package?com.shushan.util;

import?android.media.AudioFormat;
import?android.media.AudioRecord;
import?android.media.MediaRecorder;
import?android.os.Environment;

import?java.io.BufferedOutputStream;
import?java.io.ByteArrayOutputStream;
import?java.io.File;
import?java.io.FileInputStream;
import?java.io.FileNotFoundException;
import?java.io.FileOutputStream;
import?java.io.IOException;
import?java.io.OutputStream;

/**
?*?@ClassName:?AudioRecordUtil
?*?@Desciption:?//錄制wav格式音頻
?*?@author:?zhangshihao
?*?@date:?2018-07-21
?*/
public?class?AudioRecordUtil?{

????private?static?AudioRecordUtil?mInstance;
????private?AudioRecord?recorder;
????//錄音源
????private?static?int?audioSource?=?MediaRecorder.AudioSource.MIC;
????//錄音的采樣頻率
????private?static?int?audioRate?=?16000;
????//錄音的聲道，單聲道
????private?static?int?audioChannel?=?AudioFormat.CHANNEL_IN_MONO;
????//量化的深度
????private?static?int?audioFormat?=?AudioFormat.ENCODING_PCM_16BIT;
????//緩存的大小
????private?static?int?bufferSize?=?AudioRecord.getMinBufferSize（audioRateaudioChannelaudioFormat）;
????//記錄播放狀態
????private?boolean?isRecording?=?false;
????//數字信號數組
????private?byte?[]?noteArray;
????//PCM文件
????private?File?pcmFile;
????//WAV文件
????private?File?wavFile;
????//文件輸出流
????private?OutputStream?os;
????//文件根目錄
????private?String?basePath?=?Environment.getExternalStorageDirectory（）.getAbsolutePath（）+“/eva/“;

????//wav文件目錄
????private?String?outFileName?=?basePath+“/eva.wav“;

????//pcm文件目錄
????private?String?inFileName?=?basePath+“/eva.pcm“;

????private?AudioRecordUtil（）{
????????createFile（）;//創建文件
????????recorder?=?new?AudioRecord（audioSourceaudioRateaudioChannelaudioFormatbufferSize）;
????}

????public?synchronized?static?AudioRecordUtil?getInstance（）{
????????if（mInstance?==?null）{
????????????mInstance?=?new?AudioRecordUtil（）;
????????}
????????return?mInstance;
????}

????//讀取錄音數字數據線程
????class?WriteThread?implements?Runnable{
????????public?void?run（）{
????????????writeData（）;
????????}
????}

????//開始錄音
????public?void?startRecord（）{
????????isRecording?=?true;
????????recorder.startRecording（）;
????}

????//停止錄音
????public?void?stopRecord（）{
????????isRecording?=?false;
????????recorder.stop（）;
????}

????//將數據寫入文件夾文件的寫入沒有做優化
????public?void?writeData（）{
????????noteArray?=?new?byte[bufferSize];
????????//建立文件輸出流
????????try?{
????????????os?=?new?BufferedOutputStream（new?FileOutputStream（pcmFile））;
????????}catch?（IOException?e）{

????????}
????????while（isRecording?==?true）{
????????????int?recordSize?=?recorder.read（noteArray0bufferSize）;
????????????if（recordSize>0）{
????????????????try{
????????????????????os.write（noteArray）;
????????????????}catch（IOException?e）{

????????????????}
????????????}
????????}
????????if?（os?!=?null）?{
????????????try?{
????????????????os.close（）;
????????????}catch?（IOException?e）{

????????????}
????????}
????}

????//?這里得到可播放的

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????11029??2018-08-21?09:32??SpeakingExamFragment.java

?????文件???????3436??2018-08-14?09:47??SpeechEvaluatorUtil.java

?????文件???????8609??2018-08-21?10:03??AudioRecordUtil.java

-----------?---------??----------?-----??----

????????????????23074????????????????????3