小编Gau*_*mar的帖子

我试图在android中的单击方法上绘制一个标记.当我绘制标记时它将绘制但是它将需要更多时间来绘制,即30-40毫秒,有时需要2-3秒.这是我的类的代码,其中我有draw方法.

public class MyItemizedOverlay extends ItemizedOverlay<OverlayItem> {

    private ArrayList<OverlayItem> overlayItemList = new ArrayList<OverlayItem>();

    public MyItemizedOverlay(Drawable pDefaultMarker,
            ResourceProxy pResourceProxy) {
        super(pDefaultMarker, pResourceProxy);
    }

    @Override
    public void draw(Canvas canvas, MapView mapView, boolean arg2) {
        super.draw(canvas, mapView, arg2);

        // ---translate the GeoPoint to screen pixels---
        Point screenPts = new Point();
        mapView.getProjection().toPixels(p, screenPts);

        // ---add the marker---
        Bitmap bmp = BitmapFactory.decodeResource(getResources(),
                R.drawable.pin_annotation_darkblue);
        Bitmap bmp1 = BitmapFactory.decodeResource(getResources(),
                R.drawable.pin_annotation_green);
        Bitmap bmp2 = BitmapFactory.decodeResource(getResources(),
                R.drawable.pin_annotation_bue);
        Bitmap bmp3 = BitmapFactory.decodeResource(getResources(),
                R.drawable.pin_annotation_light);
        Bitmap bmp4 = BitmapFactory.decodeResource(getResources(),
                R.drawable.pin_annotation_light);
        Bitmap bmp5 …

在我的应用程序中,我使用osm地图.我有经纬度.使用这种方法

proj = mapView.getProjection();
        loc = (GeoPoint) proj.fromPixels((int) e.getX(), (int) e.getY());
        String longitude = Double
                .toString(((double) loc.getLongitudeE6()) / 1000000);
        String latitude = Double
                .toString(((double) loc.getLatitudeE6()) / 1000000);
        Toast toast = Toast.makeText(getApplicationContext(), "Longitude: "
                + longitude + " Latitude: " + latitude, Toast.LENGTH_SHORT);
        toast.show();

所以从这里我将如何查询从osm数据库获取城市名称.请帮我.如何将其转换为人类可理解的形式.这是我正在使用的代码.链接