Dismiss Snackbar On left swipe

another simple and cleaner approach could be the following:

val behavior = BaseTransientBottomBar.Behavior().apply {
    setSwipeDirection(SwipeDismissBehavior.SWIPE_DIRECTION_ANY)
}
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_INDEFINITE)
    .setBehavior(behavior)
    .show()

with this you don't need to check and cast the layout params nor to use the onShown callback.

hope this will help :

OnSwipeTouchListener.java:

import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

public class OnSwipeTouchListener implements OnTouchListener {

    private final GestureDetector gestureDetector;

    public OnSwipeTouchListener (Context ctx){
        gestureDetector = new GestureDetector(ctx, new GestureListener());
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return gestureDetector.onTouchEvent(event);
    }

    private final class GestureListener extends SimpleOnGestureListener {

        private static final int SWIPE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }

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

            } catch (Exception exception) {
                exception.printStackTrace();
            }
            return result;
        }
    }

    public void onSwipeRight() {
    }

    public void onSwipeLeft() {
    }

    public void onSwipeTop() {
    }

    public void onSwipeBottom() {
    }
}

how to use : On MainActivity

 public class MainActivity extends AppCompatActivity {
    CoordinatorLayout coordinatorLayout;

    private Snackbar snackbar;

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

        coordinatorLayout = (CoordinatorLayout)findViewById(R.id.coordinatorLayout); 

        snackbar = Snackbar
                .make(coordinatorLayout, "Replace with your own action", Snackbar.LENGTH_INDEFINITE)
                .setAction("RETRY", null);

        snackbar.setActionTextColor(Color.RED);

        View sbView = snackbar.getView();
        TextView textView = (TextView) sbView.findViewById(android.support.design.R.id.snackbar_text);
        textView.setTextColor(Color.YELLOW);
        snackbar.show();

        textView.setOnTouchListener(new OnSwipeTouchListener(MainActivity.this)
        {
            public void onSwipeTop() {

            }
            public void onSwipeRight() {

            }
            public void onSwipeLeft() {
                snackbar.dismiss();
            }
            public void onSwipeBottom() {

            }
        });

    }
}