while loop inside try-catch block causing app to crash

Question

My thread's run() method has while loop inside a try-catch block as follows:

 try{
    while(true){    
       // some code here 
       if(condition) 
           break;
       else
           //more code here
    }   
 }catch(Exception e){..}

I guess the code is not getting into infinite loop since :

1. My if condition is guaranteed to cause the loop to break after some iterations.

2. Since the catch block is outside while loop, any exception inside while loop will cause the loop to break.

As soon as I start the thread,the app crashes.

I have gone through this post but still its unclear whats wrong with above code.

Here is my complete run method :

private static final int AUDIO_SOURCE=MediaRecorder.AudioSource.MIC;
private static final int SAMPLE_RATE_IN_HZ=44100;
private static final int CHANNEL_CONFIG=AudioFormat.CHANNEL_IN_MONO;
private static final int AUDIO_FORMAT=AudioFormat.ENCODING_PCM_16BIT;

    public void run() {
                //writing to AudioTrack object using 512kB buffer
                int buffSize=512*1024; //512kb = 512*1024 B 
                byte[] buff=new byte[buffSize];
                int fileSize=(int)outputFile.length(); //outputFile=.PCM file
                int bytesRead=0,readCount=0;
                FileInputStream fin=null;           
                try {
                    fin = new FileInputStream(outputFile);
                }catch(Exception e){}

                int TrackBufferSizeInBytes=android.media.AudioTrack.getMinBufferSize(SAMPLE_RATE_IN_HZ, CHANNEL_CONFIG,AUDIO_FORMAT); 

                //create AudioTrack object
                AudioTrack at = new AudioTrack(AudioManager.STREAM_MUSIC,SAMPLE_RATE_IN_HZ,CHANNEL_CONFIG,
                AUDIO_FORMAT, TrackBufferSizeInBytes, AudioTrack.MODE_STREAM); 

                at.play();

                try{
                    while(bytesRead<fileSize){  
                        readCount=fin.read(buff,0,buffSize);
                        if(readCount==(-1)) // if EOF is reached 
                            break;
                        else{
                            at.write(buff, 0, readCount); //write read bytes to Track
                            bytesRead+=readCount; 
                        }
                    }
                    at.stop();
                    at.release();
                    at=null;
                    fin.close();
                }catch(Exception e){}
            }

Please help me.Thanks in advance!

Answer 1

You should use printStackTrace() method in your catch block, it will display the Exception generated on which line of code !

Try using this in your catch block :

e.printStackTrace();

Or you can insert breakpoint & debug the code to see its behaviour

Or you can also use Log & see the values of variables in Logcat