ArcGIS for Android 100.3.0（6）：动态地图图层（ArcGISMapImageLayer和ArcGISMapImageSublayer）

动态地图图层ArcGISMapImageLayer是通过访问动态地图服务MapService获取的，里面包含的是一个子图层集合SublayerList，通过这个子图层集合可以构造得到每个动态地图图层ArcGISMapImageSublayer。

  mMapView = (MapView) findViewById(R.id.mapView);

  String url="http://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer";

        //创建处理动态生成的地图图像的MapImageLayer
        final ArcGISMapImageLayer mapImageLayer = new ArcGISMapImageLayer(url);

        //添加层加载完成时调用的侦听器。
        mapImageLayer.addDoneLoadingListener(new Runnable() {
            @Override
            public void run() {
                if (mapImageLayer.getLoadStatus() == LoadStatus.LOADED) {
                     //获取所有子图层的集合
                    mSublayersList = mMapImageLayer.getSublayers();
                    Log.e("xyh", "onCreate: " + mSublayersList.size());
                    ArcGISMapImageSublayer mainMapImageSublayer = (ArcGISMapImageSublayer) mSublayersList.get(0);
                    ArcGISMapServiceInfo mapServiceInfo = mapImageLayer.getMapServiceInfo();
                    // work with map service info here
                }
            }
        });
        ArcGISMap map = new ArcGISMap();
        //添加地图图像图层作为操作图层图。
        map.getOperationalLayers().add(mapImageLayer);
        mMapView.setMap(map);

效果图：

控制动态图层的子图层的显示

加载ArcGISMapImageLayer后，会默认把所有子图层显示出来，这时我们可以控制子图层是否显示。

public void setVisible (boolean isVisible)

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <!-- MapView -->
    <com.esri.arcgisruntime.mapping.view.MapView
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></com.esri.arcgisruntime.mapping.view.MapView>

    <ListView
        android:id="@+id/listview"
        android:layout_width="200dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="@android:color/background_light"
        android:choiceMode="singleChoice"
        android:divider="@color/colorDivider"
        android:dividerHeight="1dp"></ListView>



</android.support.v4.widget.DrawerLayout>

public class ChangeSublayerVisibilityActivity extends AppCompatActivity {

    private MapView mMapView;

    private ArcGISMapImageLayer mMapImageLayer;

    private String url = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer";

    private String url2 = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer/0";

    private DrawerLayout mDrawerLayout;

    private ListView mListView;

    private SublayerList mSublayersList;

    private ActionBarDrawerToggle mDrawerToggle;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_change_sublayer_visibility);

        findViews();

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setTitle("加载动态图层的子图层");

        //底图
        ArcGISMap map = new ArcGISMap(Basemap.Type.TOPOGRAPHIC, 48.354406, -99.998267, 2);

        //动态图层
        mMapImageLayer = new ArcGISMapImageLayer(url);
        mMapImageLayer.addDoneLoadingListener(new Runnable() {
            @Override
            public void run() {
                //获取所有子图层的集合
                mSublayersList = mMapImageLayer.getSublayers();
                Log.e("xyh", "onCreate: " + mSublayersList.size());
                ArcGISMapImageSublayer mainMapImageSublayer = (ArcGISMapImageSublayer) mSublayersList.get(0);
                ArcGISMapServiceInfo mapServiceInfo = mMapImageLayer.getMapServiceInfo();
            }
        });

        //设置动态图层的透明度
        mMapImageLayer.setOpacity(0.5f);
        //默认会把所以子图层都显示出来
        map.getOperationalLayers().add(mMapImageLayer);
        mMapView.setMap(map);

        //可以设置所有子图层都不显示
        //        for (int i = 0; i < mSublayersList.size(); i++) {
        //            mSublayersList.get(i).setVisible(false);
        //        }

        initDrawerLayout();

    }

    private void initDrawerLayout() {
        setupDrawer();

        List<String> dataList = new ArrayList<>();
        dataList.add("Cities");
        dataList.add("Continents");
        dataList.add("World");

        DrawerLayoutAdapter drawerLayoutAdapter = new DrawerLayoutAdapter(this, dataList, R.layout.item);
        mListView.setAdapter(drawerLayoutAdapter);

        drawerLayoutAdapter.setMyOnCheckedChangeListener(new DrawerLayoutAdapter.MyOnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(boolean isChecked, int position) {
                if (isChecked) { //显示
                    mSublayersList.get(position).setVisible(true);
                } else { //不显示
                    mSublayersList.get(position).setVisible(false);
                }
            }
        });
    }

    private void setupDrawer() {
        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.drawer_open, R.string.drawer_close) {

            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
                //getSupportActionBar().setTitle(mActivityTitle);
                invalidateOptionsMenu();
            }

            public void onDrawerClosed(View view) {
                super.onDrawerClosed(view);
                invalidateOptionsMenu();
            }
        };

        mDrawerToggle.setDrawerIndicatorEnabled(true);
        mDrawerLayout.addDrawerListener(mDrawerToggle);
    }

    private void findViews() {
        mMapView = (MapView) findViewById(R.id.mapView);
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mListView = (ListView) findViewById(R.id.listview);

        mDrawerLayout.setScrimColor(Color.TRANSPARENT);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        return (mDrawerToggle.onOptionsItemSelected(item)) || super.onOptionsItemSelected(item);
    }


    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

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

    @Override
    protected void onResume() {
        super.onResume();
        mMapView.resume();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMapView.dispose();
    }
}