Android activity class for maintenance

Question

I have my activity below where ShoutCastURL streaming is played using Some Helper Classess

code:

import java.net.MalformedURLException; import com.androidworkz.androidshoutcastlib.AndroidShoutcastLib; import com.androidworkz.androidshoutcastlib.InvalidStreamURLException; import com.androidworkz.androidshoutcastlib.Metadata; import com.androidworkz.androidshoutcastlib.MetadataListener; import android.media.AudioManager; import android.media.MediaPlayer; import android.media.MediaPlayer.OnBufferingUpdateListener; import android.media.MediaPlayer.OnCompletionListener; import android.media.MediaPlayer.OnErrorListener; import android.media.MediaPlayer.OnPreparedListener; import android.os.Bundle; import android.os.Handler; import android.os.PowerManager; import android.app.Activity; import android.util.Log; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class Player extends Activity implements OnCompletionListener, OnPreparedListener, OnErrorListener, OnBufferingUpdateListener, MusicFocusable { private Boolean playState = false; private String station = "http://38.101.195.5:9156"; public static final float DUCK_VOLUME = 0.1f; private String artistName = null; private String trackName = null; private TextView artist; private TextView track; private TextView status; private Button play; enum AudioFocus { NoFocusNoDuck, // we don't have audio focus, and can't duck NoFocusCanDuck, // we don't have focus, but can play at a low volume // ("ducking") Focused // we have full audio focus } private AudioFocus mAudioFocus = AudioFocus.NoFocusNoDuck; private MediaPlayer mPlayer = null; private AndroidShoutcastLib shoutcast; private AudioManager mAudioManager; AudioFocusHelper mAudioFocusHelper = null; Handler handler = new Handler(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_player); mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE); // create the Audio Focus Helper, if the Audio Focus feature is // available (SDK 8 or above) if (android.os.Build.VERSION.SDK_INT >= 8) { mAudioFocusHelper = new AudioFocusHelper(getApplicationContext(), this); } else { mAudioFocus = AudioFocus.Focused; // no focus feature, so we always "have" audio focus } status = (TextView) findViewById(R.id.status); artist = (TextView) findViewById(R.id.artist); artist.setSelected(true); track = (TextView) findViewById(R.id.track); track.setSelected(true); play = (Button) findViewById(R.id.play); play.setOnClickListener(new OnClickListener() { @Override public void onClick(View btn) { if (!playState) { play.setText("Pause"); handler.postDelayed(handlePlayRequest, 300); } else { play.setText("Play"); status.setText("Press Play"); handler.postDelayed(handlePlayRequest, 300); } } }); shoutcast = new AndroidShoutcastLib(); try { shoutcast.setShoutcastUrl(station); } catch (InvalidStreamURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } shoutcast.setOnMetadataChangedListener(new MetadataListener(){ @Override public void OnMetadataChanged(Metadata item) { artistName = item.artist; trackName = item.track; updateMeta(); } }); setVolumeControlStream(AudioManager.STREAM_MUSIC); } public void onDestroy() { super.onDestroy(); shoutcast = null; handler.removeCallbacks(handlePlayRequest); } public void updateMeta() { handler.post(new Runnable() { @Override public void run() { // This gets executed on the UI thread so it can safely modify Views artist.setText(artistName); track.setText(trackName); } }); } private final Runnable handlePlayRequest = new Runnable() { public void run() { if (playState) { Log.d("Player", "Stop Called"); giveUpAudioFocus(); mPlayer.stop(); mPlayer.reset(); mPlayer.release(); shoutcast.stopStream(); mPlayer = null; playState = false; } else { Log.d("Player", "Play Called"); createMediaPlayer(); getAudioFocus(); try { mPlayer.setDataSource(shoutcast.startStream()); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvalidStreamURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } mPlayer.prepareAsync(); } } }; private void createMediaPlayer() { mPlayer = new MediaPlayer(); // Make sure the media player will acquire a wake-lock while // playing. If we don't do // that, the CPU might go to sleep while the song is playing, // causing playback to stop. // // Remember that to use this, we have to declare the // android.permission.WAKE_LOCK // permission in AndroidManifest.xml. mPlayer.setWakeMode(getApplicationContext(), PowerManager.PARTIAL_WAKE_LOCK); // we want the media player to notify us when it ready preparing, // and when it done // playing: mPlayer.setOnPreparedListener(this); mPlayer.setOnCompletionListener(this); mPlayer.setOnErrorListener(this); } private void startPlayer() { mPlayer.setVolume(1.0f, 1.0f); if (!mPlayer.isPlaying()) { Log.d("Player", "Starting Playback"); mPlayer.start(); playState = true; status.setText("Streaming"); } } private void getAudioFocus() { if (mAudioFocus != AudioFocus.Focused && mAudioFocusHelper != null && mAudioFocusHelper.requestFocus()) mAudioFocus = AudioFocus.Focused; } private void giveUpAudioFocus() { if (mAudioFocus == AudioFocus.Focused && mAudioFocusHelper != null && mAudioFocusHelper.abandonFocus()) mAudioFocus = AudioFocus.NoFocusNoDuck; } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_player, menu); return true; } @Override public void onBufferingUpdate(MediaPlayer arg0, int arg1) { // TODO Auto-generated method stub } @Override public boolean onError(MediaPlayer mp, int what, int extra) { playState = false; handler.post(handlePlayRequest); return false; } @Override public void onPrepared(MediaPlayer arg0) { startPlayer(); } @Override public void onCompletion(MediaPlayer arg0) { // TODO Auto-generated method stub } @Override public void onGainedAudioFocus() { // TODO Auto-generated method stub } @Override public void onLostAudioFocus(boolean canDuck) { // TODO Auto-generated method stub } } 

Above code works great, when I played Stream on ForeGround,

But my requirements are to play the stream in the background (my code should play the stream if the user interacts with other applications as well)

To do this, I created a class of service for the above action

Here is the code:

Activity:

 import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class Player extends Activity implements OnClickListener { private Boolean playState = false; public static final float DUCK_VOLUME = 0.1f; private String artistName = null; private String trackName = null; private TextView artist; private TextView track; private TextView status; private Button play; Intent playbackServiceIntent; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_player); // create the Audio Focus Helper, if the Audio Focus feature is // available (SDK 8 or above) status = (TextView) findViewById(R.id.status); artist = (TextView) findViewById(R.id.artist); artist.setSelected(true); track = (TextView) findViewById(R.id.track); track.setSelected(true); play = (Button) findViewById(R.id.play); play.setOnClickListener(this); playbackServiceIntent = new Intent(this, BackGroundService.class); } @Override public void onClick(View v) { if (v == play) { startService(playbackServiceIntent); Log.d("hi>>>>>", "gjgj"); finish(); } } } 

Class of service:

 import com.androidworkz.androidshoutcastlib.AndroidShoutcastLib; import com.androidworkz.androidshoutcastlib.InvalidStreamURLException; import android.app.Service; import android.content.Intent; import android.media.AudioManager; import android.media.MediaPlayer; import android.media.MediaPlayer.OnBufferingUpdateListener; import android.media.MediaPlayer.OnCompletionListener; import android.media.MediaPlayer.OnErrorListener; import android.media.MediaPlayer.OnPreparedListener; import android.os.AsyncTask; import android.os.Handler; import android.os.IBinder; import android.os.PowerManager; import android.util.Log; public class BackGroundService extends Service implements OnCompletionListener, OnPreparedListener, OnErrorListener, OnBufferingUpdateListener, MusicFocusable { private Boolean playState = false; private String station = "http://38.101.195.5:9156"; public static final float DUCK_VOLUME = 0.1f; Runnable handlePlayRequest; enum AudioFocus { NoFocusNoDuck, // we don't have audio focus, and can't duck NoFocusCanDuck, // we don't have focus, but can play at a low volume // ("ducking") Focused // we have full audio focus } private AudioFocus mAudioFocus = AudioFocus.NoFocusNoDuck; private MediaPlayer mPlayer = null; private AndroidShoutcastLib shoutcast; private AudioManager mAudioManager; AudioFocusHelper mAudioFocusHelper = null; Handler handler = new Handler(); @Override public IBinder onBind(Intent arg0) { // TODO Auto-generated method stub return null; } @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.d("onStartCommand>>>", "onStartCommand"); mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE); // create the Audio Focus Helper, if the Audio Focus feature is // available (SDK 8 or above) if (android.os.Build.VERSION.SDK_INT >= 8) { mAudioFocusHelper = new AudioFocusHelper(getApplicationContext(), this); } else { mAudioFocus = AudioFocus.Focused; // no focus feature, so we always // "have" audio focus } shoutcast = new AndroidShoutcastLib(); try { Log.d("Station>>>", station); shoutcast.setShoutcastUrl(station); } catch (InvalidStreamURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } new BackgroundSound().execute(); return START_STICKY; } public void onDestroy() { Log.d("onDestroy>>>", "onDestroy"); if (mPlayer.isPlaying()) { mPlayer.stop(); } mPlayer.release(); } @Override public void onGainedAudioFocus() { // TODO Auto-generated method stub } @Override public void onLostAudioFocus(boolean canDuck) { // TODO Auto-generated method stub } @Override public void onBufferingUpdate(MediaPlayer arg0, int arg1) { // TODO Auto-generated method stub } @Override public boolean onError(MediaPlayer arg0, int arg1, int arg2) { // TODO Auto-generated method stub return false; } @Override public void onPrepared(MediaPlayer arg0) { // TODO Auto-generated method stub mPlayer.start(); } private void giveUpAudioFocus() { if (mAudioFocus == AudioFocus.Focused && mAudioFocusHelper != null && mAudioFocusHelper.abandonFocus()) mAudioFocus = AudioFocus.NoFocusNoDuck; } @Override public void onCompletion(MediaPlayer arg0) { // TODO Auto-generated method stub stopSelf(); } private void getAudioFocus() { if (mAudioFocus != AudioFocus.Focused && mAudioFocusHelper != null && mAudioFocusHelper.requestFocus()) mAudioFocus = AudioFocus.Focused; } private void createMediaPlayer() { mPlayer = new MediaPlayer(); // Make sure the media player will acquire a wake-lock while // playing. If we don't do // that, the CPU might go to sleep while the song is playing, // causing playback to stop. // // Remember that to use this, we have to declare the // android.permission.WAKE_LOCK // permission in AndroidManifest.xml. mPlayer.setWakeMode(getApplicationContext(), PowerManager.PARTIAL_WAKE_LOCK); // we want the media player to notify us when it ready preparing, // and when it done // playing: mPlayer.setOnPreparedListener(this); mPlayer.setOnCompletionListener(this); mPlayer.setOnErrorListener(this); } private class BackgroundSound extends AsyncTask<Void, Void, Void> { @Override protected Void doInBackground(Void... params) { Log.d("doInBackground>>>", "doInBackground"); Log.d("run>>>", "run"); if (playState) { Log.d("Player", "Stop Called"); giveUpAudioFocus(); mPlayer.stop(); mPlayer.reset(); mPlayer.release(); shoutcast.stopStream(); mPlayer = null; playState = false; } else { Log.d("Player", "Play Called"); createMediaPlayer(); getAudioFocus(); try { mPlayer.setDataSource(shoutcast.startStream()); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvalidStreamURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } mPlayer.prepareAsync(); } return null; } } } 

When I execute on a service class, I can play Stream, but My Layout disappears when control passes to Service Class

One thing I want to know is my conversion from action to service is correct or not?

Can someone suggest me the correct code?

Answer 1

If you want to play only background music only for your application, then play it in the stream launched from your application / use the AsyncTask class to do this for you.

The concept of services is to run in the background; At its discretion, the value usually occurs when the user interface of the application is NOT visible . True, it can be used in the same way as yours (if you stop it), but it is simply not correct, and it consumes resources that you should not use.

If you want to display tasks against the background of your activity, use AsyncTask.

By the way, onStart is deprecated. When you use services, implement onStartCommand.

UPDATE:

I think this code will work for you. Add this class (included in your activity class).

  public class BackgroundSound extends AsyncTask<Void, Void, Void> { @Override protected Void doInBackground(Void... params) { MediaPlayer player = MediaPlayer.create(YourActivity.this, R.raw.test_cbr); player.setLooping(true); // Set looping player.setVolume(100,100); player.start(); return null; } } 

Now, to control the music, save the BackgroundSound object rather than create it anonymously. Declare it as a field in your activity:

  BackgroundSound mBackgroundSound = new BackgroundSound(); 

In your activity onResume method, run it:

  public void onResume() { super.onResume(); mBackgroundSound.execute(null); } 

And in your activity onPause method, stop it:

  public void onPause() { super.onPause(); mBackgroundSound.cancel(true); } 

This will work.