get the filename (image in phone storage /download folder)

Question

downloaded image shows uri shown below dat=content://com.android.providers.downloads.documents/document/22

while a get filename ==>22 is shown as filename w

Answer 1

You can get image like this:

 private void pickImage() {
      Intent pickPhotoIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
      pickPhotoIntent.setType("image/*");
      startActivityForResult(Intent.createChooser(pickPhotoIntent, "Select Picture"), PICK_IMAGE_ONLY);
 }

You can get like this in onActivityResult() method:

  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == PICK_IMAGE_ONLY && resultCode == RESULT_OK && null != data) {
            String[] filePathColumn = {MediaStore.Images.Media.DATA};
            Uri selectedMediaUri = data.getData();
            Cursor cursor = getContentResolver().query(selectedMediaUri, filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndexOrThrow(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            Log.e("Image Path", "Image " + " " + picturePath);
        }
    }

Edit

For DICOM Images, here i am using imbrea SDK https://github.com/binarno/Imebra-V5-Android-Simple-Dicom-Viewer

public void loadDicomFile() {
        Intent intent = new Intent()
                .setType("*/*")
                .setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select a DICOM file"), PICK_DICOM);
}

OnActivtyResult method for DICOM Images:

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            if (requestCode == PICK_DICOM && resultCode == RESULT_OK) {
            try {
                CodecFactory.setMaximumImageSize(8000, 8000);
                // Get the selected URI, then open an input stream
                if (data.getData()== null) {
                    return;
                }
                InputStream stream = getContentResolver().openInputStream(uri);

                // The usage of the Pipe allows to use also files on Google Drive or other providers
                PipeStream imebraPipe = new PipeStream(32000);

                // Launch a separate thread that read from the InputStream and pushes the data
                // to the Pipe.
                Thread pushThread = new Thread(new PushToImebraPipe(imebraPipe, stream));
                pushThread.start();

                // The CodecFactory will read from the Pipe which is feed by the thread launched
                // before. We could just pass a file name to it but this would limit what we
                // can read to only local files
                DataSet loadDataSet = CodecFactory.load(new StreamReader(imebraPipe.getStreamInput()));

                // Get the first frame from the dataset (after the proper modality transforms
                // have been applied).
                Image dicomImage = loadDataSet.getImageApplyModalityTransform(0);

                // Use a DrawBitmap to build a stream of bytes that can be handled by the
                // Android Bitmap class.
                TransformsChain chain = new TransformsChain();
                DrawBitmap drawBitmap = new DrawBitmap(chain);
                Memory memory = drawBitmap.getBitmap(dicomImage, drawBitmapType_t.drawBitmapRGBA, 4);

                // Build the Android Bitmap from the raw bytes returned by DrawBitmap.
                Bitmap renderBitmap = Bitmap.createBitmap((int) dicomImage.getWidth(), (int) dicomImage.getHeight(), Bitmap.Config.ARGB_8888);
                byte[] memoryByte = new byte[(int) memory.size()];
                memory.data(memoryByte);
                ByteBuffer byteBuffer = ByteBuffer.wrap(memoryByte);
                renderBitmap.copyPixelsFromBuffer(byteBuffer);

                // Update the image
                binding.ivMain.setImageBitmap(renderBitmap);
                binding.ivMain.setScaleType(ImageView.ScaleType.FIT_CENTER);

            } catch (IOException e) {
                android.app.AlertDialog.Builder dlgAlert = new AlertDialog.Builder(this);
                dlgAlert.setMessage(e.getMessage());
                dlgAlert.setTitle("Error");
                dlgAlert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        //dismiss the dialog
                    }
                });
                dlgAlert.setCancelable(true);
                dlgAlert.create().show();
                String test = "Test";
            }
    }
}

Answer 2

You can get file name using this method

public String getName(String filename) {
    if (filename == null) {
        return null;
    }
    int index = filename.lastIndexOf('/');
    return filename.substring(index + 1);
}

In this message pass your URI as an argument

getName(uri.toString());