stack overflow exception in thread on Android

Question

I am doing code for calculating bpm for media files. my requirement is i have to play song only for 5 seconds not more than 5 seconds. so i use Thread.sleep(5000) and i call handler message. it throws java.long.stackoverflowexception.

my code:

currentThread.start(); 
....    
    public void run() {
        try {
            Log.e("bpm", "in run method");
            BPM2SampleProcessor processor = new BPM2SampleProcessor();
            processor.setSampleSize(1024);
            EnergyOutputAudioDevice output = new EnergyOutputAudioDevice(processor);     
            output.setAverageLength(1024);      
            try {
                player = new Player(new FileInputStream("/sdcard/taxi.mp3"), output); // line no 40
                currentThread.run();  // line no 41
                player.play();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (JavaLayerException e) {
                e.printStackTrace();
            }
           text.setText("bpm is  "+processor.getBPM());
           Log.e("bpm","  bpm is  "+processor.getBPM());            
           Thread.sleep(5000);
       threadHandler.sendEmptyMessage(0);
                         Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }       
    }

private Handler threadHandler = new Handler() 
{
    public void handleMessage(android.os.Message msg) 
    {
     Log.e("calledThread","5seconds");  
     player.close();
    }
};

log cat:

  05-20 18:05:01.761: ERROR/AndroidRuntime(2777): Uncaught handler: thread Thread-8 exiting due to uncaught exception
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777): java.lang.StackOverflowError
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:49)
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:45)
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.ReadWriteHeapByteBuffer.<init>(ReadWriteHeapByteBuffer.java:49)
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.BufferFactory.newByteBuffer(BufferFactory.java:51)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.ByteBuffer.allocate(ByteBuffer.java:54)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:351)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.charset.Charset.encode(Charset.java:711)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.lang.String.getBytes(String.java:1022)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at org.apache.harmony.luni.util.Util.getBytes(Util.java:61)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.io.File.properPath(File.java:1362)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.io.FileInputStream.<init>(FileInputStream.java:77)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.io.FileInputStream.<init>(FileInputStream.java:130)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at beatit.beatit.main2.run(main2.java:40)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.lang.Thread.run(Thread.java:1096)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at  beatit.beatit.main2.run(main2.java:41)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.lang.Thread.run(Thread.java:1096)

 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.la
 05-20 18:05:05.573: ERROR/JavaBinder(1276): !!! FAILED BINDER TRANSACTION !!!

MByD · Accepted Answer · 2011-05-20 13:05:38Z

3

Your thread calling the run method over and over again, causing a stackoverflow:

currentThread.run();

There is no condition to stop that. (Just to make it clear, currentThread.start() calls the run method in some stage)

answered May 20, 2011 at 13:05

MByD

138k30 gold badges269 silver badges278 bronze badges

Sign up to request clarification or add additional context in comments.

11 Comments

MByD Over a year ago

you better do. why is it there in first place?

M.A.Murali Over a year ago

after i remove currentThread.run(); the song is continuously playing. not stop after 5 seconds. what to do for stop? please help me.

MByD Over a year ago

add a sleep for another 1 second after you send the message to the handler. It should work, unfortunately I don't have an android around me to test it now.

M.A.Murali Over a year ago

Thread.sleep(5000); threadHandler.sendEmptyMessage(0); Thread.sleep(1000); i did above coding. but i get following error: please help me android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

MByD Over a year ago

it's hard to tell exactly what you should do without more code, but any GUI operation should be performed on the GUI (main) thread. look at AsyncTask, it might help you --> developer.android.com/reference/android/os/AsyncTask.html

|

pawelzieba · Accepted Answer · 2011-05-20 13:32:52Z

1

You almost answered yourself:

currentThread.run();  // line no 41

Below I wrote example how to deal with your problem:

    AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {
        @Override
        protected Void doInBackground(Void... params) {
            //put your code here
        }
    };

    try {
        task.execute((Void)null).get(5, TimeUnit.SECONDS);
    } catch(Exception e) {
        e.printStackTrace();
    }

edited May 20, 2011 at 13:32

answered May 20, 2011 at 13:05

pawelzieba

16.1k3 gold badges48 silver badges72 bronze badges

1 Comment

M.A.Murali Over a year ago

after i remove currentThread.run(); the song is continuously playing. not stop after 5 seconds. what to do for stop? please help me.

Collectives™ on Stack Overflow

stack overflow exception in thread on Android

2 Answers 2

11 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

11 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related