How to add a marker in my location in a map

Question

I want to add an image into my map marker, I don't know why this code is not working. The marker is not displaying in my current location.If I move the marker to the onMap ready and assign the location to the LatLng one or two, it will work but when i move it to the OnLocationChanged, it will not work. I want to use it in the onLocationChanged Here is the code.

    onMapready
    
     @Override
        public void onMapReady(GoogleMap googleMap) {
            mMap = googleMap;
    
            LatLng one = new LatLng(4.9757,8.3417);
            LatLng two = new LatLng(4.9857,8.4417);
            
            LatLngBounds.Builder builder = new LatLngBounds.Builder();
            builder.include(one);
            builder.include(two);
    
            LatLngBounds bounds = builder.build();
            
            int width = getResources().getDisplayMetrics().widthPixels;
            int height = getResources().getDisplayMetrics().heightPixels;
            int padding = (int) (width * 0.20);
            mMap.setLatLngBoundsForCameraTarget(bounds);
            mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds,width,height,padding));
            mMap.setMinZoomPreference(mMap.getCameraPosition().zoom);
            buildGoogleApiClient();
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                return;
            }
            mMap.setMyLocationEnabled(true);
        }
        
         @Override
            public void onLocationChanged(Location location) {
                BitmapDescriptor imageDrawable = BitmapDescriptorFactory.fromResource(R.drawable.driver);
                if (lastLocation !=null) {
                    lastLocation = location;
                    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
                    mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
                    mMap.addMarker(new MarkerOptions().position(latLng).title("My Location")
                    .icon(imageDrawable));
                    mMap.animateCamera(CameraUpdateFactory.zoomTo(10));
                }
        
        Thanks in advance