audioRecorder.java

package org.ale.openwatch;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;

import android.media.MediaRecorder;
import android.os.Environment;

public class audioRecorder {

  final MediaRecorder recorder = new MediaRecorder();
  String path;
  rService rs;

  /**
   * Creates a new audio recording at the given path (relative to root of SD card).
   */
  public audioRecorder(String path) {
    this.path = sanitizePath(path);
  }
  
  public void setParent(rService arse) {
      rs = arse;
  }

  private String sanitizePath(String path) {
    if (!path.startsWith("/")) {
      path = "/" + path;
    }
    if (!path.contains(".")) {
      path += ".3gp";
    }
    return Environment.getExternalStorageDirectory().getAbsolutePath() + path;
  }

  /**
   * Starts a new recording.
   */
  public void start() throws IOException {
      
    path = sanitizePath("/recordings/" + System.currentTimeMillis() + ".3gp");
      
    String state = android.os.Environment.getExternalStorageState();
    if(!state.equals(android.os.Environment.MEDIA_MOUNTED))  {
        throw new IOException("SD Card is not mounted.  It is " + state + ".");
    }

    // make sure the directory we plan to store the recording in exists
    File directory = new File(path).getParentFile();
    if (!directory.exists() && !directory.mkdirs()) {
      throw new IOException("Path to file could not be created.");
    }
    
    setPath(path);
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    recorder.setOutputFile(path);
    recorder.prepare();
    recorder.start();
  }
  
  public void setPath(String s) {
      try {
          File f = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/rpath.txt");
          f.delete();
          f.createNewFile();
          FileOutputStream fOut = new FileOutputStream(f);
          OutputStreamWriter osw = new OutputStreamWriter(fOut); 
          osw.write(s);
          osw.flush();
          osw.close();
      }catch(IOException e) {
          e.printStackTrace();
      }
  }

  /**
   * Stops a recording that has been previously started.
   */
  public void stop() throws IOException {
    recorder.stop();
    recorder.release();
  }

}