ArcGIS for Android FeatureLayer的属性更新

参考api中所给的属性编辑的例子，写了一个非常简单的属性编辑的程序，单击地图中FeatureLayer的图斑，可以实现选中图斑，并在log中打印出该图斑的所有属性信息，之后点击修改按钮，可以将选中图斑中字段为field_name的值改为“哈哈”。（更新其他属性也可原理类似，可以参考api中提供的AttributeEditor的例子）

代码如下：

public class AttributeEditTestActivity extends Activity {

MapView mMapView ;
ArcGISFeatureLayer afl;
Map<String,Object> atts;
String obID;
ArcGISDynamicMapServiceLayer dmsl ;
boolean hasSelected=false;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mMapView = (MapView) findViewById(R.id.mapV);
Envelope initextent = new Envelope(-10868502.895856911, 4470034.144641369,
-10837928.084542884, 4492965.25312689);
mMapView.setExtent(initextent, 0);
ArcGISTiledMapServiceLayer tmsl = new ArcGISTiledMapServiceLayer(
"http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer");
mMapView.addLayer(tmsl);

dmsl = new ArcGISDynamicMapServiceLayer("http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Petroleum/KSFields/MapServer");
mMapView.addLayer(dmsl);
afl=new ArcGISFeatureLayer("http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Petroleum/KSFields/FeatureServer/0",
ArcGISFeatureLayer.MODE.SELECTION);
mMapView.addLayer(afl);
mMapView.setOnStatusChangedListener(new OnStatusChangedListener() {

public void onStatusChanged(Object arg0, STATUS arg1) {
if(arg0==mMapView && arg1==STATUS.INITIALIZED)
mMapView.setOnSingleTapListener(new mySingleTagLis());
//为ArcGISFeatureLayer设置被选中的颜色
SimpleFillSymbol selectSym=new SimpleFillSymbol( Color.BLUE);
selectSym.setAlpha(50);
selectSym.setOutline(new SimpleLineSymbol(Color.RED, 3));
afl.setSelectionSymbol(selectSym);
}
});
}

/**
* 单击地图的监听
*/
class mySingleTagLis implements OnSingleTapListener{
public void onSingleTap(float arg0, float arg1) {
Point p=mMapView.toMapPoint(arg0 ,arg1);
Query q=new Query();
//设置Query的各个参数
q.setInSpatialReference(mMapView.getSpatialReference());
q.setReturnGeometry(true);
q.setSpatialRelationship(SpatialRelationship.INTERSECTS);
q.setGeometry(p);
//执行选择
afl.selectFeatures(q, SELECTION_METHOD.NEW, new qCallBackLis());
}
}

/**
*
*执行选择ArcGISFeatureLayer的回调
*/
class qCallBackLis implements CallbackListener<FeatureSet>{

public void onCallback(FeatureSet fet) {
if(fet.getGraphics().length>0){
hasSelected=true;
Graphic g=fet.getGraphics()[0];//得到选择的Graphic
obID= g.getAttributeValue(afl.getObjectIdField()).toString();//保存ObjectID的值
atts= g.getAttributes();
//得到包含所有属性的Map集合，并进行遍历之后将属性和属性值打印在Log的上
Set<Entry<String ,Object>> ents= atts.entrySet();
for(Entry<String ,Object> ent:ents){
Log.i("Attribute ",ent.getKey()+"  :  "+ent.getValue());
}
}
}
public void onError(Throwable arg0) {
Log.i("AttributeEditTestActivity", "qCallBackLis 出错啦"+arg0.getMessage());
}
}

public void btn_click(View v){
if(!hasSelected){
return;
}
Toast.makeText(getApplicationContext(), "开始提交", 0).show();
atts.put("field_name", "哈哈");

//atts.put(afl.getObjectIdField(), obID);//这里可以不用给objectID赋值，因为atts中已经有该值了，
//但在其他情况下一定要记得给objectID赋值，这样server才知道更新那个Graphic的属性
Graphic g=new Graphic(null, null, atts, null);
afl.applyEdits(null, null, new Graphic[]{g}, new myEditLis());
}

//执行更新操作的回调
class myEditLis implements CallbackListener<FeatureEditResult[][]>{
public void onCallback(FeatureEditResult[][] fets) {
if(fets[2]!=null && fets[2][0]!=null && fets[2][0].isSuccess()){
Log.i("AttributeEditTestActivity", "edit 成功啦");
runOnUiThread( new Runnable() {//需要在主线程中才能根系UI
public void run() {
dmsl.refresh();
Toast.makeText(getApplicationContext(), "edit 成功啦", 0).show();
}
});
}

}

public void onError(final Throwable arg0) {
Log.i("AttributeEditTestActivity", "edit 出错啦"+arg0.getMessage());
runOnUiThread( new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "edit 出错啦"+arg0.getMessage(), 0).show();
}
});
}
}

@Override
protected void onDestroy() {
super.onDestroy();
}
@Override
protected void onPause() {
super.onPause();
mMapView.pause();
}
@Override 	protected void onResume() {
super.onResume();
mMapView.unpause();
}

打印出来的Log：



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