如何在osmdroid的mapview中将jpg文件叠加为位图文件

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Rect;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.Overlay;

public class ImageOverlay extends Overlay {
    private Bitmap bitmap;
    private Point topLeft;
    private Paint paint;

    public ImageOverlay(Bitmap bitmap, Point topLeft) {
        this.bitmap = bitmap;
        this.topLeft = topLeft;
        this.paint = new Paint();
    }

    @Override
    public void draw(Canvas canvas, MapView mapView, boolean shadow) {
        super.draw(canvas, mapView, shadow);

        if (!shadow) {
            Rect src = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
            Rect dst = new Rect(topLeft.x, topLeft.y, topLeft.x + bitmap.getWidth(), topLeft.y + bitmap.getHeight());
            canvas.drawBitmap(bitmap, src, dst, paint);
        }
    }
}

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Point;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.MapOverlay;

public class MainActivity extends AppCompatActivity {
    private MapView mapView;

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

        mapView = findViewById(R.id.map_view);
        mapView.setBuiltInZoomControls(true);

        // 加载jpg文件为位图
        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.your_image);

        // 设置位图叠加的位置
        Point topLeft = new Point(0, 0); // 以左上角为起点

        // 创建Overlay并添加到MapView中
        ImageOverlay imageOverlay = new ImageOverlay(bitmap, topLeft);
        mapView.getOverlays().add(imageOverlay);

        // 设置地图中心点和缩放级别
        GeoPoint center = new GeoPoint(39.9, 116.4); // 北京市的经纬度
        mapView.getController().setCenter(center);
        mapView.getController().setZoom(10);
    }
}