Develop Reference

Android app crashes in 5.0 and above when using MediaPlayer with url

I am developing an android app which play a mp3 songs by using a remote url. everything is working fine in android devices below api 5.0.But when starting app in samsung s5(5.1) it suddenly crashes
mu logcat is giving error "QCmediaPlayer mediaplayer is not present.Here is my code of Media Player
public class MainActivity2 extends Activity implements OnClickListener, OnPreparedListener {
private ProgressBar playSeekBar;
private final static String RADIO_STATION_URL ="https://aryaradio.s3.amazonaws.com/";
private String KEYNAME,encodedurl;
private List<String> playlistarray;
private List<MediaPlayer> mplayerList;
private ImageButton buttonPlay;
private List<S3ObjectSummary> playlist=null;
private ImageButton buttonStopPlay;
ProgressDialog progress;
URL url,currentsongurl;
private MediaPlayer player;
private AmazonS3Client mClient;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_play);
playlistarray=new ArrayList<String>();
mplayerList=new ArrayList<MediaPlayer>();
if(isNetworkAvailable()) {
mClient = Util.getS3Client(MainActivity2.this);
initializeUIElements();
//new RefreshTask().execute();
buttonStopPlay.setVisibility(View.INVISIBLE);
} else {
new AlertDialog.Builder(MainActivity2.this)
.setTitle(getResources().getString(R.string.app_name))
.setMessage(
getResources().getString(
R.string.internet_error))
.setPositiveButton("OK", null).show();
buttonStopPlay.setVisibility(View.INVISIBLE);
buttonPlay.setVisibility(View.INVISIBLE);
}
}
private void initializeUIElements() {
buttonPlay = (ImageButton) findViewById(R.id.Play);
buttonPlay.setOnClickListener(this);
buttonStopPlay = (ImageButton) findViewById(R.id.Stop);
buttonStopPlay.setOnClickListener(this);
}
public void onClick(View v) {
if (v == buttonPlay) {
startPlaying();
} else if (v == buttonStopPlay) {
stopPlaying();
finish();
startActivity(new Intent(MainActivity2.this, MainActivity2.class));
}
}
private void startPlaying() {
buttonPlay.setVisibility(View.INVISIBLE);
buttonStopPlay.setVisibility(View.VISIBLE);
progress = new ProgressDialog(this);
progress.setTitle("Message");
progress.setMessage("Loading Song ...");
progress.setCancelable(true);
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.show();
player.prepareAsync();
player.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
progress.dismiss();
player.start();
player.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
try {
// player.setNextMediaPlayer(mplayerList.get(2));
stopPlaying();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
});
}
private void stopPlaying() {
killMediaPlayer();
initializeMediaPlayer(playlistarray);
buttonPlay.setVisibility(View.VISIBLE);
buttonStopPlay.setVisibility(View.INVISIBLE);
}
private void initializeMediaPlayer(List<String> playlist) {
player = new MediaPlayer();
int noOfSongs=playlist.size();
String url = "https://aryaradio.s3.amazonaws.com/us-east-1:eb604ac1-c4e3-4226-bea8-22f214a6b0b0/RecordingArya-9459.mp3.null";
try {
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setDataSource(url);
player.setOnPreparedListener(this);
player.setOnErrorListener(new OnErrorListener() {
#Override
public boolean onError(MediaPlayer arg0, int arg1, int arg2) {
return false;
}
});
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {
public void onBufferingUpdate(MediaPlayer mp, int percent) {
Log.i("Buffering", "" + percent);
}
});
}
}

AudioRecorder App crashes when I record a second time

My app breaks down when I attempt to record a second a time when I hit the stop button. I went through this code several times. I can't find the problem. I'm not sure if its my MediaRecorder or my MediaPlayer. It works the first time around. But not the second time. can anyone find the problem.
public class PatientName extends Activity implements OnClickListener {
private Button instructionsBtn;
private ImageView record;
private ImageView stop;
private MediaPlayer instructions;
private MediaPlayer namePlayer;
private MediaRecorder nameRecorder;
private String OUTPUT_FILE;
private Button play;
private Button accept;
private LinearLayout review;
private Button delete;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.patient_name);
OUTPUT_FILE = Environment.getExternalStorageDirectory() + "/namerecording.3gpp";
initializeViews();
initializeListeners();
}
public void initializeViews() {
instructionsBtn = (Button)findViewById(R.id.patient_name_instructions);
record = (ImageView)findViewById(R.id.record_name);
stop = (ImageView)findViewById(R.id.stop_name);
stop.setVisibility(View.GONE);
play = (Button)findViewById(R.id.play_name);
play.setVisibility(View.GONE);
review = (LinearLayout)findViewById(R.id.review_name);
delete = (Button)findViewById(R.id.delete_name);
accept = (Button)findViewById(R.id.accept_name);
review.setVisibility(View.GONE);
}
public void initializeListeners() {
instructionsBtn.setOnClickListener(this);
record.setOnClickListener(this);
stop.setOnClickListener(this);
play.setOnClickListener(this);
delete.setOnClickListener(this);
accept.setOnClickListener(this);
}
#Override
public void onBackPressed() {
}
public void playInstructions() {
setMaxVolume();
instructions = MediaPlayer.create(PatientName.this, R.raw.intro_instructions);
instructions.start();
instructions.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer play) {
instructions.release();
instructionsBtn.setEnabled(true);
}
});
}
public void setMaxVolume() {
AudioManager audio = (AudioManager) getSystemService(this.AUDIO_SERVICE);
int maxVolume = audio.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
audio.setStreamVolume(AudioManager.STREAM_MUSIC, maxVolume, 0);
}
public void onClick(View v) {
int id = v.getId();
if (id==R.id.patient_name_instructions) {
instructionsBtn.setEnabled(false);
playInstructions();
}
if (id==R.id.record_name) {
beginRecording();
}
if (id==R.id.stop_name){
play.setVisibility(View.VISIBLE);
nameRecorder.stop();
}
if (id==R.id.play_name) {
playbackRecording();
}
if (id==R.id.delete_name){
deleteRecording();
}
if (id==R.id.accept_name) {
saveAndContinue();
}
}
private void beginRecording(){
record.setVisibility(View.GONE);
stop.setVisibility(View.VISIBLE);
File outFile = new File(OUTPUT_FILE);
if (outFile.exists()) {
outFile.delete();
}else {
nameRecorder = new MediaRecorder();
nameRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
nameRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
nameRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB);
nameRecorder.setOutputFile(OUTPUT_FILE);
try {
nameRecorder.prepare();
} catch (IllegalStateException e) {
Toast toast = Toast.makeText(this,"Illegal State",Toast.LENGTH_LONG);
toast.show();
e.printStackTrace();
} catch (IOException e) {
Toast toast = Toast.makeText(this,"Error Recording",Toast.LENGTH_LONG);
toast.show();
e.printStackTrace();
}
nameRecorder.start();
}
}
private void playbackRecording() {
play.setVisibility(View.GONE);
namePlayer = new MediaPlayer();
try {
namePlayer.setDataSource(OUTPUT_FILE);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
namePlayer.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
namePlayer.start();
namePlayer.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer play) {
namePlayer.release();
nameRecorder.release();
review.setVisibility(View.VISIBLE);
}
});
}
private void deleteRecording() {
Intent i = getBaseContext().getPackageManager().getLaunchIntentForPackage( getBaseContext().getPackageName() );
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
private void saveAndContinue() {
Intent intent = new Intent(PatientName.this, PatientLocation.class);
startActivity(intent);
}
}
Here is my logCat:

I figured out the issue. In the beginRecording method, I have an if and else statement that handles the output file. Unfortunately, the code that I had in the else statement was something that I wanted to always run no matter what.

Android audio delay

I have a problem when playing an mp3 in android, is something like a delay or a lag, ex:
if I have to reproduce the following: "Hello, how are you?", it only plays "how are you?" or says very low the "hello".
It happens in a ViewSonic V220 its a 22" tablet, in most of other devices, it works fine, but is in that one that seems to fail.
Its weird, becouse other apps(like youtube or media player) works fine.
This is my code, maybe i am doing something wrong:
public class SoundManager implements MediaPlayer.OnPreparedListener, MediaPlayer.OnCompletionListener {
private Parent mParent;
private MediaPlayer mediaPlayer;
String[] mp3_array;
int counter = 0;
public SoundManager(Parent parent) {
mParent = parent;
}
public void playSound(String[] url) throws IllegalArgumentException,
IllegalStateException, IOException {
mp3_array = url;
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
if (mediaPlayer.isPlaying()) {
mediaPlayer.reset();
}
mediaPlayer.setDataSource(url[0]);
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.prepareAsync();
}
public void stopMediaPlayer() {
if (mediaPlayer != null) {
mediaPlayer.release();
mediaPlayer = null;
mp3_array = null;
counter = 0;
}
}
#Override
public void onCompletion(MediaPlayer mp) {
try {
Integer c = counter;
if (mp3_array != null && counter + 1 < mp3_array.length) {
mp.reset();
mp.setOnCompletionListener(this);
mp.setOnPreparedListener(this);
counter += 1;
mp.setDataSource(mp3_array[counter]);
mediaPlayer.prepareAsync();
} else {
if (mParent != null)
mParent.invokeJs("playSoundEnded()");
mp.release();
mp = null;
mp3_array = null;
counter = 0;
}
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
#Override
public void onPrepared(MediaPlayer mp) {
if (mParent != null)
mParent.invokeJs("playSoundStarted()");
mp.start();
}
}

Android: Starting a service to play radio channels

I am trying to make a service that plays in background which is unbounded. I have walked myself through some of the example codes on the internet but I can't get my application to play the radio when I'm calling the service class.
Please have a look at the code and tell me where I am going wrong... When I call MyService class from ArmanFMRadio onClick It toasts "My Service Created" & "My Service Started" but doesnt get to play the audio for the radio stream link. I've checked it otherwise and the link seems fine, so problem lies somewhere in the code to my understanding:
package com.etc.etcc;
public class ArmanFMRadio extends Activity implements OnClickListener {
private ProgressBar playSeekBar;
private Button buttonPlay;
private Button buttonStopPlay;
private MediaPlayer player;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.armanfm);
initializeUIElements();
//initializeMediaPlayer();
}
private void initializeUIElements() {
playSeekBar = (ProgressBar) findViewById(R.id.progressBar1);
playSeekBar.setMax(100);
playSeekBar.setVisibility(View.INVISIBLE);
buttonPlay = (Button) findViewById(R.id.buttonPlay);
buttonPlay.setOnClickListener(this);
buttonStopPlay = (Button) findViewById(R.id.buttonStopPlay);
buttonStopPlay.setEnabled(false);
buttonStopPlay.setOnClickListener(this);
}
private void initializeMediaPlayer() {
player = new MediaPlayer();
try {
player.setDataSource("http://50.117.26.26:3953/Live");
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {
public void onBufferingUpdate(MediaPlayer mp, int percent) {
playSeekBar.setVisibility(View.VISIBLE);
playSeekBar.setSecondaryProgress(percent);
Log.i("Buffering", "" + percent);
}
});
}
public void onClick(View v) {
switch(v.getId()){
case R.id.buttonPlay:
playSeekBar.setVisibility(View.VISIBLE);
buttonStopPlay.setEnabled(true);
buttonPlay.setEnabled(false);
startService(new Intent(this, MyService.class));
//startPlaying();
break;
case R.id.buttonStopPlay:
stopPlaying();
break;
}
}
private void startPlaying() {
buttonStopPlay.setEnabled(true);
buttonPlay.setEnabled(false);
playSeekBar.setVisibility(View.VISIBLE);
player.prepareAsync();
player.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
player.start();
}
});
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
private void stopPlaying() {
if (player.isPlaying()) {
player.stop();
player.release();
initializeMediaPlayer();
}
buttonPlay.setEnabled(true);
buttonStopPlay.setEnabled(false);
playSeekBar.setVisibility(View.INVISIBLE);
}
#Override
protected void onPause() {
super.onPause();
if (player.isPlaying()) {
player.stop();
}
}
}
Just look at onClick on the above code, because this class works fine to my thinking.
MyService class:
package com.etc.etcc;
public class MyService extends Service {
private static final String TAG = "MyService";
private MediaPlayer player;
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
}
#Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(TAG, "onDestroy");
player.stop();
}
#Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
Log.d(TAG, "onStart");
player = new MediaPlayer();
try {
player.setDataSource("http://50.117.26.26:3953/Live");
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
player.prepareAsync();
player.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
player.start();
}
});
}
}

onStart is deprecated method. you should use onStartCommand method.
Debug your code and check weather there is any Exception or something
Also you are using the service so possible that you service will call twice in that case your onStartCommand method will be called twice so there you will have to check the startId which you will get as a parameter. If startId > 1 that means previously your service is started so you can stop media player and again start a media player with latest source or you can just ignore the second request.
If you are not confidence with service you can put your code in the activity and check weather your code is working fine or not after that you can replace this code in the service.

Android: Stop sound files playing at once

In the application I am currently writing, a user is able to select an entry from the database and play the contents of that entry: an entry is made up of a number of sound files (without a limit). In my application, I return the URI locations of the sound files of an entry (which have been stored in my database) in a List. The code is as follows:
public void audioPlayer() {
// set up MediaPlayer
MediaPlayer mp = new MediaPlayer();
DatabaseHandler db = new DatabaseHandler(this);
Entry retrieveEntry = new Entry();
retrieveEntry = db.getEntry();
List<String> path = retrieveEntry.getAudioUri();
path.size();
System.out.println("PATH SIZE: " +path.size());
System.out.println("FILEZ: " + path);
Iterator<String> i = path.iterator();
String myAudio;
int count = 0;
while (i.hasNext()) {
System.out.println(count);
myAudio = i.next();
System.out.println("MY AUDIO: " + myAudio);
MediaPlayer player = MediaPlayer.create(this, Uri.parse(myAudio));
player.start();
player.stop();
player = MediaPlayer.create(this, Uri.parse(myAudio));
player.start();
count++;
}
}
My users require that there be user input for playing a file - is there a way to play the first file, then wait for the user to press the button, then play the second file, then wait for the user to press the button, etc.? At the moment, when the play button is pressed, all of the sound files that have been returned get played at the same time, rather than one after the other.
Thanks in advance for any help provided!

You can use this class to play a playlist. This will start one audio, when that audio finishes, it will start playing next audio till the end of the list. If you want to play the playlist in looping i.e start first audio after reaching end, then pass isLooping=true in startPlayingPlaylist(list,looping)
AudioPlayer player = new AudioPlayer();
player.startPlayingPlaylist(list, false);
Class
public class AudioPlayer{
MediaPlayer player = null;
ArrayList<String> playlist = null;
int position = 0;
public AudioPlayer() {
super();
// TODO Auto-generated constructor stub
}
public void startPlayingPlaylist(ArrayList<String> list, boolean looping){
playlist = list;
if(player!=null){
player.release();
}
if(playlist!=null && playlist.size()>0){
player = MediaPlayer.create(LMApplicaton.getInstance(),Uri.parse(playlist.get(position)));
player.setWakeMode(LMApplicaton.getInstance(), PowerManager.PARTIAL_WAKE_LOCK);
player.setLooping(looping);
player.start();
// Set onCompletion listener
player.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
position = position+1;
if(position<playlist.size()){
try {
player.reset();
player.setDataSource(playlist.get(position));
player.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} else if(player.isLooping()==true){
position = position%playlist.size();
try {
player.reset();
player.setDataSource(playlist.get(position));
player.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
else if(player.isLooping()==false){
player.release();
player = null;
}
}
});
player.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
player.start();
}
});
}
}
public void pause(){
if(player!=null && player.isPlaying()){
player.pause();
}
}
public void play(){
if(player!=null && player.isPlaying()==false){
player.start();
}
}
public boolean isPlaying(){
return player.isPlaying();
}
public void release(){
if(player!=null){
player.release();
}
}
}
Edit:
The class below receives a list of audios, then plays first Audio. It plays next audio when user calls startNextAudio() You can use any one of these according to your requirements
public class AudioPlayer{
MediaPlayer player = null;
ArrayList playlist = null;
int position = 0;
public AudioPlayer() {
super();
// TODO Auto-generated constructor stub
}
public void startPlayingPlaylist(ArrayList<String> list){
playlist = list;
if(player!=null){
player.release();
}
if(playlist!=null && playlist.size()>0){
player = MediaPlayer.create(LMApplicaton.getInstance(),Uri.parse(playlist.get(position)));
player.setWakeMode(LMApplicaton.getInstance(), PowerManager.PARTIAL_WAKE_LOCK);
player.start();
// Set onCompletion listener
player.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
player.start();
}
});
}
}
public void startNextAudio(){
position = position+1;
if(position<playlist.size()){
try {
player.reset();
player.setDataSource(playlist.get(position));
player.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} else if(player.isLooping()==true){
position = position%playlist.size();
try {
player.reset();
player.setDataSource(playlist.get(position));
player.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}else{
Log.i("AudioPlayer","Playlist reached at the end");
}
}
public void pause(){
if(player!=null && player.isPlaying()){
player.pause();
}
}
public void play(){
if(player!=null && player.isPlaying()==false){
player.start();
}
}
public boolean isPlaying(){
return player.isPlaying();
}
public void release(){
if(player!=null){
player.release();
}
}
}

One approach would be to implement the MediaPlayer.OnCompletionListener interface. This gives you the MediaPlayer.onCompletion() callback method which you could use like so:
#Override
public void onCompletion(MediaPlayer mp) {
if (i.hasNext) {
// ...hand mp the next file
// ...show the user the 'play next' button
}
}
Note you also will need to call the MediaPlayer.setOnCompletionListener() method in your setup.