我正在尝试将我在解析中的图像添加到谷歌地图信息窗口，我可以从资源添加图像，但我无法将现有的解析图像加载到我的信息窗口内的图像视图中。我已经在我的应用程序的其他区域加载了解析图像，但似乎信息窗口超出了范围。有没有办法在我的infowindow中加载这个解析图像？我不想使用资源文件，因为图像在解析时是不同的。我的代码的两部分如下：
class NearbyEventTask extends AsyncTask<String, Void, ArrayList<Item>>
{
Random r;
Context context;
public NearbyEventTask(Context context){
r = new Random();
this.context = context;
}
public LatLng getRandomLocation(Location center, double radius) {
// Convert radius from meters to degrees
double radiusInDegrees = radius / 111000;
double u = r.nextDouble();
double v = r.nextDouble();
double w = radiusInDegrees * Math.sqrt(u);
double t = 2 * Math.PI * v;
double lat = w * Math.cos(t);
double lon = w * Math.sin(t);
double new_lat = lat / Math.cos(center.getLongitude());
return new LatLng(new_lat + center.getLatitude(), lon + center.getLongitude());
}
@Override
protected ArrayList<Item> doInBackground(String... params) {
ArrayList<Item> list = new ArrayList<Item>();
ParseQuery<ParseObject> query = ParseQuery.getQuery("Places");
if(searchType!=null && searchType.length()>0) {
ArrayList<String> types = new ArrayList<String>();
for(String type: searchType.split("\\|")) types.add(type);
query.whereContainedIn("category", types);
}
if(lastKnownLocation!=null) {
query.whereNear("location", new ParseGeoPoint(lastKnownLocation.getLatitude(), lastKnownLocation.getLongitude()));
}
try {
List<ParseObject> objects = query.find();
for(ParseObject obj : objects){
ParseGeoPoint point = obj.getParseGeoPoint("location");
Item item = new Item(obj.getString("name"), obj.getString("category"), obj.getString("description"), point.getLatitude(), point.getLongitude());
item.vicinity = obj.getString("description") + " | "+obj.getDate("event_date");
list.add(item);
if(obj.getParseFile("icon")!=null) {
item.setIcon(obj.getParseFile("icon").getUrl());
item.downloadIcon(context);
}
}
} catch (ParseException e) {
}
return list;
}
@Override
protected void onPostExecute(final ArrayList<Item> arrayList) {
if(isCancelled()) return;
if(googleMap!=null) {
googleMap.clear();
mMarker2Item.clear();
LatLngBounds.Builder boundBuilder = new LatLngBounds.Builder();
for (Item item : arrayList) {
MarkerOptions opts = new MarkerOptions()
.position(item.location())
.title(item.name);
if(item.iconBitmap!=null){
opts = opts.icon(BitmapDescriptorFactory.fromBitmap(item.iconBitmap));
}
Marker newMarker = googleMap.addMarker(opts);
newMarker.setSnippet(item.vicinity);
mMarker2Item.put(newMarker, item);
boundBuilder.include(item.location());
}
try {
if (firstTime) {
firstTime = false;
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngBounds(boundBuilder.build(), 200);
googleMap.moveCamera(cameraUpdate);
googleMap.animateCamera(cameraUpdate, 1000, null);
}
} catch (Exception ex) {
}
} else mHandler.postDelayed(new Runnable() {
@Override
public void run() {
onPostExecute(arrayList);
}
}, 500);
}
}
@Override
public void onMapReady(final GoogleMap googleMap) {
googleMap.setMyLocationEnabled(true);
this.googleMap = googleMap;
googleMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {
// Use default InfoWindow frame
@Override
public View getInfoWindow(Marker arg0) {
return null;
}
// Defines the contents of the InfoWindow
@Override
public View getInfoContents(Marker marker) {
View v = getActivity().getLayoutInflater().inflate(R.layout.maps_infowindow, null);
v.setLayoutParams(new LinearLayout.LayoutParams((int) (mapFragment.getView().getMeasuredWidth() * .9), LinearLayout.LayoutParams.WRAP_CONTENT));
((TextView) v.findViewById(R.id.title)).setText(marker.getTitle());
((TextView) v.findViewById(R.id.desc)).setText(marker.getSnippet());
ImageView icon = (ImageView) v.findViewById(R.id.imageView5);
icon.getLayoutParams().height = 800; // OR
icon.getLayoutParams().width = 800;
ArrayList<Item> list = new ArrayList<Item>();
ParseQuery<ParseObject> query = ParseQuery.getQuery("Places");
if(searchType!=null && searchType.length()>0) {
ArrayList<String> types = new ArrayList<String>();
for(String type: searchType.split("\\|")) types.add(type);
query.whereContainedIn("icon", types);
}
try {
List<ParseObject> objects = query.find();
for(ParseObject obj : objects){
if(obj.getParseFile("icon")!=null) {
Picasso.with(getActivity()).load(obj.getParseFile("icon").getUrl()).into(icon, new MarkerCallback(marker));
}
}
} catch (ParseException e) {
}
return v;
}
}
);
代码更新：如果您查看顶部的NearbyEventTast类，您可以看到如何实现代码以从解析中获取数据。我试图通过创建一个新的NearbyEventTast来做同样的事情，但我无法加载正确的图像。它总是显示相同的图像（我认为它是解析中的第一个）并显示所有对象而不是相应的图像。任何idiea什么事都在发生？谢谢！
答案 0 :(得分：1)
因为我不太了解Parse。但我也面临这个问题，将URL中的图像显示在信息窗口中。
首先，infowindow没有显示下载的图像，因为MapFragment将视图渲染为Canvas然后绘制它。您在信息窗口中看到的不是您创建的视图，而是它们的“图片”或“屏幕截图”。你基本上需要在Marker对象上再次调用showInfoWindow（），这将重新渲染Canvas，你的图像现在将可见。
或者您可以使用Picasso库来加载图片。我在我的应用程序中使用Picasso回调选项。
首先，您需要创建一个实现Picasso Callback接口的Class，并在构造函数中接收一个标记，以在图像加载时调用show info窗口。
public static class MarkerCallback implements Callback {
private Marker marker;
public MarkerCallback(Marker marker) {
this.marker = marker;
}
@Override
public void onSuccess() {
if (marker != null && marker.isInfoWindowShown()) {
marker.hideInfoWindow();
marker.showInfoWindow();
}
}
@Override
public void onError() {
}
}
如何使用它。
public View getInfoContents(Marker marker) {
View v = getActivity().getLayoutInflater().inflate(R.layout.maps_infowindow, null);
v.setLayoutParams(new LinearLayout.LayoutParams((int) (mapFragment.getView().getMeasuredWidth() * .9), LinearLayout.LayoutParams.WRAP_CONTENT));
((TextView) v.findViewById(R.id.title)).setText(marker.getTitle());
((TextView) v.findViewById(R.id.desc)).setText(marker.getSnippet());
ImageView markerIcon = (ImageView) v.findViewById(R.id.imageView5);
Picasso.with(MainActivity.this).load(imgUrl).into(markerIcon, new MarkerCallback(marker));
}
希望这会对您有所帮助。