Android Open Source - sigimera-android-app Crisis Activity

From Project

Back to project page sigimera-android-app.
License

The source code is released under:
GNU General Public License
If you think the Android project sigimera-android-app listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

/**
 * Sigimera Crises Information Platform Android Client
 * Copyright (C) 2012 by Sigimera/*  ww w .ja va  2 s .  com*/
 * All Rights Reserved
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.sigimera.app.android;

import java.util.List;

import org.sigimera.app.android.controller.DistanceController;
import org.sigimera.app.android.controller.LocationController;
import org.sigimera.app.android.controller.PersistanceController;
import org.sigimera.app.android.model.Constants;
import org.sigimera.app.android.model.Crisis;
import org.sigimera.app.android.model.map.CollectionOverlay;
import org.sigimera.app.android.util.Common;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;

import android.app.ProgressDialog;
import android.content.pm.ActivityInfo;
import android.graphics.Color;
import android.location.Location;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebView;
import android.widget.ShareActionProvider;
import android.widget.Toast;

/**
 * @author Corneliu-Valentin Stanciu, Alex Oberhauser
 * @e-mail corneliu.stanciu@sigimera.org, alex.oberhauser@sigimera.org
 */
public class CrisisActivity extends MapActivity {

  /**
   * The crisis instance.
   */
  private Crisis crisis;

  /**
   * The google map controller.
   */
  private MapController mapControl;

  /**
   * Map overlays for adding items on the map.
   */
  private List<Overlay> mapOverlays;

  /**
   * The collections where the items are added.
   */
  private CollectionOverlay collectionOverlay;

  /**
   * GUI handler needed for starting the thread in background.
   */
  private final Handler guiHandler = new Handler();

  /**
   * Method which is stared in background for updating the GUI.
   */
  private final Runnable updateCollection = new Runnable() {
    public void run() {
      try {
        updateMap();
      } catch ( Exception e ) {
        System.out.println("Not able to update map, through exception: " + e.toString());
      }
    }
  };

  @Override
  protected final void onCreate(final Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.crisis_info);
    this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

    final ProgressDialog progressDialog = ProgressDialog.show(
        CrisisActivity.this, null, "Loading crisis map...", false);

    Thread seeker = new Thread() {
      @Override
      public void run() {
        Looper.prepare();
        try {
          String crisisID = getIntent().getStringExtra(
              Constants.CRISIS_ID);
          String authToken = getSharedPreferences(
              Constants.PREFS_NAME, 0).getString("auth_token",
              null);

          if (null != crisisID) {
            crisis = PersistanceController.getInstance().getCrisis(
                authToken, crisisID);
          } else {
            crisis = PersistanceController.getInstance()
                .getLatestCrisis(authToken);
          }

          final MapView mapView = (MapView) findViewById(R.id.mapview);
          mapView.setSatellite(true);

          mapOverlays = mapView.getOverlays();
          collectionOverlay = new CollectionOverlay(getResources()
              .getDrawable(
                  Common.getCrisisIcon(crisis.getSubject())));

          mapControl = mapView.getController();
          mapControl.setZoom(4);
          mapControl.stopPanning();
          mapControl.setCenter(new GeoPoint(0, 0));

          WebView infoview = (WebView) findViewById(R.id.crisis_info_webview);
          infoview.setBackgroundColor(Color.BLACK);

          Location userLocation = LocationController.getInstance()
              .getLastKnownLocation();

          StringBuffer content = new StringBuffer();
          content.append("<html>");
          content.append("<body style='color: white;'>");

          content.append(getCrisisHTMLContent(userLocation));

          content.append("<br />");
          content.append("</body>");
          content.append("</html>");
          infoview.loadData(content.toString(), "text/html", "UTF-8");

        } finally {
          progressDialog.dismiss();
        }
        guiHandler.post(updateCollection);
      }
    };
    seeker.start();
  }

  @Override
  public final boolean onCreateOptionsMenu(final Menu menu) {
    getMenuInflater().inflate(R.menu.crisis_info_menu, menu);
    MenuItem menuItem = menu.findItem(R.id.menu_share);
    ShareActionProvider mShareActionProvider = (ShareActionProvider) menuItem
        .getActionProvider();
    mShareActionProvider
        .setShareHistoryFileName("crisis_share_history.xml");
    if (crisis == null) {
      String authToken = getSharedPreferences(Constants.PREFS_NAME, 0)
          .getString("auth_token", null);
      crisis = PersistanceController.getInstance().getLatestCrisis(
          authToken);
    }
    mShareActionProvider.setShareIntent(Common.shareCrisis(crisis.getID(),
        crisis.getShortTitle()));

    return super.onCreateOptionsMenu(menu);
  }

  /**
   * Retrieves the content of a crisis as HTML blob.
   * 
   * @param userLocation
   *            The users location
   * @return The content of crisis as HTML blob
   */
  private String getCrisisHTMLContent(final Location userLocation) {
    if (null == crisis) {
      return "No crisis found!";
    }

    StringBuffer content = new StringBuffer();

    // Show crisis title
    content.append("<i>" + crisis.getShortTitle() + "</i>");
    content.append("<hr />");

    // Show distance, date and severity|population|subject in a table
    content.append("<table width='100%'>");
    content.append("<tr>");
    content.append(this.getTableHTMLContent(
        DistanceController.computeDistance(userLocation.getLatitude(),
            userLocation.getLongitude(), crisis.getLatitude(),
            crisis.getLongitude())
            + "km", "Distance"));
    content.append(this.getTableHTMLSeparator());
    content.append(this.getTableHTMLContent(Common.getTimeAgoInWords(Common
        .getMiliseconds(crisis.getDate())), "Date"));
    content.append(this.getTableHTMLSeparator());

    if (crisis.getSeverityHashValue() != null
        && crisis.getSeverityHashUnit() != null) {
      content.append(this.getTableHTMLContent(
          crisis.getSeverityHashValue()
              + crisis.getSeverityHashUnit(), "Severity"));
    } else if (crisis.getPopulationHashValue() != null
        && crisis.getPopulationHashUnit() != null) {
      content.append(this.getTableHTMLContent(
          crisis.getPopulationHashValue()
              + crisis.getPopulationHashUnit(), "Affected people"));
    } else {
      content.append(this.getTableHTMLContent(
          Common.capitalize(crisis.getSubject()), "Type"));
    }
    content.append("</tr>");
    content.append("</table>");

    content.append("<hr />");

    // Show the crisis descrioption
    content.append("<p style='text-align: justify'><small>"
        + crisis.getDescription() + "</small></p>");

    // Show the start and end dates
    if (crisis.getPopulationHashValue() != null) {
      content.append("<table width='100%'>");
      content.append("<tr>");
      content.append(this.getTableHTMLContent(
          crisis.getPopulationHashValue(), "Affected people"));
      content.append(this.getTableHTMLSeparator());
      content.append(this.getTableHTMLContent(crisis.getStartDate(),
          "Start date"));
      content.append("</tr>");
      content.append("</table>");
    }

    return content.toString();
  }

  /**
   * Update the map with the coordinates of the forwarded crisis.
   */
  private void updateMap() {
    GeoPoint geo = new GeoPoint((int) (crisis.getLatitude() * 1E6),
        (int) (crisis.getLongitude() * 1E6));
    mapControl.setCenter(geo);
    OverlayItem overlayitem = new OverlayItem(geo, "", "");
    this.collectionOverlay.addOverlay(overlayitem);
    this.mapOverlays.add(this.collectionOverlay);
  }

  /**
   * Retrieve the content of crisis in a table HTML blob.
   *  
   * @param content The crisis content
   * @param helpText The text which will be showed beyond the content.
   * @return The crisis content as HTML table
   */
  private String getTableHTMLContent(final String content,
      final String helpText) {
    StringBuffer element = new StringBuffer();
    element.append("<td>");
    element.append(content + "<br/>");
    element.append("<small style='color: #00FFFF;'><small>" + helpText
        + "</small></small>");
    element.append("</td>");
    return element.toString();
  }

  /**
   * 
   * @return an HTML table separator (as row - <td>).
   */
  private String getTableHTMLSeparator() {
    return "<td style='border-left: solid 1px white'></td>";
  }

  @Override
  protected final boolean isRouteDisplayed() { return false; }
}
Java Source Code List
