通过writeaudio方法将录音识别成文字（使用讯飞的SDK）

因为这个demo用到了讯飞语音，所以需要申请讯飞的key值，另外对录音的格式也有一定的要求：16bit，16000hz，单声道的pcm文件，因为布局只有一个button和两个Textview，其中两个textview显示的结果不一样，用不到的同学可自行去掉，另外还需要添加权限，导入jar包，所以就不上传了。下面就是代码：

import java.io.FileInputStream;

import java.io.IOException;

import java.util.ArrayList;

import org.json.JSONArray;

import org.json.JSONObject;

import org.json.JSONTokener;

import com.iflytek.cloud.InitListener;

import com.iflytek.cloud.RecognizerListener;

import com.iflytek.cloud.RecognizerResult;

import com.iflytek.cloud.SpeechConstant;

import com.iflytek.cloud.SpeechError;

import com.iflytek.cloud.SpeechRecognizer;

import com.iflytek.cloud.SpeechUtility;

import android.os.Bundle;

import android.os.Environment;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.app.ProgressDialog;

import android.content.Context;

import android.util.Log;

import android.view.KeyEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.TextView;

@SuppressLint("NewApi")

public class MainActivity extends Activity implements OnClickListener {

private SpeechRecognizer mSpeech;

private TextView recognizertext, allreult;

private ProgressDialog progressDialog;

private StringBuffer ret1, ret2;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

findViewById(R.id.recognizerB).setOnClickListener(this);

recognizertext = (TextView) findViewById(R.id.recognizertext);

allreult = (TextView) findViewById(R.id.allreult);

SpeechUtility.createUtility(MainActivity.this, "appid=12345678");

mSpeech = SpeechRecognizer.createRecognizer(this, mInitListener);

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

switch (v.getId()) {

case R.id.recognizerB:

progressDialog = ProgressDialog.show(MainActivity.this, null,

"正在识别...", true);

recognizertext.setText(null);

allreult.setText(null);

findViewById(R.id.recognizerB).setEnabled(false);

String file_path = Environment.getExternalStorageDirectory()

.getAbsolutePath() + "/reverseme.pcm";

byte[] data = readFileFromSDcard(MainActivity.this, file_path);

ArrayList<byte[]> buffers = splitBuffer(data, data.length, 1280);

writeaudio(buffers);

break;

default:

break;

}

}

private byte[] readFileFromSDcard(Context context, String filepath) {

byte[] buffer = null;

FileInputStream in = null;

try {

in = new FileInputStream(filepath);

buffer = new byte[in.available()];

in.read(buffer);

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (in != null) {

in.close();

in = null;

}

} catch (IOException e) {

e.printStackTrace();

}

}

return buffer;

}

public ArrayList<byte[]> splitBuffer(byte[] buffer, int length, int spsize) {

ArrayList<byte[]> array = new ArrayList<byte[]>();

if (spsize <= 0 || length <= 0 || buffer == null

|| buffer.length < length)

return array;

int size = 0;

while (size < length) {

int left = length - size;

if (spsize < left) {

byte[] sdata = new byte[spsize];

System.arraycopy(buffer, size, sdata, 0, spsize);

array.add(sdata);

size += spsize;

} else {

byte[] sdata = new byte[left];

System.arraycopy(buffer, size, sdata, 0, left);

array.add(sdata);

size += left;

}

}

return array;

}

public void writeaudio(final ArrayList<byte[]> buffers) {

new Thread(new Runnable() {

@Override

public void run() {

mSpeech.setParameter(SpeechConstant.DOMAIN, "iat");

mSpeech.setParameter(SpeechConstant.LANGUAGE, "zh_cn");

mSpeech.setParameter(SpeechConstant.AUDIO_SOURCE, "-1");

// 设置多个候选结果

mSpeech.setParameter(SpeechConstant.ASR_NBEST, "3");

mSpeech.setParameter(SpeechConstant.ASR_WBEST, "3");

mSpeech.startListening(mRecognizerListener);

for (int i = 0; i < buffers.size(); i++) {

try {

mSpeech.writeAudio(buffers.get(i), 0,

buffers.get(i).length);

Thread.sleep(40);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

mSpeech.stopListening();

}

}).start();

}

/**

* 初始化监听器。

*/

private InitListener mInitListener = new InitListener() {

@Override

public void onInit(int code) {

Log.d("mytest", "SpeechRecognizer init() code = " + code);

}

};

public RecognizerListener mRecognizerListener = new RecognizerListener() {

@Override

public void onBeginOfSpeech() {

// TODO Auto-generated method stub

}

@Override

public void onEndOfSpeech() {

// TODO Auto-generated method stub

}

@Override

public void onEvent(int arg0, int arg1, int arg2, String arg3) {

// TODO Auto-generated method stub

}

@Override

public void onVolumeChanged(int arg0) {

// TODO Auto-generated method stub

}

@Override

public void onError(SpeechError arg0) {

// TODO Auto-generated method stub

findViewById(R.id.recognizerB).setEnabled(true);

}

@Override

public void onResult(RecognizerResult results, boolean arg1) {

// 正确的结果

String text = parseIatResult(results.getResultString());

recognizertext.append(text);

// 不标准结果

allreult.append(ret2.toString());

if (arg1) {

progressDialog.dismiss();

findViewById(R.id.recognizerB).setEnabled(true);

String text1, text2;

text1 = recognizertext.getText().toString();

text2 = allreult.getText().toString();

boolean isequls = text1.regionMatches(true, 0, text2, 0, 0);

Log.i("joResult", "isequls=" + isequls);

}

}

};

private String parseIatResult(String json) {

ret1 = new StringBuffer();

ret2 = new StringBuffer();

try {

JSONTokener tokener = new JSONTokener(json);

JSONObject joResult = new JSONObject(tokener);

Log.i("joResult", "joResult:" + joResult.toString());

JSONArray words = joResult.getJSONArray("ws");

for (int i = 0; i < words.length(); i++) {

// 转写结果词，默认使用第一个结果

JSONArray items = words.getJSONObject(i).getJSONArray("cw");

JSONObject obj = items.getJSONObject(0);

ret1.append(obj.getString("w"));

Log.i("joResult", "items.length():" + items.length());

switch (items.length()) {

case 1:

JSONObject obj1 = items.getJSONObject(0);

ret2.append(obj1.getString("w"));

break;

case 2:

JSONObject obj2 = items.getJSONObject(1);

ret2.append(obj2.getString("w"));

break;

}

}

} catch (Exception e) {

e.printStackTrace();

}

return ret1.toString();

}

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {

mSpeech.stopListening();

progressDialog.dismiss();

return true;

}

return super.onKeyDown(keyCode, event);

}

}