android 音频处理之录音

录音有3种方式：https://www.cnblogs.com/wzzkaifa/p/7298608.html

 

下面是给大家，通过MediaRecorder来进行音频的录制 aar格式的音频。我封装一个类给大家。

 

public class Recorder {
    MediaRecorder   mediaRecorder;
    private static Recorder instance;
    private File mAudioFile;
    private RecordViewDialog recordViewDialog;
    private RecordListener recordListener;
    long mStartRecordTime;
    long mStopRecordTime;

    Context mContext;
    MediaPlayer mMediaPlayer;
    private Recorder(  Context context) {
        mContext =context;
    }

    public static synchronized Recorder getInstance( Context context) {
        if (instance == null) {
            instance = new Recorder(context);
        }
        return instance;
    }

    public Recorder setListener(RecordListener listener) {
        recordListener = listener;
        return instance;
    }

    public void start(Context context) {

        record(context);
        recordViewDialog = new RecordViewDialog(context, R.style.Dialog, onClickListener);
        recordViewDialog.show();
    }

    /**
     * 开始录音
     */
    @SuppressLint("WrongConstant")
    private void record(Context mContext){
      //  File file = new File("/sdcard/mediarecorder.amr");
        if (!Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){
            Toast.makeText(mContext,"SD卡不存在，请插入SD卡！",5000).show();
            return;
        }

        //释放之前录音的recorder
        releaseRecorder();
        //执行录音逻辑，如果失败 提示用户
        if (!doStart()) {
            recordFail(mContext);
        }
    }

    private boolean doStart() {
        try {
            //创建mediaRecorder
            mediaRecorder = new MediaRecorder();
            //创建录音文件
            mAudioFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/yinping/" + "lunzhi.aac");
            mAudioFile.getParentFile().mkdirs();
            mAudioFile.createNewFile();
            //配置Media Recorder
            mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
            mediaRecorder.setAudioSamplingRate(44100);
            mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
            mediaRecorder.setAudioEncodingBitRate(96000);
            //设置录音文件的位置
            mediaRecorder.setOutputFile(mAudioFile.getAbsolutePath());
            //开始录音
            mediaRecorder.prepare();
            mediaRecorder.start();
            //记录开始录音时间 用于统计时长
            mStartRecordTime = System.currentTimeMillis();

        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }


        return true;
    }

    private boolean doStop() {
        //停止录音
        try {
            mediaRecorder.stop();
            //记录停止时间


                handler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        if (recordViewDialog != null) recordViewDialog.dismiss();
                    }
                }, 100);

            //停止成功
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }

        return true;

    }
    /**
     * 停止录音
     */
    private void stop2(){




        //执行停止录音逻辑，失败就要提醒用户
        if (!doStop()) {
            recordFail(mContext);
        }
        //释放recorder
        releaseRecorder();
    }

    private void releaseRecorder() {
        //检查mediaRecorder不为空
        if (mediaRecorder != null) {
            mediaRecorder.release();
            mediaRecorder = null;
        }

    }

    private View.OnClickListener onClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            stop2();
            int i = v.getId();
            if (i == R.id.ok) {
                mStopRecordTime=System.currentTimeMillis();
                //只接受超过三秒的录音
                final int second = (int) (mStopRecordTime - mStartRecordTime)/1000;
                if (second>3){
                    recordListener.onComplete(mAudioFile.getAbsolutePath(),second);
                } else {
                 //   recordListener.onComplete("",second);
                    Tools.toast(mContext,"说话时长小于3秒！");
                }


            } else if (i == R.id.delete) {
               recordListener.onCancel();
            }
        }
    };

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
        }
    };

    private void recordFail(Context mContext) {
        mAudioFile = null;
        Toast.makeText(mContext, "录音失败", Toast.LENGTH_SHORT).show();

    }

    public void startPlay(String audioFile) {
        //配置播放器

        
        mMediaPlayer = new MediaPlayer();
        try {

            //设置声音文件
            mMediaPlayer.setDataSource(audioFile);
            //设置监听回掉
            mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    stopPlay();
                }
            });

            mMediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
                @Override
                public boolean onError(MediaPlayer mp, int what, int extra) {
                    //提示用户 释放播放器
                    playFail();
                    stopPlay();
                    return true;
                }
            });

            //配置音量 是否循环
            mMediaPlayer.setVolume(1, 1);
            mMediaPlayer.setLooping(false);

            //准备 开始
            mMediaPlayer.prepare();
            mMediaPlayer.start();
        } catch (RuntimeException e) {
            e.printStackTrace();
            //异常处理防止闪退
            playFail();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void stopPlay() {
        //重置播放状态
        if (mMediaPlayer != null) {
            mMediaPlayer.setOnCompletionListener(null);
            mMediaPlayer.setOnErrorListener(null);
            mMediaPlayer.stop();
            mMediaPlayer.reset();
            mMediaPlayer.release();
            mMediaPlayer = null;
        }
    }
    private void playFail() {
        Toast.makeText(mContext, "播放失败", Toast.LENGTH_SHORT).show();
    }

}