Java tutorial
/* * Lembretes. This software is intended for students from UNICAMP as a simple reminder of the daily meal. * Copyright (C) 2013-2017 Edson Duarte (edsonduarte1990@gmail.com) * * This program 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/>. */ package com.lostrealm.lembretes; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.content.LocalBroadcastManager; import android.view.Menu; import android.view.MenuItem; import android.widget.TextView; import java.text.SimpleDateFormat; import java.util.Date; import butterknife.BindView; import butterknife.ButterKnife; public final class MealActivity extends Activity { @BindView(R.id.mealView) TextView mealTV; @BindView(R.id.updateView) TextView updateTV; private Meal meal; private BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { meal = MealManager.instance().getMeal(context); mealTV.setText(meal.getDescriptionFull()); updateTV.setText(SimpleDateFormat.getDateTimeInstance().format(new Date(PreferenceManager .getDefaultSharedPreferences(context).getLong(getString(R.string.pref_last_update_key), 0)))); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_meal); ButterKnife.bind(this); PreferenceManager.setDefaultValues(this, R.xml.preferences, false); DownloadJob.scheduleExact(); NotificationJob.scheduleExact(); } @Override protected void onResume() { super.onResume(); LocalBroadcastManager.getInstance(this).registerReceiver(receiver, new IntentFilter(MainIntentService.ACTION_REFRESH)); } @Override protected void onPause() { super.onPause(); LocalBroadcastManager.getInstance(this).unregisterReceiver(receiver); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.action_refresh: DownloadJob.scheduleExact(); return true; case R.id.action_settings: startActivity(new Intent(this, SettingsActivity.class)); return true; case R.id.action_about: startActivity(new Intent(this, AboutActivity.class)); return true; } return super.onOptionsItemSelected(item); } }