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Android mediaplayer play in background

I am working on mediaplayer app, but i have problem with onDestroy methods, i need to continue with playing music when i minimalize the app. But when i do it stops playing and throws errors or when i comment it, it is playing in background but problem is that it doesnt stop even when i kill the app, i can controll it just with my notification controller, but when i destroy controller by swiping, it is playing and i have music in background without music player.
public class MainActivity extends AppCompatActivity {
private MediaPlayerService player;
private boolean serviceBound = false;
private ArrayList<Audio> audioList;
private RWAdapter rwa;
private RecyclerView rv;
public static final String Broadcast_PLAY_NEW_AUDIO = "com.example.rsabo.mp3player.PlayNewAudio";
public static final String Broadcast_PAUSE_AUDIO= "com.example.rsabo.mp3player.PauseAudio";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 0);
}
loadAudio();
initRW();
}
private void initRW(){
if (audioList.size()>0) {
rv = (RecyclerView) findViewById(R.id.myRecyclerView);
rv.setLayoutManager(new LinearLayoutManager(this));
;
rwa = new RWAdapter(audioList, getApplicationContext());
rv.setAdapter(rwa);
rv.addOnItemTouchListener(new MyTouchListener(this, new onItemClickListener() {
#Override
public void onClick(View view, int index) {
playAudio(index);
}
}));
}
}
//ulozi sa instancia
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean("ServiceState", serviceBound);
}
//obnovi sa instancia tam kde bola naposledy ulozena
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
serviceBound = savedInstanceState.getBoolean("ServiceState");
}
//znici instanciu
#Override
protected void onDestroy() {
super.onDestroy();
// if(serviceBound){
// unbindService(serviceConnection);
// player.stopSelf();
// }
}
//viaze tuto triedu s prehravacom, nastavi hodnotu serviceBound na true ked sa vytvori spojenie
private ServiceConnection serviceConnection = new ServiceConnection(){
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
MediaPlayerService.LocalBinder binder = (MediaPlayerService.LocalBinder) service;
player = binder.getService();
serviceBound = true;
Toast.makeText(MainActivity.this, "Service bound", Toast.LENGTH_SHORT).show();
}
#Override
public void onServiceDisconnected(ComponentName name) {
serviceBound = false;
}
};
//Metoda pozrie ci je sluzba aktivna,
//ak nie je, do uloziska hodi arraylist s pesnickami, a spusti sluzbu
//ak je vlozi do uloziska novy audioIndex a posle spravu ze ma spustit pesnicku
private void playAudio(int audioIndex){
if(!serviceBound){
Ulozisko ulozisko = new Ulozisko(getApplicationContext());
ulozisko.storeAudio(audioList);
ulozisko.storeAudioIndex(audioIndex);
Intent playerIntent = new Intent(this, MediaPlayerService.class);
startService(playerIntent);
bindService(playerIntent, serviceConnection, Context.BIND_AUTO_CREATE);
} else {
Ulozisko ulozisko = new Ulozisko(getApplicationContext());
ulozisko.storeAudioIndex(audioIndex);
Intent broadcastIntent = new Intent(Broadcast_PLAY_NEW_AUDIO);
sendBroadcast(broadcastIntent);
}
}
private void pauseAudio(){
Intent broadcastIntent = new Intent(Broadcast_PAUSE_AUDIO);
sendBroadcast(broadcastIntent);
}
//nacita pesnicky z mobilu
private void loadAudio() {
ContentResolver contentResolver = getContentResolver();
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
String selection = MediaStore.Audio.Media.IS_MUSIC + "!= 0";
String sortOrder = MediaStore.Audio.Media.TITLE + " ASC";
Cursor cursor = contentResolver.query(uri, null, selection, null, sortOrder);
if(cursor != null && cursor.getCount() > 0) {
audioList = new ArrayList<>();
while (cursor.moveToNext()){
String data = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
String title = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
String album = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
String artist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
audioList.add(new Audio(data, title, album, artist));
}
}
cursor.close();
}
}
MediaPlayerService
public class MediaPlayerService extends Service implements MediaPlayer.OnCompletionListener, MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener,
MediaPlayer.OnSeekCompleteListener, MediaPlayer.OnInfoListener, MediaPlayer.OnBufferingUpdateListener,
AudioManager.OnAudioFocusChangeListener {
private static final int NOTIFICATION_ID = 101;
private MediaSessionManager mediaSessionManager;
private MediaSessionCompat mediaSession;
private MediaControllerCompat.TransportControls transportControls;
private MediaPlayer mediaPlayer;
private String mediaFile;
private int resumePosition;
private AudioManager audioManager;
private boolean hovor = false;
private PhoneStateListener phoneStateListener;
private TelephonyManager telephonyManager;
private ArrayList<Audio> audioList;
private int audioIndex = -1;
private Audio activeAudio;
private final IBinder iBinder = new LocalBinder();
private PlayStatus status;
public static final String ACTION_PLAY = "com.example.rsabo.mp3player.ACTION_PLAY";
public static final String ACTION_PAUSE = "com.example.rsabo.mp3player.ACTION_PAUSE";
public static final String ACTION_PREVIOUS = "com.example.rsabo.mp3player.ACTION_PREVIOUS";
public static final String ACTION_NEXT = "com.example.rsabo.mp3player.ACTION_NEXT";
public static final String ACTION_STOP = "com.example.rsabo.mp3player.ACTION_STOP";
#Nullable
#Override
public IBinder onBind(Intent intent) {
return iBinder;
}
//pri vytvoreni zavola metody callStateListener(),registerJeNahlasReciever(), registerPlayNewAudio()
#Override
public void onCreate() {
super.onCreate();
callStateListener();
registerJeNahlasReciever();
registerPlayNewAudio();
}
//podla priority zvuku v systeme zvysi zvuk, ukonci, zastavi alebo stisi mediaPlayer
#Override
public void onAudioFocusChange(int focusChange) {
switch (focusChange) {
case AudioManager.AUDIOFOCUS_GAIN:
if (mediaPlayer == null) initMediaPlayer();
else if (!mediaPlayer.isPlaying()) mediaPlayer.start();
mediaPlayer.setVolume(1.0f, 1.0f);
break;
case AudioManager.AUDIOFOCUS_LOSS:
if (mediaPlayer.isPlaying()) mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
if (mediaPlayer.isPlaying()) mediaPlayer.pause();
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
if (mediaPlayer.isPlaying()) mediaPlayer.setVolume(0.1f, 0.1f);
break;
}
}
//metoda na ziskanie AudioFocusu/priority hrania zvuku
private boolean requestAudioFocus() {
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int result = audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
return result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
}
//metoda ktora odstrani audioFocus
private boolean removeAudioFocus() {
return AudioManager.AUDIOFOCUS_REQUEST_GRANTED == audioManager.abandonAudioFocus(this);
}
#Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
}
#Override
public void onCompletion(MediaPlayer mp) {
skipToNext();
buildNotification(PlayStatus.PLAYING);
}
#Override
public boolean onError(MediaPlayer mp, int what, int extra) {
switch (what) {
case MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK:
Log.d("Media Player error", "MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK" + extra);
break;
case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
Log.d("Media Player error", "MEDIA_ERROR_SERVER_DIED" + extra);
break;
case MediaPlayer.MEDIA_ERROR_UNKNOWN:
Log.d("Media Player error", "MEDIA_ERROR_UNKNOWN" + extra);
break;
}
return false;
}
#Override
public boolean onInfo(MediaPlayer mp, int what, int extra) {
return false;
}
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
#Override
public void onSeekComplete(MediaPlayer mp) {
}
class LocalBinder extends Binder {
MediaPlayerService getService() {
return MediaPlayerService.this;
}
}
//inicializacia mediaPlayeru, ak sa nenastavi cesta vyhodi chybu a zastavi sa
private void initMediaPlayer() {
if (mediaPlayer == null)
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnSeekCompleteListener(this);
mediaPlayer.setOnInfoListener(this);
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
// nastavi cestu k hudbe
mediaPlayer.setDataSource(activeAudio.getData());
} catch (IOException e) {
e.printStackTrace();
stopSelf();
}
mediaPlayer.prepareAsync();
}
//nastavenie funkcie tlacidla play
private void playMedia() {
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
}
}
//nastavenie funkcie tlacidla stop
private void stopMedia() {
if (mediaPlayer == null) return;
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
}
//nastavenie funkcie tlacidla pause
private void pauseMedia() {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
resumePosition = mediaPlayer.getCurrentPosition();
}
}
//nastavenie funkcie tlacidla resume
private void resumeMedia() {
if (!mediaPlayer.isPlaying()) {
mediaPlayer.seekTo(resumePosition);
mediaPlayer.start();
}
}
//inicializuje prhravac, ak neziska audiofocus alebo cestu k hudbe zastavi sa
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
try {
Ulozisko ulozisko = new Ulozisko(getApplicationContext());
audioList = ulozisko.loadAudio();
audioIndex = ulozisko.loadAudioIndex();
if (audioIndex != -1 && audioIndex < audioList.size()) {
activeAudio = audioList.get(audioIndex);
} else {
stopSelf();
}
} catch (NullPointerException e) {
stopSelf();
}
if (!requestAudioFocus()) {
stopSelf();
}
if (mediaSessionManager == null) {
try {
initMediaSession();
initMediaPlayer();
} catch (RemoteException e) {
e.printStackTrace();
stopSelf();
}
buildNotification(PlayStatus.PLAYING);
}
handleIncomingActions(intent);
return super.onStartCommand(intent, flags, startId);
}
//metode prida zrusenie audiofocusu a nastavi prehravac na null, vypne phoneStateListener, odregistruje recievre, zmaze notifikaciu a vycisti playlist
#Override
public void onDestroy() {
super.onDestroy();
if (mediaPlayer != null) {
stopMedia();
mediaPlayer.release();
}
removeAudioFocus();
if (phoneStateListener != null) {
telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
}
removeNotification();
unregisterReceiver(jeNahlasReciever);
unregisterReceiver(playNewAudio);
new Ulozisko(getApplicationContext()).clearCacheAudioPlaylist();
}
//ked sa vyberu sluchadla tak sa hranie zastavi
private BroadcastReceiver jeNahlasReciever = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
pauseMedia();
buildNotification(PlayStatus.PAUSED);
}
};
private void registerJeNahlasReciever() {
IntentFilter intentFilter = new IntentFilter(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
registerReceiver(jeNahlasReciever, intentFilter);
}
//metoda ktora zisiti v akom stave je hovor, a ked telefon zvoni alebo prebieha hovor, zastavi prehravanie
private void callStateListener() {
telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
phoneStateListener = new PhoneStateListener() {
#Override
public void onCallStateChanged(int state, String incomingNumber) {
switch (state) {
case TelephonyManager.CALL_STATE_OFFHOOK:
case TelephonyManager.CALL_STATE_RINGING:
if (mediaPlayer != null) {
pauseMedia();
hovor = true;
}
break;
case TelephonyManager.CALL_STATE_IDLE:
if (mediaPlayer != null) {
if (hovor) {
hovor = false;
resumeMedia();
}
}
break;
}
}
};
telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
}
//ked prepnem pesnicku tak sa pomocou tejto metody resetne prehravac a prepne na dalsiu pesnicku podla indexu ktory dostala v sprave
private BroadcastReceiver playNewAudio = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
// if(status == PlayStatus.PAUSED) {
audioIndex = new Ulozisko(getApplicationContext()).loadAudioIndex();
if (audioIndex != -1 && audioIndex < audioList.size()) {
activeAudio = audioList.get(audioIndex);
} else {
stopSelf();
}
stopMedia();
mediaPlayer.reset();
initMediaPlayer();
updateInfo();
buildNotification(PlayStatus.PLAYING);
// } else if (status == PlayStatus.PLAYING){
// pauseMedia();
// updateInfo();
// buildNotification(PlayStatus.PAUSED);
// }
}
};
private void registerPlayNewAudio() {
IntentFilter filter = new IntentFilter(MainActivity.Broadcast_PLAY_NEW_AUDIO);
registerReceiver(playNewAudio, filter);
}
//skontroluje ci mediaSessionManager existuje
//vytvori mediaSession a da mu controller
private void initMediaSession() throws RemoteException {
if (mediaSessionManager != null) return;
mediaSessionManager = (MediaSessionManager) getSystemService(Context.MEDIA_SESSION_SERVICE);
mediaSession = new MediaSessionCompat(getApplicationContext(), "Prehravac");
transportControls = mediaSession.getController().getTransportControls();
mediaSession.setActive(true);
mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
updateInfo();
mediaSession.setCallback(new MediaSessionCompat.Callback() {
#Override
public void onPlay() {
super.onPlay();
resumeMedia();
buildNotification(PlayStatus.PLAYING);
}
#Override
public void onPause() {
super.onPause();
pauseMedia();
buildNotification(PlayStatus.PAUSED);
}
#Override
public void onSkipToNext() {
super.onSkipToNext();
skipToNext();
updateInfo();
buildNotification(PlayStatus.PLAYING);
}
#Override
public void onSkipToPrevious() {
super.onSkipToPrevious();
skipToPrevious();
updateInfo();
buildNotification(PlayStatus.PLAYING);
}
#Override
public void onStop() {
super.onStop();
removeNotification();
stopSelf();
}
#Override
public void onSeekTo(long pos) {
super.onSeekTo(pos);
}
});
}
//updatne aktualne info o pesnicke
private void updateInfo() {
Bitmap albumArt = BitmapFactory.decodeResource(getResources(), R.drawable.image);
mediaSession.setMetadata(new MediaMetadataCompat.Builder()
//.putBitmap(MediaMetadataCompat.METADATA_KEY_ALBUM_ART, albumArt)
.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, activeAudio.getArtist())
.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, activeAudio.getAlbum())
.putString(MediaMetadataCompat.METADATA_KEY_TITLE, activeAudio.getTitle())
.build());
}
//metoda ktora prepne pesnicku na dalsiu, ak je pesnicka posledna tak ju nastavi na prvu v zozname
private void skipToNext() {
if (audioIndex == audioList.size() - 1) {
audioIndex = 0;
activeAudio = audioList.get(audioIndex);
} else {
activeAudio = audioList.get(++audioIndex);
}
new Ulozisko(getApplicationContext()).storeAudioIndex(audioIndex);
stopMedia();
mediaPlayer.reset();
initMediaPlayer();
}
//metoda ktora prepne pesnicku dozadu, ak je na zaciatku zoznamu tak ju nastavi na poslednu
private void skipToPrevious() {
if (audioIndex == 0) {
audioIndex = audioList.size() - 1;
activeAudio = audioList.get(audioIndex);
} else {
activeAudio = audioList.get(--audioIndex);
}
new Ulozisko(getApplicationContext()).storeAudioIndex(audioIndex);
stopMedia();
mediaPlayer.reset();
initMediaPlayer();
}
//metoda ktora spravi v notifikacnom panely prehravac a vzdy ked sa vola tato metoda tak sa v notifikacii updatne info o pesnicke
private void buildNotification(PlayStatus playStatus) {
int notificationAction = android.R.drawable.ic_media_pause;
PendingIntent playAleboPause = null;
if (playStatus == PlayStatus.PLAYING) {
notificationAction = android.R.drawable.ic_media_pause;
playAleboPause = playbackAction(1);
status = PlayStatus.PLAYING;
} else if (playStatus == PlayStatus.PAUSED) {
notificationAction = android.R.drawable.ic_media_play;
playAleboPause = playbackAction(0);
status = PlayStatus.PAUSED;
}
Bitmap albumArt = BitmapFactory.decodeResource(getResources(), R.drawable.image);
NotificationCompat.Builder notificationBuilder = (NotificationCompat.Builder) new NotificationCompat.Builder(this)
.setShowWhen(false)
.setStyle(new NotificationCompat.MediaStyle()
.setMediaSession(mediaSession.getSessionToken())
.setShowActionsInCompactView(0, 1, 2))
.setColor(getResources().getColor(R.color.colorPrimary))
//.setLargeIcon(activeAudio.)
.setSmallIcon(android.R.drawable.stat_sys_headset)
.setContentText(activeAudio.getArtist())
.setContentTitle(activeAudio.getTitle())
.setSubText(activeAudio.getAlbum())
.addAction(android.R.drawable.ic_media_previous, "previous", playbackAction(3))
.addAction(notificationAction, "pause", playAleboPause)
.addAction(ic_media_next, "next", playbackAction(2));
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).notify(NOTIFICATION_ID, notificationBuilder.build());
}
//zmaze notifikaciu
private void removeNotification() {
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.cancel(NOTIFICATION_ID);
}
// nastavenie akcie na tlacidla v notifikacii
private PendingIntent playbackAction(int cisloAkcie) {
Intent akcia = new Intent(this, MediaPlayerService.class);
switch (cisloAkcie) {
case 0:
akcia.setAction(ACTION_PLAY);
return PendingIntent.getService(this, cisloAkcie, akcia, 0);
case 1:
akcia.setAction(ACTION_PAUSE);
return PendingIntent.getService(this, cisloAkcie, akcia, 0);
case 2:
akcia.setAction(ACTION_NEXT);
return PendingIntent.getService(this, cisloAkcie, akcia, 0);
case 3:
akcia.setAction(ACTION_PREVIOUS);
return PendingIntent.getService(this, cisloAkcie, akcia, 0);
default:
break;
}
return null;
}
//metoda zisti ktora akcia je aktualna a zavola metodu cez transportControls
private void handleIncomingActions(Intent playbackAction) {
if (playbackAction == null || playbackAction.getAction() == null) return;
String akcia = playbackAction.getAction();
if (akcia.equalsIgnoreCase(ACTION_PLAY)) {
transportControls.play();
} else if (akcia.equalsIgnoreCase(ACTION_PAUSE)) {
transportControls.pause();
} else if (akcia.equalsIgnoreCase(ACTION_NEXT)) {
transportControls.skipToNext();
} else if (akcia.equalsIgnoreCase(ACTION_PREVIOUS)) {
transportControls.skipToPrevious();
} else if (akcia.equalsIgnoreCase(ACTION_STOP)) {
transportControls.stop();
}
}
}

Try this to startForeground()
Notification.Builder mBuilder = new Notification.Builder(this)
.setSmallIcon(R.mipmap.ic_icon)
.setContentTitle(getString(R.string.title))
.setContentText("");
Intent resultIntent = new Intent(this, ResultIntent.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(ParentStack.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
int mId = 1489;
startForeground(mId, mBuilder.build());

Android - SeekBar and MediaPlayer

I needed to connect my SeekBar with my MediaPlayer in my App.
I set up the SeekBar via xml like this:
<SeekBar
android:id="#+id/song_seekbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"/>
and followed this SO answer to implement it.
This is my code:
public class Song_main extends AppCompatActivity {
private final int SONG_REQUEST_CODE = 1;
private Uri song;
private TextView selectSong;
private SeekBar seekBar;
private Handler handler;
private MediaPlayer mediaPlayer;
private boolean repeatPressedTwice = false;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.app_bar_song_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.song_main_toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
seekBar = (SeekBar) findViewById(R.id.song_seekbar);
handler = new Handler();
notSelected();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.song, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.song_plus) {
Intent selectIntent = new Intent(Intent.ACTION_GET_CONTENT);
selectIntent.setType("audio/*");
startActivityForResult(selectIntent, SONG_REQUEST_CODE);
}
return true;
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == SONG_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
if ((data != null) && (data.getData()!=null)) {
song = data.getData();
setup();
}
}
}
private void notSelected() {
selectSong = (TextView) findViewById(R.id.select_song_textview);
selectSong.setText(getResources().getString(R.string.song_not_selected));
}
public void onPlayButtonClicked(View v) {
ImageButton pb = (ImageButton) findViewById(R.id.song_play_button);
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
pb.setImageResource(R.drawable.pause);
updateSeekBar();
} else {
mediaPlayer.pause();
pb.setImageResource(R.drawable.ic_play_arrow_white_24dp);
}
}
public void onControlsClicked(View v) {
if (v.getId() == R.id.fast_forward) {
int pos = mediaPlayer.getCurrentPosition();
pos += 1500;
mediaPlayer.seekTo(pos);
}
else if (v.getId() == R.id.fast_backward) {
int pos = mediaPlayer.getCurrentPosition();
pos -= 1500;
mediaPlayer.seekTo(pos);
}
else if (v.getId() == R.id.skip_backward) {
mediaPlayer.seekTo(0);
}
}
public void onRepeatClicked(View v) {
if (!repeatPressedTwice) {
// TODO: change visual color of repeat button
mediaPlayer.setLooping(true);
Toast.makeText(this, "repeat enabled", Toast.LENGTH_SHORT).show();
repeatPressedTwice = true;
} else {
mediaPlayer.setLooping(false);
}
}
private void setup() {
/* the song has been select setup the interface */
/* displays song name in title */
TextView titleView = (TextView) findViewById(R.id.song_appbar_title);
String songName;
ContentResolver contentResolver = this.getContentResolver();
Cursor cursor = contentResolver.query(song, null, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
songName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
titleView.setText(songName);
}
/* removes the notSelected String */
selectSong.setVisibility(View.GONE);
/* setup media player */
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mediaPlayer.setDataSource(getApplicationContext(), song);
mediaPlayer.prepareAsync();
} catch (IOException e) {
Toast.makeText(this, "file not found", Toast.LENGTH_SHORT).show();
}
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
/* show media player layout */
RelativeLayout mpl = (RelativeLayout) findViewById(R.id.media_player_layout);
mpl.setVisibility(View.VISIBLE);
mediaPlayer.start();
ImageButton pb = (ImageButton) findViewById(R.id.song_play_button);
pb.setImageResource(R.drawable.pause);
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
ImageButton pb = (ImageButton) findViewById(R.id.song_play_button);
pb.setImageResource(R.drawable.ic_play_arrow_white_24dp);
}
});
seekBar = (SeekBar) findViewById(R.id.song_seekbar);
seekBar.setMax(mediaPlayer.getDuration());
updateSeekBar();
}
private void updateSeekBar() {
seekBar.setProgress(mediaPlayer.getCurrentPosition()/1000);
handler.postDelayed(runnable, 1000);
}
Runnable runnable = new Runnable() {
#Override
public void run() {
updateSeekBar();
}
};
#Override
public void onStop() {
super.onStop();
if (mediaPlayer!=null)
mediaPlayer.stop();
}
}
The process starts from the onOptionsItemSelected method.
The seekBar behaves correctly, it increments every second. The problem now is that it finishes way before the song finishes.
I tried adding
seekBar.setMax(mediaPlayer.getDuration());
in the setup method, but that causes the bar not to move at all.

You need to define separate Runnable and trigger it every x miliseconds (depends on you) once MediaPlayer starts.
Define a function updateSeekbar like,
private void updateSeekBar() {
audioSeek.setProgress(player.getCurrentPosition());
txtCurrentTime.setText(milliSecondsToTimer(player.getCurrentPosition()));
seekHandler.postDelayed(runnable, 50);
}
And Runnable
Runnable runnable = new Runnable() {
#Override
public void run() {
updateSeekBar();
}
};
Now you just have to call updateSeekbar once when playing starts. In your case:
public void onPlayButtonClicked(View v) {
ImageButton pb = (ImageButton) findViewById(R.id.song_play_button);
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
pb.setImageResource(R.drawable.pause);
updateSeekBar();
} else {
mediaPlayer.pause();
pb.setImageResource(R.drawable.ic_play_arrow_white_24dp);
}
}
FYI
Function milliSecondsToTimer works as follows
private String milliSecondsToTimer(long milliseconds) {
String finalTimerString = "";
String secondsString = "";
// Convert total duration into time
int hours = (int) (milliseconds / (1000 * 60 * 60));
int minutes = (int) (milliseconds % (1000 * 60 * 60)) / (1000 * 60);
int seconds = (int) ((milliseconds % (1000 * 60 * 60)) % (1000 * 60) / 1000);
// Add hours if there
if (hours > 0) {
finalTimerString = hours + ":";
}
// Prepending 0 to seconds if it is one digit
if (seconds < 10) {
secondsString = "0" + seconds;
} else {
secondsString = "" + seconds;
}
finalTimerString = finalTimerString + minutes + ":" + secondsString;
// return timer string
return finalTimerString;
}
UPDATE
You have called setMax at the wrong place. Update setup() function as follows
private void setup() {
/* the song has been select setup the interface */
/* displays song name in title */
TextView titleView = (TextView) findViewById(R.id.song_appbar_title);
String songName;
ContentResolver contentResolver = this.getContentResolver();
Cursor cursor = contentResolver.query(song, null, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
songName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
titleView.setText(songName);
}
/* removes the notSelected String */
selectSong.setVisibility(View.GONE);
/* setup media player */
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mediaPlayer.setDataSource(getApplicationContext(), song);
mediaPlayer.prepareAsync();
} catch (IOException e) {
Toast.makeText(this, "file not found", Toast.LENGTH_SHORT).show();
}
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
/* show media player layout */
seekBar.setMax(mediaPlayer.getDuration());
RelativeLayout mpl = (RelativeLayout) findViewById(R.id.media_player_layout);
mpl.setVisibility(View.VISIBLE);
mediaPlayer.start();
updateSeekBar();
ImageButton pb = (ImageButton) findViewById(R.id.song_play_button);
pb.setImageResource(R.drawable.pause);
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
ImageButton pb = (ImageButton) findViewById(R.id.song_play_button);
pb.setImageResource(R.drawable.ic_play_arrow_white_24dp);
}
});
}

You have implement OnSeekBarChangeListener and in onCreate() add the below line:-
seekBar = (SeekBar) findViewById(R.id.seekBar);
And override the onProgressChanged() method , in this method you can set the progress in the seekbar using the below line:
mPlayer.seekTo(progress);
seekBar.setProgress(progress);
or
After you initialise your MediaPlayer and for example press the play button, you should create an handler and post runnable so you can update your SeekBar (in the UI thread itself) with the current position of your MediaPlayer like this :
private Handler mHandler = new Handler();
//Make sure you update Seekbar on UI thread
MainActivity.this.runOnUiThread(new Runnable(){
#Override
public void run() {
if(mMediaPlayer != null){
int mCurrentPosition = mMediaPlayer.getCurrentPosition() / 1000;
mSeekBar.setProgress(mCurrentPosition);
}
mHandler.postDelayed(this, 1000);
}
});
and update that value every second.
If you need to update the MediaPlayer's position while user drag your SeekBar you should add OnSeekBarChangeListener to your SeekBar and do it there :
mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if(mMediaPlayer != null && fromUser){
mMediaPlayer.seekTo(progress * 1000);
}
}
});

you need to update your Seek bar when you play a song
public void updateProgressBar() {
runOnUiThread(new Runnable() {
#Override
public void run() {
mHandler.postDelayed(mUpdateTimeTask, 100);
}
});
}
Below Runnable method to update seekbar
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
if (MusicService.isRunning()) {
duration = MusicService.getDur();
long currSongPosition = MusicService.getPosn();
totTime.setText(Utility.milliSecondsToTimer(duration));
fromTime.setText(Utility.milliSecondsToTimer(currSongPosition));
int progress = Utility.getProgressPercentage(currSongPosition, duration);
songProgressBar.setProgress(progress);
updateProgressBar();
}
}
};
Using this below function you can get progress percentage from song current position and song duration
public static int getProgressPercentage(long currentDuration, long totalDuration) {
Double percentage;
long currentSeconds = (int) (currentDuration / 1000);
long totalSeconds = (int) (totalDuration / 1000);
percentage = (((double) currentSeconds) / totalSeconds) * 100;
return percentage.intValue();
}

How to transfer data via Bluetooth from two different activities?

I tried to send data from my app to my Arduino board to make the led light.
The problem is that if I send from my main activity it works but if I send it from a second activity (HolopickerColor), it doesn't work and I don't get any errors.
Thanks for your anwsers.
MainActivity :
public class MainActivity extends AppCompatActivity{
private Button mPairedBtn;
Button on, find;
public BluetoothAdapter BA;
private ProgressDialog mProgressDlg;
// public ConnectedThread mConnectedThread;
private ArrayList<BluetoothDevice> mDeviceList = new ArrayList<BluetoothDevice>();
private DrawerLayout mDrawerLayout;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
Button btnOn, btnOff;
// SPP UUID service
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// MAC-address of Bluetooth module (you must edit this line)
private static String address ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
on = (Button) findViewById(R.id.btn_enable);
find = (Button) findViewById(R.id.btn_scan);
mPairedBtn = (Button) findViewById(R.id.btn_view_paired);
BA = BluetoothAdapter.getDefaultAdapter();
mProgressDlg = new ProgressDialog(this);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
actionBar.setHomeAsUpIndicator(R.drawable.ic_menu);
actionBar.setDisplayHomeAsUpEnabled(true);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
NavigationView navigationView = (NavigationView) findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
menuItem.setChecked(true);
mDrawerLayout.closeDrawers();
Toast.makeText(MainActivity.this, menuItem.getTitle(), Toast.LENGTH_LONG).show();
switch (menuItem.getItemId()) {
case R.id.nav_item_colorlight:
Intent color = new Intent(MainActivity.this, HolopickerColor.class);
// color.putExtra("color", ConnectedThread.getInstance());
startActivity(color);
break;
case R.id.nav_item_effectlight:
Intent light = new Intent(MainActivity.this, LightEffect.class);
startActivity(light);
break;
case R.id.nav_item_music:
Intent music = new Intent(MainActivity.this, Music.class);
startActivity(music);
break;
case R.id.nav_item_about:
Intent about = new Intent(MainActivity.this, About.class);
startActivity(about);
break;
}
return true;
}
});
mProgressDlg.setMessage("Scanning...");
mProgressDlg.setCancelable(false);
mProgressDlg.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
BA.cancelDiscovery();
}
});
if (BA == null) {
showUnsupported();
} else {
mPairedBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Set<BluetoothDevice> pairedDevices = BA.getBondedDevices();
if (pairedDevices == null || pairedDevices.size() == 0) {
showToast("No Paired Devices Found");
} else {
ArrayList<BluetoothDevice> list = new ArrayList<BluetoothDevice>();
list.addAll(pairedDevices);
Intent intent = new Intent(MainActivity.this, DeviceListActivity.class);
intent.putParcelableArrayListExtra("device.list", list);
startActivity(intent);
}
}
});
find.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
BA.startDiscovery();
}
});
on.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (BA.isEnabled()) {
BA.disable();
showDisabled();
try
{
btSocket.close();
} catch (IOException e2)
{
//insert code to deal with this
}
} else {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1000);
}
}
});
if (BA.isEnabled()) {
showEnabled();
} else {
showDisabled();
}
}
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver, filter);
btnOn = (Button) findViewById(R.id.btnOn);
btnOff = (Button) findViewById(R.id.btnOff);
// Set up onClick listeners for buttons to send 1 or 0 to turn on/off LED
btnOff.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
/* r = 255;
g = 15;
b = 50;
mConnectedThread.write("r"+Integer.toString(r)+"\n"); // Send "0" via Bluetooth
mConnectedThread.write("g"+Integer.toString(g)+"\n");
mConnectedThread.write("b"+Integer.toString(b)+"\n");*/
ConnectedThread.getInstance().write("1");
Toast.makeText(getBaseContext(), "Turn off LED", Toast.LENGTH_SHORT).show();
}
});
btnOn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//cathode nen 1 la off, o la on
ConnectedThread.getInstance().write("0"); // Send "1" via Bluetooth //gui nhan ne
Toast.makeText(getBaseContext(), "Turn on LED", Toast.LENGTH_SHORT).show();
}
});
//Get MAC address from DeviceListActivity via intent
// Intent intent = getIntent();
//Get the MAC address from the DeviceListActivty via EXTRA
//address = intent.getStringExtra(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
// MAC-address of Bluetooth module (you must edit this line)
address = "30:14:10:09:07:86";
//create device and set the MAC address
BluetoothDevice device = BA.getRemoteDevice(address);
try {
btSocket = createBluetoothSocket(device);
} catch (IOException e) {
Toast.makeText(getBaseContext(), "Socket creation failed", Toast.LENGTH_LONG).show();
}
// Establish the Bluetooth socket connection.
try
{
btSocket.connect();
} catch (IOException e) {
try
{
btSocket.close();
} catch (IOException e2)
{
//insert code to deal with this
}
}
ConnectedThread.createInstance(btSocket);
ConnectedThread.getInstance().start();
//I send a character when resuming.beginning transmission to check device is connected
//If it is not an exception will be thrown in the write method and finish() will be called
}
private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
return device.createRfcommSocketToServiceRecord(MY_UUID);
//creates secure outgoing connecetion with BT device using UUID
}
#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();
switch (id) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START);
return true;
}
return super.onOptionsItemSelected(item);
}
public void onPause() {
if (BA != null) {
if (BA.isDiscovering()) {
BA.cancelDiscovery();
}
}
try
{
//Don't leave Bluetooth sockets open when leaving activity
btSocket.close();
} catch (IOException e2) {
//insert code to deal with this
}
super.onPause();
}
#Override
public void onDestroy() {
unregisterReceiver(mReceiver);
super.onDestroy();
}
private void showEnabled() {
Toast.makeText(getApplicationContext(), "on", Toast.LENGTH_LONG).show();
on.setText("Disable");
on.setEnabled(true);
mPairedBtn.setEnabled(true);
find.setEnabled(true);
}
private void showDisabled() {
Toast.makeText(getApplicationContext(), "off", Toast.LENGTH_LONG).show();
on.setText("Enable");
on.setEnabled(true);
mPairedBtn.setEnabled(false);
find.setEnabled(false);
}
private void showUnsupported() {
Toast.makeText(getApplicationContext(), "Bluetooth is unsupported by this device", Toast.LENGTH_LONG).show();
on.setText("Enable");
on.setEnabled(false);
mPairedBtn.setEnabled(false);
find.setEnabled(false);
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
if (state == BluetoothAdapter.STATE_ON) {
showToast("Enabled");
showEnabled();
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
mDeviceList = new ArrayList<BluetoothDevice>();
mProgressDlg.show();
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
mProgressDlg.dismiss();
Intent newIntent = new Intent(MainActivity.this, DeviceListActivity.class);
newIntent.putParcelableArrayListExtra("device.list", mDeviceList);
startActivity(newIntent);
} else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
mDeviceList.add(device);
showToast("Found device " + device.getName());
}
}
};
Second activity :
public class HolopickerColor extends AppCompatActivity implements ColorPicker.OnColorChangedListener {
private TextView text;
com.larswerkman.holocolorpicker.ColorPicker picker;
SVBar svBar ;
Button test;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_holopicker_color);
picker = (ColorPicker) findViewById(R.id.picker);
svBar = (SVBar) findViewById(R.id.svbar);
text = (TextView) findViewById(R.id.color1);
picker.addSVBar(svBar);
picker.getColor();
picker.setOnColorChangedListener(this);
picker.setShowOldCenterColor(false);// Tat mau cu
test = (Button)findViewById(R.id.test);
test.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
ConnectedThread.getInstance().write("r255\n");
Toast.makeText(getBaseContext(),"yes",Toast.LENGTH_LONG).show();
}
});
//ConnectedThread.getInstance().start();
}
public void onColorChanged(int color) {
// TODO Auto-generated method stub
text.setTextColor(color);//hien mau len chu
if (ConnectedThread.getInstance() != null) {
int r = (color >> 16) & 0xFF;//xuat kieu mau ra thanh chu
int g = (color >> 8) & 0xFF;
int b = (color >> 0) & 0xFF;
// mTcpClient.sendMessage(Integer.toHexString(picker.getColor()));
ConnectedThread.getInstance().write("r255");//gui ko nhan ne
Here is the ConnectedThread :
class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final OutputStream mmOutStream; // cai nay e can implement Serializable nua
private static ConnectedThread instance = null;
private ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
OutputStream tmpOut = null;
// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpOut = socket.getOutputStream();
} catch (IOException e) { }
mmOutStream = tmpOut;
}
public static void createInstance(BluetoothSocket socket) {
if (instance == null) {
instance = new ConnectedThread(socket);
}
}
public static ConnectedThread getInstance() {
return instance;
}
//write method
public void write(String input) {
byte[] msgBuffer = input.getBytes(); //converts entered String into bytes
try {
mmOutStream.write(msgBuffer); //write bytes over BT connection via outstream
} catch (IOException e) {
cancel();
}
}
/* Call this from the main activity to shutdown the connection */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}

The problem is that you are creating your ConnectedThread singleton instance using a BluetoothSocket, and then you close that same socket in the onPause method of your activity. So basically, after onPause has been called, the ConnectedThread instance cannot send anything anymore. Instead of this you should have ConnectedThread manage the socket, i.e. keep a reference to it and then close it when you no longer need it or have detected a problem.
By the way, each time you call write on ConnectedThread after the socket is closed, your cancel method is called. You would have been able to easily detect the problem if you were not silencing exceptions in this method. This is why you should never have an empty catch block.

Issues with stopping MediaPlayer

My application contains one mediaplayer with one (play/pause) button in audio.xml , but the problem is that I am not able to find right code to stop MediaPlayer before the page gets destroyed and because of that the app crashes when i log in audio page (xml) and quit without running mediaplayer , here is the code i used:
public class audio extends Langue implements Runnable,
OnClickListener, OnSeekBarChangeListener {
private SeekBar seekBar;
private Button startMedia;
// private Button stopMedia;
private MediaPlayer mp;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.audio);
seekBar = (SeekBar) findViewById(R.id.seekBar1);
startMedia = (Button) findViewById(R.id.button1);
//stopMedia = (Button) findViewById(R.id.button2);
startMedia.setOnClickListener(this);
//stopMedia.setOnClickListener(this);
seekBar.setOnSeekBarChangeListener(this);
seekBar.setEnabled(false);
}
public void run() {
int currentPosition = mp.getCurrentPosition();
int total = mp.getDuration();
while (mp != null && currentPosition < total) {
try {
Thread.sleep(1000);
currentPosition = mp.getCurrentPosition();
} catch (InterruptedException e) {
return;
} catch (Exception e) {
return;
}
seekBar.setProgress(currentPosition);
}
}
public void onClick(View v) {
if (v.equals(startMedia)) {
if (mp == null) {
mp = MediaPlayer.create(getApplicationContext(), R.raw.espoir);
seekBar.setEnabled(true);
}
if (mp.isPlaying()) {
mp.pause();
startMedia.setText("Play");
} else {
mp.start();
startMedia.setText("Pause");
seekBar.setMax(mp.getDuration());
new Thread(this).start();
}
}
/* if (v.equals(stopMedia) && mp != null) {
if (mp.isPlaying() || mp.getDuration() > 0) {
mp.stop();
mp = null;
startMedia.setText("Play");
seekBar.setProgress(0);
}
}
*/
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
try {
if (mp.isPlaying() || mp != null) {
if (fromUser)
mp.seekTo(progress);
} else if (mp == null) {
Toast.makeText(getApplicationContext(), "Media is not running",
Toast.LENGTH_SHORT).show();
seekBar.setProgress(0);
}
} catch (Exception e) {
Log.e("seek bar", "" + e);
seekBar.setEnabled(false);
}
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
this.finish();
return true;
}
return super.onOptionsItemSelected(item);
}
// stop song
#Override
protected void onPause(){
super.onPause();
mp.stop();
finish();
}
}

Do something like this into the onPause() method for preventing crash
try{
mp.stop();
} catch(Exception e) {
}
finish();

stop background sound of android audio player

I'm playing sound in android audio player activity. when i pause that activity, the sound keep on playing in background. I want to stop that sound when i resume that audio player activity.
here is my code..
can anyone help how i could do this.any help would be much appreciated, thank you :)
public class AndroidBuildingMusicPlayerActivity extends Activity implements
OnCompletionListener, SeekBar.OnSeekBarChangeListener {
private ImageButton btnPlay;
private ImageButton btnForward;
private ImageButton btnBackward;
// private ImageButton btnNext;
// private ImageButton btnPrevious;
// private ImageButton btnPrevious;
private ImageButton btnPlaylist;
private ImageView songimg;
// private ImageButton btnRepeat;
// private ImageButton btnShuffle;
private SeekBar songProgressBar;
private TextView songTitleLabel;
private TextView songCurrentDurationLabel;
private TextView songTotalDurationLabel;
// Media Player
private MediaPlayer mp;
// Handler to update UI timer, progress bar etc,.
private Handler mHandler = new Handler();;
private SongsManager songManager;
private Utilities utils;
private int seekForwardTime = 5000; // 5000 milliseconds
private int seekBackwardTime = 5000; // 5000 milliseconds
private int currentSongIndex = 0;
private boolean isShuffle = false;
private boolean isRepeat = false;
private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
String[] stringArray = new String[4];
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mediaplayer);
// All player buttons
btnPlay = (ImageButton) findViewById(R.id.btnPlay);
btnForward = (ImageButton) findViewById(R.id.btnForward);
btnBackward = (ImageButton) findViewById(R.id.btnBackward);
// btnNext = (ImageButton) findViewById(R.id.btnNext);
// btnPrevious = (ImageButton) findViewById(R.id.btnPrevious);
btnPlaylist = (ImageButton) findViewById(R.id.btnPlaylist);
songimg = (ImageView) findViewById(R.id.songimg);
// btnShuffle = (ImageButton) findViewById(R.id.btnShuffle);
btnPlaylist = (ImageButton) findViewById(R.id.btnPlaylist);
songProgressBar = (SeekBar) findViewById(R.id.songProgressBar);
songTitleLabel = (TextView) findViewById(R.id.songTitle);
songCurrentDurationLabel = (TextView) findViewById(R.id.songCurrentDurationLabel);
songTotalDurationLabel = (TextView) findViewById(R.id.songTotalDurationLabel);
// Mediaplayer
mp = new MediaPlayer();
songManager = new SongsManager();
utils = new Utilities();
// Listeners
songProgressBar.setOnSeekBarChangeListener(this); // Important
mp.setOnCompletionListener(this); // Important
// Getting all songs list
songsList = songManager.getPlayList();
final String[] stringArray = getIntent().getStringArrayExtra("string-array");
// By default play first song
playSong(stringArray[0]);
songTitleLabel.setText(stringArray[1]);
new DownloadImageTask(songimg).execute(stringArray[2]);
btnPlaylist.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
final String[] option = new String[] {"Share",
"Stop" };
ArrayAdapter<String> adapters = new ArrayAdapter<String>(
AndroidBuildingMusicPlayerActivity.this,
android.R.layout.select_dialog_item, option);
AlertDialog.Builder builder = new AlertDialog.Builder(
AndroidBuildingMusicPlayerActivity.this);
builder.setTitle("Choose Action");
builder.setAdapter(adapters,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
if (which == 1) {
mp.stop();
finish();
}
if (which == 0) {
Intent browserIntent = new Intent(
Intent.ACTION_SEND);
browserIntent.setType("text/plain");
browserIntent.putExtra(
android.content.Intent.EXTRA_TEXT,
stringArray[3]);
// ,
// Uri.parse("https://www.youtube.com/watch?v="+ids.get(mPosition)));
startActivity(Intent.createChooser(
browserIntent, "Share Song Link"));
}
}
});
final AlertDialog dialog = builder.create();
dialog.show();
}
});
/**
* Play button click event plays a song and changes button to pause
* image pauses a song and changes button to play image
* */
btnPlay.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// check for already playing
if (mp.isPlaying()) {
if (mp != null) {
mp.pause();
// Changing button image to play button
btnPlay.setImageResource(R.drawable.btn_play);
}
} else {
// Resume song
if (mp != null) {
mp.start();
// Changing button image to pause button
btnPlay.setImageResource(R.drawable.btn_pause);
}
}
}
});
/**
* Forward button click event Forwards song specified seconds
* */
btnForward.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// get current song position
int currentPosition = mp.getCurrentPosition();
// check if seekForward time is lesser than song duration
if (currentPosition + seekForwardTime <= mp.getDuration()) {
// forward song
mp.seekTo(currentPosition + seekForwardTime);
} else {
// forward to end position
mp.seekTo(mp.getDuration());
}
}
});
/**
* Backward button click event Backward song to specified seconds
* */
btnBackward.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// get current song position
int currentPosition = mp.getCurrentPosition();
// check if seekBackward time is greater than 0 sec
if (currentPosition - seekBackwardTime >= 0) {
// forward song
mp.seekTo(currentPosition - seekBackwardTime);
} else {
// backward to starting position
mp.seekTo(0);
}
}
});
}
/**
* Receiving song index from playlist view and play the song
* */
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == 100) {
currentSongIndex = data.getExtras().getInt("songIndex");
// play selected song
playSong(stringArray[0]);
}
}
/**
* Function to play a song
*
* #param songIndex
* - index of song
* */
public void playSong(String songpath) {
// Play song
try {
mp.reset();
mp.setDataSource(songpath);
mp.prepare();
mp.start();
// Displaying Song title
// String songTitle = songsList.get(songIndex).get("songTitle");
// songTitleLabel.setText(songTitle);
// Changing Button Image to pause image
btnPlay.setImageResource(R.drawable.btn_pause);
// set Progress bar values
songProgressBar.setProgress(0);
songProgressBar.setMax(100);
// Updating progress bar
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Update timer on seekbar
* */
public void updateProgressBar() {
mHandler.postDelayed(mUpdateTimeTask, 100);
}
/**
* Background Runnable thread
* */
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
long totalDuration = mp.getDuration();
long currentDuration = mp.getCurrentPosition();
// Displaying Total Duration time
songTotalDurationLabel.setText(""
+ utils.milliSecondsToTimer(totalDuration));
// Displaying time completed playing
songCurrentDurationLabel.setText(""
+ utils.milliSecondsToTimer(currentDuration));
// Updating progress bar
int progress = (int) (utils.getProgressPercentage(currentDuration,
totalDuration));
// Log.d("Progress", ""+progress);
songProgressBar.setProgress(progress);
// Running this thread after 100 milliseconds
mHandler.postDelayed(this, 100);
}
};
/**
*
* */
#Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromTouch) {
}
/**
* When user starts moving the progress handler
* */
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
// remove message Handler from updating progress bar
mHandler.removeCallbacks(mUpdateTimeTask);
}
/**
* When user stops moving the progress hanlder
* */
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
mHandler.removeCallbacks(mUpdateTimeTask);
int totalDuration = mp.getDuration();
int currentPosition = utils.progressToTimer(seekBar.getProgress(),
totalDuration);
// forward or backward to certain seconds
mp.seekTo(currentPosition);
// update timer progress again
updateProgressBar();
}
/**
* On Song Playing completed if repeat is ON play same song again if shuffle
* is ON play random song
* */
#Override
public void onCompletion(MediaPlayer arg0) {
// check for repeat is ON or OFF
if (isRepeat) {
// repeat is on play same song again
playSong(stringArray[0]);
} else if (isShuffle) {
// shuffle is on - play a random song
Random rand = new Random();
currentSongIndex = rand.nextInt((songsList.size() - 1) - 0 + 1) + 0;
playSong(stringArray[0]);
} else {
// no repeat or shuffle ON - play next song
if (currentSongIndex < (songsList.size() - 1)) {
playSong(stringArray[0]);
currentSongIndex = currentSongIndex + 1;
} else {
// play first song
playSong(stringArray[0]);
currentSongIndex = 0;
}
}
}
#Override
public void onDestroy() {
super.onDestroy();
//mp.stop();
}
class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
// pd.show();
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
#Override
protected void onPostExecute(Bitmap result) {
super.onPostExecute(result);
// pd.dismiss();
bmImage.setImageBitmap(result);
}
}
}

Try: Override onStop() and onRestart()
#Override
protected void onStop() {
super.onStop();
if (mp.isPlaying()) {
mp.stop();
// or mp.pause();
}
}
#Override
public void onRestart() {
super.onRestart();
if (mp == null) {
//create mp from current song, for example
mp = MediaPlayer.create(AndroidBuildingMusicPlayerActivity.this, currentSong);
}
mp.start();
}
EDIT:
try:
#Override
protected void onPause() {
super.onPause();
try{
if (mp.isPlaying()) {
mp.pause();
}
}catch(Exception we){
we.printStackTrace();
}
}
#Override
protected void onResume() {
super.onResume();
try{
mp.start();
}catch(Exception we){
we.printStackTrace();
}
}

you should use AUDIO FOCUS and onfocuschangelistener it will solve your problem.