There is an error . taskSnapshot.getdownloadurl().toString he cant fine the getdownloadurl

Question

There is an error . taskSnapshot.getdownloadurl().toString he cant fine the getdownloadurl

public class UploadActivty extends AppCompatActivity {

    private static final int PICK_FILE_REQUEST = 1;

    private Button mButtonChooseFile;
    private Button mButtonUpload;
    private TextView mTextViewShowUploads;
    private EditText mEditTextFileName;
    private TextView mTextViewFileName;
    private ProgressBar mProgressBar;

    private Uri mFileUri;

    private StorageReference mStorageRef;
    private DatabaseReference mDataBaseRef;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_upload_activty);

        mButtonChooseFile = findViewById(R.id.button_choose_file);
        mButtonUpload = findViewById(R.id.button_upload);
        mTextViewShowUploads = findViewById(R.id.text_view_show_uploads);
        mEditTextFileName = findViewById(R.id.edit_text_file);
        mTextViewFileName = findViewById(R.id.file_name);
        mProgressBar = findViewById(R.id.progress_bar);

        mStorageRef = FirebaseStorage.getInstance().getReference("uploads");
        mDataBaseRef = FirebaseDatabase.getInstance().getReference("uploads");


        mButtonChooseFile.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                OpenFileChooser();
            }
        });

        mButtonUpload.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                uploadFile();
            }
        });

        mTextViewShowUploads.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });



    }


    private void OpenFileChooser(){
        Intent intent = new Intent();
        intent.setType("audio/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(intent, PICK_FILE_REQUEST);
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode == PICK_FILE_REQUEST && resultCode == RESULT_OK
            && data != null && data.getData() != null){
            mFileUri = data.getData();
                    Uri returnUri = data.getData();
            Cursor returnCursor = getContentResolver().query(returnUri, null, null, null, null);
            int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
            returnCursor.moveToFirst();

            mTextViewFileName.setText(returnCursor.getString(nameIndex));
        }
    }

    private String getFileExtension(Uri uri){
        ContentResolver cR = getContentResolver();
        MimeTypeMap mime = MimeTypeMap.getSingleton();
        return mime.getExtensionFromMimeType(cR.getType(uri));
    }

    private void uploadFile(){
        if(mFileUri != null){
            StorageReference fileReference = mStorageRef.child(System.currentTimeMillis()+ "." + getFileExtension(mFileUri));

            fileReference.putFile(mFileUri)
                    .addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
                        @Override
                        public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                            Handler handler = new Handler();
                            handler.postDelayed(new Runnable() {
                                @Override
                                public void run() {
                                    mProgressBar.setProgress(0);
                                }
                            }, 500);

                            Toast.makeText(UploadActivty.this, "Upload Succesfull", Toast.LENGTH_LONG).show();
                            Upload upload = new Upload(mEditTextFileName.getText().toString().trim(),
                                    taskSnapshot.getDownloadUrl().toString());
                            String uploadId = mDataBaseRef.push().getKey();
                            mDataBaseRef.child(uploadId).setValue(upload);
                        }
                    })
                    .addOnFailureListener(new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            Toast.makeText(UploadActivty.this, e.getMessage(), Toast.LENGTH_SHORT).show();
                        }
                    }).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                        @Override
                        public void onProgress(@NonNull UploadTask.TaskSnapshot taskSnapshot) {
                            double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
                            mProgressBar.setProgress((int) progress);
                        }
            });
        }else{
            Toast.makeText(this, "No File Selected", Toast.LENGTH_SHORT).show();
        }
    }

}