Java tutorial
/* * CurrencyBG App * Copyright (C) 2016 Vexelon.NET Services * * 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 net.vexelon.currencybg.app.ui.activities; import java.util.Calendar; import android.app.AlarmManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.content.res.Configuration; import android.os.Bundle; import android.preference.PreferenceFragment; import android.preference.PreferenceManager; import android.support.design.widget.NavigationView; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.preference.PreferenceFragmentCompat; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import net.vexelon.currencybg.app.Defs; import net.vexelon.currencybg.app.R; import net.vexelon.currencybg.app.services.RateService; import net.vexelon.currencybg.app.ui.events.Notifications; import net.vexelon.currencybg.app.ui.events.NotificationsListener; import net.vexelon.currencybg.app.ui.fragments.AbstractFragment; import net.vexelon.currencybg.app.ui.fragments.ConvertFragment; import net.vexelon.currencybg.app.ui.fragments.CurrenciesFragment; import net.vexelon.currencybg.app.ui.fragments.InfoFragment; import net.vexelon.currencybg.app.ui.fragments.PrefsFragment; public class MainActivity extends AppCompatActivity implements NotificationsListener { private DrawerLayout drawerLayout; private ActionBarDrawerToggle drawerToggle; private Toolbar toolbar; private PendingIntent pendingIntent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); NavigationView drawerNav = (NavigationView) findViewById(R.id.navView); setupDrawerContent(drawerNav); drawerToggle = setupDrawerToggle(); // load default values PreferenceManager.setDefaultValues(this, R.xml.preferences, false); // Start Service //TODO - temporary commented // startService(); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); drawerToggle.syncState(); if (savedInstanceState == null) { try { showFragment(CurrenciesFragment.class); } catch (Exception e) { e.printStackTrace(); } } } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); drawerToggle.onConfigurationChanged(newConfig); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (drawerToggle.onOptionsItemSelected(item)) { return true; } switch (item.getItemId()) { case android.R.id.home: drawerLayout.openDrawer(GravityCompat.START); break; } return super.onOptionsItemSelected(item); } private ActionBarDrawerToggle setupDrawerToggle() { return new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close); } private void setupDrawerContent(NavigationView navigationView) { final Context context = this; navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { @Override public boolean onNavigationItemSelected(MenuItem menuItem) { if (menuItem.getItemId() == R.id.nav_settings) { // special case -> settings PreferenceFragmentCompat fragment = new PrefsFragment(); FragmentManager fragmentManager = getSupportFragmentManager(); fragmentManager.beginTransaction().replace(R.id.frame_layout, fragment).commit(); menuItem.setChecked(true); setTitle(menuItem.getTitle()); drawerLayout.closeDrawers(); } else { selectDrawerItem(menuItem, getClassFromMenu(menuItem)); } return true; } }); } private Class getClassFromMenu(MenuItem menuItem) { switch (menuItem.getItemId()) { case R.id.nav_convert: return ConvertFragment.class; case R.id.nav_info: return InfoFragment.class; case R.id.nav_settings: return PrefsFragment.class; case R.id.nav_currencies: default: return CurrenciesFragment.class; } } /** * Create a new fragment and specify the planet to show based on position. * * @param menuItem * @param clazz */ private <T extends AbstractFragment> void selectDrawerItem(MenuItem menuItem, Class<T> clazz) { try { showFragment(clazz); // Highlight the selected item, update the title, and close the // drawer menuItem.setChecked(true); setTitle(menuItem.getTitle()); drawerLayout.closeDrawers(); } catch (Exception e) { Log.e(Defs.LOG_TAG, "Unknown drawer section!", e); } } private <T extends AbstractFragment> AbstractFragment showFragment(Class<T> clazz) throws Exception { AbstractFragment fragment = clazz.newInstance(); // fragment.addListener(MainActivity.this); // Bundle args = new Bundle(); // args.putInt(ARG_SECTION_NUMBER, sectionNumber); // fragment.setArguments(args); // Insert the fragment by replacing any existing fragment FragmentManager fragmentManager = getSupportFragmentManager(); fragmentManager.beginTransaction().replace(R.id.frame_layout, fragment).commit(); return fragment; } @Override public void onNotification(Notifications event) { switch (event) { case UPDATE_RATES_DONE: // setRefreshActionButtonState(false); break; } } /** * Starts background currencies update service */ public void startService() { Intent myIntent = new Intent(MainActivity.this, RateService.class); pendingIntent = PendingIntent.getService(MainActivity.this, 0, myIntent, 0); AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(System.currentTimeMillis()); calendar.add(Calendar.SECOND, 30); long initialStartTimeout = calendar.getTimeInMillis(); alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, initialStartTimeout, Defs.NOTIFY_INTERVAL, pendingIntent); } public void cancelService() { AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); alarmManager.cancel(pendingIntent); } }