Feature layer rendering mode (map)

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Render features statically or dynamically by setting the feature layer rendering mode.

Image of feature layer rendering mode map

Use case

In dynamic rendering mode, features and graphics are stored on the GPU. As a result, dynamic rendering mode is good for moving objects and for maintaining graphical fidelity during extent changes, since individual graphic changes can be efficiently applied directly to the GPU state. This gives the map or scene a seamless look and feel when interacting with it. The number of features and graphics has a direct impact on GPU resources, so large numbers of features or graphics can affect the responsiveness of maps or scenes to user interaction. Ultimately, the number and complexity of features and graphics that can be rendered in dynamic rendering mode is dependent on the power and memory of the device's GPU.

In static rendering mode, features and graphics are rendered only when needed (for example, after an extent change) and offloads a significant portion of the graphical processing onto the CPU. As a result, less work is required by the GPU to draw the graphics, and the GPU can spend its resources on keeping the UI interactive. Use this mode for stationary graphics, complex geometries, and very large numbers of features or graphics. The number of features and graphics has little impact on frame render time, meaning it scales well, and pushes a constant GPU payload. However, rendering updates is CPU and system memory intensive, which can have an impact on device battery life.

How to use the sample

Use the 'Animated Zoom' button to trigger the same zoom animation on both static and dynamic maps.

How it works

  1. Create an ArcGISMap and call getLoadSettings() and then setPreferred[Point/Polyline/Polygon]FeatureRenderingMode(...).
  2. The RenderingMode can be set to STATIC, DYNAMIC or AUTOMATIC.

    • In Static rendering mode, the number of features and graphics has little impact on frame render time, meaning it scales well, however points don't stay screen-aligned and point/polyline/polygon objects are only redrawn once map view navigation is complete.
    • In Dynamic rendering mode, large numbers of features or graphics can affect the responsiveness of maps or scenes to user interaction, however points remain screen-aligned and point/polyline/polygon objects are continually redrawn while the map view is navigating.
  3. When left to automatic rendering, points are drawn dynamically and polylines and polygons statically.

Relevant API

  • ArcGISMap
  • FeatureLayer
  • FeatureLayer.RenderingMode
  • LoadSettings
  • MapView

Tags

dynamic, feature layer, features, rendering, static

Sample Code

MainActivity.java
                                                                                                                                                                              
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/* Copyright 2017 Esri
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.esri.arcgisruntime.sample.featurelayerrenderingmodemap;

import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.concurrent.ListenableFuture;
import com.esri.arcgisruntime.data.ServiceFeatureTable;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.DefaultMapViewOnTouchListener;
import com.esri.arcgisruntime.mapping.view.MapView;

public class MainActivity extends AppCompatActivity {

  private MapView mMapViewTop;
  private MapView mMapViewBottom;
  private Viewpoint mZoomedIn;
  private Viewpoint mZoomedOut;
  private Button mZoomButton;
  private TextView mNavigatingTextView;

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

    Point centerPoint = new Point(-118.37, 34.45, SpatialReferences.getWgs84());

    // define viewpoints
    mZoomedOut = new Viewpoint(centerPoint, 650000, 0);
    mZoomedIn = new Viewpoint(centerPoint, 50000, 90);

    // inflate the zoom button
    mZoomButton = findViewById(R.id.zoomButton);

    // inflate MapViews from layout
    mMapViewTop = findViewById(R.id.mapViewTop);
    mMapViewBottom = findViewById(R.id.mapViewBottom);

    // inflate navigating text view
    mNavigatingTextView = findViewById(R.id.isNavigatingTextView);
    mNavigatingTextView.setVisibility(View.INVISIBLE);

    // create a map (top) and set it to render all features in static rendering mode
    ArcGISMap mapTop = new ArcGISMap();
    mapTop.getLoadSettings().setPreferredPointFeatureRenderingMode(FeatureLayer.RenderingMode.STATIC);
    mapTop.getLoadSettings().setPreferredPolylineFeatureRenderingMode(FeatureLayer.RenderingMode.STATIC);
    mapTop.getLoadSettings().setPreferredPolygonFeatureRenderingMode(FeatureLayer.RenderingMode.STATIC);

    // create a map (bottom) and set it to render all features in dynamic rendering mode
    ArcGISMap mapBottom = new ArcGISMap();
    mapBottom.getLoadSettings().setPreferredPointFeatureRenderingMode(FeatureLayer.RenderingMode.DYNAMIC);
    mapBottom.getLoadSettings().setPreferredPolylineFeatureRenderingMode(FeatureLayer.RenderingMode.DYNAMIC);
    mapBottom.getLoadSettings().setPreferredPolygonFeatureRenderingMode(FeatureLayer.RenderingMode.DYNAMIC);

    // create the service feature table
    ServiceFeatureTable faultServiceFeatureTable = new ServiceFeatureTable(
        getResources().getString(R.string.energy_geology_feature_service) + "0");
    ServiceFeatureTable contactsServiceFeatureTable = new ServiceFeatureTable(
        getResources().getString(R.string.energy_geology_feature_service) + "8");
    ServiceFeatureTable outcropServiceFeatureTable = new ServiceFeatureTable(
        getResources().getString(R.string.energy_geology_feature_service) + "9");

    // create the feature layer using the service feature table
    FeatureLayer faultFeatureLayer = new FeatureLayer(faultServiceFeatureTable);
    FeatureLayer contactsFeatureLayer = new FeatureLayer(contactsServiceFeatureTable);
    FeatureLayer outcropFeatureLayer = new FeatureLayer(outcropServiceFeatureTable);

    // add the feature layers to the map
    mapTop.getOperationalLayers().add(faultFeatureLayer);
    mapTop.getOperationalLayers().add(contactsFeatureLayer);
    mapTop.getOperationalLayers().add(outcropFeatureLayer);
    mapBottom.getOperationalLayers().add(faultFeatureLayer.copy());
    mapBottom.getOperationalLayers().add(contactsFeatureLayer.copy());
    mapBottom.getOperationalLayers().add(outcropFeatureLayer.copy());

    mMapViewTop.setMap(mapTop);
    mMapViewTop.setViewpoint(mZoomedOut);
    mMapViewBottom.setMap(mapBottom);
    mMapViewBottom.setViewpoint(mZoomedOut);

    mZoomButton.setOnClickListener(v -> animatedZoom());

    // disable the top map view on touch listener
    mMapViewTop.setOnTouchListener(new DefaultMapViewOnTouchListener(this, mMapViewTop) {
      @Override public boolean onTouch(View v, MotionEvent event) {
        return false;
      }
    });

    // disable the bottom map view on touch listener
    mMapViewBottom.setOnTouchListener(new DefaultMapViewOnTouchListener(this, mMapViewBottom) {
      @Override public boolean onTouch(View v, MotionEvent event) {
        return false;
      }
    });
  }

  /**
   * Controls animated zoom and updates the 'navigating' text view.
   */
  private void animatedZoom() {
    mZoomButton.setClickable(false);
    mNavigatingTextView.setVisibility(View.VISIBLE);
    zoomTo(mZoomedIn, 5).addDoneListener(() -> {
      mNavigatingTextView.setVisibility(View.INVISIBLE);
      zoomTo(mZoomedIn, 3).addDoneListener(() -> {
        mNavigatingTextView.setVisibility(View.VISIBLE);
        zoomTo(mZoomedOut, 5).addDoneListener(() -> {
          mZoomButton.setClickable(true);
          mNavigatingTextView.setVisibility(View.INVISIBLE);
        });
      });
    });
  }

  /**
   * Sets both MapViews to a Viewpoint over a number of seconds.
   *
   * @param viewpoint to which both MapViews should be set.
   * @param seconds over which the viewpoint is asynchronously set.
   *
   * @return a ListenableFuture representing the result of the Viewpoint change.
   */
  private ListenableFuture<Boolean> zoomTo(Viewpoint viewpoint, int seconds) {
    ListenableFuture<Boolean> setViewpointFuture = mMapViewTop.setViewpointAsync(viewpoint, seconds);
    mMapViewBottom.setViewpointAsync(viewpoint, seconds);
    return setViewpointFuture;
  }

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

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

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

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