Java tutorial
/* * Copyright (C) 2013 The OmniROM Project * * 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 org.omni.roadrunner; import android.app.ActionBar; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.os.Bundle; import android.support.v4.widget.DrawerLayout; import android.view.Menu; import android.view.MenuItem; public class MainActivity extends Activity implements NavigationDrawerFragment.NavigationDrawerCallbacks { private Fragment mBodyFragment; /** * Fragment managing the behaviors, interactions and presentation of the navigation drawer. */ private NavigationDrawerFragment mNavigationDrawerFragment; /** * Used to store the last screen title. For use in {@link #restoreActionBar()}. */ private CharSequence mTitle; private String[] mSections = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mNavigationDrawerFragment = (NavigationDrawerFragment) getFragmentManager() .findFragmentById(R.id.navigation_drawer); mSections = getResources().getStringArray(R.array.nav_drawer_items); mTitle = getTitle(); // Set up the drawer. mNavigationDrawerFragment.setUp(R.id.navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout)); } @Override public void onNavigationDrawerItemSelected(int position) { switch (position) { case 0: mBodyFragment = StatisticsFragment.newInstance(null, null); break; case 1: mBodyFragment = PowerProfileFragment.newInstance(); break; case 2: mBodyFragment = WakelocksFragment.newInstance(); break; case 3: mBodyFragment = AlarmsFragment.newInstance(); break; default: throw new RuntimeException("Unknown sidebar element!"); } // update the main content by replacing fragments FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.container, mBodyFragment).commit(); // update title if (mSections != null) { mTitle = mSections[position]; } } public void restoreActionBar() { ActionBar actionBar = getActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); actionBar.setDisplayShowTitleEnabled(true); actionBar.setTitle(mTitle); } @Override public boolean onCreateOptionsMenu(Menu menu) { if (!mNavigationDrawerFragment.isDrawerOpen()) { // Only show items in the action bar relevant to this screen // if the drawer is not showing. Otherwise, let the drawer // decide what to show in the action bar. mBodyFragment.onCreateOptionsMenu(menu, getMenuInflater()); restoreActionBar(); return true; } return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button. // We first make it go through our body fragment actions if (mBodyFragment != null) { if (mBodyFragment.onOptionsItemSelected(item)) { return true; } } switch (item.getItemId()) { case R.id.action_settings: return true; } return super.onOptionsItemSelected(item); } }