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POAttempt to call getDuration without a valid mediaplayer in android
 

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  1. POAttempt to call getDuration without a valid mediaplayer in android
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    <p>There are mainly two classes. One is service class and another is activity. This is my service class and I want to know what mistake I have made... It says that calling get duration without valid media player... And I am managing media player from other class </p> <pre><code>public class MediaPlayerService extends Service implements OnBufferingUpdateListener, OnInfoListener, OnPreparedListener, OnErrorListener { private static StatefulMediaPlayer mMediaPlayer = new StatefulMediaPlayer(); private final Binder mBinder = new MediaPlayerBinder(); private IMediaPlayerServiceClient mClient; /** * A class for clients binding to this service. The client will be passed an object of this class * via its onServiceConnected(ComponentName, IBinder) callback. */ public class MediaPlayerBinder extends Binder { /** * Returns the instance of this service for a client to make method calls on it. * @return the instance of this service. */ public MediaPlayerService getService() { return MediaPlayerService.this; } } /** * Returns the contained StatefulMediaPlayer * @return */ public StatefulMediaPlayer getMediaPlayer() { return mMediaPlayer; } /** * Initializes a StatefulMediaPlayer for streaming playback of the provided StreamStation * @param station The StreamStation representing the station to play */ public void initializePlayer(StreamStation station) { mClient.onInitializePlayerStart("Connecting..."); mMediaPlayer = new StatefulMediaPlayer(station); mMediaPlayer.setOnBufferingUpdateListener(this); mMediaPlayer.setOnInfoListener(this); mMediaPlayer.setOnPreparedListener(this); mMediaPlayer.prepareAsync(); } /** * Initializes a StatefulMediaPlayer for streaming playback of the provided stream url * @param streamUrl The URL of the stream to play. */ public void initializePlayer(String streamUrl) { mMediaPlayer = new StatefulMediaPlayer(); mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); try { mMediaPlayer.setDataSource(streamUrl); } catch (Exception e) { Log.e("MediaPlayerService", "error setting data source"); mMediaPlayer.setState(MPStates.ERROR); } mMediaPlayer.setOnBufferingUpdateListener(this); mMediaPlayer.setOnInfoListener(this); mMediaPlayer.setOnPreparedListener(this); mMediaPlayer.prepareAsync(); } @Override public IBinder onBind(Intent arg0) { return mBinder; } @Override public void onBufferingUpdate(MediaPlayer player, int percent) { MusicPlayerActivity.seekbar.setSecondaryProgress(percent); } @Override public boolean onError(MediaPlayer player, int what, int extra) { mMediaPlayer.reset(); mClient.onError(); return true; } @Override public boolean onInfo(MediaPlayer mp, int what, int extra) { return false; } @Override public void onPrepared(MediaPlayer player) { mClient.onInitializePlayerSuccess(); startMediaPlayer(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { return START_STICKY; } /** * Pauses the contained StatefulMediaPlayer */ public void pauseMediaPlayer() { Log.d("MediaPlayerService","pauseMediaPlayer() called"); mMediaPlayer.pause(); stopForeground(true); } /** * Sets the client using this service. * @param client The client of this service, which implements the IMediaPlayerServiceClient interface */ public void setClient(IMediaPlayerServiceClient client) { this.mClient = client; } /** * Starts the contained StatefulMediaPlayer and foregrounds the service to support * persisted background playback. */ public void startMediaPlayer() { Context context = getApplicationContext(); //set to foreground /*Notification notification = new Notification(android.R.drawable.ic_media_play, "MediaPlayerService", System.currentTimeMillis());*/ /*Notification notification = new Notification();*/ /*Intent notificationIntent = new Intent(this, MusicPlayerActivity.class); notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); CharSequence contentTitle = "MediaPlayerService Is Playing"; CharSequence contentText = mMediaPlayer.getStreamStation().getStationLabel();*/ /*notification.setLatestEventInfo(context, contentTitle, contentText, pendingIntent); startForeground(1, notification);*/ Log.d("MediaPlayerService","startMediaPlayer() called"); mMediaPlayer.start(); // MusicPlayerActivity.startPlayProgressUpdater(); //MusicPlayerActivity.updateSeekProgress(); updateSeekProgress(); //MusicPlayerActivity.setProgressBar(); } private final static Handler handler1 = new Handler(); private final static Runnable r = new Runnable() { @Override public void run() { updateSeekProgress(); } }; public static void updateSeekProgress() { if (mMediaPlayer.isPlaying()) { MusicPlayerActivity.seekbar.setProgress((int)(((float)mMediaPlayer.getCurrentPosition() / mMediaPlayer.getDuration()) * 100)); handler1.postDelayed(r, 1000); } } /** * Stops the contained StatefulMediaPlayer. */ public void stopMediaPlayer() { stopForeground(true); mMediaPlayer.stop(); mMediaPlayer.release(); } public void resetMediaPlaer() { stopForeground(true); mMediaPlayer.reset(); } } </code></pre> <p>This is the activity from where I am plaing song...</p> <pre><code>public class MusicPlayerActivity extends ActionBarActivity implements mp.IMediaPlayerServiceClient{ public static StatefulMediaPlayer mMediaPlayer; // private StreamStation mSelectedStream = CONSTANTS.DEFAULT_STREAM_STATION; private StreamStation mSelectedStream; public static MediaPlayerService mService; public static String streamUrl; public static String lyricsText; TextView lyricsTextView; //ImageButton playButton; private ScrollView scrollView1; private Timer scrollTimer = null; private boolean mBound; public int lengthOfAudio; ActionBar actionBar; TextView txt_actionTitle; private ProgressDialog mProgressDialog; // streaming var private static final String LOG_TAG = "AudioRecordTest"; private static ToggleButton playPauseButton = null; public static StreamingMediaPlayer audioStreamer; private int current = 0; private static boolean running = true; private int duration = 0; private boolean isPlaying; //public static SeekBar progressBar; public static SeekBar seekbar; private static String mFileName = null; private MediaPlayer mPlayer = null; private Handler handler = new Handler(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_music_player); // initialize receiver IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); BroadcastReceiver mReceiver = new BootReceiver(); registerReceiver(mReceiver, filter); actionBar = getSupportActionBar(); actionBar.setDisplayShowCustomEnabled(true); actionBar.setDisplayShowTitleEnabled(false); actionBar.setCustomView(R.layout.actionbar_view); txt_actionTitle = (TextView)actionBar.getCustomView().findViewById(R.id.action_title); actionBar.setIcon(R.drawable.music_icon); txt_actionTitle.setText(SongListActivity.songName); actionBar.setDisplayHomeAsUpEnabled(true); //progressBar = (SeekBar) findViewById(R.id.progressBar); seekbar = (SeekBar) findViewById(R.id.progressBar); lyricsTextView = (TextView) findViewById(R.id.lirics); lyricsTextView.setTypeface(HomeActivity.face); scrollView1 = (ScrollView) findViewById(R.id.scrollview); //playButton = (ImageButton) findViewById(R.id.playPause); bindToService(); mProgressDialog = new ProgressDialog(this); initializeButtons(); initControls(); try { new LoadLyricsOperation().execute(""); } catch (Exception ex) { // TODO: handle exception Log.e(" Lyrics - Background Process - ", ex.getMessage()); } seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { // TODO Auto-generated method stub seekBar.setProgress(progress); } }); } /*public static void setProgressBar(){ Log.i("Total :", ""+mMediaPlayer.getDuration()); progressBar.setMax(mMediaPlayer.getDuration()); progressBar.postDelayed(onEverySecond, 1000); } */ public void bindToService() { Intent intent = new Intent(this, MediaPlayerService.class); if (MediaPlayerServiceRunning()) { // Bind to LocalService bindService(intent, mConnection, Context.BIND_AUTO_CREATE); } else { startService(intent); bindService(intent, mConnection, Context.BIND_AUTO_CREATE); } } private void initializeButtons() { // PLAY/PAUSE BUTTON playPauseButton = (ToggleButton) findViewById(R.id.playPause); playPauseButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (mBound) { mMediaPlayer = mService.getMediaPlayer(); //pressed pause -&gt;pause if (!playPauseButton.isChecked()) { if (mMediaPlayer.isStarted()) { mService.pauseMediaPlayer(); } } //pressed play else if (playPauseButton.isChecked()) { // STOPPED, CREATED, EMPTY, -&gt; initialize if (mMediaPlayer.isStopped() || mMediaPlayer.isCreated() || mMediaPlayer.isEmpty()) { //mMediaPlayer.getDuration(); /*mSelectedStream = streamUrl;*/ mSelectedStream = new StreamStation(streamUrl); mService.initializePlayer(mSelectedStream); // updateSeekProgress(); } //prepared, paused -&gt; resume play else if (mMediaPlayer.isPrepared() || mMediaPlayer.isPaused()) { mService.startMediaPlayer(); //updateSeekProgress(); //progressBar.setMax(mMediaPlayer.getDuration()); // progressBar.postDelayed(onEverySecond, 1000); } } } } }); } private ServiceConnection mConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName className, IBinder serviceBinder) { Log.d("MainActivity","service connected"); //bound with Service. get Service instance MediaPlayerBinder binder = (MediaPlayerBinder) serviceBinder; mService = binder.getService(); //send this instance to the service, so it can make callbacks on this instance as a client mService.setClient(MusicPlayerActivity.this); mBound = true; //Set play/pause button to reflect state of the service's contained player final ToggleButton playPauseButton = (ToggleButton) findViewById(R.id.playPause); playPauseButton.setChecked(mService.getMediaPlayer().isPlaying()); //Set station Picker to show currently set stream station //Spinner stationPicker = (Spinner) findViewById(R.id.stationPicker); /*if(mService.getMediaPlayer() != null &amp;&amp; mService.getMediaPlayer().getStreamStation() != null) { for (int i = 0; i &lt; CONSTANTS.STATIONS.length; i++) { if (mService.getMediaPlayer().getStreamStation().equals(CONSTANTS.STATIONS[i])) { stationPicker.setSelection(i); mSelectedStream = (StreamStation) stationPicker.getItemAtPosition(i); } } }*/ } @Override public void onServiceDisconnected(ComponentName arg0) { mBound = false; } }; /** Determines if the MediaPlayerService is already running. * @return true if the service is running, false otherwise. */ private boolean MediaPlayerServiceRunning() { ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE); for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) { if ("mp.MediaPlayerService".equals(service.service.getClassName())) { return true; } } return false; } public void onInitializePlayerSuccess() { mProgressDialog.dismiss(); //updateSeekProgress(); final ToggleButton playPauseButton = (ToggleButton) findViewById(R.id.playPause); playPauseButton.setChecked(true); } public void onInitializePlayerStart(String message) { mProgressDialog = ProgressDialog.show(this, "", message, true); mProgressDialog.getWindow().setGravity(Gravity.TOP); mProgressDialog.setCancelable(true); mProgressDialog.setOnCancelListener(new OnCancelListener() { @Override public void onCancel(DialogInterface dialogInterface) { MusicPlayerActivity.this.mService.resetMediaPlaer(); final ToggleButton playPauseButton = (ToggleButton) findViewById(R.id.playPause); playPauseButton.setChecked(false); } }); } @Override public void onError() { mProgressDialog.cancel(); } /** * Closes unbinds from service, stops the service, and calls finish() */ public void shutdownActivity() { if (mBound) { mService.stopMediaPlayer(); // Detach existing connection. unbindService(mConnection); mBound = false; } Intent intent = new Intent(this, MediaPlayerService.class); stopService(intent); finish(); } private void getLyrics() { // TODO Auto-generated method stub try { InputStream in = getResources().openRawResource(R.raw.z_data); DocumentBuilder builder = DocumentBuilderFactory.newInstance() .newDocumentBuilder(); Document doc = builder.parse(in,null); NodeList albumnode = doc.getElementsByTagName("album"); for (int k = 0; k &lt; albumnode.getLength(); k++) { Node album = albumnode.item(k); Element fstElmnt = (Element) album; String albu = fstElmnt.getAttribute("value"); if (albu.equals(TrackFragment.albumName)) { NodeList songList = fstElmnt.getElementsByTagName("songs"); for (int i = 0; i &lt; songList.getLength(); i++) { Node song = songList.item(i); Element songElmnt = (Element) song; String songval = songElmnt.getAttribute("value"); if (songval.equals(SongListActivity.songName)) { NodeList urlList = songElmnt .getElementsByTagName("url"); Node uNode = urlList.item(0); Element urlElememt = (Element) uNode; streamUrl = urlElememt.getAttribute("value"); NodeList lyrcsList = songElmnt .getElementsByTagName("lyrics"); Node lNode = lyrcsList.item(0).getFirstChild(); lyricsText = lNode.getNodeValue(); //System.out.print(lyricsText); } } } } in.close(); } catch (Exception t) { Log.e("Exception: ", t.getMessage()); } } public class LoadLyricsOperation extends AsyncTask&lt;String, Void, String&gt; { @Override protected String doInBackground(String... params) { try { getLyrics(); } catch (Exception ex) { } return "Executed"; } @Override protected void onPostExecute(String result) { try { if (lyricsText != null) { lyricsTextView.setText(lyricsText); } if (streamUrl != null) { //startStreamingAudio(streamUrl); scroll(); } } catch (Exception ex) { } } @Override protected void onPreExecute() { try { } catch (Exception ex) { } } } /*private void startStreamingAudio(String urlstring) { try { final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar); if (audioStreamer != null) { audioStreamer.interrupt(); } audioStreamer = new StreamingMediaPlayer(this, textStreamed, (ImageButton) playButton, streamButton, progressBar); audioStreamer.startStreaming(urlstring, 5208, 216); // streamButton.setEnabled(false); } catch (Exception e) { Log.e(getClass().getName(), "Error starting to stream audio.", e); } }*/ public MusicPlayerActivity() { mFileName = Environment.getExternalStorageDirectory().getAbsolutePath(); mFileName += "/audiorecordtest.mp3"; } public class PlayButton extends Button { boolean mStartPlaying = true; OnClickListener clicker = new OnClickListener() { public void onClick(View v) { onPlay(mStartPlaying); if (mStartPlaying) { setText("Stop playing"); } else { setText("Start playing"); } mStartPlaying = !mStartPlaying; } }; public PlayButton(Context ctx) { super(ctx); setText("Start playing"); setOnClickListener(clicker); } } private void onPlay(boolean start) { if (start) { startPlaying(); } else { stopPlaying(); } } private void startPlaying() { mPlayer = new MediaPlayer(); try { mPlayer.setDataSource(mFileName); mPlayer.prepare(); mPlayer.start(); } catch (IOException e) { Log.e(LOG_TAG, "prepare() failed"); } } private void stopPlaying() { mPlayer.release(); mPlayer = null; } private void initControls() { /* //playButton.setEnabled(false); playButton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { if(!StreamingMediaPlayer.buffering) { if (audioStreamer.getMediaPlayer() != null) { if (audioStreamer.getMediaPlayer().isPlaying()) { audioStreamer.getMediaPlayer().pause(); playButton.setImageResource(R.drawable.player_play_icon); } else { audioStreamer.getMediaPlayer().start(); audioStreamer.startPlayProgressUpdater(); playButton.setImageResource(R.drawable.player_pause_icon); } } } else { Toast.makeText(MusicPlayerActivity.this, "Buffering...", Toast.LENGTH_SHORT).show(); } isPlaying = !isPlaying; } }); startStreamingAudio(streamUrl); */ } public void scroll() { if (scrollTimer == null) { scrollTimer = new Timer(); } TimerTask scrollerSchedule = new TimerTask() { @Override public void run() { handler.post(new Runnable() { public void run() { // Here I want to increment the scrollbar's vertical // position by 1 int x = scrollView1.getScrollY(); scrollView1.smoothScrollTo(0, x + 1); } }); } }; scrollTimer.schedule(scrollerSchedule, 0, 120); } /*private static Runnable onEverySecond = new Runnable() { @Override public void run(){ if(true == running){ if(progressBar != null) { Log.i("Current :", ""+mMediaPlayer.getCurrentPosition()); progressBar.setProgress(mMediaPlayer.getCurrentPosition()); } if(mMediaPlayer.isPlaying()) { progressBar.postDelayed(onEverySecond, 1000); // updateTime(); } } } };*/ /*@Override public void onPrepared(MediaPlayer arg0) { // TODO Auto-generated method stub mService.onPrepared(arg0); duration = mMediaPlayer.getDuration(); progressBar.setMax(duration); progressBar.postDelayed(onEverySecond, 1000); }*/ protected void onDestroy() { super.onDestroy(); if (audioStreamer != null) { audioStreamer.interrupt(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.image, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch(item.getItemId()) { case R.id.action_share: if (audioStreamer != null) { audioStreamer.interrupt(); } /*if(StreamingMediaPlayer.buffering) { audioStreamer.startPlayProgressUpdater(); }*/ Intent share = new Intent(Intent.ACTION_SEND); share.setType("text/plain"); share.putExtra(Intent.EXTRA_TEXT,"I am Listening " + SongListActivity.songName +" Song.\n\n Lirics:\n"+lyricsText+"\n\n From : https://play.google.com/store/apps/details?id="+getPackageName()); startActivity(Intent.createChooser(share, "Share")); break; case android.R.id.home: if (audioStreamer != null) { audioStreamer.interrupt(); } Intent i = new Intent(getApplicationContext(), SongListActivity.class); startActivity(i); break; } return false; } @Override public void onBackPressed() { if (playPauseButton.isChecked() == true) { //mService.pauseMediaPlayer(); Toast.makeText(getApplicationContext(), "Stop Media Player", Toast.LENGTH_SHORT).show(); } else { shutdownActivity(); seekbar.setMax(0); BootReceiver.wasScreenOnmp = false; mMediaPlayer = null; finish(); } /*if (audioStreamer != null) { //StreamingMediaPlayer.mediaPlayer = null; audioStreamer.interrupt(); }*/ //StreamingMediaPlayer.buffering = true; /*Intent i = new Intent(getApplicationContext(), SongListActivity.class); startActivity(i);*/ //super.onBackPressed(); } @Override protected void onPause() { if (BootReceiver.wasScreenOnmp) { // this is the case when onPause() is called by the system due to a // screen state change System.out.println("SCREEN TURNED OFF"); //System.out.println(playPauseButton.isChecked()); if(mMediaPlayer != null){ mService.pauseMediaPlayer(); playPauseButton.setChecked(false); /*if(mMediaPlayer.isPlaying()) { System.out.println("Song Playing"); mService.pauseMediaPlayer(); }else { System.out.println("Song Paused"); }*/ } } else { // this is when onPause() is called when the screen state has not // changed } super.onPause(); } @Override protected void onResume() { super.onResume(); } } </code></pre>
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    1. PTQuestion
    1. USAlfred Myers
    1. USshivani patel
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POAttempt to call getDuration without a valid mediaplayer in android
      1. This table or related slice is empty.
      1. VTModeratorReview
    1. COI think You might be calling getDuration before the file is fully loaded...
      singulars
      1. POAttempt to call getDuration without a valid mediaplayer in android
      1. USPiyush
    2. COHave you load it on onPreapared() method????????
      singulars
      1. POAttempt to call getDuration without a valid mediaplayer in android
      1. USPiyush
    3. COYes i have load it
      singulars
      1. POAttempt to call getDuration without a valid mediaplayer in android
      1. USshivani patel
 

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