changing a track media player android
https://stackoverflow.com/questions/12214718
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29-06-2021 - |
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I am currently playing a song using MediaPlayer which plays fine. On user selecting a different song, I'm trying to play that out. But, I get error(1,-2147483648) and Error(1, -2147483648) by the MediaPlayer. These logs are printed after the call to prepareASync(); Note: The path of the file looks correct. However, how do I check for a valid filepath?
The sequence is as follows:
mPlayer.reset();
Log.d(TAG,"after reset");
mPlayer.setDataSource(mTrackToBePlayed);
Log.d(TAG,"after setDataSource");
// mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mPlayer.setOnPreparedListener(preparedListener);
Log.d(TAG,"after setOnPreparedListener");
mPlayer.setOnErrorListener(errorListener);
Log.d(TAG,"after setting errorListener");
mPlayer.prepareAsync();
Log.d(TAG,"after prepareAsync");
The code for reference is this: in onResume() of my main activity(on returning to which, I want to start playback) I am making the calls MusicUtils.createPlayer(); and MusicUtils.playTrack(mCurrentTrack);
public static void playTrack(String track) {
mTrackToBePlayed = track;
try {
mPlayer.reset();
Log.d(TAG,"after reset");
mPlayer.setDataSource(mTrackToBePlayed);
Log.d(TAG,"after setDataSource");
// mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mPlayer.setOnPreparedListener(preparedListener);
Log.d(TAG,"after setOnPreparedListener");
mPlayer.setOnErrorListener(errorListener);
Log.d(TAG,"after setting errorListener");
mPlayer.prepareAsync();
Log.d(TAG,"after prepareAsync");
} catch (IOException e) {
} catch(IllegalArgumentException e) {
}
preparedListener = new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
mp.start();
Log.d(TAG,"after start");
}
};
errorListener = new MediaPlayer.OnErrorListener() {
public boolean onError(MediaPlayer mp, int what, int extra) {
switch (what) {
case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
Log.d(TAG,"in onError");
// mIsInitialized = false;
mp.release();
// Creating a new MediaPlayer and settings its wakemode does not
// require the media service, so it's OK to do this now, while the
// service is still being restarted
try{
mp = new MediaPlayer();
mp.reset();
mp.setDataSource(mTrackToBePlayed);
// mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.prepareAsync();
mPlayer = mp;
// mPlayer.start();
} catch (Exception e) {
}
//MediaPlayer.create(mContext, mTrackToBePlayed);
// mPlayer.setWakeMode(MediaPlaybackService.this, PowerManager.PARTIAL_WAKE_LOCK);
return true;
default:
Log.d("MusicPlayer", "Error: " + what + "," + extra);
break;
}
return false;
}
};
//mPlayer.start();
}
public static boolean isPlaying() {
return mPlayer.isPlaying();
}
public static void pauseTrack() {
mPlayer.pause();
}
public static void startTrack() {
mPlayer.start();
}
public static void stopTrack() {
mPlayer.stop();
}
public static void releasePlayer() {
mPlayer.release();
}
This function is present in MusicUtils and is used to obtain the first track that the cursor returns
public static void retrieveDefaultPath() {
String[] STAR = { "*" };
Uri allsongsuri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";
mCursor = mContentResolver.query(allsongsuri, STAR, selection, null, null);
if (mCursor != null) {
if (mCursor.moveToFirst()) {
//do {
//mSongName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));
//mSongList.add(mSongName);//populate the list of display names
int song_id = mCursor.getInt(mCursor.getColumnIndex(MediaStore.Audio.Media._ID));
//mMusicIDs.put(song_id, counter++);//fill the HashMap with IDs corresponding to the positions
String fullpath = mCursor.getString(mCursor.getColumnIndex(MediaStore.Audio.Media.DATA));
String album_name = mCursor.getString(mCursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
int album_id = mCursor.getInt(mCursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));
String artist_name = mCursor.getString(mCursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
int artist_id = mCursor.getInt(mCursor.getColumnIndex(MediaStore.Audio.Media.ARTIST_ID));
//} while (cursor.moveToNext());
mDefaultPath = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI + "/" + song_id;
Slideshow.mCurrentTrack = mDefaultPath;
}
if (mCursor != null) {
mCursor.close();
}
}
}
The following function is used to obtain all the tracks on the device to display using the ListActivity.
public void getAllSongsFromSDCARD() {
String[] STAR = { "*" };
Uri allsongsuri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";
cursor = managedQuery(allsongsuri, STAR, selection, null, null);
if (cursor != null) {
if (cursor.moveToFirst()) {
do {
mSongName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));
mSongList.add(mSongName);//populate the list of display names
int song_id = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media._ID));
Log.d("Music List","ID: "+song_id+" counter:"+counter);
mMusicIDs.put(counter++, song_id);//fill the HashMap with IDs corresponding to the positions
String fullpath = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
String album_name = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
int album_id = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));
String artist_name = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
int artist_id = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST_ID));
} while (cursor.moveToNext());
}
cursor.close();
}
}
I use the ID that the user selects and obtain the filepath in the following way:
music_id = (Integer)mMusicIDs.get(position);
mSelectedPath = mSelectedPath + "/" + music_id;
Logcat:
08-31 18:07:36.348: D/dalvikvm(23090): GC_EXTERNAL_ALLOC freed 2K, 46% free 3088K/5703K, external 1461K/1538K, paused 32ms
08-31 18:07:38.860: D/tag(23090): inside oncreate
08-31 18:07:38.860: D/ImageSwitcher(23090): cache size:1
08-31 18:07:39.030: D/ImageSwitcher(23090): TOTAL NUM IMAGES: 838
08-31 18:07:39.150: I/AudioSystem(23090): getting audio flinger
08-31 18:07:39.150: I/AudioSystem(23090): returning new audio session id
08-31 18:07:39.150: D/IAudioFlinger(23090): newAudioSessionId In
08-31 18:07:39.150: D/IAudioFlinger(23090): newAudioSessionId Out, id = 175
08-31 18:07:39.150: D/MediaPlayer(23090): reset() in
08-31 18:07:39.150: D/MediaPlayer(23090): reset() out
08-31 18:07:39.150: D/MusicUtils(23090): after reset
08-31 18:07:39.160: D/MusicUtils(23090): after setDataSource
08-31 18:07:39.160: D/MusicUtils(23090): after setOnPreparedListener
08-31 18:07:39.160: D/MusicUtils(23090): after setting errorListener
08-31 18:07:39.170: D/MusicUtils(23090): after prepareAsync
08-31 18:07:39.250: D/MediaPlayer(23090): start() in
08-31 18:07:39.260: D/MediaPlayer(23090): start() out
08-31 18:07:39.270: D/MediaPlayer(23090): start() in
08-31 18:07:39.270: D/MediaPlayer(23090): start() out
08-31 18:07:39.270: D/MusicUtils(23090): after start
08-31 18:07:49.340: D/MediaPlayer(23090): pause() in
08-31 18:07:49.340: D/MediaPlayer(23090): pause() out 08-31 18:07:49.560: D/dalvikvm(23090): GC_CONCURRENT freed 239K, 45% free 3260K/5831K, external 494K/1006K, paused 10ms+7ms
08-31 18:07:50.842: D/Music List(23090): in onCreate before getAllSongsFromSDCARD
08-31 18:07:50.922: D/TAG(23090): set adapter
08-31 18:07:50.922: D/TAG(23090): set adapter done
08-31 18:07:51.953: D/dalvikvm(23090): GC_EXTERNAL_ALLOC freed 146K, 45% free 3264K/5831K, external 794K/855K, paused 29ms
08-31 18:07:53.905: D/MusicList(23090): after setItemChecked
08-31 18:07:54.585: D/Settings(23090): inside onActivityResult
08-31 18:07:55.476: W/KeyCharacterMap(23090): Can't open keycharmap file
08-31 18:07:55.476: W/KeyCharacterMap(23090): Error loading keycharmap
file '/system/usr/keychars/cy8c-touchscreen.kcm.bin'. hw.keyboards.65538.devname='cy8c-touchscreen' 08-31 18:07:55.476: I/KeyCharacterMap(23090): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
08-31 18:07:55.486: D/MediaPlayer(23090): reset() in
08-31 18:07:55.486: D/MediaPlayer(23090): reset() out
08-31 18:07:55.486: D/MusicUtils(23090): after reset
08-31 18:07:55.486: D/MusicUtils(23090): after setDataSource
08-31 18:07:55.486: D/MusicUtils(23090): after setOnPreparedListener
08-31 18:07:55.486: D/MusicUtils(23090): after setting errorListener
08-31 18:07:55.486: D/MusicUtils(23090): after prepareAsync
08-31 18:07:55.496: E/MediaPlayer(23090): error (1, -2147483648)
08-31 18:07:55.506: E/MediaPlayer(23090): Error (1,-2147483648)
08-31 18:07:55.506: D/MusicPlayer(23090): Error: 1,-2147483648
Solution 2
The sequence is correct. The path was going wrong. A hardcoded string instead of a Uri was being used. Thanks.
OTHER TIPS
**Check with the following class it will list out all th songs in the device also it play the song when click on that name.**
public class NewMp3PlayerActivity extends Activity {
ListView musiclist;
int music_column_index,music_column_index1;
int count;
MediaPlayer mMediaPlayer;
ImageView play, pause, forward, backward;
int pposition;
ArrayList<String> songs = new ArrayList<String>(); String songName; Cursor musiccursor;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.songpreview);
play = (ImageView)findViewById(R.id.img_play);
pause = (ImageView)findViewById(R.id.img_pause);
forward = (ImageView)findViewById(R.id.img_forward);
backward = (ImageView)findViewById(R.id.img_backward);
play.setOnClickListener(OnClick);
pause.setOnClickListener(OnClick);
forward.setOnClickListener(OnClick);
backward.setOnClickListener(OnClick);
init_phone_music_grid();
}
View.OnClickListener OnClick = new View.OnClickListener() {
@Override public void onClick(View v) { music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
Log.e("", "musiccursor.getCount()-->"musiccursor.getCount()); switch(v.getId()){ case R.id.img_play:
Log.v("", "list of songs-->"+songs);
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.reset();
}
mMediaPlayer.start();
break; case R.id.img_pause:
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.pause();
}
break; case R.id.img_forward: // musiccursor.moveToPosition(pposition+1);
try {
String filename="";
if (pposition < songs.size()){
pposition = pposition+1;
filename = songs.get(pposition);//musiccursor.getString(music_column_index);
}else{
}
Log.e("", "filename-->"+filename);
mMediaPlayer.reset();
mMediaPlayer.setDataSource(filename);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch(IndexOutOfBoundsException ie){
pposition = 0;
}
break; case R.id.img_backward:
try {
String filename_n="";
if (pposition <= songs.size()){
pposition = pposition-1;
filename_n = songs.get(pposition);//musiccursor.getString(music_column_index);
}else{
}
mMediaPlayer.reset();
mMediaPlayer.setDataSource(filename_n);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch(ArrayIndexOutOfBoundsException ar){
pposition = songs.size();
}
break; default:
break; }
} };
private void init_phone_music_grid() {
System.gc();
String[] proj = { MediaStore.Audio.Media._ID,MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.DISPLAY_NAME,MediaStore.Video.Media.SIZE };
musiccursor = managedQuery(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, proj, null, null, null);
Log.e("", "filename-->"musiccursor.getCount());
count = musiccursor.getCount();
musiclist = (ListView) findViewById(R.id.lst_music);
musiclist.setAdapter(new MusicAdapter(getApplicationContext()));
musiclist.setOnItemClickListener(musicgridlistener);
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
try {
String filename="";
if (pposition < songs.size()){
pposition = pposition+1;
filename = songs.get(pposition);//musiccursor.getString(music_column_index);
}else{
}
Log.e("", "filename-->"+filename);
mMediaPlayer.reset();
mMediaPlayer.setDataSource(filename);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch(IndexOutOfBoundsException ie){
pposition = 0;
}
} });
}
private OnItemClickListener musicgridlistener = new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position,long id) {
System.gc();
pposition = position;
music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
musiccursor.moveToPosition(position);
String filename = musiccursor.getString(music_column_index);
String filen = songs.get(pposition);
Log.e("", "index-->"+music_column_index);
try {
mMediaPlayer.reset();
mMediaPlayer.setDataSource(filen);
mMediaPlayer.prepare(); // mMediaPlayer.start();
} catch (Exception e) {
}
}
};
public class MusicAdapter extends BaseAdapter {
private Context mContext;
public MusicAdapter(Context c) {
mContext = c;
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
System.gc();
TextView tv = new TextView(mContext.getApplicationContext());
String id = null;
if (convertView == null) {
music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
music_column_index1 = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
musiccursor.moveToPosition(position);
id = musiccursor.getString(music_column_index);
songName = musiccursor.getString(music_column_index);
songs.add( musiccursor.getString(music_column_index1) );
music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE);
musiccursor.moveToPosition(position);
id += " Size(KB):" + musiccursor.getString(music_column_index);
tv.setText(id);
} else
tv = (TextView) convertView;
return tv;
}
} }
