/private DocumentReference UsersRef;
/UsersRef = FirebaseFirestore.getInstance().collection("Users").document(currentUserID);

UsersRef.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot)
            {
                if(dataSnapshot.exists())
                {
                    if (dataSnapshot.hasChild("profileimage"))
                    {
                        String image = dataSnapshot.child("profileimage").getValue().toString();
                        Picasso.with(SetupActivity.this).load(image).placeholder(R.drawable.profile).into(ProfileImage);
                    }
                    else
                    {
                        Toast.makeText(SetupActivity.this, "Please select profile image first.", Toast.LENGTH_SHORT).show();
                    }
                }
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });
    }



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

        if(requestCode==Gallery_Pick && resultCode==RESULT_OK && data!=null)
        {
            Uri ImageUri = data.getData();

            CropImage.activity()
                    .setGuidelines(CropImageView.Guidelines.ON)
                    .setAspectRatio(1, 1)
                    .start(this);
        }

        if(requestCode==CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE)
        {
            CropImage.ActivityResult result = CropImage.getActivityResult(data);

            if(resultCode == RESULT_OK)
            {
                loadingBar.setTitle("Profile Image");
                loadingBar.setMessage("Please wait, while we updating your profile image...");
                loadingBar.show();
                loadingBar.setCanceledOnTouchOutside(true);

                Uri resultUri = result.getUri();

                StorageReference filePath = UserProfileImageRef.child(currentUserID + ".jpg");

                filePath.putFile(resultUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>() {
                    @Override
                    public void onComplete(@NonNull final Task<UploadTask.TaskSnapshot> task)
                    {
                        if(task.isSuccessful())
                        {
                            Toast.makeText(SetupActivity.this, "Profile Image stored successfully to Firebase storage...", Toast.LENGTH_SHORT).show();

                            final String downloadUrl = task.getResult().getDownloadUrl().toString();

                            UsersRef.child("profileimage").setValue(downloadUrl)
                                    .addOnCompleteListener(new OnCompleteListener<Void>() {
                                        @Override
                                        public void onComplete(@NonNull Task<Void> task)
                                        {
                                            if(task.isSuccessful())
                                            {
                                                Intent selfIntent = new Intent(SetupActivity.this, SetupActivity.class);
                                                startActivity(selfIntent);

                                                Toast.makeText(SetupActivity.this, "Profile Image stored to Firebase Database Successfully...", Toast.LENGTH_SHORT).show();
                                                loadingBar.dismiss();
                                            }
                                            else
                                            {
                                                String message = task.getException().getMessage();
                                                Toast.makeText(SetupActivity.this, "Error Occured: " + message, Toast.LENGTH_SHORT).show();
                                                loadingBar.dismiss();
                                            }
                                        }
                                    });
                        }
                    }
                });
            }
            else
            {
                Toast.makeText(this, "Error Occured: Image can not be cropped. Try Again.", Toast.LENGTH_SHORT).show();
                loadingBar.dismiss();
            }
        }
    }