335 lines
12 KiB
Java
335 lines
12 KiB
Java
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/**
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* MainActivityFragment.java
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* Implements the main fragment of the main activity
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* This fragment displays a map using osmdroid
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*
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* This file is part of
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* TRACKBOOK - Movement Recorder for Android
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*
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* Copyright (c) 2016 - Y20K.org
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* Licensed under the MIT-License
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* http://opensource.org/licenses/MIT
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*
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* Trackbook uses osmdroid - OpenStreetMap-Tools for Android
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* https://github.com/osmdroid/osmdroid
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*/
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package org.y20k.trackbook;
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import android.app.Activity;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.location.Location;
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import android.location.LocationListener;
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import android.location.LocationManager;
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import android.os.Bundle;
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import android.preference.PreferenceManager;
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import android.support.v4.app.Fragment;
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import android.util.DisplayMetrics;
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import android.view.LayoutInflater;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.Toast;
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import org.osmdroid.api.IMapController;
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import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
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import org.osmdroid.util.GeoPoint;
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import org.osmdroid.views.MapView;
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import org.osmdroid.views.overlay.ItemizedIconOverlay;
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import org.osmdroid.views.overlay.compass.CompassOverlay;
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import org.osmdroid.views.overlay.compass.InternalCompassOrientationProvider;
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import org.y20k.trackbook.helpers.LocationHelper;
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import org.y20k.trackbook.helpers.LogHelper;
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import org.y20k.trackbook.helpers.MapHelper;
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import org.y20k.trackbook.helpers.TrackbookKeys;
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import java.util.List;
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/**
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* MainActivityFragment class
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*/
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public class MainActivityFragment extends Fragment implements TrackbookKeys {
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/* Define log tag */
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private static final String LOG_TAG = MainActivityFragment.class.getSimpleName();
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/* Main class variables */
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private Activity mActivity;
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private MapView mMapView;
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private IMapController mController;
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private CompassOverlay mCompassOverlay = null;
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private LocationManager mLocationManager;
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private LocationListener mGPSListener;
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private LocationListener mNetworkListener;
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private Location mCurrentBestLocation;
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private ItemizedIconOverlay mMyLocationOverlay;
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/* Constructor (default) */
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public MainActivityFragment() {
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}
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// get activity
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mActivity = getActivity();
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// action bar has options menu
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setHasOptionsMenu(true);
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// acquire reference to Location Manager
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mLocationManager = (LocationManager) mActivity.getSystemService(Context.LOCATION_SERVICE);
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// get last know location
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List locationProviders = mLocationManager.getProviders(true);
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if (locationProviders.size() > 0) {
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mCurrentBestLocation = LocationHelper.determineLastKnownLocation(mLocationManager);
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} else {
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promptUserForLocation();
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}
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}
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
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// create basic map
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mMapView = new MapView(inflater.getContext());
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// get display metrics
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final DisplayMetrics dm = mActivity.getResources().getDisplayMetrics();
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// get map controller
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mController = mMapView.getController();
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// basic map setup
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mMapView.setTileSource(TileSourceFactory.MAPNIK);
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mMapView.setTilesScaledToDpi(true);
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// add multi-touch capability
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mMapView.setMultiTouchControls(true);
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// initiate map state
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if (savedInstanceState != null) {
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// restore saved instance of map
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GeoPoint position = new GeoPoint(savedInstanceState.getDouble(INSTANCE_LATITUDE), savedInstanceState.getDouble(INSTANCE_LONGITUDE));
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mController.setCenter(position);
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mController.setZoom(savedInstanceState.getInt(INSTANCE_ZOOM_LEVEL, 16));
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// restore current location
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mCurrentBestLocation = savedInstanceState.getParcelable(INSTANCE_CURRENT_LOCATION);
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} else if (mCurrentBestLocation != null) {
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// fallback or first run: set map to current position
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GeoPoint position = new GeoPoint(mCurrentBestLocation.getLatitude(), mCurrentBestLocation.getLongitude());
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mController.setCenter(position);
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mController.setZoom(16);
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}
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// add compass to map
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mCompassOverlay = new CompassOverlay(mActivity, new InternalCompassOrientationProvider(mActivity), mMapView);
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mCompassOverlay.enableCompass();
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mMapView.getOverlays().add(mCompassOverlay);
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// mark user's location on map
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if (mCurrentBestLocation != null) {
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mMyLocationOverlay = MapHelper.createMyLocationOverlay(mActivity, mCurrentBestLocation);
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mMapView.getOverlays().add(mMyLocationOverlay);
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}
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return mMapView;
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}
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@Override
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public void onResume() {
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super.onResume();
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// start tracking position
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startFindingLocation();
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}
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@Override
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public void onPause() {
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super.onPause();
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// disable location listener
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stopFindingLocation();
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}
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@Override
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public void onDestroyView(){
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super.onDestroyView();
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// deactivate map
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mMapView.onDetach();
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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// handle action bar options menu selection
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switch (item.getItemId()) {
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// CASE MY LOCATION
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case R.id.action_my_location:
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Toast.makeText(mActivity, mActivity.getString(R.string.toast_message_my_location), Toast.LENGTH_LONG).show();
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if (mLocationManager.getProviders(true).size() == 0) {
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// location services are off - ask user to turn them on
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promptUserForLocation();
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return true;
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}
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// get current position
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GeoPoint position;
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if (mCurrentBestLocation != null) {
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// app has a current best estimate location
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position = new GeoPoint(mCurrentBestLocation.getLatitude(), mCurrentBestLocation.getLongitude());
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} else {
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// app does not have any location fix
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mCurrentBestLocation = LocationHelper.determineLastKnownLocation(mLocationManager);
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position = new GeoPoint(mCurrentBestLocation.getLatitude(), mCurrentBestLocation.getLongitude());
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}
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// center map on current position
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mController.setCenter(position);
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// mark user's new location on map and remove last marker
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mMapView.getOverlays().remove(mMyLocationOverlay);
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mMyLocationOverlay = MapHelper.createMyLocationOverlay(mActivity, mCurrentBestLocation);
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mMapView.getOverlays().add(mMyLocationOverlay);
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return true;
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// CASE DEFAULT
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default:
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return super.onOptionsItemSelected(item);
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}
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}
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@Override
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public void onSaveInstanceState(Bundle outState) {
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// save map position
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outState.putDouble(INSTANCE_LATITUDE, mMapView.getMapCenter().getLatitude());
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outState.putDouble(INSTANCE_LONGITUDE, mMapView.getMapCenter().getLongitude());
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outState.putInt(INSTANCE_ZOOM_LEVEL, mMapView.getZoomLevel());
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outState.putParcelable(INSTANCE_CURRENT_LOCATION, mCurrentBestLocation);
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super.onSaveInstanceState(outState);
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}
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/* Start finding location for map */
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private void startFindingLocation() {
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// listener that responds to location updates
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mGPSListener = createLocationsListener();
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mNetworkListener = createLocationsListener();
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// start listener
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List locationProviders = mLocationManager.getProviders(true);
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if (locationProviders.contains(LocationManager.GPS_PROVIDER)) {
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try {
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// enable location listener (gps)
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mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mGPSListener);
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} catch (SecurityException e) {
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// catches permission problems
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e.printStackTrace();
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}
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} else if (locationProviders.contains(LocationManager.NETWORK_PROVIDER)) {
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try {
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// enable location listener (network)
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mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, mNetworkListener);
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} catch (SecurityException e) {
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// catches permission problems
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e.printStackTrace();
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}
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}
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}
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/* Stops finding location for map */
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private void stopFindingLocation() {
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// disable location listeners
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List locationProviders = mLocationManager.getProviders(true);
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if (locationProviders.contains(LocationManager.GPS_PROVIDER)) {
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try {
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mLocationManager.removeUpdates(mGPSListener);
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} catch (SecurityException e) {
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// catches permission problems
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e.printStackTrace();
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}
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} else if (locationProviders.contains(LocationManager.NETWORK_PROVIDER)) {
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try {
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mLocationManager.removeUpdates(mNetworkListener);
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} catch (SecurityException e) {
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// catches permission problems
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e.printStackTrace();
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}
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}
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}
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/* Creates listener for changes in location status */
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private LocationListener createLocationsListener() {
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return new LocationListener() {
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public void onLocationChanged(Location location) {
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// check if the new location is better
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if (LocationHelper.isBetterLocation(location, mCurrentBestLocation)) {
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// save location
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mCurrentBestLocation = location;
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// mark user's new location on map and remove last marker
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mMapView.getOverlays().remove(mMyLocationOverlay);
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mMyLocationOverlay = MapHelper.createMyLocationOverlay(mActivity, mCurrentBestLocation);
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mMapView.getOverlays().add(mMyLocationOverlay);
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}
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}
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public void onStatusChanged(String provider, int status, Bundle extras) {
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// TODO do something
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}
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public void onProviderEnabled(String provider) {
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LogHelper.v(LOG_TAG, "Location provider enabled: " + provider);
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}
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public void onProviderDisabled(String provider) {
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LogHelper.v(LOG_TAG, "Location provider disabled: " + provider);
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}
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};
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}
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/* Prompts user to turn on location */
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private void promptUserForLocation() {
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// TODO prompt user to turn on location
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Toast.makeText(mActivity, mActivity.getString(R.string.toast_message_location_offline), Toast.LENGTH_LONG).show();
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}
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/* Saves state of map */
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private void saveMaoState(Context context) {
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SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
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SharedPreferences.Editor editor = settings.edit();
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editor.putInt(PREFS_ZOOM_LEVEL, mMapView.getZoomLevel());
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editor.apply();
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}
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/* Loads app state from preferences */
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private void loadMapState(Context context) {
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SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
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int zoom = settings.getInt(PREFS_ZOOM_LEVEL, 16);
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}
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}
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