英文:
Issue related to display of markers on Google Maps
问题
这是我的代码，用于在Google地图上显示标记，其颜色由自定义函数analyzeSampleDataToMarkerColor()决定，该函数在云中存储的数据中执行。标记一开始不会出现，但在随后的刷新后就可以正常工作。有什么原因吗？我应该在赋值之前分配变量marker吗？或者应该在UI线程中实现该函数？
for (int i = 0; i < stations.size(); i++) {
LatLng pos = new LatLng(stations.get(i).getLatitude(), stations.get(i).getLongitude());
MarkerOptions markerOptions = new MarkerOptions()
.position(pos)
.icon(BitmapDescriptorFactory.defaultMarker(analyzeSampleDataToMarkerColor(stations.get(i))));
Marker marker = mMap.addMarker(markerOptions); // 在此赋值之前是否需要分配内存给 marker 变量？
}
英文:
This is my code to display markers, of varying colors dictated by custom function analyzeSampleDataToMarkerColor() , on the google maps from a thread as the data resides in the cloud. The markers don't appear at first but works after subsequent refresh. Any reason? Should I allocate variable marker before the assignment? Or should the function be implemented in the UI thread ?
for (int i = 0; i < stations.size(); i++) {
LatLng pos = new LatLng(stations.get(i).getLatitude(), stations.get(i).getLongitude());
MarkerOptions markerOptions = new MarkerOptions()
.position(pos)
.icon(BitmapDescriptorFactory.defaultMarker(analyzeSampleDataToMarkerColor(stations.get(i))));
Marker marker = mMap.addMarker(markerOptions); // memory allotment of marker require before this assignment?
}
答案1
得分: 1
在循环中调用showInfoWindow()以显示标记，方法如下：
Marker marker = mMap.addMarker(markerOptions);
marker.showInfoWindow();
英文:
Call showInfoWindow() in your loop to display the markers like so:
Marker marker = mMap.addMarker(markerOptions);
marker.showInfoWindow();
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