Java tutorial
/* * Copyright (C) 2015 University of South Florida, Sean J. Barbeau (sjbarbeau@gmail.com) * * 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 org.onebusaway.android.map.googlemapsv2; import com.google.android.gms.common.GooglePlayServicesNotAvailableException; import com.google.android.gms.common.GooglePlayServicesRepairableException; import com.google.android.gms.location.places.Place; import com.google.android.gms.location.places.ui.PlaceAutocomplete; 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 org.onebusaway.android.R; import org.onebusaway.android.directions.util.CustomAddress; import org.onebusaway.android.io.elements.ObaRegion; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.net.Uri; import android.support.v4.app.Fragment; import android.view.View; /** * Helper methods specific to Google Maps API v2 */ public class ProprietaryMapHelpV2 { private static final String TAG = "ProprietaryMapHelpV2"; private static final String PLACES_ADDRESS_SEPARATOR = ","; /** * Returns true if Android Maps V2 is installed, false if it is not */ public static boolean isMapsInstalled(Context context) { try { ApplicationInfo info = context.getPackageManager().getApplicationInfo("com.google.android.apps.maps", 0); return true; } catch (PackageManager.NameNotFoundException e) { return false; } } /** * Prompts the user to install Android Maps V2 from Google Play */ public static void promptUserInstallMaps(final Context context) { AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setMessage(context.getString(R.string.please_install_google_maps_dialog_title)); builder.setCancelable(false); builder.setPositiveButton(context.getString(R.string.install_google_maps_positive_button), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(context.getString(R.string.android_maps_v2_market_url))); ResolveInfo info = context.getPackageManager().resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY); if (info != null) { context.startActivity(intent); } else { // User doesn't have Play Store installed AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setMessage(context.getString(R.string.no_play_store)); builder.setCancelable(true); builder.setPositiveButton(context.getString(R.string.ok), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.dismiss(); } }); AlertDialog d = builder.create(); d.show(); } } }); AlertDialog dialog = builder.create(); dialog.show(); } /** * Decode the result of an Intent to Google Places Autocomplete into a CustomAddress. * Here because of LatLng, Place which are specific to Google Places API. */ public static CustomAddress getCustomAddressFromPlacesIntent(Context context, Intent intent) { Place place = PlaceAutocomplete.getPlace(context, intent); CustomAddress address = new CustomAddress(); String placeName = place.getName().toString(); address.setAddressLine(0, placeName); String addressString = place.getAddress().toString(); String[] tokens = addressString.split(PLACES_ADDRESS_SEPARATOR); // Posible that first line of address is place name. int start = placeName.equals(tokens[0]) ? 1 : 0; int j = 1; // address line index for (int i = start; i < tokens.length; i++) { address.setAddressLine(j++, tokens[i]); } LatLng loc = place.getLatLng(); address.setLatitude(loc.latitude); address.setLongitude(loc.longitude); return address; } /** * Helper class to start Google Places Autocomplete when a field is clicked. * Does not check that Google API is available. * Here because of the use of LatLngBounds. Decode result with * getCustomAddressFromPlacesIntent. */ public static class StartPlacesAutocompleteOnClick implements View.OnClickListener { int mRequestCode; Fragment mFragment; ObaRegion mRegion; public StartPlacesAutocompleteOnClick(int requestCode, Fragment fragment, ObaRegion region) { mRequestCode = requestCode; mFragment = fragment; mRegion = region; } @Override public void onClick(View v) { Intent intent = null; PlaceAutocomplete.IntentBuilder builder = new PlaceAutocomplete.IntentBuilder( PlaceAutocomplete.MODE_OVERLAY); if (mRegion != null) { // Bias search results to region bounds LatLngBounds bounds = MapHelpV2.getRegionBounds(mRegion); builder.setBoundsBias(bounds); } try { intent = builder.build(mFragment.getActivity()); } catch (GooglePlayServicesRepairableException e) { e.printStackTrace(); } catch (GooglePlayServicesNotAvailableException e) { e.printStackTrace(); } mFragment.startActivityForResult(intent, mRequestCode); } } /** * Sets the zIndex for the given marker to the given zIndex. This is in ProprietaryMapHelpV2 * because there is no such corresponding Marker.setZIndex() method on Amazon Maps v2. * @param m marker to set the zIndex for * @param zIndex zIndex to set on the given marker (default is 0) */ public static void setZIndex(Marker m, float zIndex) { m.setZIndex(zIndex); } }