[移动开发]Android MediaRecorder录音和MediaPlayer播放

用Android源生的Api做个简单的录音播放。

private var mMediaRecorder: MediaRecorder? = null

    private fun startRecord(duration: Int) {
        try {
            stopRecord()
            if (mMediaRecorder == null) {
                mMediaRecorder = MediaRecorder()
            }
            mMediaRecorder!!.setAudioSource(MediaRecorder.AudioSource.MIC) // 设置麦克风
            mMediaRecorder!!.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT)
            mMediaRecorder!!.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT)
            val destDir = File(CommonConstant.PHOTO_PATH) //文件路径
            if (!destDir.exists()) {
                destDir.mkdirs()
            }
            val file = File(CommonConstant.PHOTO_PATH + "testMic.mp3")
            if (!file.exists()) {
                file.createNewFile()
            }
            mMediaRecorder!!.setOutputFile(file.absolutePath)
            mMediaRecorder!!.setMaxDuration(duration * 1000) //最大持续时间
            mMediaRecorder!!.prepare()
            mMediaRecorder!!.start()
            mHandler?.postDelayed({
                stopRecord()
            }, (duration * 1000).toLong())

        } catch (e: IllegalStateException) {
            e.printStackTrace()
        } catch (e: IOException) {
            e.printStackTrace()
        }
    }

    //停止录音
    private fun stopRecord() {
        if (mMediaRecorder != null) {
            mMediaRecorder!!.stop()
            mMediaRecorder!!.reset()
            mMediaRecorder!!.release()
            mMediaRecorder = null
        }
    }

播放：

public void testMicAudio() {
        try {
            File file = new File(CommonConstant.PHOTO_PATH + "/testMic.mp3");
            final MediaPlayer mediaPlayer = new MediaPlayer();
            mediaPlayer.setDataSource(file.getAbsolutePath());
            mediaPlayer.setLooping(false);
            mediaPlayer.prepareAsync();

            mediaPlayer.setOnPreparedListener(mp -> {
                mp.start();
                MagicLog.d("------------------begin");
            });
            mediaPlayer.setOnCompletionListener(mp -> {
                MagicLog.d("------------------onCompletion release");
                mediaPlayer.release();
            });
            mediaPlayer.setOnErrorListener((mp, what, extra) -> {
                MagicLog.e("-----mediaPlayer onError");
                return false;
            });

            MagicLog.d("开始播放");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }