139 lines
4.3 KiB
Java
139 lines
4.3 KiB
Java
/*
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* Copyright 2010, 2011, 2012 mapsforge.org
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*
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* This program is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.oscim.view;
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import org.oscim.core.GeoPoint;
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import org.oscim.core.MapPosition;
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import android.app.Activity;
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import android.content.SharedPreferences;
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import android.content.SharedPreferences.Editor;
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/**
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* MapActivity is the abstract base class which must be extended in order to use
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* a {@link MapView}. There are no abstract methods in this implementation which
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* subclasses need to override and no API key or registration is required.
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* <p>
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* A subclass may create a MapView either via one of the MapView constructors or
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* by inflating an XML layout file. It is possible to use more than one MapView
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* at the same time.
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* <p>
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* When the MapActivity is shut down, the current center position, zoom level
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* and map file of the MapView are saved in a preferences file and restored in
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* the next startup process.
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*/
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public abstract class MapActivity extends Activity {
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private static final String KEY_LATITUDE = "latitude";
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private static final String KEY_LONGITUDE = "longitude";
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private static final String KEY_MAP_SCALE = "map_scale";
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private static final String PREFERENCES_FILE = "MapActivity";
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//private static final String KEY_THEME = "Theme";
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private static boolean containsMapViewPosition(SharedPreferences sharedPreferences) {
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return sharedPreferences.contains(KEY_LATITUDE)
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&& sharedPreferences.contains(KEY_LONGITUDE)
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&& sharedPreferences.contains(KEY_MAP_SCALE);
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}
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protected MapView mMapView;
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@Override
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protected void onDestroy() {
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super.onDestroy();
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mMapView.destroy();
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}
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@Override
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protected void onPause() {
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super.onPause();
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mMapView.onPause();
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Editor editor = getSharedPreferences(PREFERENCES_FILE, MODE_PRIVATE).edit();
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editor.clear();
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// save the map position
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MapPosition mapPosition = new MapPosition();
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mMapView.getMapViewPosition().getMapPosition(mapPosition);
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GeoPoint geoPoint = mapPosition.getGeoPoint();
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editor.putInt(KEY_LATITUDE, geoPoint.latitudeE6);
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editor.putInt(KEY_LONGITUDE, geoPoint.longitudeE6);
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editor.putFloat(KEY_MAP_SCALE, (float)mapPosition.scale);
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//editor.putString(KEY_THEME, mMapView.getRenderTheme());
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editor.commit();
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}
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@Override
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protected void onResume() {
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super.onResume();
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mMapView.onResume();
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}
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@Override
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protected void onStop() {
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super.onStop();
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mMapView.onStop();
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}
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/**
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* This method is called once by each MapView during its setup process.
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*
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* @param mapView
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* the calling MapView.
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*/
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final void registerMapView(MapView mapView) {
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mMapView = mapView;
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SharedPreferences sharedPreferences = getSharedPreferences(PREFERENCES_FILE,
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MODE_PRIVATE);
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if (containsMapViewPosition(sharedPreferences)) {
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// get and set the map position and zoom level
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int latitudeE6 = sharedPreferences.getInt(KEY_LATITUDE, 0);
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int longitudeE6 = sharedPreferences.getInt(KEY_LONGITUDE, 0);
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float scale = sharedPreferences.getFloat(KEY_MAP_SCALE, 1);
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MapPosition mapPosition = new MapPosition();
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mapPosition.setPosition(latitudeE6 / 1E6, longitudeE6 / 1E6);
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mapPosition.setScale(scale);
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mMapView.getMapViewPosition().setMapPosition(mapPosition);
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}
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//String theme = sharedPreferences.getString(KEY_THEME,
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// InternalRenderTheme.DEFAULT.name());
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// if (theme.startsWith("/")) {
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// try {
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// mapView.setRenderTheme(theme);
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// } catch (FileNotFoundException e) {
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// mapView.setRenderTheme(InternalRenderTheme.DEFAULT);
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// }
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// } else {
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// try {
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// mapView.setRenderTheme(InternalRenderTheme.valueOf(theme));
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// } catch (IllegalArgumentException e) {
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// mapView.setRenderTheme(InternalRenderTheme.DEFAULT);
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// }
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// }
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}
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}
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