Android Open Source - grtransit Stops Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2011 Giles Malet.//w  w  w .j av  a  2 s  .c  om
 *
 * This file is part of GRTransit.
 * 
 * GRTransit 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 3 of the License, or
 * (at your option) any later version.
 * 
 * GRTransit 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 GRTransit.  If not, see <http://www.gnu.org/licenses/>.
 */

package net.kw.shrdlu.grtgtfs.Activities;

import android.content.Intent;
import android.database.Cursor;
import android.graphics.Rect;
import android.location.Location;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Window;
import android.widget.Toast;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapController;

import net.kw.shrdlu.grtgtfs.DatabaseHelper;
import net.kw.shrdlu.grtgtfs.NotificationCallback;
import net.kw.shrdlu.grtgtfs.R;

public class StopsActivity extends MenuMapActivity {
  private static final String TAG = "StopsActivity";

  private String mStopId;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    mContext = this;

        // Will use the action bar progress bar
        requestWindowFeature(Window.FEATURE_PROGRESS);

        super.onCreate(savedInstanceState);

    // See if we're entering as a result of a search. Show given stop if so,
    // else will try show current location.
    final String stopstr = mContext.getApplicationContext().getPackageName() + ".stop_id";
    final Intent intent = getIntent();
    mStopId = intent.getStringExtra(stopstr);

    if (mStopId != null && mStopId.equals("2040")) {
      Toast.makeText(mContext, "Aaaaarrrrr!", Toast.LENGTH_LONG).show();
    }

    // Get the busstop overlay set up in the background
    new LoadOverlay().execute();
  }

  /**
   * Background task to handle initial load of the bus stops.
     * When finished, it transitions back to the GUI thread where it
   * updates with the newly-found entries.
   */
  private class LoadOverlay extends AsyncTask<Void, Integer, Void> implements NotificationCallback {

    // A callback from LoadDB, for updating our progress bar
    @Override
    public void notificationCallback(Integer progress) {
      publishProgress(progress);
    }

    @Override
    protected void onPreExecute() {
            setProgressBarVisibility(true);
    }

    // Update the progress bar.
    @Override
    protected void onProgressUpdate(Integer... parms) {
            setProgress(parms[0]);
    }

    /**
     * Perform the background query.
     */
    @Override
    protected Void doInBackground(Void... foo) {
      mStopsOverlay.LoadDB(null, null, this);
      return null;
    }

    /**
     * When finished, link in the new overlay.
     */
    @Override
    protected void onPostExecute(Void foo) {
      // Log.v(TAG, "onPostExecute()");

      mapOverlays.add(mStopsOverlay);

      // Centre the map over given bus stop, else location, else the whole
      // area
      final MapController mcp = mMapview.getController();
      GeoPoint center;
      if (mStopId == null) {
        center = mMylocation.getMyLocation();
        if (center == null) {
          final Location l = mMylocation.getLastFix();
          if (l != null) {
            Toast.makeText(mContext, R.string.last_location_fix, Toast.LENGTH_LONG).show();
            center = new GeoPoint((int) (l.getLatitude() * 1000000), (int) (l.getLongitude() * 1000000));
          }
        }
        if (center != null) {
          mcp.animateTo(center);
          while (mMapview.getZoomLevel() < 17) {
            if (!mcp.zoomIn()) {
              break;
            }
          }
        } else {
          Toast.makeText(mContext, R.string.no_location_fix, Toast.LENGTH_LONG).show();
          final Rect boundingbox = mStopsOverlay.getBoundingBoxE6();
          mcp.setCenter(new GeoPoint(boundingbox.centerX(), boundingbox.centerY()));
          mcp.zoomToSpan(boundingbox.right - boundingbox.left, boundingbox.bottom - boundingbox.top);
        }
      } else {
        final String table = "stops", where = "stop_id = ?";
        final String[] columns = { "stop_lat", "stop_lon" }, selectargs = { mStopId };
        final Cursor locn = DatabaseHelper.ReadableDB().query(table, columns, where, selectargs, null, null, null);
        if (locn.moveToFirst()) {
          final int stop_lat = (int) (locn.getFloat(0) * 1000000); // microdegrees
          final int stop_lon = (int) (locn.getFloat(1) * 1000000);
          center = new GeoPoint(stop_lat, stop_lon);
          mcp.setCenter(center);
          mcp.setZoom(19);
        }
        locn.close();
      }

            getActionBar().setTitle(R.string.title_mapstops);
            getActionBar().setSubtitle(null);
            setProgress(10000); // max -- makes it slide away
    }
  }
}

Java Source Code List

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