Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * 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.dustinmreed.openwifi; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v7.app.ActionBarActivity; import android.support.v7.widget.ShareActionProvider; import android.support.v7.widget.Toolbar; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.dustinmreed.openwifi.data.WifiLocationContract; import com.dustinmreed.openwifi.data.WifiLocationContract.WiFiLocationEntry; import com.google.android.gms.maps.CameraUpdate; import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.MapView; import com.google.android.gms.maps.MapsInitializer; import com.google.android.gms.maps.model.BitmapDescriptorFactory; import com.google.android.gms.maps.model.CameraPosition; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.LatLngBounds; import com.google.android.gms.maps.model.Marker; import com.google.android.gms.maps.model.MarkerOptions; import java.util.ArrayList; import java.util.List; import static com.dustinmreed.openwifi.Utilities.getFormattedAddress; public class MapActivityFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> { // These indices are tied to DETAIL_COLUMNS. If DETAIL_COLUMNS changes, these // must change. static final int COL_WIFILOCATION_NAME = 1; static final int COL_WIFILOCATION_TYPE = 2; static final int COL_WIFILOCATION_LAT = 4; static final int COL_WIFILOCATION_LONG = 5; static final int COL_WIFILOCATION_ADDRESS = 6; static final int COL_WIFILOCATION_CITY = 7; static final int COL_WIFILOCATION_STATE = 8; static final int COL_WIFILOCATION_ZIPCODE = 9; static final String DETAIL_URI = "URI"; private static final String FORECAST_SHARE_HASHTAG = " #OpenWiFIApp"; private static final int DETAIL_LOADER = 0; private static final String[] DETAIL_COLUMNS = { WiFiLocationEntry._ID, WiFiLocationEntry.COLUMN_SITE_NAME, WiFiLocationEntry.COLUMN_SITE_TYPE, WiFiLocationEntry.COLUMN_STREET_ADDRESS, WiFiLocationEntry.COLUMN_COORD_LAT, WiFiLocationEntry.COLUMN_COORD_LONG, WiFiLocationEntry.COLUMN_ADDRESS, WiFiLocationEntry.COLUMN_CITY, WiFiLocationEntry.COLUMN_STATE, WiFiLocationEntry.COLUMN_ZIPCODE, }; MapView mapView; GoogleMap map; private ShareActionProvider mShareActionProvider; private String mWiFiLocation; private String siteName; private CameraUpdate cu; private CameraPosition cp; public MapActivityFragment() { setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Needs to call MapsInitializer before doing any CameraUpdateFactory calls MapsInitializer.initialize(this.getActivity()); Toolbar toolbar = (Toolbar) getActivity().findViewById(R.id.app_bar); ActionBarActivity activity = (ActionBarActivity) getActivity(); activity.setSupportActionBar(toolbar); activity.getSupportActionBar().setDisplayHomeAsUpEnabled(true); View rootView = inflater.inflate(R.layout.fragment_map, container, false); mapView = (MapView) rootView.findViewById(R.id.fullmapview); // Gets the MapView from the XML layout and creates it if (mapView != null) { mapView.onCreate(savedInstanceState); } return rootView; } @Override public void onActivityCreated(Bundle savedInstanceState) { getLoaderManager().initLoader(DETAIL_LOADER, null, this); super.onActivityCreated(savedInstanceState); } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { Uri wifiForLocationUri = WifiLocationContract.WiFiLocationEntry.buildWiFiLocation(); if (null != wifiForLocationUri) { // Now create and return a CursorLoader that will take care of // creating a Cursor for the data being displayed. return new CursorLoader(getActivity(), wifiForLocationUri, DETAIL_COLUMNS, null, null, null); } return null; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data) { List<Marker> markers = new ArrayList<>(); if (data != null && data.moveToFirst()) { data.moveToFirst(); while (!data.isAfterLast()) { siteName = data.getString(COL_WIFILOCATION_NAME); String siteType = data.getString(COL_WIFILOCATION_TYPE); final String siteAddress = data.getString(COL_WIFILOCATION_ADDRESS); final String siteCity = data.getString(COL_WIFILOCATION_CITY); String siteState = data.getString(COL_WIFILOCATION_STATE); String siteZipcode = data.getString(COL_WIFILOCATION_ZIPCODE); Double latitude = Double.valueOf(data.getString(COL_WIFILOCATION_LAT)); Double longitude = Double.valueOf(data.getString(COL_WIFILOCATION_LONG)); // Gets to GoogleMap from the MapView and does initialization stuff map = mapView.getMap(); map.getUiSettings().setMyLocationButtonEnabled(false); Marker newmarker; LatLng latlng = new LatLng(latitude, longitude); switch (siteType) { case "Library": newmarker = map.addMarker(new MarkerOptions().position(latlng).title(siteName) .snippet(getFormattedAddress(siteAddress, siteCity, siteState, siteZipcode)) .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))); break; case "Regional Community Center": newmarker = map.addMarker(new MarkerOptions().position(latlng).title(siteName) .snippet(getFormattedAddress(siteAddress, siteCity, siteState, siteZipcode)) .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE))); break; default: newmarker = map.addMarker(new MarkerOptions().position(latlng).title(siteName) .snippet(getFormattedAddress(siteAddress, siteCity, siteState, siteZipcode)) .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW))); break; } markers.add(newmarker); data.moveToNext(); } LatLngBounds.Builder builder = new LatLngBounds.Builder(); for (Marker marker : markers) { builder.include(marker.getPosition()); } LatLngBounds bounds = builder.build(); int padding = 100; // offset from edges of the map in pixels cu = CameraUpdateFactory.newLatLngBounds(bounds, padding); try { map.moveCamera(cu); map.animateCamera(cu); } catch (IllegalStateException ise) { map.setOnMapLoadedCallback(new GoogleMap.OnMapLoadedCallback() { @Override public void onMapLoaded() { map.moveCamera(cu); map.animateCamera(cu); } }); } } } @Override public void onLoaderReset(Loader<Cursor> loader) { } @Override public void onResume() { super.onResume(); mapView.onResume(); if (cp != null) { map.moveCamera(CameraUpdateFactory.newCameraPosition(cp)); cp = null; } } @Override public void onPause() { mapView.onPause(); super.onPause(); cp = map.getCameraPosition(); map = null; } @Override public void onDestroy() { super.onDestroy(); mapView.onDestroy(); } @Override public void onLowMemory() { super.onLowMemory(); mapView.onLowMemory(); } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); mapView.onSaveInstanceState(outState); } }