【移動(dòng)應(yīng)用開發(fā)技術(shù)】Android怎么實(shí)現(xiàn)錄音功能

【移動(dòng)應(yīng)用開發(fā)技術(shù)】Android怎么實(shí)現(xiàn)錄音功能

這篇文章將為大家詳細(xì)講解有關(guān)Android怎么實(shí)現(xiàn)錄音功能，在下覺得挺實(shí)用的，因此分享給大家做個(gè)參考，希望大家閱讀完這篇文章后可以有所收獲。效果圖如下所示：使用方法：錄音工具類：AudioRecoderUtils.java，代碼如下：public

class

AudioRecoderUtils

{

//文件路徑

private

String

filePath;

//文件夾路徑

private

String

FolderPath;

private

MediaRecorder

mMediaRecorder;

private

final

String

TAG

=

"fan";

public

static

final

int

MAX_LENGTH

=

1000

*

60

*

10;//

最大錄音時(shí)長1000*60*10;

private

OnAudioStatusUpdateListener

audioStatusUpdateListener;

/**

*

文件存儲默認(rèn)sdcard/record

*/

public

AudioRecoderUtils(){

//默認(rèn)保存路徑為/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;

/**

*

開始錄音

使用amr格式

*

錄音文件

*

@return

*/

public

void

startRecord()

{

//

開始錄音

/*

①Initial：實(shí)例化MediaRecorder對象

*/

if

(mMediaRecorder

==

null)

mMediaRecorder

=

new

MediaRecorder();

try

{

/*

②setAudioSource/setVedioSource

*/

mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);//

設(shè)置麥克風(fēng)

/*

②設(shè)置音頻文件的編碼：AAC/AMR_NB/AMR_MB/Default

聲音的（波形）的采樣

*/

mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);

/*

*

②設(shè)置輸出文件的格式：THREE_GPP/MPEG-4/RAW_AMR/Default

THREE_GPP(3gp格式

*

，H263視頻/ARM音頻編碼)、MPEG-4、RAW_AMR(只支持音頻且音頻編碼要求為AMR_NB)

*/

mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

filePath

=

FolderPath

+

TimeUtils.getCurrentTime()

+

".amr"

;

/*

③準(zhǔn)備

*/

mMediaRecorder.setOutputFile(filePath);

mMediaRecorder.setMaxDuration(MAX_LENGTH);

mMediaRecorder.prepare();

/*

④開始

*/

mMediaRecorder.start();

//

AudioRecord

audioRecord.

/*

獲取開始時(shí)間*

*/

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());

}

}

/**

*

停止錄音

*/

public

long

stopRecord()

{

if

(mMediaRecorder

==

null)

return

0L;

endTime

=

System.currentTimeMillis();

//有一些網(wǎng)友反應(yīng)在5.0以上在調(diào)用stop的時(shí)候會報(bào)錯(cuò)，翻閱了一下谷歌文檔發(fā)現(xiàn)上面確實(shí)寫的有可能會報(bào)錯(cuò)的情況，捕獲異常清理一下就行了，感謝大家反饋！

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;

}

/**

*

取消錄音

*/

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;//

間隔取樣時(shí)間

public

void

setOnAudioStatusUpdateListener(OnAudioStatusUpdateListener

audioStatusUpdateListener)

{

this.audioStatusUpdateListener

=

audioStatusUpdateListener;

}

/**

*

更新麥克狀態(tài)

*/

private

void

updateMicStatus()

{

if

(mMediaRecorder

!=

null)

{

double

ratio

=

(double)mMediaRecorder.getMaxAmplitude()

/

BASE;

double

db

=

0;//

分貝

if

(ratio

>

1)

{

db

=

20

*

Math.log10(ratio);

if(null

!=

audioStatusUpdateListener)

{

audioStatusUpdateListener.onUpdate(db,System.currentTimeMillis()-startTime);

}

}

mHandler.postDelayed(mUpdateMicStatusTimer,

SPACE);

}

}

public

interface

OnAudioStatusUpdateListener

{

/**

*

錄音中...

*

@param

db

當(dāng)前聲音分貝

*

@param

time

錄音時(shí)長

*/

public

void

onUpdate(double

db,long

time);

/**

*

停止錄音

*

@param

filePath

保存路徑

*/

public

void

onStop(String

filePath);

}

}使用很簡單，主要就是開始錄音startRecord()、取消錄音cancelRecord()、結(jié)束錄音stopRecord()和錄音監(jiān)聽setOnAudioStatusUpdateListener(),注意，取消錄音不保存文件，結(jié)束錄音會保存文件！在布局文件中添加一個(gè)控件（任意一個(gè)都行）<Button

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="按住說話"

android:textColor="@android:color/white"

android:id="@+id/button"

android:background="@color/colorPrimary"

/>在Activity中使用：

//當(dāng)前布局文件的根layout

final

RelativeLayout

rl

=

(RelativeLayout)

findViewById(R.id.rl);

mButton

=

(Button)

findViewById(R.id.button);

//PopupWindow的布局文件

final

View

view

=

View.inflate(this,

R.layout.layout_microphone,

null);

final

PopupWindowFactory

mPop

=

new

PopupWindowFactory(this,view);

//PopupWindow布局文件里面的控件

mImageView

=

(ImageView)

view.findViewById(R.id.iv_recording_icon);

mTextView

=

(TextView)

view.findViewById(R.id.tv_recording_time);

mAudioRecoderUtils

=

new

AudioRecoderUtils();

//錄音回調(diào)

mAudioRecoderUtils.setOnAudioStatusUpdateListener(new

AudioRecoderUtils.OnAudioStatusUpdateListener()

{

//錄音中db為聲音分貝，time為錄音時(shí)長

@Override

public

void

onUpdate(double

db,

long

time)

{

//根據(jù)分貝值來設(shè)置錄音時(shí)話筒圖標(biāo)的上下波動(dòng)，下面有講解

mImageView.getDrawable().setLevel((int)

(3000

+

6000

*

db

/

100));

mTextView.setText(TimeUtils.long2String(time));

}

//錄音結(jié)束，filePath為保存路徑

@Override

public

void

onStop(String

filePath)

{

Toast.makeText(MainActivity.this,

"錄音保存在："

+

filePath,

Toast.LENGTH_SHORT).show();

mTextView.setText(TimeUtils.long2String(0));

}

});

//Button的touch監(jiān)聽

mButton.setOnTouchListener