Develop Reference

I can't play some audio got from firebase storage

I'm trying to get audios from firebase storage and play with MediaPlayer. And actually I can do this but the problem is I can't play some of the audios. I realized that it can't play audios which have size higher than 50 kb. I can play audios which the size less than 50 kb.
Btw this is my first question here. Sorry for mistakes.
Errors:
E/FLACExtractor: unsupported sample rate 44000
E/GenericSource: initFromDataSource, source has no track!
E/GenericSource: Failed to init from data source!
E/MediaPlayerNative: error (1, -2147483648)
E/MediaPlayer: Error (1,-2147483648)
public class KelimeSecimActivity extends AppCompatActivity implements MediaPlayer.OnPreparedListener {
MediaPlayer mMediaplayer = new MediaPlayer();
private Button buttonBasla ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_kelime_secim);
buttonBasla = findViewById(R.id.buttonBasla);
mMediaplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
fetchAudioUrlFromFirebase();
buttonBasla.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
onPrepared(mMediaplayer);
}
});
}
private void fetchAudioUrlFromFirebase() {
final FirebaseStorage storage = FirebaseStorage.getInstance();
// Create a storage reference from our app
StorageReference storageRef = storage.getReferenceFromUrl("MY_URL");
storageRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
#Override
public void onSuccess(Uri uri) {
try {
// Download url of file
final String url = uri.toString();
mMediaplayer.setDataSource(url);
// wait for media player to get prepare
mMediaplayer.setOnPreparedListener(null);
mMediaplayer.prepareAsync();
} catch (IOException e) {
e.printStackTrace();
}
}
})
.addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(getApplicationContext(),"Failed",Toast.LENGTH_SHORT).show();
}
});
}
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
As i said, there is no problem if the audio size low than 50 kb. Actually i'm not sure whether it's because of size. But I tried many files and result is like this.

I am able to reproduce the issue. The files you mentioned do work in other players, but don't work in Android's MediaPlayer.
The problem files are all encoded at 44000Hz, using libFLAC 1.1.3.
The files that work are all 44100Hz, using libFLAC 1.1.2.
The size correlation appears to be a coincidence. For instance, En-us-you_re2.flac plays fine. It's 166KB, but it's 44100Hz.
It's clear that 44000Hz is a valid rate, but MediaPlayer simply doesn't support it. You may have better luck with exoplayer with the FLAC extension. Worst case, you might have to find your own decompression library and do the conversion yourself.

streaming a mp3 from a site/server

hi guys me and a few other djs want to be able to upload our mixes to a site that could then be streamed direct in to my app. at the moment i have the files stored on google drive. they will download and then i can play via a media player. but i want the user to be able to just stream the music direct from the site..
1) what site would you suggest for uploading of the music. i have a firebase account would this be an idea or would the data from the files i upload be expensive? im on the pay as you go account type.
****EDIT
So ive found out that firebase could be a n actual viable option for doing this
2) what would be the best way to implement the code so that it streams the music direct rather than downloading it first?
****EDIT
ive found some code while trawling the internet that could make this viable but i seam to be getting a null pointer error on the setDatasource
this is my code
i have this my onchild added
final String url = dataSnapshot.child("url").getValue(String.class);
urlList.add(url);
then in my onitemclick i use
mp3url = urlList.get(i);
fetchAudioUrlFromFirebase();
finally the method for streaming the mp3
private void fetchAudioUrlFromFirebase() {
String mp3 = mp3url;
final FirebaseStorage storage = FirebaseStorage.getInstance();
storageRef = storage.getReferenceFromUrl(mp3);
storageRef.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
#Override
public void onSuccess(Uri uri) {
try {
// Download url of file
final String url = uri.toString();
mMediaplayer.setDataSource(url);
// wait for media player to get prepare
mMediaplayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
mMediaplayer.prepareAsync();
} catch (IOException e) {
e.printStackTrace();
}
}
})
.addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Log.i("TAG", e.getMessage());
}
});
}
this is my full logcat with the null pointer error
07-11 18:39:45.326 2565-2565/com.example.harrops.h20droidapp2 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.harrops.h20droidapp2, PID: 2565
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.setDataSource(java.lang.String)' on a null object reference
at com.example.harrops.h20droidapp2.Mixes$3.onSuccess(Mixes.java:198)
at com.example.harrops.h20droidapp2.Mixes$3.onSuccess(Mixes.java:192)
at com.google.android.gms.tasks.zze$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

Following line means: mMediaPlayer is null.
java.lang.NullPointerException: Attempt to invoke virtual method
'void android.media.MediaPlayer.setDataSource(java.lang.String)'
on a null object reference
Please check mMediaplayer is initialized before onSuccess(Uri uri) method is called.
mMediaplayer = new MediaPlayer();

Q1: i have no idea about a site do this, sorry
Q2: you have to learn how to use MediaPlayer class in android and here is an example :
String link = "your link.mp3"; //usually it's ends with .mp3
Mediaplayer player = new MediaPlayer();
player.setDataSource(link);
player.prepare();//prepare to play
player.start();
Its a quick and very simple example.
You can edit this as your need.

Android MediaPlayer prepare failed: status = 0x1 and Mediaplayer.creat() returns null with .AAC audio file

I am accessing the audio files from
/data/user/0/app_packagename/files/filename
I don't have WRITE_EXTERNAL READ_EXTERNAL permissions.
Now I can access files which are saved in the /data/user/0/app_packagename/files/ without WRITE_EXTERNAL READ_EXTERNAL permissions.
And can able to play all the audio files in my application.
In my application I am playing all files in queue. Few of my users are not able to play second audio file once 1st audio file completed.
Below is my code
void playNext(File varientFile) {
if (mSessionMediaPlayer != null) {
if (mSessionMediaPlayer.isPlaying()) {
mSessionMediaPlayer.stop();
}
mSessionMediaPlayer.release();
mSessionMediaPlayer = null;
}
mSessionMediaPlayer = new MediaPlayer();
if (mSessionMediaPlayer != null) {
Uri uri = Uri.parse(variantFile.getAbsolutePath());
mSessionMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mSessionMediaPlayer.setDataSource(this, uri);
mSessionMediaPlayer.setLooping(false);
mSessionMediaPlayer.prepare();
mSessionMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
playNext(mFiles.get(mNextIndex);
}
});
mSessionMediaPlayer.start();
runScheduler();
}
}
Instead of
mSessionMediaPlayer = new MediaPlayer();
I had tried with
mSessionMediaPlayer = MediaPlayer.create(getApplicationContext(),
uri);
Even MediaPlayer.create() is returning null. mSessionMediaPlayer.prepare() is throwing an exception
Cause : Prepare failed.: status=0x1
Whats wrong with my code? Why it is getting null or prepare failed? I had tested the files as well they are working, audio file format is in .aac.
The same user who is not able to play second audio file. He is able to play first file with the same code. But if same method is calling from onCompleted() it is not working. Why so?
Can anyone please help me to fix this issue?

Instead of creating a new object every time, try with the same Media Player object something like this.
MediaPlayer mSessionMediaPlayer;
mSessionMediaPlayer = MediaPlayer.create(getApplicationContext(),uri);
mSessionMediaPlayer.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer mSessionMediaPlayer) {
moveToNext(mSessionMediaPlayer,nextUri);
}
});
mSessionMediaPlayer.prepare();
mSessionMediaPlayer.start();
private void moveToNext(MediaPlayer mSessionMediaPlayer,Uri uri){
mSessionMediaPlayer.create(getApplicationContext(), uri);
mSessionMediaPlayer.prepare();
mSessionMediaPlayer.start();
}

Android mediaplayer using uri causes app crash

I have been working to resolve this problem for the last three days and cannot get it working. These are the steps of my app:
Open file browser to select and audio file
Audio file is selected
Selected audio file is added to the database
from a list of items the added file is selected
a play button is pressed to play the sound file
at this point the sound file will play, however if I close the app then open it again and attempt to play the same sound file the app crashes with the following error:
FATAL EXCEPTION: main
Process: com.arcitech.developer.ultimatesoundboard, PID: 22967
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.start()' on a null object reference
at com.arcitech.developer.ultimatesoundboard.activities.ItemDetailFragment$4.onClick(ItemDetailFragment.java:153)
at android.view.View.performClick(View.java:5156)
at android.view.View$PerformClick.run(View.java:20755)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5835)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
the filepath(uri) I am saving to the database is:
Content://com.android.providers.media.documents/document/audio%3A15790
and the code I am using is located in the onCreateView of a fragment:
MediaPlayer m;
playSound.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (m != null) {
m.stop();
m.release();
m = null;
}
m = MediaPlayer.create(getActivity(), Uri.parse(mItem.filePath));
m.start();
m.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer m) {
countdownTimerHandler.removeCallbacks(countdownTimerRunnable);
}
});
}
});

According to the doc for MediaPlayer.create(), it can return null if for some reason MediaPlayer cannot be created. You should be checking the return value for null every time unless you are very confident that it will not return null (but even then, do it for safety).
You may also want to check the log at the time create() is called to see if Android is leaving any clues as to why creation failed.

Android media player returns IllegalStateException

I have following code to play small audio files
private void playVoice() {
if (mPlayVoice != null) {
if (mPlayVoice.isPlaying()) {
mPlayVoice.release();
mPlayVoice = null;
}
}
mPlayVoice =
MediaPlayer.create(BirdsActivity.this, mSoundIds[getCurrentIndex()]);
mPlayVoice.start();
}
It works fine in Samsung galaxy tab but gives below error in small device(I Checked in Sony xperia mini pro my project)
08-17 12:45:45.232: ERROR/AndroidRuntime(6639): java.lang.IllegalStateException
08-17 12:45:45.232: ERROR/AndroidRuntime(6639): at android.media.MediaPlayer.isPlaying(Native Method)
08-17 12:45:45.232: ERROR/AndroidRuntime(6639): at com.android.mds.kidsapps.alphakids.BirdsActivity.playVoice(BirdsActivity.java:146)

You're doing this:
PlayVoice.release();
Do you not mean
mPlayVoice.release();
If you have other issues this is the best document to consult:
Android MediaPlayer
EDIT
Ok if you are here: isPlaying() Invalid States it show's you're trying to call isPlaying() while the player is in the error state. So you need to work out why it is already in the error state.
In general, some playback control operation may fail due to various reasons, such as unsupported audio/video format, poorly interleaved audio/video, resolution too high, streaming timeout, and the like.
Have a look at adding an error listener: setOnErrorListener()

Use the following code as i was facing the same exception.
try {
if(mPlayVoice!=null && mPlayVoice.isPlaying()) {
Log.d("TAG------->", "player is running");
mPlayVoice.stop();
Log.d("Tag------->", "player is stopped");
mPlayVoice.release();
Log.d("TAG------->", "player is released");
}
} catch(Exception e){
}
Here write whatever you want to do. Actually the condition checking like isPlaying() or checking for null generates the IllegalStateException.....

You may have to clear the audioGroup joined with audioStream. Mine worked with the following code:
public static void audioPlayCaptureStop()
{
try
{
if(audioStream.isBusy())
{
audioGroup.clear();
audioStream.release();
System.out.println("audioStream released");
}
} catch (Exception e) {
System.out.println("audioStream release exception: "+e.toString());
}
}