TheKilz TheKilz - 6 months ago 31
Android Question

Getting IllegalStateException in MediaPlayer when trying to getCurrentPosition

I've been trying to make my trackbar work with the music player I just started working on. But when I press next, I get an Exception.
Here's my code:

public class ThePlayer extends AppCompatActivity {

private static final String TAG = "MyActivity";
static MediaPlayer mp;
int position;
SeekBar mSeekBar;
Button btnPlay, btnFF, btnFB, btnNext, btnPrev;
int[] w2 = {R.raw.w2l01f01, R.raw.w2l01f03, R.raw.w2l01f04};
ArrayList<Integer> mysongs;
Thread updateSeekBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_the_player);
position = 0;
btnPlay = (Button) findViewById(R.id.btnPlay);
btnPlay.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
if (mp.isPlaying()) {
btnPlay.setText(">");
mp.pause();
} else {
btnPlay.setText("||");
mp.start();
}
}
});
btnNext = (Button) findViewById(R.id.btnNext);
btnNext.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
mp.stop();
mp.release();
position = (position + 1) % w2.length;
try {
mp = MediaPlayer.create(getApplicationContext(), w2[position]);
} catch (IllegalArgumentException e) {
Log.e(TAG, "Unable to play audio queue do to exception: " + e.getMessage(), e);
} catch (IllegalStateException e) {
Log.e(TAG, "Unable to play audio queue do to exception: " + e.getMessage(), e);
}
mSeekBar.setMax(mp.getDuration());
mp.start();
}
});

btnPrev = (Button) findViewById(R.id.btnPrev);

if (mp != null) {
mp.stop();
mp.release();
}
mSeekBar = (SeekBar) findViewById(R.id.seekBar);
updateSeekBar = new Thread() {
@Override
public void run() {
int currentPostion = 0;
while (mp.isPlaying() && mp != null && mp.getCurrentPosition() < mp.getDuration()) {
try {
sleep(500);

currentPostion = mp.getCurrentPosition();

} catch (InterruptedException e) {
e.printStackTrace();
} catch (IllegalStateException e) {

e.printStackTrace();
}
mSeekBar.setProgress(currentPostion);
}
}

};





mp = MediaPlayer.create(this, w2[0]);
mp.start();
mSeekBar.setMax(mp.getDuration());
updateSeekBar.start();
mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mp.seekTo(seekBar.getProgress());
}

});

}


}

Everytime I click on the button next (btnNext), I get this Error

01-04 08:45:01.028 1567-1585/com.wizardarapiraca.wizardplayer E/AndroidRuntime: FATAL EXCEPTION: Thread-93
01-04 08:45:01.028 1567-1585/com.wizardarapiraca.wizardplayer E/AndroidRuntime: Process: com.wizardarapiraca.wizardplayer, PID: 1567
01-04 08:45:01.028 1567-1585/com.wizardarapiraca.wizardplayer E/AndroidRuntime: java.lang.IllegalStateException
01-04 08:45:01.028 1567-1585/com.wizardarapiraca.wizardplayer E/AndroidRuntime: at android.media.MediaPlayer.getCurrentPosition(Native Method)
01-04 08:45:01.028 1567-1585/com.wizardarapiraca.wizardplayer E/AndroidRuntime: at com.wizardarapiraca.wizardplayer.ThePlayer$4.run(ThePlayer.java:107)

MPG MPG
Answer

From comment:

You can try it by removing these to statement mp.stop(); mp.release(); and add mp.pause();

At this state media player can not stop and release.because...

When a MediaPlayer object is just created using new or after reset() is called, it is in the Idle state; and after release() is called, it is in the End state.

Calling setDataSource(FileDescriptor), or setDataSource(String), or setDataSource(Context, Uri), or setDataSource(FileDescriptor, long, long), or setDataSource(MediaDataSource) transfers a MediaPlayer object in the Idle state to the Initialized state.

An IllegalStateException is thrown if setDataSource() is called in any other state.for more