WMS Layer (URL)

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# WMS Layer (URL)
Display a WMS Layer from an online URL.

![WMS Layer URL App](wms-layer-url.png)

## How to use the sample
Simply run the app.

## How it works
A `WmsLayer` is constructed by setting the URL and layerNames parameters. The URL must be the URL to the "GetCapabilities" endpoint of the WMS Service. Alternatively, the layer could be constructed by setting the layerInfos parameter.

NOTE: The Web Map Service (WMS) in this sample is managed by the United States Geological Survey (USGS). ESRI, has no control over service uptime.

## Relevant API
* Map
* MapView
* WmsLayer

Code

/* 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.wmslayerurl;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import com.esri.arcgisruntime.layers.WmsLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.view.MapView;

public class MainActivity extends AppCompatActivity {

  private MapView mMapView;

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

    // inflate MapView from layout
    mMapView = findViewById(R.id.mapView);
    // create a map with the BasemapType topographic
    ArcGISMap map = new ArcGISMap(Basemap.Type.IMAGERY, 2.0, 18.0, 3);
    // set the map to be displayed in this view
    mMapView.setMap(map);

    // hold a list of uniquely-identifying WMS layer names to display
    List<String> wmsLayerNames = new ArrayList<>();
    wmsLayerNames.add("0");

    // create a new WMS layer displaying the specified layers from the service
    WmsLayer wmsLayer = new WmsLayer(getString(R.string.wms_layer_url), wmsLayerNames);

    // add the layer to the map
    map.getOperationalLayers().add(wmsLayer);
  }

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

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

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