如何爲每個標記設置不同的圖標？

Question

如何爲每個標記設置不同的圖標，從服務器接收標記經度和緯度，並在地圖屏幕上繪製每個設備的緯度和緯度，並且每5秒鐘刪除以前的標記。

try { 
      //ArrayList list = new ArrayList<>(); 
      //TODO: remove previus markers 
      if (marker != null) { 
       mMap.clear(); 
       Toast.makeText(getApplicationContext(), "Remove", Toast.LENGTH_LONG).show(); 

      } 
      for (LatLng object : latLngList) 

      marker = mMap.addMarker(new MarkerOptions().title("User Name").position(object).icon(BitmapDescriptorFactory.fromResource(R.drawable.female4))); 

      System.out.println(marker.getId()+" Marker id......."); 
     } catch (Exception e) { 
      Toast.makeText(MainActivity.this, "Error ", Toast.LENGTH_LONG).show(); 
      // mMap.clear(); 
     } 

Answer 1

您需要有標記圖像和位置（緯度和經度）存儲在服務器上。在從服務器檢索數據時，您將同時獲得這兩個數據。下面是一個示例代碼：

if(googleMap != null){ 
     googleMap.clear(); // This will clear all of the previously added markers 
     ArrayList<ServerItems> listOfItems = new ArrayList<>(); // Where ServerItems is your custom Model 
     for(ServerItems item : listOfItems){ 
      LatLng position = item.getPosition(); // Assuming that Your Model ServerItems contains a method which returns LatLng 
      String markerURL = item.getMarkerURL(); // Assuming that Your Model ServerItems contains a method which returns MarkerURL stored on Server 
      ImageLoader.getInstance().loadImage(markerURL, new ImageLoadingListener() { 
       @Override 
       public void onLoadingStarted(String imageUri, View view) { 

       } 

       @Override 
       public void onLoadingFailed(String imageUri, View view, FailReason failReason) { 
        googleMap.addMarker(new MarkerOptions().position(position)); 
       } 

       @Override 
       public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) { 
        googleMap.addMarker(new MarkerOptions().position(position).icon(BitmapDescriptorFactory.fromBitmap(loadedImage))); 
       } 

       @Override 
       public void onLoadingCancelled(String imageUri, View view) { 
        googleMap.addMarker(new MarkerOptions().position(position)); 
       } 
      }); 

     } 

    } 

請注意，我以加載圖像從服務器位圖的形式使用UniversalImageLoader。