我正在开发自定义地图应用程序,我可以在其中从 Web 服务获取数据并根据该数据显示叠加项目。这是我运行我的应用程序时的问题,它会正确显示地图和叠加层,但是当我尝试缩放它或尝试点击它时,它变得很慢,性能非常慢。所以这里提出了一些性能问题。事实上,它不包含大量数据,只有 50 个叠加层。
我怀疑添加项目覆盖有问题,请检查并帮助我。
代码:
private void showWhaleDophinSightingsToMap() {
mapOverlays = mapView.getOverlays();
progressDialog.dismiss();
// Show overlay for whale sightings
Log.i(TAG, "whaleWatchingInfoList >>>>>> " + whaleWatchingInfoList);
Log.i(TAG, "whaleWatchingInfoList >>>>>> "+ whaleWatchingInfoList.size());
if(whaleWatchingInfoList != null && whaleWatchingInfoList.size() > 0) {
drawable = getResources().getDrawable(R.drawable.north);
customItemizedOverlay = new CustomItemizedOverlay<CustomOverlayItem>(drawable, mapView);
for(int i = 0; i < whaleWatchingInfoList.size(); i++) {
if(i == 0) {
MapController mc = mapView.getController();
mc.setZoom(7);
// Zoom Level
mapView.getController().setCenter(new GeoPoint((int)(whaleWatchingInfoList.get(i).getLatitude() * 1E6),
(int)(whaleWatchingInfoList.get(i).getLongtitude() * 1E6)));
}else {
geoPoint = new GeoPoint((int)(whaleWatchingInfoList.get(i).getLatitude() * 1E6),
(int)(whaleWatchingInfoList.get(i).getLongtitude() * 1E6));
CustomOverlayItem customOverlayItem = new CustomOverlayItem(geoPoint, whaleWatchingInfoList.get(i).getName(), whaleWatchingInfoList.get(i).getDescription(), whaleWatchingInfoList.get(i).getImageUrl(), whaleWatchingInfoList.get(i).getAtdwProductUrl());
customItemizedOverlay.addOverlay(customOverlayItem);
mapOverlays.add(customItemizedOverlay);
}
}
}
mapView.postInvalidate();
}