如何使浮动按钮消失在android中？

我有一个简单的浮动按钮，可以打开相机，然后在主活动中显示图像。

我想在用户检索图像结果后立即删除该浮动按钮，因此应该在onActivityResult之后scannedImageView.setImageBitmap(bitmap)

我尝试使用，btnFloat.setVisibility(View.GONE);但是由于它是一个浮动按钮，所以我不知道如何在我的方法上调用它。

主要活动

ImageView scannedImageView;

public void init() {
FloatingActionButton fab = findViewById(R.id.fab_capture);
}

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     super.onActivityResult(requestCode, resultCode, data);
     if (resultCode == Activity.RESULT_OK && data != null) {
         if (requestCode == OPEN_THING) {
             Uri uri = data.getExtras().getParcelable(ScanConstants.SCANNED_RESULT);
             Bitmap bitmap = null;
             try {
                 bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                 getContentResolver().delete(uri, null, null);
                 scannedImageView.setImageBitmap(bitmap);
               //btnFloat.setVisibility(View.GONE);
                 FileOutputStream outputStream = null;
                 File sdCard = new File(getExternalFilesDir(null).getAbsolutePath());
                 File directory = new File (sdCard.getAbsolutePath() +"/Scan Documents");
                 directory.mkdir();

                 String filename = String.format("d.jpg", System.currentTimeMillis());
                 File outFile = new File(directory, filename);

                 Toast.makeText(this, "Image Saved Successfully", Toast.LENGTH_SHORT).show();

                 Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                 intent.setData(Uri.fromFile(outFile));
                 sendBroadcast(intent);

                 try{
                     outputStream = new FileOutputStream(outFile);
                     bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
                     outputStream.flush();
                     outputStream.close();

                 }catch (FileNotFoundException e)
                 {
                     e.printStackTrace();
                 }
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }
     }
 }