Android MediaPlayer OnCompletion NullPointerException - java

This is my first question. It is giving NullPointerException in media.release() line. Exact output is NullPointerException (#ProgressDetailRecyclerViewAdapter$5:onCompletion:308) {main}
public void play(String fileURL) {
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(fileURL);
mediaPlayer.prepare();
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mediaPlayer.release(); //line 308
mediaPlayer = null;
}
});
} catch (Exception e) {
e.printStackTrace();
}
}

#Override
public void onCompletion(MediaPlayer **mp**) {
**mediaPlayer**.release(); //line 308
mediaPlayer = null;
}
use the right object mp instead of mediaPlayer inside this method

Try this
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp.release(); //line 308
mp= null;
}
});

The variable that gets passed to your onCompletion method is named mp, not mediaPlayer. It's possible your mediaPlayer variable has been nulled since it was initialized, causing the error. Change the code to:
#Override
public void onCompletion(MediaPlayer mp) {
mp.release(); //line 308
mp = null;
}

Related

MediaPlayer setDatasource gives error even though i am doing mediaplayer.reset whenever i click on any song the setdatasource behaves wierdly

Help me I am stuck on this, mediaPlayer.setDataSource() is giving error when clicking on any song list in recycler view. I am new to Android Studio as I have started it past year.
Here is the video of what is happening in my app
java.lang.IllegalStateException
at android.media.MediaPlayer._setDataSource(Native Method)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1296)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1279)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1261)
at android.media.MediaPlayer.attemptDataSource(MediaPlayer.java:1155)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1112)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1019)
at com.example.musify.MainActivity$10.run(MainActivity.java:454)
at java.lang.Thread.run(Thread.java:919)**
Always getting error in onchanged method setDataSource:
#Override
public void onChanged(int position) {
currentSongNumber = position;
CreateNotification.createNotification(MainActivity.this,musicLists.get(currentSongNumber),R.drawable.ic_baseline_pause_24,currentSongNumber,musicLists.size()-1);
if(mediaPlayer.isPlaying())
{
mediaPlayer.pause();
mediaPlayer.stop();
}
new Thread(new Runnable() {
#Override
public void run() {
try {
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//this is the place where i am getting error although i have reset on instance of mediaplayer
mediaPlayer.setDataSource(MainActivity.this, musicLists.get(currentSongNumber).getMusicFile());
MainActivity.this.runOnUiThread(() -> {
// musicbar_artist.setText(musicLists.get(currentSongNumber).getArtist());
musicbar_name.setText(musicLists.get(currentSongNumber).getTitle());
});
} catch (IOException e) {
new Handler(Looper.getMainLooper()).post(() -> Toast.makeText(MainActivity.this, "Unable to Play Track!", Toast.LENGTH_SHORT).show());
e.printStackTrace();
}
try {
mediaPlayer.prepare();
mediaPlayer.start();
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
final int getTotalDuration = mp.getDuration();
String generateDuration = String.format(Locale.getDefault(),"%02d:%02d",
TimeUnit.MILLISECONDS.toMinutes(getTotalDuration),
TimeUnit.MILLISECONDS.toSeconds(getTotalDuration)-
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(getTotalDuration)));
endTime.setText(generateDuration);
isPlaying = true;
mp.start();
playSeekbar.setMax(getTotalDuration);
playpauseImage.setImageResource(R.drawable.pause_svg);
}
});
timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
#Override
public void run() {
final int getCurrentDuration = mediaPlayer.getCurrentPosition();
String generateDuration = String.format(Locale.getDefault(),"%02d:%02d",
TimeUnit.MILLISECONDS.toMinutes(getCurrentDuration),
TimeUnit.MILLISECONDS.toSeconds(getCurrentDuration)-
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(getCurrentDuration)));
playSeekbar.setProgress(getCurrentDuration);
startTime.setText(generateDuration);
}
});
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mediaPlayer.reset();
String tm = "00:00";
startTime.setText(tm);
timer.purge();
timer.cancel();
isPlaying = false;
playpauseImage.setImageResource(R.drawable.ic_baseline_play_arrow_24);
playSeekbar.setProgress(0);
musicAdapater.update(musicLists);
musicRecyclerV.scrollToPosition(0);
// starts next music
onNext();
}
});
}
},1000,1000);
}
#Override
public void onPlay() {
CreateNotification.createNotification(MainActivity.this,musicLists.get(currentSongNumber),R.drawable.ic_baseline_pause_24,currentSongNumber,musicLists.size()-1);
isPlaying = true;
playpauseImage.setImageResource(R.drawable.pause_svg);
mediaPlayer.start();
musicLists.get(currentSongNumber).setPlaying(true);
musicbar_name.setText(musicLists.get(currentSongNumber).getTitle());
// musicbar_artist.setText(musicLists.get(currentSongNumber).getArtist());
musicAdapater.update(musicLists);
musicRecyclerV.scrollToPosition(currentSongNumber);
onChanged(currentSongNumber);
}
#Override
public void onPrev() {
int prevsongnumber = currentSongNumber-1;
if(prevsongnumber<0)
{
prevsongnumber = musicLists.size()-1;
}
CreateNotification.createNotification(MainActivity.this,musicLists.get(prevsongnumber),R.drawable.ic_baseline_pause_24,prevsongnumber,musicLists.size()-1);
musicLists.get(currentSongNumber).setPlaying(false);
musicLists.get(prevsongnumber).setPlaying(true);
musicbar_name.setText(musicLists.get(prevsongnumber).getTitle());
// musicbar_artist.setText(musicLists.get(prevsongnumber).getArtist());
musicAdapater.update(musicLists);
musicRecyclerV.scrollToPosition(prevsongnumber);
onChanged(prevsongnumber);
}
#Override
public void onPaused() {
CreateNotification.createNotification(MainActivity.this,musicLists.get(currentSongNumber),R.drawable.ic_baseline_play_arrow_24,currentSongNumber,musicLists.size()-1);
isPlaying = false;
mediaPlayer.pause();
playpauseImage.setImageResource(R.drawable.ic_baseline_play_arrow_24);
}
#Override
public void onNext() {
int nextsongnumber = currentSongNumber+1;
if(nextsongnumber>=musicLists.size())
{
nextsongnumber = 0;
}
CreateNotification.createNotification(MainActivity.this,musicLists.get(nextsongnumber),R.drawable.ic_baseline_pause_24,nextsongnumber,musicLists.size()-1);
musicLists.get(currentSongNumber).setPlaying(false);
musicLists.get(nextsongnumber).setPlaying(true);
musicbar_name.setText(musicLists.get(nextsongnumber).getTitle());
// musicbar_artist.setText(musicLists.get(nextsongnumber).getArtist());
musicAdapater.update(musicLists);
musicRecyclerV.scrollToPosition(nextsongnumber);
onChanged(nextsongnumber);
}
MediaPlayer.create() is better than setDatasource
got this from a YouTube comment!!
if(mediaPlayer.isPlaying())
{
mediaPlayer.pause();
}
mediaPlayer.stop();
mediaPlayer.release();
// passing applicationContext() and uri file of currentsongnumber
mediaPlayer = MediaPlayer.create(MainActivity.this, musicLists.get(currentSongNumber).getMusicFile());
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
MainActivity.this.runOnUiThread(() -> {
// musicbar_artist.setText(musicLists.get(currentSongNumber).getArtist());
musicbar_name.setText(musicLists.get(currentSongNumber).getTitle());
});
try {
mediaPlayer.prepare();
mediaPlayer.start();
} catch (Exception e) {
e.printStackTrace();
}

JAVA error: "E/MediaPlayer: Error (-38,0)"

I'm having a problem with my radio, the radio works and everything, but the thing is that when I pressed Pause the radio stops, but, when i click on PLAY again, the radio starts again, but like if it where a song. Conclusion (sorry for my bad explanation)
when i use OnPause() this happens
weird example===
if I start playing 1:00pm , and then I paused 1:01pm, then wait a couple minutes, and play again, the radio will continue playing like if it where 1:01pm, and it's 1:05pm (awkward example)
when i changed to OnStop()
it gave me MediaPlayer code error(-38,0)
enter code here :::::: b_play = findViewById(R.id.b_play);
b_play.setEnabled(false);
b_play.setText("Cargando...");
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
new PlayerTask().execute(stream);
b_play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (started) {
started = false;
mediaPlayer.stop();
b_play.setText("Escuchar");
} else {
started = true;
mediaPlayer.start();
b_play.setText("Pausar");
}
}
#Override
protected Boolean doInBackground(String... strings) {
try {
mediaPlayer.setDataSource(strings[0]);
mediaPlayer.prepare();
prepared = true;
} catch (IOException e) {
e.printStackTrace();
}
return prepared;
}
#Override
protected void onPostExecute(Boolean aBoolean) {
super.onPostExecute(aBoolean);
mediaPlayer.start();
b_play.setEnabled(true);
b_play.setText("Escuchar");
}
}
#Override
protected void onPause() {
super.onStop();
if (started) {
mediaPlayer.stop();
}
}
#Override
protected void onResume() {
super.onResume();
if (started) {
mediaPlayer.start();
}
}
#Override
protected void onDestroy() {
super.onDestroy();
if (prepared) {
mediaPlayer.release();
}
}
If u could help me out, i'll do apprecciate, I'm sorry about my english and weird explanation (?
remove onPause with onStop
#Override
protected void onStop() {
super.onStop();
if (started) {
mediaPlayer.stop();
}
}
#Override
protected void onResume() {
super.onResume();
if (started) {
mediaPlayer.start();
}
}
#Override
protected void onDestroy() {
super.onDestroy();
if (prepared) {
mediaPlayer.release();
}
}

Media Player error in RecyclerView

i have a RecyclerView that displays a list of songs and i have successfully implemented on click listener with it and verified it with logs. Now i want to play the song upon click event. When i first click on a item the songs starts to play but if i then tap on any other item the app simply crashes
Here is my RecyclerViewClickListener
SongAdapter songAdapter = new SongAdapter(getContext(), songsList, new RecyclerViewClickListener() {
#Override
public void onClick(View view, int position) {
Toast.makeText(getContext(), "You clicked on Ssong "+songsList.get(position).getSongName(), Toast.LENGTH_SHORT)
.show();
songPath = songsList.get(position).getUrl();
Log.v("Song Path", songPath);
if(mp.isPlaying())
releaseMediaResources();
playSong();
}
});
recyclerView.setAdapter(songAdapter);
Here is my playSong method
private void playSong () {
if(!songPath.equals("")) {
try {
mp.setDataSource(songPath);
} catch (Exception e) {
Log.e("Home Fragment", "Error setting song Url", e);
}
mp.prepareAsync();
mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
mp.stop();
mp.reset();
mp.release();
}
});
}
}
And here is my releaseMediaResources
private void releaseMediaResources() {
mp.stop();
mp.reset();
mp.release();
}
These are the errors
java.lang.IllegalStateException
at android.media.MediaPlayer.isPlaying(Native Method)
at com.ashutosh.prototype4.HomeFragment.playSong(HomeFragment.java:159)
at com.ashutosh.prototype4.HomeFragment.releaseMediaResources(HomeFragment.java:192)
at com.ashutosh.prototype4.HomeFragment.access$100(HomeFragment.java:31)
at com.ashutosh.prototype4.HomeFragment$2.onClick(HomeFragment.java:94)
at com.ashutosh.prototype4.SongAdapter$1.onClick(SongAdapter.java:50)
According to me the main problem lies in setting up the media player because when i display only toast messages there's no issues at all but as soon as i implement media player to on click method the crash occurs
I will create every time the new MediaPlayer, but of course try to check, if there is not already existing instance for instance:
private MediaPlayer mediaPlayer;
private void playSong(String filePath) {
if (mediaPlayer != null && mediaPlayer.isPlaying()){
mediaPlayer.stop();
}
mediaPlayer = MediaPlayer.create(getActivity(), Uri.parse(filePath));
mediaPlayer.setVolume(DEFAULT_VOLUME_MUSIC, DEFAULT_VOLUME_MUSIC);
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
}
});
}

Android mediaPlayer service not working

im trying to play 1 of 2 sounds , correct.mp3 or incorrect.mp3, which is stored in my assets folder. This is the code for my service:
public class MinesweeperSound extends Service {
MediaPlayer player;
public int onStartCommand(Intent intent, int flags, int startId) {
try {
String audioFile = null;
audioFile = intent.getStringExtra("filename");
AssetFileDescriptor afd = getAssets().openFd(audioFile);
player = new MediaPlayer();
player.setDataSource(afd.getFileDescriptor());
player.prepare();
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mediaPlayer.start();
}
});
player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.release();
}
});
}catch (IOException e){
e.printStackTrace();
}
return Service.START_STICKY;
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
}
here is how i call it in Activity:
Intent correctIntent = new Intent(getApplicationContext(), MinesweeperSound.class);
correctIntent.putExtra("filename", "correct.mp3");
startService(correctIntent);
for some reason it is not playing any sound, any help is good, thanks
You should set on prepare listener before calling prepare
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { #Override public void onPrepared(MediaPlayer mediaPlayer) { mediaPlayer.start(); } });
player.prepare();
MediaPlayer.prepare() is a synchronous method. If you use it then you dont need a onPrepareListener.
Otherwise use
prepareAsync()
instead of
prepare()
i finally figured it out. I needed to add parameters to the .setDataSource method. here is the working code:
MediaPlayer player = null;
public int onStartCommand(Intent intent, int flags, int startId){
try {
String audioFile = null;
audioFile = intent.getStringExtra(PowerUpUtils.MINESWEEPER_TILE_RESULT);
AssetFileDescriptor afd = getBaseContext().getAssets().openFd(audioFile);
player = new MediaPlayer();
player.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
player.prepare();
}catch (IOException e){
e.printStackTrace();
}
player.start();
return Service.START_STICKY;
}
also, calling start() after the try-catch block seemed to be part of the fix.

Android Mediaplayer Error (-19, 0)

I try to replay a sound when I click on a button. But I get the Error (-19, 0) (what ever this means^^)
My code:
final Button xxx = (Button)findViewById(R.id.xxx);
xxx.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
MediaPlayer mp = MediaPlayer.create(getApplicationContext(), R.raw.plop);
mp.start();
}
});
What is my mistake?
I was getting the same problem, I solved it by adding the following code:
mp1 = MediaPlayer.create(sound.this, R.raw.pan1);
mp1.start();
mp1.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mp) {
mp.release();
};
});
You need to release the previous media player before starting the new one.
Declare MediaPlayer as a instance variable and then:
mp = null;
final Button xxx = (Button)findViewById(R.id.xxx);
xxx.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (mp != null) {
mp.stop();
mp.release();
}
mp = MediaPlayer.create(getApplicationContext(), R.raw.plop);
mp.start();
}
});
Or in your case, since you always play the same sound you don't need to release the player and create a new one, simply reuse the old one.
final MediaPlayer mp = MediaPlayer.create(getApplicationContext(), R.raw.plop);
mp.prepare(); // Blocking method. Consider to use prepareAsync
final Button xxx = (Button)findViewById(R.id.xxx);
xxx.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
mp.stop();
mp.start();
}
});
I sloved this problem by this code:
public static void playSound() {
mMediaPlayer = new MediaPlayer();
try {
AssetFileDescriptor afd = context.getAssets().openFd("type.mp3");
mMediaPlayer.setDataSource(afd.getFileDescriptor(),
afd.getStartOffset(), afd.getLength());
mMediaPlayer.prepare();
mMediaPlayer.start();
mMediaPlayer.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer arg0) {
// TODO Auto-generated method stub
arg0.release();
}
});
} catch (IllegalArgumentException | IllegalStateException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
i hope to help you.

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