Java tutorial
package com.cloudbees.gasp.activity; import android.app.Activity; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.content.Intent; import android.content.SharedPreferences; import android.location.Location; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.NavUtils; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import com.cloudbees.gasp.R; import com.cloudbees.gasp.fragment.AddEventFragment; import com.cloudbees.gasp.fragment.DeleteEventFragment; import com.cloudbees.gasp.fragment.LocationFragment; import com.cloudbees.gasp.fragment.NearbySearchFragment; import com.cloudbees.gasp.fragment.PlaceDetailsFragment; import com.cloudbees.gasp.model.EventResponse; import com.cloudbees.gasp.model.Place; import com.cloudbees.gasp.model.PlaceDetails; import com.cloudbees.gasp.model.Places; import com.cloudbees.gasp.model.Query; import java.util.ArrayList; /** * Copyright (c) 2013 Mark Prichard, CloudBees * <p/> * 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 * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * 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. */ public class PlacesActivity extends Activity { private static final String TAG = PlacesActivity.class.getName(); private ArrayAdapter<String> mAdapter; private ListView mListView; private final ArrayList<String> mList = new ArrayList<String>(); private final ArrayList<String> mReferenceList = new ArrayList<String>(); private String mReference; private NearbySearchFragment mSearchFragment; private PlaceDetailsFragment mDetailsFragment; private AddEventFragment mAddEventFragment; private DeleteEventFragment mDeleteEventFragment; private static double lat = 37.3750274; private static double lng = -122.1142916; private static int radius = 500; private static String token = ""; public static void setLocation(double latitude, double longitude) { lat = latitude; lng = longitude; } private void showLocations(Places places) { for (Place place : places.getResults()) { Log.d(TAG, place.getName() + " " + place.getReference()); mAdapter.add(place.getName()); mReferenceList.add(place.getReference()); } } private void checkToken(Places places) { try { Button placesButton = (Button) findViewById(R.id.places_button); if (places.getNext_page_token() == null) { token = ""; Log.d(TAG, "No page token returned from Places API"); placesButton.setEnabled(false); } else { token = places.getNext_page_token(); Log.d(TAG, "Next page token: " + token); setButtonText(R.string.places_button_locations_next); placesButton.setEnabled(true); } } catch (Exception e) { e.printStackTrace(); } } private void showDetails(PlaceDetails placeDetails) { try { Intent intent = new Intent(); intent.setClass(PlacesActivity.this, PlacesDetailActivity.class); intent.putExtra(PlacesDetailActivity.PLACES_DETAIL_SERIALIZED, placeDetails.getResult()); intent.putExtra(PlacesDetailActivity.PLACES_DETAIL_REFERENCE, mReference); startActivityForResult(intent, 0); } catch (Exception e) { e.printStackTrace(); } } private void addPlacesFragments() { mSearchFragment = new NearbySearchFragment() { public void onSuccess(Places places) { showLocations(places); checkToken(places); } public void onFailure(String status) { Log.e(TAG, "Google Places API search failed: status = " + status); } }; mDetailsFragment = new PlaceDetailsFragment() { @Override public void onSuccess(PlaceDetails placeDetails) { showDetails(placeDetails); } @Override public void onFailure(String status) { Log.e(TAG, "Google Places API search failed: status = " + status); } }; mAddEventFragment = new AddEventFragment() { @Override public void onSuccess(EventResponse eventResponse) { Log.d(TAG, "Event Added: " + eventResponse.getEvent_id()); } @Override public void onFailure(String status) { Log.e(TAG, "Google Places API search failed: status = " + status); } }; mDeleteEventFragment = new DeleteEventFragment() { @Override public void onSuccess(EventResponse eventResponse) { Log.d(TAG, "Event Deleted"); } @Override public void onFailure(String status) { Log.e(TAG, "Google Places API search failed: status = " + status); } }; FragmentManager fm = getFragmentManager(); FragmentTransaction ft = fm.beginTransaction(); ft.add(mSearchFragment, getString(R.string.fragment_location_search)); ft.add(mDetailsFragment, getString(R.string.fragment_place_details)); ft.add(mAddEventFragment, getString(R.string.fragment_add_event)); ft.add(mDeleteEventFragment, getString(R.string.fragment_delete_event)); ft.commit(); } private void getLocations() { try { SharedPreferences gaspSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); radius = Integer.valueOf( gaspSharedPreferences.getString(getString(R.string.places_search_radius_preferences), "")); Query query = new Query(lat, lng, radius, token); mSearchFragment.nearbySearch(query); } catch (Exception e) { e.printStackTrace(); } } private void addButtonListener() { Button placesButton = (Button) findViewById(R.id.places_button); placesButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { getLocations(); } }); } private void addListViewAdapter() { try { // Use simple TextView layout for ArrayAdapter constructor and map to ListView setContentView(R.layout.gasp_places_layout); mListView = (ListView) findViewById(R.id.places_list); mAdapter = new ArrayAdapter<String>(this, R.layout.gasp_generic_textview, mList); mListView.setAdapter(mAdapter); } catch (Exception e) { e.printStackTrace(); } } private void addItemClickListener() { mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Log.d(TAG, "Clicked: item #" + id + ", " + mList.get((int) id) + " [" + mReferenceList.get((int) id) + "]"); mReference = mReferenceList.get((int) id); Query query = new Query(mReferenceList.get((int) id)); mDetailsFragment.placeDetails(query); } }); } private void setButtonText(int resId) { Button placesButton = (Button) findViewById(R.id.places_button); placesButton.setText(resId); } private void checkLocation() { try { Location location = LocationFragment.getLocation(this); if (location != null) { setLocation(location.getLatitude(), location.getLongitude()); } } catch (Exception e) { e.printStackTrace(); } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getActionBar().setDisplayHomeAsUpEnabled(true); try { checkLocation(); addPlacesFragments(); addListViewAdapter(); addButtonListener(); addItemClickListener(); getLocations(); } catch (Exception e) { e.printStackTrace(); } } @Override protected void onPause() { super.onPause(); token = ""; } @Override protected void onResume() { super.onResume(); } @Override protected void onDestroy() { super.onDestroy(); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.options_menu_short, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { // Respond to the action bar's Up/Home button case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; case R.id.gasp_settings: Intent intent = new Intent(); intent.setClass(this, SetPreferencesActivity.class); startActivityForResult(intent, 0); return true; case R.id.options_exit: finish(); return true; default: return super.onOptionsItemSelected(item); } } }