How can I know if the MediaPlayer is in Stopped state?

How can I know if the MediaPlayer is in Stopped state? - android

I am building an app which plays several videos, and I have two different user scenarios :
Scenario 1. While video 'A' is playing, if user clicks next button, then it stops and play the next video 'B'.
Scenario 2. Play video 'A', and if it's done, user clicks next button and it plays video 'B'.
For the first scenario, I used mediaPlayer.isPlaying() method to detect if it is in Started state and it works fine. However, if I use the same code for the second scenario, isPlaying() throws IllegalStateException.
Here's my code for playing videos :
private void playVideos(SurfaceHolder holder) {
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDisplay(holder);
Uri uri = Uri.parse("android.resource://" + getPackageName() + "/" + video_files[mCounter]);
mediaPlayer.setDataSource(this, uri);
mediaPlayer.prepare();
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
if (mCounter <= 8) {
onVideoCompletion(mediaPlayer);
} else {
mediaPlayer.stop();
mediaPlayer.release();
}
}
});
} catch (IOException e) {
} catch (IllegalArgumentException e) {
} catch (IllegalStateException e) {
}
}
Also, here's my button listener to play next video :
nextBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(mediaPlayer != null) {
if(mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.release();
}
}
mCounter += 1;
if (mCounter <= 8) {
playVideos(holder);
}
}
});
One way that I tried to hack this issue was using a boolean variable instead of isPlaying() method. For example,
boolean mIsPlaying = false;
...
// in button listener
if(mIsPlaying) {
mediaPlayer.stop();
mediaPlayer.release();
}
...
// in playVideos() function
mediaPlayer.start();
mIsPlaying = true;
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
if (mCounter <= 8) {
onVideoCompletion(mediaPlayer);
} else {
mediaPlayer.stop();
mediaPlayer.release();
}
}
});
That works for my both of scenario, but I'm not sure if it's the correct way to do it. Isn't there any way to detect whether mediaPlayer is in Stopped state?

I took a look at Google's Documentation which you can find here. You can only know if the player isPlaying(); or isLooping(); ... So no, there is not an "easy" or "short" way to achieve what you want. Hope it helped.

Related

Adding controls like pause and play to media player

I have been able to play audio from my firebase storage and i want the song to stop and start when a user clicks on same button but i haven't been able to get get the right code for that.
this is what i have tried
MediaPlayer mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(url);
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
}else {
mediaPlayer.stop();
}
}
});
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}

The above code is correct, now do one thing create button listener and write below code
button.setOnClickListener(view.onCLickListeners(){
#override
public void onClick(){
if (!mediaPlayer.isPlaying()) {
mediaPlayer.play();
}
else {
mediaPlayer.pause();
}
}});
And please define mediaplayer globally.

Android play again after stoping mediaplayer don't wok

in my simple player i have play, and stop buttons and play and pause media player work fine, now after click on stop and play again, media player don't work and i'm not sure whats problem to resolve that
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
...
playMonthLesson();
...
}
#SuppressLint("DefaultLocale")
public void playMonthLesson() {
try {
mediaPlayer.reset();
mediaPlayer.setDataSource(CoreApplication.MEDIAFOLDER + "/" + lesson.getFilename());
mediaPlayer.prepare();
mediaPlayer.start();
lesson_play.setImageResource(R.drawable.ic_pause);
int totalDuration = mediaPlayer.getDuration();
// set Progress bar values
lesson_progress_bar.setProgress(curretLessonProgress);
lesson_progress_bar.setMax(100);
// Updating progress bar
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
#OnClick(R.id.lesson_play)
public void lesson_play(View view) {
if (mediaPlayer == null) {
playMonthLesson();
} else if (mediaPlayer.isPlaying()) {
if (mediaPlayer != null) {
mediaPlayer.pause();
// Changing button image to play button
lesson_play.setImageResource(R.drawable.ic_play);
}
} else {
// Resume song
if (mediaPlayer != null) {
mediaPlayer.start();
// Changing button image to pause button
lesson_play.setImageResource(R.drawable.ic_pause);
}
}
}
#OnClick(R.id.lesson_stop)
public void setLesson_stop(View view) {
if (mediaPlayer != null) {
mediaPlayer.stop();
lesson_play.setImageResource(R.drawable.ic_play);
lesson_progress_bar.setProgress(0);
}
}

According to the MediaPlayer life cycle, which you can view in the Android API guide, I think that you have to call reset() instead of stop(), and after that prepare again the media player (use only one) to play the sound from the beginning. Take also into account that the sound may have finished. So I would also recommend to implement setOnCompletionListener() to make sure that if you try to play again the sound it doesn't fail.

The problem is that when you stop mediaplayer and click on play again your call will go to mediaplayer.play() as mediaplayer is not null.
You will have to null the mediaPlayer on stop method. Now, once you stop mediaplayer and again click on play it will call playMonthLesson();
#OnClick(R.id.lesson_stop)
public void setLesson_stop(View view) {
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.reset();
mediaPlayer = null;
lesson_play.setImageResource(R.drawable.ic_play);
lesson_progress_bar.setProgress(0);
}
}
change this code too,
#SuppressLint("DefaultLocale")
public void playMonthLesson() {
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.reset();
mediaPlayer.setDataSource(CoreApplication.MEDIAFOLDER + "/" + lesson.getFilename());
mediaPlayer.setOnPreparedListener(new OnPreparedListener(){
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
lesson_play.setImageResource(R.drawable.ic_pause);
int totalDuration = mediaPlayer.getDuration();
}
});
mediaPlayer.prepareAsync();
// set Progress bar values
lesson_progress_bar.setProgress(curretLessonProgress);
lesson_progress_bar.setMax(100);
// Updating progress bar
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

NullPointerException in MediaPlayer after pressing the home button and reopening the app

This is my code, I want to keep music playing when the app is in background. And I want to be able to pause it when I re-open the app. The music should play in the background, but for some reason media player returns null pointer when I re-open it. So, when I pause it, it crashes.
public void play(View view) {
if (status) {
status = false;
requestRecordAudioPermission();//audio permission
startPlay();//start mediaplayer
} else {
status = true;
mediaPlayer.pause();
}
}
public void startPlay() {
mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(URL_LINK);
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(HomeActivity.this, "CAN'T PLAY!",Toast.LENGTH_LONG).show();
}
mediaPlayer.start();
}
Why Media Player returns null after pressing the home button and reopening the app?
Thanks for help

If you are streaming audio from an url then try to load the Media Player asynchronously.
String url = "YOUR_URL";
MediaPlayer myMediaPlayer = new MediaPlayer();
myMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
myMediaPlayer.setDataSource(url);
myMediaPlayer.prepareAsync();
} catch (IOException e) {
Toast.makeText(this, "mp3 not found", Toast.LENGTH_SHORT).show();
}
myMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer player) {
player.start();
}
});

arraylist to play with playback

I am getting list of mp3 files(as a ArrayList(Path)) from local by choosing one by one but I could not able to make them to play one by one play if finished move to next and if finished all list loop again. any help?

I solved issue thansk to : http://www.helloandroid.com/tutorials/musicdroid-audio-player-part-i
ofcourse I did a little bit modification, like:
private void playSong() {
try {
mp.reset();
mp.setDataSource(playlist.get(currentPosition));
mp.prepare();
mp.start();
// Setup listener so next song starts automatically
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
public void onCompletion(MediaPlayer arg0) {
nextSong();
}
});
} catch (IOException e) {
Log.v(getString(R.string.app_name), e.getMessage());
}
}
private void nextSong() {
if (++currentPosition >= playlist.size()) {
// Last song, just reset currentPosition
currentPosition = 0;
} else {
// Play next song
playSong(/*MEDIA_PATH + playlist.get(currentPosition)*/);
}
}

Media Player called in state 0, error (-38,0)

I am currently trying to design a simple app that streams an internet radio station. I have the URL for the station and am setting up the Media Player like
MediaPlayer mediaPlayer = new MediaPlayer();
try {
mediaPlayer.setDataSource(URL);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
mediaPlayer.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
The program isn't crashing when emulated, but nothing is playing and I am get the following error:
start called in state 0
and right below it is
Error (-38,0)
Does anyone know what this means?
I've read a little about these state errors, but couldn't find anything that applies to my project.

You need to call mediaPlayer.start() in the onPrepared method by using a listener.
You are getting this error because you are calling mediaPlayer.start() before it has reached the prepared state.
Here is how you can do it :
mp.setDataSource(url);
mp.setOnPreparedListener(this);
mp.prepareAsync();
public void onPrepared(MediaPlayer player) {
player.start();
}

It seems like Error -38 means a state-exception (as the error-message indicates). For example if you call start(), before the song was ready, or when you call pause(), even if the song isn't playing at all.
To fix this issue check the state of the mediaPlayer before calling the methods. For example:
if(mediaPlayer.isPlaying()) {
mediaPlayer.pause();
}
Additionally, the MediaPlayer is sending event-messages. Even if you do not need the prepared-event (although it would be a good idea to not start the playback before this event was fired) you must set a callback-listener. This also holds true for the OnErrorListener, OnCompletionListener, OnPreparedListener and OnSeekCompletedListener (if you call the seek method).
Listeners can be attached simply by
mediaPlayer.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
// Do something. For example: playButton.setEnabled(true);
}
});

I got this error when I was trying to get the current position (MediaPlayer.getCurrentPosition()) of media player when it wasn't in the prepared stated. I got around this by Keeping track of its state and only calling the getCurrentPosition() method after onPreparedListener is called.

This is my code,tested and working fine:
package com.example.com.mak.mediaplayer;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.app.Activity;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final MediaPlayer mpp = MediaPlayer.create(this, R.raw.red); //mp3 file in res/raw folder
Button btnplay = (Button) findViewById(R.id.btnplay); //Play
btnplay.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View vone) {
mpp.start();
}
});
Button btnpause = (Button) findViewById(R.id.btnpause); //Pause
btnpause.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View vtwo) {
if (mpp.isPlaying()) {
mpp.pause();
mpp.seekTo(0);
}
}
});
}
}

I encountered the same issue few days ago. My audio MediaPlayer works fine on devices with high processing power, but for slow devices, the media player just did not play some time and from LogCat it had many complain about called in wrong state. So I resolved it by calling putting the call to start(), pause(),... in onPrepared() method of OnPreparedListener() as below:
mediaPlayer.prepare();
mediaPlayer.setOnPreparedListener(new OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
........
mediaPlayer.start();
....
songControlBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
} else {
mediaPlayer.start();
}
}
});
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
............
}
});
}
});
Also try to release any media player that you do not need any more. For example, if you do not want to play the audio or video on background then you should call mediaPlayer.release() in onPause().

i tested below code. working fine
public class test extends Activity implements OnErrorListener, OnPreparedListener {
private MediaPlayer player;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
player = new MediaPlayer();
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
player.setDataSource("http://www.hubharp.com/web_sound/BachGavotte.mp3");
player.setOnErrorListener(this);
player.setOnPreparedListener(this);
player.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void onDestroy() {
super.onDestroy();
player.release();
player = null;
}
#Override
public void onPrepared(MediaPlayer play) {
play.start();
}
#Override
public boolean onError(MediaPlayer arg0, int arg1, int arg2) {
return false;
}
}

Some times file are encoded in a way that Android can't decode. Even some mp4 files can not be played. Please try a different file format (.3gp are played most of the time) and see..

You get this message in the logs, because you do something that is not allowed in the current state of your MediaPlayer instance.
Therefore you should always register an error handler to catch those things (as #tidbeck suggested).
At first, I advice you to take a look at the documentation for the MediaPlayer class and get an understanding of what that with states means. See: http://developer.android.com/reference/android/media/MediaPlayer.html#StateDiagram
Your mistake here could well be one of the common ones, the others wrote here, but in general, I would take a look at the documentation of what methods are valid to call in what state: http://developer.android.com/reference/android/media/MediaPlayer.html#Valid_and_Invalid_States
In my example it was the method mediaPlayer.CurrentPosition, that I called while the media player was in a state, where it was not allowed to call this property.

above the picture,you can get the right way.

I solved both the errors (-19,0) and (-38,0) , by creating a new object of MediaPlayer every time before playing and releasing it after that.
Before :
void play(int resourceID) {
if (getActivity() != null) {
//Using the same object - Problem persists
player = MediaPlayer.create(getActivity(), resourceID);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
player.release();
}
});
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
}
}
After:
void play(int resourceID) {
if (getActivity() != null) {
//Problem Solved
//Creating new MediaPlayer object every time and releasing it after completion
final MediaPlayer player = MediaPlayer.create(getActivity(), resourceID);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
player.release();
}
});
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
}
}

if(length>0)
{
mediaPlayer = new MediaPlayer();
Log.d("length",""+length);
try {
mediaPlayer.setDataSource(getApplication(),Uri.parse(uri));
} catch(IOException e) {
e.printStackTrace();
}
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mediaPlayer.seekTo(length);
mediaPlayer.start();
}
});
mediaPlayer.prepareAsync();

It was every much frustrated. So, I got solution which works for me.
try {
if (mediaPlayer != null) {
mediaPlayer.release();
mediaPlayer = null;
}
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(file.getAbsolutePath());
mediaPlayer.setAudioStreamType(AudioManager.STREAM_NOTIFICATION);
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mediaPlayer) {
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
});
}
});
mediaPlayer.prepare();
} catch (Exception e) {
e.printStackTrace();
}

For me this worked
mp.seekTo(0);
mp.start();

I also got this error i tried with onPreparedListener but still got this error. Finally i got the solution that error is my fault because i forgot the internet permission in Android Manifest xml. :)
<uses-permission android:name="android.permission.INTERNET" />
I used sample coding for mediaplayer. I used in StreamService.java
onCreate method
String url = "http://s17.myradiostream.com:11474/";
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(url);
mediaPlayer.prepare();

mp = new MediaPlayer();
AssetFileDescriptor afd = mContext.getAssets().openFd(fileName);
mp.reset();
mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
mp.prepare();
mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
mp.prepareAsync();

I have change setAudioStreamType to setAudioAttributes;
mediaPlayer.setAudioAttributes(AudioAttributes.Builder()
.setFlags(AudioAttributes.FLAG_AUDIBILITY_ENFORCED)
.setLegacyStreamType(AudioManager.STREAM_ALARM)
.setUsage(AudioAttributes.USAGE_ALARM)
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.build());

I am new in android programming and i had same error as this one. so i simply redefined the mp.createmediaPlayer = MediaPlayer.create(getApplicationContext(), Settings.System.DEFAULT_RINGTONE_URI). It may not the true way to do it but it worked fined for me:
try {
mp = MediaPlayer.create(getApplicationContext(), Settings.System.DEFAULT_RINGTONE_URI);
} catch (Exception e) {
e.printStackTrace();
}
mp.start();

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

How can I know if the MediaPlayer is in Stopped state? - android

I took a look at Google's Documentation which you can find here. You can only know if the player isPlaying(); or isLooping(); ... So no, there is not an "easy" or "short" way to achieve what you want. Hope it helped.

Related

Adding controls like pause and play to media player

Android play again after stoping mediaplayer don't wok

NullPointerException in MediaPlayer after pressing the home button and reopening the app

arraylist to play with playback

Media Player called in state 0, error (-38,0)

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