topic Re: Graphic Attribute Methods in ArcGIS Runtime SDK for Android Questions

Graphic Attribute Methods

LukeCatania — Mon, 07 May 2012 15:28:35 GMT

What happened to the setAttributeValue and removeAttribute methods on the Class Graphic? The only way I see to set attributes is to include them when instantiating the graphic. In my app, I draw a polygon in a graphics layer and then have a popup dialog box asking the user to enter info which will populate the attributes. So my graphic exist before having attributes. How do I populate the attributes after I already instantiated the graphic?

I tried updateGraphic. I used the constructor that allow you to assign an ID. I then created another graphic with attributes and used the updateGraphic method, but itdid not work. I found that my first graphic did did not contain the graphic ID I assigned, but some random one. How else can I do this?

Why was setAttributeValue and removeAttribute methods removed? Seems to make sense to be able to have such methods.

Re: Graphic Attribute Methods

LukeCatania — Mon, 07 May 2012 15:42:28 GMT

What happened to the setAttributeValue and removeAttribute methods on the Class Graphic? The only way I see to set attributes is to include them when instantiating the graphic. In my app, I draw a polygon in a graphics layer and then have a popup dialog box asking the user to enter info which will populate the attributes. So my graphic exist before having attributes. How do I populate the attributes after I already instantiated the graphic?

I tried updateGraphic. I used the constructor that allow you to assign an ID. I then created another graphic with attributes and used the updateGraphic method, but itdid not work. I found that my first graphic did did not contain the graphic ID I assigned, but some random one. How else can I do this?

Why was setAttributeValue and removeAttribute methods removed? Seems to make sense to be able to have such methods.

Actually the graphic ID is being assigned. The issue is when I query the graphics layer and use getGraphicIDs to get the ID of the queried graphic, that ID is not the one I assigned. I only have one graphic drawn and only one is returned from the query. Why is the number assigned not returned?

Re: Graphic Attribute Methods

DanO_Neill — Sat, 11 Dec 2021 18:10:35 GMT

You can populate the attributes of a graphic after it has been created using the GraphicsLayer.updateGraphic() method. Once a Graphic is added to a GraphicsLayer it is assigned a UID. This is currently by design so you cannot specify a UID on a new Graphic. The overloaded Graphic constructor that takes a UID parameter is an issue we are working on. As you have observed, when you assign a UID with that constructor it will not be honored with a returned Graphic from GraphicsLayer. We are looking to address this issue. If I understand your scenario correctly, you need to update a graphic with attributes based on user clicking on the graphic. You can use the screen coords x, y from the MapView listener to identify which Graphic you want to update. Below is an example:

mMapView.setOnLongPressListener(new OnLongPressListener() {

 private static final long serialVersionUID = 1L;

 @Override
 public void onLongPress(float x, float y) {
  int[] guids = gLayer.getGraphicIDs(x, y, 10);
    
  if(guids.length != 0){
   Graphic gr = gLayer.getGraphic(guids[0]);
   int uid = gr.getUid();
   Map<String,Object> attr = gr.getAttributes();
   attr.put("name", "Test");
   gLayer.updateGraphic(uid, attr);
   Log.d("Test", "Graphic attr update name = "+ gr.getAttributeValue("name"));     
  }
}