Java tutorial
/** * Restaurant Roulette for Android * Copyright (C) 2014 Phil Shadlyn * * Restaurant Roulette is free software: you can redistribute it and/or modify * it under the terms of the GNU 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * @copyright 2014 Phil Shadlyn - physphil@gmail.com * @license GNU General Public License - https://www.gnu.org/licenses/gpl.html */ package com.physphil.android.restaurantroulette; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.graphics.Typeface; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.ListFragment; import android.support.v4.content.LocalBroadcastManager; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.ListView; import android.widget.TextView; import com.physphil.android.restaurantroulette.data.DatabaseHelper; import com.physphil.android.restaurantroulette.models.RestaurantHistory; import com.physphil.android.restaurantroulette.ui.RestaurantHistoryListAdapter; import com.physphil.android.restaurantroulette.util.Constants; import com.physphil.android.restaurantroulette.util.Util; import java.util.List; /** * Created by pshadlyn on 3/10/14. */ public class HistoryListFragment extends ListFragment { public static final String ACTION_HISTORY_CLEARED = "com.physphil.android.restaurantroulette.ACTION_HISTORY_CLEARED"; private static final String PREFS_SHOW_HELP_HISTORY = "show_help_history"; private List<RestaurantHistory> mHistory; private DatabaseHelper mDatabaseHelper; private RestaurantHistoryListAdapter mAdapter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); mDatabaseHelper = DatabaseHelper.getInstance(getActivity()); updateHistoryList(); LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(getActivity()); lbm.registerReceiver(mLifetimeReceiver, new IntentFilter(RestaurantFragment.ACTION_RESTAURANT_UPDATED)); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.fragment_history_list, container, false); // Set font for text when listview is empty Typeface tf = Typeface.createFromAsset(getActivity().getAssets(), Constants.FONT_DEFAULT); ((TextView) v.findViewById(android.R.id.empty)).setTypeface(tf); return v; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); getListView().setDivider(null); } @Override public void onResume() { super.onResume(); LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(getActivity()); lbm.registerReceiver(mVisibleReceiver, new IntentFilter(NavigationDrawerFragment.ACTION_DRAWER_CLOSED)); lbm.registerReceiver(mVisibleReceiver, new IntentFilter(ACTION_HISTORY_CLEARED)); } @Override public void onPause() { super.onPause(); LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(mVisibleReceiver); } @Override public void onDestroy() { super.onDestroy(); LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(mLifetimeReceiver); } @Override public void onListItemClick(ListView l, View v, int position, long id) { String restaurantId = mHistory.get(position).getRestaurantId(); startActivity(RestaurantActivity.getLaunchingIntent(getActivity(), restaurantId)); } private void updateHistoryList() { mHistory = mDatabaseHelper.getAllHistory(); mAdapter = new RestaurantHistoryListAdapter(getActivity(), mHistory); setListAdapter(mAdapter); } private void showHelpDialog() { Util.showHelpDialog(getActivity(), R.string.title_restaurant_history, R.string.dialog_restaurant_history_help, PREFS_SHOW_HELP_HISTORY); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_help: showHelpDialog(); return true; default: return super.onOptionsItemSelected(item); } } private BroadcastReceiver mLifetimeReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(RestaurantFragment.ACTION_RESTAURANT_UPDATED)) { // Refresh history list to capture updated info updateHistoryList(); } } }; private BroadcastReceiver mVisibleReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(ACTION_HISTORY_CLEARED)) { // Refresh adapter as history data has been cleared mHistory.clear(); mAdapter.notifyDataSetChanged(); } else if (intent.getAction().equals(NavigationDrawerFragment.ACTION_DRAWER_CLOSED)) { // Show help dialog if never been shown before final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity()); boolean showHelp = prefs.getBoolean(PREFS_SHOW_HELP_HISTORY, true); if (showHelp) { showHelpDialog(); } } } }; }