ArcGIS Runtime SDK for Android

Show Callout

Screenshot of Show Callout App

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Code

/* Copyright 2016 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.samples.showcallout;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.TextView;

import com.esri.arcgisruntime.geometry.GeometryEngine;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.view.Callout;
import com.esri.arcgisruntime.mapping.view.DefaultMapViewOnTouchListener;
import com.esri.arcgisruntime.mapping.view.MapView;

public class MainActivity extends AppCompatActivity {

  private static final String sTag = "Gesture";
  private MapView mMapView;
  private Callout mCallout;

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

    // inflate MapView from layout
    mMapView = (MapView) findViewById(R.id.mapView);
    // create a map with the Basemap Type topographic
    final ArcGISMap mMap = new ArcGISMap(Basemap.Type.TOPOGRAPHIC, 34.056295, -117.195800, 10);
    // set the map to be displayed in this view
    mMapView.setMap(mMap);

    mMapView.setOnTouchListener(new DefaultMapViewOnTouchListener(this, mMapView) {

      @Override
      public boolean onSingleTapConfirmed(MotionEvent motionEvent) {
        Log.d(sTag, "onSingleTapConfirmed: " + motionEvent.toString());

        // get the point that was clicked and convert it to a point in map coordinates
        android.graphics.Point screenPoint = new android.graphics.Point(Math.round(motionEvent.getX()),
            Math.round(motionEvent.getY()));
        // create a map point from screen point
        Point mapPoint = mMapView.screenToLocation(screenPoint);
        // convert to WGS84 for lat/lon format
        Point wgs84Point = (Point) GeometryEngine.project(mapPoint, SpatialReferences.getWgs84());
        // create a textview for the callout
        TextView calloutContent = new TextView(getApplicationContext());
        calloutContent.setTextColor(Color.BLACK);
        calloutContent.setSingleLine();
        // format coordinates to 4 decimal places
        calloutContent.setText("Lat: " + String.format("%.4f", wgs84Point.getY()) + ", Lon: " + String.format("%.4f", wgs84Point.getX()));

        // get callout, set content and show
        mCallout = mMapView.getCallout();
        mCallout.setLocation(mapPoint);
        mCallout.setContent(calloutContent);
        mCallout.show();

        // center on tapped point
        mMapView.setViewpointCenterAsync(mapPoint);

        return true;
      }
    });
  }

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

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

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


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