Java tutorial
/* * The CroudTrip! application aims at revolutionizing the car-ride-sharing market with its easy, * user-friendly and highly automated way of organizing shared Trips. Copyright (C) 2015 Nazeeh Ammari, * Philipp Eichhorn, Ricarda Hohn, Vanessa Lange, Alexander Popp, Frederik Simon, Michael Weber * This program is free software: you can redistribute it and/or modify it under the terms of the GNU * Affero General Public License as published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public License along with this program. * If not, see http://www.gnu.org/licenses/. */ package org.croudtrip.activities; import android.app.AlarmManager; import android.app.PendingIntent; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.location.Location; import android.location.LocationManager; import android.nfc.NfcAdapter; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.content.LocalBroadcastManager; import android.support.v7.app.AlertDialog; import android.view.LayoutInflater; import android.view.View; import android.widget.CheckBox; import com.google.android.gms.location.LocationRequest; import org.croudtrip.Constants; import org.croudtrip.R; import org.croudtrip.account.AccountManager; import org.croudtrip.api.TripsResource; import org.croudtrip.api.account.User; import org.croudtrip.fragments.ProfileFragment; import org.croudtrip.fragments.SettingsFragment; import org.croudtrip.fragments.join.JoinDispatchFragment; import org.croudtrip.fragments.offer.DispatchOfferTripFragment; import org.croudtrip.gcm.GcmManager; import org.croudtrip.location.LocationUpdater; import org.croudtrip.location.LocationUploadTimerReceiver; import org.croudtrip.utils.CrashCallback; import org.croudtrip.utils.DefaultTransformer; import java.io.InputStream; import java.net.URL; import javax.inject.Inject; import javax.net.ssl.HttpsURLConnection; import it.neokree.materialnavigationdrawer.MaterialNavigationDrawer; import it.neokree.materialnavigationdrawer.elements.MaterialAccount; import it.neokree.materialnavigationdrawer.elements.MaterialSection; import pl.charmas.android.reactivelocation.ReactiveLocationProvider; import rx.Observable; import rx.Subscription; import rx.functions.Action1; import rx.functions.Func0; import rx.subscriptions.CompositeSubscription; import timber.log.Timber; /** * We will probably use fragments, so this activity works as a container for all these fragments and will probably do * some initialization and stuff */ public class MainActivity extends AbstractRoboDrawerActivity { //******************************** Variables ***********************************// // If a notification arrives this sometimes has to change the displayed screen. // These constants are used to determine which screen should be shown. public final static String ACTION_SHOW_JOIN_TRIP_REQUESTS = "SHOW_JOIN_TRIP_REQUESTS"; public final static String ACTION_SHOW_REQUEST_ACCEPTED = "SHOW_REQUEST_ACCEPTED"; public final static String ACTION_SHOW_REQUEST_DECLINED = "SHOW_REQUEST_DECLINED"; public final static String ACTION_SHOW_FOUND_MATCHES = "SHOW_FOUND_MATCHES"; public final static String ACTION_SHOW_JOIN_TRIP_FRAGMENT = "SHOW_JOIN_TRIP_FRAGMENT"; @Inject private GcmManager gcmManager; @Inject private LocationUpdater locationUpdater; @Inject private TripsResource tripsResource; private CompositeSubscription subscriptions = new CompositeSubscription(); private Subscription locationUpdateSubscription; //********************************* Methods ************************************// @Override protected void onNewIntent(Intent intent) { if (intent.getAction() != null && intent.getAction().equals(NfcAdapter.ACTION_TAG_DISCOVERED)) { //user scanned an NFC tag -> notify the passenger driving UI to save new status and maybe update UI Intent startingIntent = new Intent(Constants.EVENT_NFC_TAG_SCANNED); LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(startingIntent); } else { Timber.d("Another Intent or detected some other NFC stuff..."); } } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public void init(Bundle savedInstanceState) { // Configure Navigation Drawer this.disableLearningPattern(); this.allowArrowAnimation(); this.setBackPattern(MaterialNavigationDrawer.BACKPATTERN_BACK_TO_FIRST); this.setDrawerHeaderImage(R.drawable.background_drawer); // Get all the saved user data to display some info in the navigation drawer showUserInfoInNavigationDrawer(); SharedPreferences prefs = getSharedPreferences(Constants.SHARED_PREF_FILE_PREFERENCES, Context.MODE_PRIVATE); // Start timer to update the user's offers all the time if (AccountManager.isUserLoggedIn(this)) { Intent alarmIntent = new Intent(this, LocationUploadTimerReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0); AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); alarmManager.cancel(pendingIntent); alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 120 * 1000, pendingIntent); } // Subscribe to location updates LocationRequest request = LocationRequest.create() //standard GMS LocationRequest .setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY).setInterval(10000); ReactiveLocationProvider locationProvider = new ReactiveLocationProvider(this); Subscription locationUpdateSubscription = locationProvider.getUpdatedLocation(request) .subscribe(new Action1<Location>() { @Override public void call(Location location) { locationUpdater.setLastLocation(location); } }); subscriptions.add(locationUpdateSubscription); // GPS availability if (!GPSavailable()) { checkForGPS(); } // Registration for GCM, if we are not registered yet if (!gcmManager.isRegistered()) { Subscription subscription = gcmManager.register().compose(new DefaultTransformer<Void>()).retry(3) .subscribe(new Action1<Void>() { @Override public void call(Void aVoid) { Timber.d("Registered at GCM."); } }, new CrashCallback(this, "failed to register for GCM")); subscriptions.add(subscription); } fillNavigationDrawer(); } @Override public void onBackPressed() { if (getCurrentSection().getTargetFragment() instanceof JoinDispatchFragment) { JoinDispatchFragment currentFragment = (JoinDispatchFragment) getCurrentSection().getTargetFragment(); if (!currentFragment.allowBackPressed()) { return; } } super.onBackPressed(); } @Override public void onPause() { super.onPause(); subscriptions.unsubscribe(); subscriptions.clear(); } @Override public void onStop() { super.onStop(); } @Override protected void onDestroy() { super.onDestroy(); } @Override public void onActivityResult(int requestCode, int resultCode, Intent intent) { super.onActivityResult(requestCode, resultCode, intent); } private boolean GPSavailable() { LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); } private void checkForGPS() { final SharedPreferences prefs = getSharedPreferences(Constants.SHARED_PREF_FILE_PREFERENCES, Context.MODE_PRIVATE); final SharedPreferences.Editor editor = prefs.edit(); AlertDialog.Builder adb = new AlertDialog.Builder(this); LayoutInflater adbInflater = LayoutInflater.from(this); View dialogLayout = adbInflater.inflate(R.layout.dialog_enable_gps, null); final CheckBox dontShowAgain = (CheckBox) dialogLayout.findViewById(R.id.skip); adb.setView(dialogLayout); adb.setTitle(getResources().getString(R.string.enable_gps_title)); adb.setMessage(getResources().getString(R.string.enable_gps_description)); adb.setPositiveButton(getResources().getString(R.string.enable_gps_ok), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { if (dontShowAgain.isChecked()) { editor.putBoolean(Constants.SHARED_PREF_KEY_SKIP_ENABLE_GPS, true); editor.apply(); } startActivity(new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)); return; } }); adb.setNegativeButton(getResources().getString(R.string.enable_gps_cancel), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { return; } }); adb.show(); } public void showUserInfoInNavigationDrawer() { // Get logged-in user and his data User user = AccountManager.getLoggedInUser(getApplicationContext()); String firstName = (user == null || user.getFirstName() == null) ? "" : user.getFirstName(); String lastName = (user == null || user.getLastName() == null) ? "" : user.getLastName(); String email = (user == null || user.getEmail() == null) ? "" : user.getEmail(); final String avatarUrl = (user == null || user.getAvatarUrl() == null) ? null : user.getAvatarUrl(); Timber.i("Nav drawer avatarUrl is: " + avatarUrl); final MaterialAccount account = new MaterialAccount(this.getResources(), firstName + " " + lastName, email, R.drawable.profile, R.drawable.background_drawer); this.addAccount(account); // Download his avatar if (avatarUrl != null) { Observable.defer(new Func0<Observable<Bitmap>>() { @Override public Observable<Bitmap> call() { try { URL url = new URL(avatarUrl); HttpsURLConnection connection = (HttpsURLConnection) url.openConnection(); connection.setDoInput(true); connection.connect(); InputStream input = connection.getInputStream(); return Observable.just(BitmapFactory.decodeStream(input)); } catch (Exception e) { return Observable.error(e); } } }).compose(new DefaultTransformer<Bitmap>()).subscribe(new Action1<Bitmap>() { @Override public void call(Bitmap avatar) { Timber.d("avatar is null " + (avatar == null)); Timber.d("" + avatar.getWidth()); account.setPhoto(avatar); notifyAccountDataChanged(); } }, new Action1<Throwable>() { @Override public void call(Throwable throwable) { Timber.e(throwable, "failed to download avatar"); } }); } } private void fillNavigationDrawer() { // Check the action that was given to the activity to determine the sections that // should be shown Intent intent = getIntent(); String action = intent.getAction(); action = (action == null) ? "" : action; // (0) JOIN TRIP JoinDispatchFragment joinDispatchFragment = new JoinDispatchFragment(); joinDispatchFragment.setArguments(getIntent().getExtras()); this.addSection( newSection(getString(R.string.menu_join_trip), R.drawable.hitchhiker, joinDispatchFragment)); // (1) OFFER TRIP String offerName = getString(R.string.menu_offer_trip); SharedPreferences prefs = getSharedPreferences(Constants.SHARED_PREF_FILE_PREFERENCES, MODE_PRIVATE); if (prefs.getBoolean(Constants.SHARED_PREF_KEY_RUNNING_TRIP_OFFER, false)) { offerName = getString(R.string.menu_my_trip); } DispatchOfferTripFragment dispatchOfferTripFragment = new DispatchOfferTripFragment(); dispatchOfferTripFragment.setArguments(getIntent().getExtras()); this.addSection(newSection(offerName, R.drawable.ic_directions_car_white, dispatchOfferTripFragment)); // (2) PROFILE if (AccountManager.isUserLoggedIn(this)) { // Only logged-in users can view their profile this.addSection(newSection(getString(R.string.menu_profile), R.drawable.ic_person_black_36dp, new ProfileFragment())); } // (3) SETTINGS this.addBottomSection( newSection(getString(R.string.menu_settings), R.drawable.ic_settings, new SettingsFragment())); // Set the section that should be loaded at the start of the application if (action.equalsIgnoreCase(ACTION_SHOW_REQUEST_DECLINED) || action.equals(ACTION_SHOW_FOUND_MATCHES)) { this.setDefaultSectionLoaded(0); MaterialSection section = this.getSectionByTitle(getString(R.string.menu_my_trip)); Bundle extras = getIntent().getExtras(); Bundle bundle = new Bundle(); bundle.putAll(extras); Fragment requestFrag = (Fragment) section.getTargetFragment(); requestFrag.setArguments(bundle); } else if (action.equalsIgnoreCase(ACTION_SHOW_JOIN_TRIP_REQUESTS)) { this.setDefaultSectionLoaded(1); // Offer trip (My trip) } else if (action.equalsIgnoreCase(ACTION_SHOW_JOIN_TRIP_FRAGMENT)) { this.setDefaultSectionLoaded(0); //Join trip } } }