Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2014 Niko Fink * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package de.ncoder.sensorsystem.android.app; import android.app.*; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.Bundle; import android.os.IBinder; import android.support.annotation.Nullable; import android.support.v13.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import de.ncoder.sensorsystem.Component; import de.ncoder.sensorsystem.Container; import de.ncoder.sensorsystem.android.app.fragment.ComponentsFragment; import de.ncoder.sensorsystem.android.app.fragment.EventLogFragment; import de.ncoder.sensorsystem.android.app.fragment.PlaceholderFragment; import de.ncoder.sensorsystem.android.app.fragment.SensorsFragment; import de.ncoder.typedmap.Key; import java.util.Locale; public class MainActivity extends Activity implements ActionBar.TabListener { private static final String TAG = MainActivity.class.getName(); private Intent serviceIntent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); onCreateTabs(); serviceIntent = new Intent(this, SensorSystemService.class); startService(serviceIntent); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_stop) { if (container != null) { container.shutdown(); container = null; } return true; } else if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } // CONTAINER -------------------------------------------------------------- @Nullable private Container container; @Nullable protected Container getContainer() { return container; } @Nullable protected <T extends Component> T getComponent(Key<T> key) { if (getContainer() != null) { return getContainer().get(key); } else { return null; } } // SERVICE ---------------------------------------------------------------- private boolean bound = false; private final ServiceConnection connection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { Log.i(TAG, "SensorSystem Service connected"); container = (Container) service; } @Override public void onServiceDisconnected(ComponentName name) { Log.i(TAG, "SensorSystem Service disconnected"); container = null; bound = false; } }; @Override public void onResume() { super.onResume(); Intent service = new Intent(this, SensorSystemService.class); if (bindService(service, connection, Context.BIND_ABOVE_CLIENT)) { bound = true; } else { Log.w(TAG, "SensorSystem Service bind failed"); } } @Override public void onPause() { if (bound) { unbindService(connection); bound = false; } super.onPause(); } // TABS ------------------------------------------------------------------- /** * The {@link android.support.v4.view.PagerAdapter} that will provide * fragments for each of the sections. We use a * {@link FragmentPagerAdapter} derivative, which will keep every * loaded fragment in memory. If this becomes too memory intensive, it * may be best to switch to a * {@link android.support.v4.app.FragmentStatePagerAdapter}. */ SectionsPagerAdapter mSectionsPagerAdapter; /** * The {@link ViewPager} that will host the section contents. */ ViewPager mViewPager; private void onCreateTabs() { // Set up the action bar. final ActionBar actionBar = getActionBar(); if (actionBar == null) { return; } actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Create the adapter that will return tab fragments mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager()); // Set up the ViewPager with the sections adapter. mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter); mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { actionBar.setSelectedNavigationItem(position); } }); for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) { actionBar .addTab(actionBar.newTab().setText(mSectionsPagerAdapter.getPageTitle(i)).setTabListener(this)); } } @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } public class SectionsPagerAdapter extends FragmentPagerAdapter { public SectionsPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { switch (position) { case 0: return ComponentsFragment.newInstance(); case 1: return SensorsFragment.newInstance(); case 2: return EventLogFragment.newInstance(); default: return PlaceholderFragment.newInstance(position, getPageTitle(position)); } } @Override public int getCount() { return 3; } @Override public CharSequence getPageTitle(int position) { Locale l = Locale.getDefault(); switch (position) { case 0: return getString(R.string.title_components).toUpperCase(l); case 1: return getString(R.string.title_sensors).toUpperCase(l); case 2: return getString(R.string.title_event_log).toUpperCase(l); } return null; } } }