权限:
<uses-permission android:name="android.permission.RECORD_AUDIO"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
先实现类:
import android.media.MediaRecorder; import android.os.Environment; import android.os.Handler; import android.util.Log; import java.io.File; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; public class AudioRecoderUtils { //文件路径 private String filePath; //文件夹路径 private String FolderPath; private MediaRecorder mMediaRecorder; private final String TAG = "fan"; public static final int MAX_LENGTH = 1000 * 60 * 10;// 最大录音时长1000*60*10; private OnAudioStatusUpdateListener audioStatusUpdateListener; /** * 文件存储默认sdcard/record */ public AudioRecoderUtils(){ //默认保存路径为/sdcard/record/下 this(Environment.getExternalStorageDirectory()+"/record/"); } public AudioRecoderUtils(String filePath) { File path = new File(filePath); if(!path.exists()) path.mkdirs(); this.FolderPath = filePath; } private long startTime; private long endTime; public static String getCurrentDate(String pattern) { SimpleDateFormat formatter = new SimpleDateFormat(pattern); Date curDate = new Date(System.currentTimeMillis());// 获取当前时间 String timestamp = formatter.format(curDate); return timestamp; } /** * 开始录音 使用amr格式 * 录音文件 * @return */ public void startRecord() { // 开始录音 /* ①Initial:实例化MediaRecorder对象 */ if (mMediaRecorder == null) mMediaRecorder = new MediaRecorder(); try { /* ②setAudioSource/setVedioSource */ mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置麦克风 /* ②设置音频文件的编码:AAC/AMR_NB/AMR_MB/Default 声音的(波形)的采样 */ mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT); /* * ②设置输出文件的格式:THREE_GPP/MPEG-4/RAW_AMR/Default THREE_GPP(3gp格式 * ,H263视频/ARM音频编码)、MPEG-4、RAW_AMR(只支持音频且音频编码要求为AMR_NB) */ mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); filePath = FolderPath + getCurrentDate("yyyy-MM-dd HH:mm:ss") + ".amr" ; /* ③准备 */ mMediaRecorder.setOutputFile(filePath); mMediaRecorder.setMaxDuration(MAX_LENGTH); mMediaRecorder.prepare(); /* ④开始 */ mMediaRecorder.start(); // AudioRecord audioRecord. /* 获取开始时间* */ startTime = System.currentTimeMillis(); updateMicStatus(); Log.e("fan", "startTime" + startTime); } catch (IllegalStateException e) { Log.i(TAG, "call startAmr(File mRecAudioFile) failed!" + e.getMessage()); } catch (IOException e) { Log.i(TAG, "call startAmr(File mRecAudioFile) failed!" + e.getMessage()); } } /** * 停止录音 */ public long stopRecord() { if (mMediaRecorder == null) return 0L; endTime = System.currentTimeMillis(); //有一些网友反应在5.0以上在调用stop的时候会报错,翻阅了一下谷歌文档发现上面确实写的有可能会报错的情况,捕获异常清理一下就行了,感谢大家反馈! try { mMediaRecorder.stop(); mMediaRecorder.reset(); mMediaRecorder.release(); mMediaRecorder = null; audioStatusUpdateListener.onStop(filePath); filePath = ""; }catch (RuntimeException e){ mMediaRecorder.reset(); mMediaRecorder.release(); mMediaRecorder = null; File file = new File(filePath); if (file.exists()) file.delete(); filePath = ""; } return endTime - startTime; } /** * 取消录音 */ public void cancelRecord(){ try { mMediaRecorder.stop(); mMediaRecorder.reset(); mMediaRecorder.release(); mMediaRecorder = null; }catch (RuntimeException e){ mMediaRecorder.reset(); mMediaRecorder.release(); mMediaRecorder = null; } File file = new File(filePath); if (file.exists()) file.delete(); filePath = ""; } private final Handler mHandler = new Handler(); private Runnable mUpdateMicStatusTimer = new Runnable() { public void run() { updateMicStatus(); } }; private int BASE = 1; private int SPACE = 100;// 间隔取样时间 public void setOnAudioStatusUpdateListener(OnAudioStatusUpdateListener audioStatusUpdateListener) { this.audioStatusUpdateListener = audioStatusUpdateListener; } /** * 更新麦克状态 */ private void updateMicStatus() { if (mMediaRecorder != null) { double ratio = (double)mMediaRecorder.getMaxAmplitude() / BASE; double db = 0;// 分贝 if (ratio > 1) { db = 20 * Math.log10(ratio); if(null != audioStatusUpdateListener) { audioStatusUpdateListener.onUpdate(db,System.currentTimeMillis()-startTime); } } mHandler.postDelayed(mUpdateMicStatusTimer, SPACE); } } public interface OnAudioStatusUpdateListener { /** * 录音中... * @param db 当前声音分贝 * @param time 录音时长 */ public void onUpdate(double db,long time); /** * 停止录音 * @param filePath 保存路径 */ public void onStop(String filePath); } }
使用时,要设置监听器:
mAudioRecoderUtils = new AudioRecoderUtils(); mAudioRecoderUtils.setOnAudioStatusUpdateListener(new AudioRecoderUtils.OnAudioStatusUpdateListener() { //录音中....db为声音分贝,time为录音时长 @Override public void onUpdate(double db, long time) { //根据分贝值来设置录音时话筒图标的上下波动,下面有讲解 // mImageView.getDrawable().setLevel((int) (3000 + 6000 * db / 100)); Bundle bundle = new Bundle(); bundle.putDouble("db", db); bundle.putLong("time", time); android.os.Message msg = new android.os.Message(); msg.what = UPDATE_RECORDING; msg.setData(bundle); mHandler.sendMessage(msg); } //录音结束,filePath为保存路径 @Override public void onStop(String filePath) { Toast.makeText(MainActivity.this, "录音保存在:" + filePath, Toast.LENGTH_SHORT).show(); tv_recording_time.setText("时间:0"); tv_recording_db.setText("分贝:0"); } });