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POUnhandled exception type IOException for audio recorder
 

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  1. POUnhandled exception type IOException for audio recorder
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    <p>Currently, i'm trying to develop an audio recorder in the android application to be eventually send to the online server and then be multicasted. However before i can carry on, i met error like Unhandled exception type IOException. I have added a ** sign at the part where the error appeared. Please help. </p> <pre><code>package com.example.testproject; import java.io.File; import android.app.Activity; import android.media.MediaPlayer; import android.media.MediaRecorder; import android.os.Bundle; import android.os.Environment; import android.view.View; public class Sound extends Activity { private MediaPlayer mediaPlayer; private MediaRecorder recorder; private String OUTPUT_FILE; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.audio); OUTPUT_FILE=Environment.getExternalStorageDirectory()+"/audiorecorder.3gpp"; } public void buttonTapped(View view){ switch(view.getId()){ case R.id.btnstart: try { beginRecording(); }catch(Exception e){ e.printStackTrace(); } break; case R.id.btnfinish: try { stopRecording(); }catch(Exception e){ e.printStackTrace(); } break; case R.id.btnplay: try { playRecording(); }catch(Exception e){ e.printStackTrace(); } break; case R.id.btnstop: try { stopPlayback(); }catch(Exception e){ e.printStackTrace(); } break; } } private void stopPlayback(){ } private void playRecording() throws Exception{ ditchMediaPlayer(); mediaPlayer = new MediaPlayer(); mediaPlayer.setDataSource(OUTPUT_FILE); mediaPlayer.prepare(); mediaPlayer.start(); } private void ditchMediaPlayer(){ if(mediaPlayer != null) { try{ mediaPlayer.release(); }catch(Exception e) { e.printStackTrace(); } } } private void stopRecording(){ if(recorder != null) recorder.stop(); } private void beginRecording(){ ditchMediaRecorder(); File outputFile = new File(OUTPUT_FILE); if(outputFile.exists()) outputFile.delete(); recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(OUTPUT_FILE); **recorder.prepare();** recorder.start(); } private void ditchMediaRecorder() { if(recorder != null) recorder.release(); } } </code></pre>
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    1. USTeo Chuen Wei Bryan
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