Open existing map

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/* 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.sample.openexistingmap;

import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.drawerlayout.widget.DrawerLayout;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.portal.Portal;
import com.esri.arcgisruntime.portal.PortalItem;

public class MainActivity extends AppCompatActivity {

  private MapView mMapView;
  private ArcGISMap mMap;
  private Portal mPortal;
  private PortalItem mPortalItem;

  private ListView mDrawerList;

  private ActionBarDrawerToggle mDrawerToggle;
  private DrawerLayout mDrawerLayout;
  private String mActivityTitle;

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

    mDrawerList = findViewById(R.id.navList);
    mDrawerLayout = findViewById(R.id.drawer_layout);
    mActivityTitle = getTitle().toString();

    // inflate MapView from layout
    mMapView = findViewById(R.id.mapView);

    // get the portal url for ArcGIS Online
    mPortal = new Portal(getResources().getString(R.string.portal_url));
    // get the pre-defined portal id and portal url
    mPortalItem = new PortalItem(mPortal, "92ad152b9da94dee89b9e387dfe21acd");
    // create a map from a PortalItem
    mMap = new ArcGISMap(mPortalItem);
    // set the map to be displayed in this view
    mMapView.setMap(mMap);

    // add the webmap titles to the drawer
    addDrawerItems();
    setupDrawer();

    // set icons on action bar
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);
  }

  private void addDrawerItems() {
    String[] webmapTitles = { getString(R.string.webmap_geology_us),
        getString(R.string.webmap_terrestrial_ecosystems),
        getString(R.string.webmap_hurricanes_cyclones_typhoons) };
    ArrayAdapter<String> mAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, webmapTitles);
    mDrawerList.setAdapter(mAdapter);

    mDrawerList.setOnItemClickListener((adapterView, view, position, id) -> {
      if (position == 0) {
        mPortalItem = new PortalItem(mPortal, "92ad152b9da94dee89b9e387dfe21acd");
        // create a map from a PortalItem
        mMap = new ArcGISMap(mPortalItem);
        // set the map to be displayed in this view
        mMapView.setMap(mMap);
        // close the drawer
        mDrawerLayout.closeDrawer(adapterView);
      } else if (position == 1) {
        mPortalItem = new PortalItem(mPortal, "5be0bc3ee36c4e058f7b3cebc21c74e6");
        // create a map from a PortalItem
        mMap = new ArcGISMap(mPortalItem);
        // set the map to be displayed in this view
        mMapView.setMap(mMap);
        // close the drawer
        mDrawerLayout.closeDrawer(adapterView);
      } else if (position == 2) {
        mPortalItem = new PortalItem(mPortal, "064f2e898b094a17b84e4a4cd5e5f549");
        // create a map from a PortalItem
        mMap = new ArcGISMap(mPortalItem);
        // set the map to be displayed in this view
        mMapView.setMap(mMap);
        // close the drawer
        mDrawerLayout.closeDrawer(adapterView);
      }
    });
  }

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

      // called when drawer has settled in an open state
      @Override public void onDrawerOpened(View drawerView) {
        super.onDrawerOpened(drawerView);
        // change the title to the nav bar
        getSupportActionBar().setTitle(getResources().getString(R.string.navbar_title));
        // invalidate options menu
        invalidateOptionsMenu();
      }

      // called when drawer has settled in a closed state
      @Override public void onDrawerClosed(View view) {
        super.onDrawerClosed(view);
        // set title to the app
        getSupportActionBar().setTitle(mActivityTitle);
        // invalidate options menu
        invalidateOptionsMenu();
      }
    };
    // enable draw indicator
    mDrawerToggle.setDrawerIndicatorEnabled(true);
    // attach toggle to drawer layout
    mDrawerLayout.addDrawerListener(mDrawerToggle);
  }

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

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

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

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

  @Override public boolean onOptionsItemSelected(MenuItem item) {
    // activate the navigation drawer toggle
    return mDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);

  }
}