Java tutorial
/* * Copyright (C) 2014 barter.li * * 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 li.barter.fragments; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.location.Location; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; import com.android.volley.Request.Method; import org.json.JSONException; import org.json.JSONObject; import java.util.HashMap; import java.util.Locale; import java.util.Map; import li.barter.R; import li.barter.activities.AbstractBarterLiActivity.AlertStyle; import li.barter.activities.SelectPreferredLocationActivity; import li.barter.adapters.SelectLocationAdapter; import li.barter.analytics.AnalyticsConstants.Screens; import li.barter.fragments.dialogs.AddSingleEditTextDialogFragment; import li.barter.fragments.dialogs.EnableLocationDialogFragment; import li.barter.http.BlRequest; import li.barter.http.FoursquareCategoryBuilder; import li.barter.http.HttpConstants; import li.barter.http.HttpConstants.ApiEndpoints; import li.barter.http.HttpConstants.RequestId; import li.barter.http.IBlRequestContract; import li.barter.http.ResponseInfo; import li.barter.models.Venue; import li.barter.utils.AppConstants.DeviceInfo; import li.barter.utils.AppConstants.FragmentTags; import li.barter.utils.AppConstants.Keys; import li.barter.utils.Logger; import li.barter.utils.SharedPreferenceHelper; /** * @author Vinay S Shenoy Fragment for selecting a preferred location for exchanging books */ @FragmentTransition(enterAnimation = R.anim.slide_in_from_right, exitAnimation = R.anim.zoom_out, popEnterAnimation = R.anim.zoom_in, popExitAnimation = R.anim.slide_out_to_right) public class SelectPreferredLocationFragment extends AbstractBarterLiFragment implements OnItemClickListener, OnClickListener { private static final String TAG = "SelectPreferredLocationFragment"; /** * Radius for searching locations */ private static final int SEARCH_RADIUS_IN_METERS = 50000; /** * Foursquare Api versioning parameter. Visit https://developer.foursquare * .com/overview/versioning for more info */ private static final String FOURSQUARE_API_VERSION = "20140526"; /** * {@link Venue}s used to display nearby places */ private Venue[] mVenues; /** * Adapter for displaying list of locations nearby for selecting as user's preferred location */ private SelectLocationAdapter mSelectLocationAdapter; private ListView mVenueListView; private String mFoursquareClientId; private String mFoursquareClientSecret; private View mEmptyView; private AddSingleEditTextDialogFragment mAddLocationDialogFragment; private View mOverlayView; private boolean mIsOverlayShown; private EnableLocationDialogFragment mEnableLocationDialogFragment; @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { init(container, savedInstanceState); setHasOptionsMenu(true); final View contentView = inflater.inflate(R.layout.fragment_select_location, container, false); mVenueListView = (ListView) contentView.findViewById(R.id.list_locations); mSelectLocationAdapter = new SelectLocationAdapter(getActivity(), null, true); mVenueListView.setAdapter(mSelectLocationAdapter); mVenueListView.setOnItemClickListener(this); mEnableLocationDialogFragment = (EnableLocationDialogFragment) getFragmentManager() .findFragmentByTag(FragmentTags.DIALOG_ENABLE_LOCATION); mEmptyView = contentView.findViewById(R.id.empty_view); mEmptyView.setVisibility(View.GONE); mEmptyView.findViewById(R.id.text_try_again).setOnClickListener(this); mEmptyView.findViewById(R.id.text_add_manually).setOnClickListener(this); //showInfiniteCrouton(R.string.crouton_prefferedlocation_message, AlertStyle.INFO); mFoursquareClientId = getString(R.string.foursquare_client_id); mFoursquareClientSecret = getString(R.string.foursquare_client_secret); if (savedInstanceState != null) { mVenues = (Venue[]) savedInstanceState.getParcelableArray(Keys.LOCATIONS); mIsOverlayShown = savedInstanceState.getBoolean(Keys.OVERLAY_VISIBLE); } if (mIsOverlayShown) { showOverlay(); } if ((mVenues == null) || (mVenues.length == 0)) { fetchVenuesForLocation(DeviceInfo.INSTANCE.getLatestLocation(), SEARCH_RADIUS_IN_METERS); } else { mSelectLocationAdapter.setVenues(mVenues); } return contentView; } /** * Show the dialog for the user to add his name, in case it's not already added */ protected void showEnableLocationDialog() { mEnableLocationDialogFragment = new EnableLocationDialogFragment(); mEnableLocationDialogFragment.show(AlertDialog.THEME_HOLO_LIGHT, 0, R.string.enable_location, R.string.enable_location_message, R.string.enable, R.string.cancel, 0, getFragmentManager(), true, FragmentTags.DIALOG_ENABLE_LOCATION); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.menu_select_location, menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.action_about_select_location) { showOverlay(); return true; } else { return super.onOptionsItemSelected(item); } } /** * Show the overlay for this screen */ private void showOverlay() { if (mOverlayView == null) { mOverlayView = LayoutInflater.from(getActivity()) .inflate(R.layout.layout_overlay_about_prefered_location, null); } final Activity activity = getActivity(); if (activity instanceof SelectPreferredLocationActivity) { mOverlayView.setOnClickListener(this); mIsOverlayShown = true; ((SelectPreferredLocationActivity) activity).showOverlayView(mOverlayView); } } /** * Hides the overlay on the screen */ private void removeOverlay() { final Activity activity = getActivity(); if (activity instanceof SelectPreferredLocationActivity) { mIsOverlayShown = false; mOverlayView.setOnClickListener(null); ((SelectPreferredLocationActivity) activity).hideOverlayView(); } } /** * Fetch all the hangouts centered at the current location with the given radius * * @param location The location to search for hangouts * @param radius Tghe search radius(in meters) */ private void fetchVenuesForLocation(final Location location, final int radius) { if (location.getLatitude() == 0.0) { showEnableLocationDialog(); } else { final BlRequest request = new BlRequest(Method.GET, HttpConstants.getFoursquareUrl() + ApiEndpoints.FOURSQUARE_VENUES, null, mVolleyCallbacks); request.setRequestId(RequestId.FOURSQUARE_VENUES); final Map<String, String> params = new HashMap<String, String>(7); params.put(HttpConstants.LL, String.format(Locale.US, "%f,%f", location.getLatitude(), location.getLongitude())); params.put(HttpConstants.RADIUS, String.valueOf(radius)); final String foursquareCategoryFilter = FoursquareCategoryBuilder.init() .with(FoursquareCategoryBuilder.ARTS_AND_ENTERTAINMENT) .with(FoursquareCategoryBuilder.COLLEGE_AND_UNIVERSITY).with(FoursquareCategoryBuilder.FOOD) .with(FoursquareCategoryBuilder.NIGHTLIFE_SPOT) .with(FoursquareCategoryBuilder.OUTDOORS_AND_RECREATION) .with(FoursquareCategoryBuilder.PROFESSIONAL_AND_OTHER_PLACES) .with(FoursquareCategoryBuilder.SHOP_AND_SERVICE) .with(FoursquareCategoryBuilder.TRAVEL_AND_TRANSPORT).build(); Logger.v(TAG, "Foursquare Category Filter - %s", foursquareCategoryFilter); params.put(HttpConstants.CATEGORY_ID, foursquareCategoryFilter); params.put(HttpConstants.INTENT, HttpConstants.BROWSE); params.put(HttpConstants.CLIENT_ID, mFoursquareClientId); params.put(HttpConstants.CLIENT_SECRET, mFoursquareClientSecret); params.put(HttpConstants.V, FOURSQUARE_API_VERSION); request.setParams(params); addRequestToQueue(request, true, 0, false); } } /** * Fetch all the hangouts centered at the current location with the given radius without * category filter. This is used when there are no places with the categories supplied . * * @param location The location to search for hangouts * @param radius Tghe search radius(in meters) */ private void fetchVenuesForLocationWithoutCategoryFilter(final Location location, final int radius) { final BlRequest request = new BlRequest(Method.GET, HttpConstants.getFoursquareUrl() + ApiEndpoints.FOURSQUARE_VENUES, null, mVolleyCallbacks); request.setRequestId(RequestId.FOURSQUARE_VENUES_WITHOUT_CATEGORIES); final Map<String, String> params = new HashMap<String, String>(7); params.put(HttpConstants.LL, String.format(Locale.US, "%f,%f", location.getLatitude(), location.getLongitude())); params.put(HttpConstants.RADIUS, String.valueOf(radius)); params.put(HttpConstants.INTENT, HttpConstants.BROWSE); params.put(HttpConstants.CLIENT_ID, mFoursquareClientId); params.put(HttpConstants.CLIENT_SECRET, mFoursquareClientSecret); params.put(HttpConstants.V, FOURSQUARE_API_VERSION); request.setParams(params); addRequestToQueue(request, true, 0, false); } @Override public void onSaveInstanceState(final Bundle outState) { super.onSaveInstanceState(outState); outState.putParcelableArray(Keys.LOCATIONS, mVenues); outState.putBoolean(Keys.OVERLAY_VISIBLE, mIsOverlayShown); } @Override protected Object getTaskTag() { return hashCode(); } @Override public void onPause() { super.onPause(); cancelAllCroutons(); } @Override public void onSuccess(final int requestId, final IBlRequestContract request, final ResponseInfo response) { if (requestId == RequestId.FOURSQUARE_VENUES) { mVenues = (Venue[]) response.responseBundle.getParcelableArray(HttpConstants.LOCATIONS); if ((mVenues == null) || (mVenues.length == 0)) { fetchVenuesForLocationWithoutCategoryFilter(DeviceInfo.INSTANCE.getLatestLocation(), SEARCH_RADIUS_IN_METERS); } else { mSelectLocationAdapter.setVenues(mVenues); } } else if (requestId == RequestId.FOURSQUARE_VENUES_WITHOUT_CATEGORIES) { mVenues = (Venue[]) response.responseBundle.getParcelableArray(HttpConstants.LOCATIONS); mSelectLocationAdapter.setVenues(mVenues); mSelectLocationAdapter.notifyDataSetChanged(); if ((mVenues == null) || (mVenues.length == 0)) { mEmptyView.setVisibility(View.VISIBLE); } else { mEmptyView.setVisibility(View.GONE); mSelectLocationAdapter.setVenues(mVenues); } } else if (requestId == RequestId.SET_USER_PREFERRED_LOCATION) { SharedPreferenceHelper.set(R.string.pref_location, response.responseBundle.getString(HttpConstants.ID_LOCATION)); final Intent returnIntent = new Intent(); final Bundle arguments = getArguments(); if (arguments != null) { final Intent onwardIntent = arguments.getParcelable(Keys.ONWARD_INTENT); if (onwardIntent != null) { returnIntent.putExtra(Keys.ONWARD_INTENT, onwardIntent); } } getActivity().setResult(ActionBarActivity.RESULT_OK, returnIntent); getActivity().finish(); } } @Override public void onBadRequestError(final int requestId, final IBlRequestContract request, final int errorCode, final String errorMessage, final Bundle errorResponseBundle) { if (requestId == RequestId.FOURSQUARE_VENUES) { showCrouton(R.string.unable_to_fetch_hangouts, AlertStyle.ERROR); } else if (requestId == RequestId.FOURSQUARE_VENUES_WITHOUT_CATEGORIES) { showCrouton(R.string.unable_to_fetch_hangouts, AlertStyle.ERROR); } else if (requestId == RequestId.SET_USER_PREFERRED_LOCATION) { showCrouton(R.string.error_unable_to_set_preferred_location, AlertStyle.ERROR); } } @Override public void onOtherError(int requestId, IBlRequestContract request, int errorCode) { if (requestId == RequestId.FOURSQUARE_VENUES) { fetchVenuesForLocationWithoutCategoryFilter(DeviceInfo.INSTANCE.getLatestLocation(), SEARCH_RADIUS_IN_METERS); } else if (requestId == RequestId.FOURSQUARE_VENUES_WITHOUT_CATEGORIES) { showCrouton(R.string.unable_to_fetch_hangouts, AlertStyle.ERROR); mEmptyView.setVisibility(View.VISIBLE); } else if (requestId == RequestId.SET_USER_PREFERRED_LOCATION) { showCrouton(R.string.error_unable_to_set_preferred_location, AlertStyle.ERROR); } } @Override public boolean onBackPressed() { if (mIsOverlayShown) { removeOverlay(); return true; } else { return super.onBackPressed(); } } /** * Uploads the user preferred location to server * * @param name The name of the location * @param address The address of the location * @param latitude The latitude of the location * @param longitude The longitude of the location */ private void setUserPreferredLocation(final String name, final String address, final double latitude, final double longitude, final String city, final String state, final String country, final String foursquareId) { final JSONObject requestBody = new JSONObject(); try { requestBody.put(HttpConstants.NAME, name); requestBody.put(HttpConstants.ADDRESS, address); requestBody.put(HttpConstants.LATITUDE, latitude); requestBody.put(HttpConstants.LONGITUDE, longitude); requestBody.put(HttpConstants.CITY, city); requestBody.put(HttpConstants.STATE, state); requestBody.put(HttpConstants.COUNTRY, country); requestBody.put(HttpConstants.FOURSQUARE_ID, foursquareId); final BlRequest request = new BlRequest(Method.POST, HttpConstants.getApiBaseUrl() + ApiEndpoints.USER_PREFERRED_LOCATION, requestBody.toString(), mVolleyCallbacks); addRequestToQueue(request, true, 0, true); request.setRequestId(RequestId.SET_USER_PREFERRED_LOCATION); } catch (final JSONException e) { e.printStackTrace(); } } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (parent.getId() == R.id.list_locations) { final Venue venue = (Venue) mSelectLocationAdapter.getItem(position); setUserPreferredLocation(venue.name, venue.address, venue.latitude, venue.longitude, venue.city, venue.state, venue.country, venue.foursquareId); } } @Override protected String getAnalyticsScreenName() { return Screens.SELECT_PREFERRED_LOCATION; } @Override public void onClick(View v) { switch (v.getId()) { case R.id.text_add_manually: { showAddLocationDialog(); break; } case R.id.text_try_again: { fetchVenuesForLocation(DeviceInfo.INSTANCE.getLatestLocation(), SEARCH_RADIUS_IN_METERS); break; } case R.id.overlay: { removeOverlay(); break; } default: break; } } /** * Show the dialog for the user to enter his location detail */ private void showAddLocationDialog() { mAddLocationDialogFragment = new AddSingleEditTextDialogFragment(); mAddLocationDialogFragment.show(AlertDialog.THEME_HOLO_LIGHT, 0, R.string.preferred_location, R.string.submit, R.string.cancel, 0, R.string.hint_location_name, getFragmentManager(), true, FragmentTags.DIALOG_ADD_NAME); } /** * Whether this fragment will handle the particular dialog click or not * * @param dialog The dialog that was interacted with * @return <code>true</code> If the fragment will handle it, <code>false</code> otherwise */ public boolean willHandleDialog(final DialogInterface dialog) { if ((mAddLocationDialogFragment != null) && mAddLocationDialogFragment.getDialog().equals(dialog)) { return true; } else if ((mEnableLocationDialogFragment != null) && mEnableLocationDialogFragment.getDialog().equals(dialog)) { return true; } return false; } /** * Handle the click for the dialog. The fragment will receive this call, only if {@link * #willHandleDialog(DialogInterface)} returns <code>true</code> * * @param dialog The dialog that was interacted with * @param which The button that was clicked */ public void onDialogClick(final DialogInterface dialog, final int which) { if ((mAddLocationDialogFragment != null) && mAddLocationDialogFragment.getDialog().equals(dialog)) { if (which == DialogInterface.BUTTON_POSITIVE) { final String locationName = mAddLocationDialogFragment.getName(); final double latitude = DeviceInfo.INSTANCE.getLatestLocation().getLatitude(); final double longitude = DeviceInfo.INSTANCE.getLatestLocation().getLongitude(); if (!TextUtils.isEmpty(locationName)) { setUserPreferredLocation(locationName, "", latitude, longitude, "", "", "", ""); } } } else if ((mEnableLocationDialogFragment != null) && mEnableLocationDialogFragment.getDialog().equals(dialog)) { if (which == DialogInterface.BUTTON_POSITIVE) { // enable location Intent locationOptionsIntent = new Intent( android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivity(locationOptionsIntent); } else if (which == DialogInterface.BUTTON_NEGATIVE) { // cancel dialog.cancel(); } } } }