytes.position(currentPos + 2);
                          byte currentByte2 = fileBytes.get();

                          if (currentByte2==Bytes[2]) {

                              return true;
                          }

                      }

              }

           }

              searchfile.close();

              } catch (IOException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
              }
       return false;

     }

but i am unable to reach my code its not working even i tried adding bin file myself and even then it doesn't search the hex bytes, i tried putting everywhere in the file , can anybody can fix this where i am wrong and can provide fixed code