안드로이드 녹음(MediaRecorder) 예제 따라하기

- MediaRecorder를 이용해서 녹음,재생이 되는 간단한 예제이다.
- 이 예제를 통해서 녹음 App을 개발하여 보자.

-Java 소스

public class ProgressRecorder extends Activity implements View.OnClickListener,

OnCompletionListener {

private static final int REC_STOP = 0;

private static final int RECORDING = 1;

private static final int PLAY_STOP = 0;

private static final int PLAYING = 1;

private static final int PLAY_PAUSE = 2;

private MediaRecorder mRecorder = null;

private MediaPlayer mPlayer = null;

private int mRecState = REC_STOP;

private int mPlayerState = PLAY_STOP;

private SeekBar mRecProgressBar, mPlayProgressBar;

private Button mBtnStartRec, mBtnStartPlay;

private String mFilePath, mFileName = "test.amr";

private TextView mTvPlayMaxPoint;

private int mCurRecTimeMs = 0;

private int mCurProgressTimeDisplay = 0;

// 녹음시 SeekBar처리

Handler mProgressHandler = new Handler() {

public void handleMessage(Message msg) {

mCurRecTimeMs = mCurRecTimeMs + 100;

mCurProgressTimeDisplay = mCurProgressTimeDisplay + 100;

// 녹음시간이 음수이면 정지버튼을 눌러 정지시켰음을 의미하므로

// SeekBar는 그대로 정지시키고 레코더를 정지시킨다.

if (mCurRecTimeMs < 0) {

}

// 녹음시간이 아직 최대녹음제한시간보다 작으면 녹음중이라는 의미이므로

// SeekBar의 위치를 옮겨주고 0.1초 후에 다시 체크하도록 한다.

else if (mCurRecTimeMs < 60000) {

mRecProgressBar.setProgress(mCurProgressTimeDisplay);

mProgressHandler.sendEmptyMessageDelayed(0, 100);

}

// 녹음시간이 최대 녹음제한 시간보다 크면 녹음을 정지 시킨다.

else {

mBtnStartRecOnClick();

}

}

};

// 재생시 SeekBar 처리

Handler mProgressHandler2 = new Handler() {

public void handleMessage(Message msg) {

if (mPlayer == null)

return;

try {

if (mPlayer.isPlaying()) {

mPlayProgressBar.setProgress(mPlayer.getCurrentPosition());

mProgressHandler2.sendEmptyMessageDelayed(0, 100);

} else {

mPlayer.release();

mPlayer = null;

updateUI();

}

} catch (IllegalStateException e) {

} catch (Exception e) {

}

}

};

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

// SD카드에 디렉토리를 만든다.

mFilePath = SunUtil.makeDir("progress_recorder");

mBtnStartRec = (Button) findViewById(R.id.btnStartRec);

mBtnStartPlay = (Button) findViewById(R.id.btnStartPlay);

mRecProgressBar = (SeekBar) findViewById(R.id.recProgressBar);

mPlayProgressBar = (SeekBar) findViewById(R.id.playProgressBar);

mTvPlayMaxPoint = (TextView) findViewById(R.id.tvPlayMaxPoint);

mBtnStartRec.setOnClickListener(this);

mBtnStartPlay.setOnClickListener(this);

}

// 버튼의 OnClick 이벤트 리스너

public void onClick(View v) {

switch (v.getId()) {

case R.id.btnStartRec:

mBtnStartRecOnClick();

break;

case R.id.btnStartPlay:

mBtnStartPlayOnClick();

break;

default:

break;

}

}

private void mBtnStartRecOnClick() {

if (mRecState == REC_STOP) {

mRecState = RECORDING;

startRec();

updateUI();

} else if (mRecState == RECORDING) {

mRecState = REC_STOP;

stopRec();

updateUI();

}

}

// 녹음시작

private void startRec() {

mCurRecTimeMs = 0;

mCurProgressTimeDisplay = 0;

// SeekBar의 상태를 0.1초후 체크 시작

mProgressHandler.sendEmptyMessageDelayed(0, 100);

if (mRecorder == null) {

mRecorder = new MediaRecorder();

mRecorder.reset();

} else {

mRecorder.reset();

}

try {

mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

mRecorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);

mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

mRecorder.setOutputFile(mFilePath + mFileName);

mRecorder.prepare();

mRecorder.start();

} catch (IllegalStateException e) {

Toast.makeText(this, "IllegalStateException", 1).show();

} catch (IOException e) {

Toast.makeText(this, "IOException", 1).show();

}

}

// 녹음정지

private void stopRec() {

try {

mRecorder.stop();

} catch (Exception e) {

} finally {

mRecorder.release();

mRecorder = null;

}

mCurRecTimeMs = -999;

// SeekBar의 상태를 즉시 체크

mProgressHandler.sendEmptyMessageDelayed(0, 0);

}

private void mBtnStartPlayOnClick() {

if (mPlayerState == PLAY_STOP) {

mPlayerState = PLAYING;

startPlay();

updateUI();

} else if (mPlayerState == PLAYING) {

mPlayerState = PLAY_STOP;

stopPlay();

updateUI();

}

}

// 재생 시작

private void startPlay() {

// 미디어 플레이어 생성

if (mPlayer == null)

mPlayer = new MediaPlayer();

else

mPlayer.reset();

mPlayer.setOnCompletionListener(this);

String fullFilePath = mFilePath + mFileName;

Log.v("ProgressRecorder", "녹음파일명 ==========> " + fullFilePath);

try {

mPlayer.setDataSource(fullFilePath);

mPlayer.prepare();

int point = mPlayer.getDuration();

mPlayProgressBar.setMax(point);

int maxMinPoint = point / 1000 / 60;

int maxSecPoint = (point / 1000) % 60;

String maxMinPointStr = "";

String maxSecPointStr = "";

if (maxMinPoint < 10)

maxMinPointStr = "0" + maxMinPoint + ":";

else

maxMinPointStr = maxMinPoint + ":";

if (maxSecPoint < 10)

maxSecPointStr = "0" + maxSecPoint;

else

maxSecPointStr = String.valueOf(maxSecPoint);

mTvPlayMaxPoint.setText(maxMinPointStr + maxSecPointStr);

} catch (Exception e) {

Log.v("ProgressRecorder", "미디어 플레이어 Prepare Error ==========> " + e);

}

if (mPlayerState == PLAYING) {

mPlayProgressBar.setProgress(0);

try {

// SeekBar의 상태를 0.1초마다 체크

mProgressHandler2.sendEmptyMessageDelayed(0, 100);

mPlayer.start();

} catch (Exception e) {

Toast.makeText(this, "error : " + e.getMessage(), 0).show();

}

}

}

private void stopPlay() {

// 재생을 중지하고

mPlayer.stop();

mPlayer.release();

mPlayer = null;

mPlayProgressBar.setProgress(0);

// 즉시 SeekBar 메세지 핸들러를 호출한다.

mProgressHandler2.sendEmptyMessageDelayed(0, 0);

}

public void onCompletion(MediaPlayer mp) {

mPlayerState = PLAY_STOP; // 재생이 종료됨

// 재생이 종료되면 즉시 SeekBar 메세지 핸들러를 호출한다.

mProgressHandler2.sendEmptyMessageDelayed(0, 0);

}

private void updateUI() {

if (mRecState == REC_STOP) {

mBtnStartRec.setText("Rec");

mRecProgressBar.setProgress(0);

} else if (mRecState == RECORDING)

mBtnStartRec.setText("Stop");

if (mPlayerState == PLAY_STOP) {

mBtnStartPlay.setText("Play");

mPlayProgressBar.setProgress(0);

} else if (mPlayerState == PLAYING)

mBtnStartPlay.setText("Stop");

}

}
-------------------------------------------------------------------------------------------------------

public class SunUtil {

// 디렉토리를 만든다.

public static String makeDir(String dirName) {

String mRootPath = Environment.getExternalStorageDirectory()

.getAbsolutePath() + File.separator + dirName;

try {

File fRoot = new File(mRootPath);

if (fRoot.exists() == false) {

if (fRoot.mkdirs() == false) {

throw new Exception("");

}

}

} catch (Exception e) {

mRootPath = "-1";

}

return mRootPath + "/";

}

}

--------------------------------------------------------------------------------------------------------
-xml 소스

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <!-- progress bar -->

    <LinearLayout

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:background="@null"

        android:gravity="center_vertical|center_horizontal"

        android:orientation="vertical" >

        <SeekBar

            android:id="@+id/recProgressBar"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:layout_gravity="center_vertical|center_horizontal"

            android:max="60000"

            android:padding="10dp"

            android:progress="0" />

        <RelativeLayout

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:background="@null"

            android:gravity="center_vertical"

            android:orientation="vertical" >

            <TextView

                android:id="@+id/tvRecStartPoint"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_alignParentLeft="true"

                android:layout_gravity="center_vertical|left"

                android:text="00:00"

                android:textColor="#FFFFFF"

                android:textSize="12sp" />

            <TextView

                android:id="@+id/tvRecMaxPoint"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_alignParentRight="true"

                android:layout_gravity="center_vertical|right"

                android:text="01:00"

                android:textColor="#FFFFFF"

                android:textSize="12sp" />

        </RelativeLayout>

    </LinearLayout>

    <LinearLayout

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:background="@null"

        android:gravity="center_vertical|center_horizontal"

        android:orientation="horizontal" >

        <Button

            android:id="@+id/btnStartRec"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:text="Rec"

            android:textSize="14sp" />

    </LinearLayout>

    <!-- progress bar -->

    <LinearLayout

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:background="@null"

        android:gravity="center_vertical|center_horizontal"

        android:orientation="vertical" >

        <SeekBar

            android:id="@+id/playProgressBar"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:layout_gravity="center_vertical|center_horizontal"

            android:max="60000"

            android:padding="10dp"

            android:progress="0" />

        <RelativeLayout

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:background="@null"

            android:gravity="center_vertical"

            android:orientation="vertical" >

            <TextView

                android:id="@+id/tvPlayStartPoint"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_alignParentLeft="true"

                android:layout_gravity="center_vertical|left"

                android:text="00:00"

                android:textColor="#FFFFFF"

                android:textSize="12sp" />

            <TextView

                android:id="@+id/tvPlayMaxPoint"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_alignParentRight="true"

                android:layout_gravity="center_vertical|right"

                android:text="01:00"

                android:textColor="#FFFFFF"

                android:textSize="12sp" />

        </RelativeLayout>

    </LinearLayout>

    <LinearLayout

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:background="@null"

        android:gravity="center_vertical|center_horizontal"

        android:orientation="horizontal" >

        <Button

            android:id="@+id/btnStartPlay"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:text="Play"

            android:textSize="14sp" />

    </LinearLayout>

</LinearLayout> 
--------------------------------------------------------------------------------------------------------
- AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="Smarthangles.org"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:name=".ProgressRecorder"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

    <uses-permission android:name="android.permission.RECORD_AUDIO" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

</manifest>

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