录音效果
import java.io.File;import java.io.IOException;import android.media.MediaRecorder;import android.os.Environment;/** * @author <a href="http://www.benmccann.com">Ben McCann</a> */public class AudioRecorder {final MediaRecorder recorder = new MediaRecorder();final String path;/** * Creates a new audio recording at the given path (relative to root of SD card). */public AudioRecorder(String path) { this.path = sanitizePath(path);}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 { 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."); } recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(path); recorder.prepare(); recorder.start();}/** * Stops a recording that has been previously started. */public void stop() throws IOException { recorder.stop(); recorder.release();}}
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