Smooth scrolling of images

[sermyagin]

How can I implement smooth movement (scrolling with preview) .

`import com.davemorrissey.labs.subscaleview.ImageSource;
import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView;

import java.io.File;
import java.io.IOException;
import java.util.List;

public class ImageViewerActivity extends AppCompatActivity {
private ImageView previewImageView;
private SubsamplingScaleImageView imageView;
private String mediaPath;
private List mediaPaths2;
private Uri mediaUri;
private LinearLayout photoButtonBar;
private SharedPreferences sharedPreferences;
private static final int DELETE_REQUEST_CODE = 1001;
private static final int REQUEST_CODE_OPEN_DOCUMENT = 1;

private static final int RENAME_REQUEST_CODE = 1002;
private Uri selectedUri;
private ImageView backButton;
private static final String DIALOG_STATE_KEY = "dialog_state_key";
private boolean isDialogShowing = false;
private GestureDetector gestureDetector;
private int currentIndex;

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

    if (savedInstanceState != null) {
        isDialogShowing = savedInstanceState.getBoolean(DIALOG_STATE_KEY, false);
    }

    sharedPreferences = getSharedPreferences(KEY.PREFS_NAME, MODE_PRIVATE);
    if (sharedPreferences.getBoolean(KEY.KEY_BRIGHTNESS, false)) {
        setBrightnessToMax();
    }

    photoButtonBar = findViewById(R.id.photo_button_bar);
    imageView = findViewById(R.id.image_view);
    backButton = findViewById(R.id.imageback);
    backButton.setOnClickListener(v -> finish());

    // Initialize GestureDetector and set onTouchListener for the imageView
    gestureDetector = new GestureDetector(this, new SwipeGestureDetector());
    imageView.setOnTouchListener((v, event) -> gestureDetector.onTouchEvent(event));

    // Retrieve the list of media paths from the Intent
    mediaPaths2 = getIntent().getStringArrayListExtra("MEDIA_PATHS");

    if (mediaPaths2 == null || mediaPaths2.isEmpty()) {
        Toast.makeText(this, "No media paths provided", Toast.LENGTH_SHORT).show();
        finish();
        return;
    }

    // Получаем текущий путь медиафайла
    mediaPath = getIntent().getStringExtra("MEDIA_PATH");
    if (mediaPath != null) {
        currentIndex = mediaPaths2.indexOf(mediaPath);

        if (currentIndex == -1) {
            Toast.makeText(this, "Media path not found in list", Toast.LENGTH_SHORT).show();
            finish();
            return;
        }
    } else {
        Toast.makeText(this, "Media path not provided", Toast.LENGTH_SHORT).show();
        finish();
        return;
    }

    // Продолжайте с загрузкой изображения
    mediaUri = getMediaUri(mediaPath);
    if (mediaUri != null) {
        displayImage(mediaUri);
    } else {
        Toast.makeText(this, "Image URI not found", Toast.LENGTH_SHORT).show();
        finish();
    }

    imageView.setOnClickListener(v -> togglePhotoButtonBarVisibility());

    if (isDialogShowing) {
        showPhotoInfo();
    }
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    return gestureDetector.onTouchEvent(event) || super.onTouchEvent(event);
}

private class SwipeGestureDetector extends GestureDetector.SimpleOnGestureListener {
    private static final int SWIPE_THRESHOLD = 100;
    private static final int SWIPE_VELOCITY_THRESHOLD = 100;

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        boolean result = false;
        try {
            float diffX = e2.getX() - e1.getX();
            if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                if (diffX > 0) {
                    onSwipeRight();
                } else {
                    onSwipeLeft();
                }
                result = true;
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
        return result;
    }
}


private void onSwipeRight() {
    if (currentIndex > 0) {
        currentIndex--;
        mediaUri = getMediaUri(mediaPaths2.get(currentIndex));
        displayImage(mediaUri);
    } else {
        Toast.makeText(this, "No previous media", Toast.LENGTH_SHORT).show();
    }
}

private void onSwipeLeft() {
    if (currentIndex < mediaPaths2.size() - 1) {
        currentIndex++;
        mediaUri = getMediaUri(mediaPaths2.get(currentIndex));
        displayImage(mediaUri);
    } else {
        Toast.makeText(this, "No next media", Toast.LENGTH_SHORT).show();
    }
}


private void displayImage(Uri uri) {
    imageView.setImage(ImageSource.uri(uri));
}`

`

<com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
    android:id="@+id/image_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />



<include
    android:id="@+id/photo_button_bar"
    layout="@layout/photo_view_button_bar"
    android:visibility="gone" />

`