Java tutorial
/* * Copyright 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package io.radio.streamer; import java.security.KeyStore; import java.util.Locale; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.app.SearchManager; import android.content.Intent; import android.content.res.Configuration; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.Toast; import android.annotation.TargetApi; import android.app.PendingIntent; import android.content.ComponentName; import android.content.Context; import android.content.ServiceConnection; import android.content.SharedPreferences; import android.gesture.GestureOverlayView; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.media.AudioManager; import android.media.AudioManager.OnAudioFocusChangeListener; import android.media.MediaMetadataRetriever; import android.media.RemoteControlClient; import android.media.RemoteControlClient.MetadataEditor; import android.os.AsyncTask; import android.os.Build; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.preference.PreferenceManager; import android.text.Html; import android.util.Log; import android.widget.ImageButton; import android.widget.ProgressBar; import android.widget.ScrollView; import android.widget.TextView; import android.widget.ViewFlipper; import org.apache.http.Header; import org.json.JSONException; import org.json.JSONObject; import javax.net.ssl.SSLPeerUnverifiedException; import io.radio.streamer.api.API; import io.radio.streamer.api.Packet; import io.radio.streamer.api.Util; import io.radio.streamer.views.FXView; import io.radio.streamer.services.RadioService; import io.radio.streamer.services.RemoteControlReceiver; public class MainActivity extends Activity { private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mDrawerMenu; public static String PREFS_FILENAME = "RADIOPREFS"; RadioService service; private static Packet packet; private TextView title; private TextView artist; private TextView dj; private ProgressBar songProgressBar; private Timer progressTimer; private Timer apiTimer; private ImageView djImage; private TextView listeners; private TextView songLength; private static int progress; private static int length; private ImageButton playButton; private ImageButton shareButton; private ImageButton searchButton; private ImageButton faveButton; private ViewFlipper viewFlipper; private GestureOverlayView gestureOverlay; private ScrollView queueScroll; private ScrollView lpScroll; private FXView fxView; private AudioManager audioManager; private RemoteControlClient remoteControlClient; private int lastDj; final Messenger mMessenger = new Messenger(new IncomingHandler()); OnAudioFocusChangeListener afChangeListener = new OnAudioFocusChangeListener() { public void onAudioFocusChange(int focusChange) { if (focusChange == AudioManager.AUDIOFOCUS_LOSS) { audioManager.abandonAudioFocus(afChangeListener); service.stopPlayer(); } } }; class IncomingHandler extends Handler { @Override public void handleMessage(Message msg) { if (msg.what == Util.NPUPDATE) { // ignore } if (msg.what == Util.PROGRESSUPDATE) { updateProgress(); } if (msg.what == Util.MUSICSTART) { audioManager.requestAudioFocus(afChangeListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN); updatePlayButton(); SharedPreferences sharedPref = PreferenceManager .getDefaultSharedPreferences(getApplicationContext()); // FxView boolean dBGraph = sharedPref.getBoolean("dBGraphEnabled", false); boolean wavVis = sharedPref.getBoolean("waveVisEnabled", false); if (dBGraph || wavVis) fxView.startFx(service.getAudioStreamId(), dBGraph, wavVis); } if (msg.what == Util.MUSICSTOP) { updatePlayButton(); audioManager.abandonAudioFocus(afChangeListener); fxView.stopFx(); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Allow keys to change volume without playing setVolumeControlStream(AudioManager.STREAM_MUSIC); audioManager = (AudioManager) getApplicationContext().getSystemService(Context.AUDIO_SERVICE); // Initialize Remote Controls if SDK Version >=14 initializeRemoteControls(); initializeVariables(); initializeSideBar(); updateApiData(); // first page in the menu (homepage) on first load if (savedInstanceState == null) { selectItem(0); } // Get the fxView fxView = (FXView) findViewById(R.id.audioFxView); apiTimer = new Timer(); apiTimer.scheduleAtFixedRate(new TimerTask() { @Override public void run() { try { updateApiData(); } catch (Exception e) { Log.e("api", "exception", e); } } }, 0, 10000); progressTimer = new Timer(); progressTimer.scheduleAtFixedRate(new TimerTask() { @Override public void run() { try { Message m = new Message(); m.what = Util.PROGRESSUPDATE; mMessenger.send(m); } catch (Exception e) { Log.e("api", "exception", e); } } }, 0, 1000); } protected void updateProgress() { if (this.songProgressBar == null) { return; } this.progress++; this.songProgressBar.setProgress(this.progress); this.songLength.setText(Util.formatSongLength(this.progress, this.length)); } public void setPacket(Packet mPacket) { ((ProgressBar) findViewById(R.id.main_SongProgress)).setMax(mPacket.main.length); ((ProgressBar) findViewById(R.id.main_SongProgress)).setProgress(mPacket.main.progress); progress = mPacket.main.progress; length = mPacket.main.length; packet = mPacket; } private void updateApiData() { API api = new API("/", this); } private void initializeVariables() { // Find and get all the layout items title = (TextView) findViewById(R.id.main_SongName); artist = (TextView) findViewById(R.id.main_ArtistName); dj = (TextView) findViewById(R.id.main_DjName); djImage = (ImageView) findViewById(R.id.main_DjImage); songProgressBar = (ProgressBar) findViewById(R.id.main_SongProgress); listeners = (TextView) findViewById(R.id.main_ListenerCount); songLength = (TextView) findViewById(R.id.main_SongLength); playButton = (ImageButton) findViewById(R.id.player_play); } private void initializeSideBar() { // MenuBar mTitle = mDrawerTitle = getTitle(); mDrawerMenu = getResources().getStringArray(R.array.app_menu); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); // set a custom shadow that overlays the main content when the drawer opens mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); // set up the drawer's list view with items and click listener mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, mDrawerMenu)); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); // enable ActionBar app icon to behave as action to toggle nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); // ActionBarDrawerToggle ties together the the proper interactions // between the sliding drawer and the action bar app icon mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */ mDrawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ) { public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; mDrawerLayout.setDrawerListener(mDrawerToggle); } @TargetApi(14) private void initializeRemoteControls() { if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) { ComponentName eventReceiver = new ComponentName(getPackageName(), RemoteControlReceiver.class.getName()); audioManager.registerMediaButtonEventReceiver(eventReceiver); Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON); mediaButtonIntent.setComponent(eventReceiver); PendingIntent mediaPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, mediaButtonIntent, 0); remoteControlClient = new RemoteControlClient(mediaPendingIntent); remoteControlClient.setPlaybackState(RemoteControlClient.PLAYSTATE_STOPPED); remoteControlClient.setTransportControlFlags(RemoteControlClient.FLAG_KEY_MEDIA_PLAY | RemoteControlClient.FLAG_KEY_MEDIA_STOP | RemoteControlClient.FLAG_KEY_MEDIA_PLAY_PAUSE); audioManager.registerRemoteControlClient(remoteControlClient); } } @Override public void onDestroy() { super.onDestroy(); apiTimer.cancel(); progressTimer.cancel(); } private void updatePlayButton() { if (RadioService.currentlyPlaying) { playButton.setImageResource(R.drawable.av_stop); } else { playButton.setImageResource(R.drawable.av_play); } } @TargetApi(14) public void updateRemoteMetadata(String artist, String track) { if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) { MetadataEditor metaEditor = remoteControlClient.editMetadata(true); metaEditor.putString(MediaMetadataRetriever.METADATA_KEY_TITLE, track); metaEditor.putString(MediaMetadataRetriever.METADATA_KEY_ARTIST, artist); metaEditor.apply(); } Intent avrcp = new Intent("com.android.music.metachanged"); avrcp.putExtra("track", track); avrcp.putExtra("artist", artist); // avrcp.putExtra("album", "album name"); this.getApplicationContext().sendBroadcast(avrcp); } private void updateNP(Packet packet) { updateRemoteMetadata(Html.fromHtml(packet.main.artist).toString(), Html.fromHtml(packet.main.title).toString()); progress = packet.main.progress; length = packet.main.length; title.setText(Html.fromHtml(packet.main.title)); artist.setText(Html.fromHtml(packet.main.artist)); dj.setText(Html.fromHtml(packet.main.dj.name)); songProgressBar.setMax(length); songProgressBar.setProgress(progress); if (lastDj != packet.main.dj.id) { lastDj = packet.main.dj.id; DJImageLoader imageLoader = new DJImageLoader(); imageLoader.execute(packet); } listeners.setText("Listeners: " + packet.main.listeners); songLength.setText(Util.formatSongLength(progress, length)); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main, menu); return super.onCreateOptionsMenu(menu); } /* Called whenever we call invalidateOptionsMenu() */ @Override public boolean onPrepareOptionsMenu(Menu menu) { // If the nav drawer is open, hide action items related to the content view boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); menu.findItem(R.id.action_search).setVisible(!drawerOpen); return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // The action bar home/up action should open or close the drawer. // ActionBarDrawerToggle will take care of this. if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } // Handle action buttons switch (item.getItemId()) { case R.id.action_search: // create intent to search Intent intent = new Intent(Intent.ACTION_SEARCH); // catch event that there's no activity to handle intent if (intent.resolveActivity(getPackageManager()) != null) { startActivity(intent); } else { Toast.makeText(this, R.string.search_not_available, Toast.LENGTH_LONG).show(); } return true; default: return super.onOptionsItemSelected(item); } } /* The click listener for ListView in the navigation drawer */ private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { selectItem(position); } } private void selectItem(int position) { // update the main content by replacing fragments Fragment fragment = new MenuFragment(); Bundle args = new Bundle(); args.putString(MenuFragment.ARG_PAGE_ID, mDrawerMenu[position]); fragment.setArguments(args); FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); // update selected item and title, then close the drawer mDrawerList.setItemChecked(position, true); setTitle(mDrawerMenu[position]); mDrawerLayout.closeDrawer(mDrawerList); } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); } /** * When using the ActionBarDrawerToggle, you must call it during * onPostCreate() and onConfigurationChanged()... */ @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggls mDrawerToggle.onConfigurationChanged(newConfig); } /** * Fragment that appears in the "content_frame", shows a planet */ public static class MenuFragment extends Fragment { public static final String ARG_PAGE_ID = "page_id"; public MenuFragment() { // Empty constructor required for fragment subclasses } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.radio_homepage, container, false); return rootView; } } private class DJImageLoader extends AsyncTask<Packet, Void, Void> { private Bitmap image; @Override protected Void doInBackground(Packet... params) { Packet pack = params[0]; URL url; try { url = new URL(getString(R.string.api_root) + String.format(getString(R.string.api_dj_image), pack.main.dj.id)); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setDoInput(true); conn.connect(); InputStream is = conn.getInputStream(); image = BitmapFactory.decodeStream(is); } catch (Exception e) { e.printStackTrace(); image = null; } return null; } @Override protected void onPostExecute(Void result) { if (image != null) { djImage.setImageBitmap(image); service.updateNotificationImage(image); } } } }