android 调用系统自带录音实现，语音录制与播放

相关权限：

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

添加布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/activity_main"    android:orientation="vertical"    android:layout_width="match_parent"

    android:layout_height="match_parent"    tools:context="example.com.recorder.MainActivity">    <Button        android:text="播放录音"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textSize="20dp"        android:id="@+id/btn_three_play" />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/btn_three_recorder"        android:textSize="20dp"        android:text="开始录音并保存" />    <TextView        android:id="@+id/tv_progress3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:textSize="40sp"        android:textStyle="bold"        android:text="0"/>LinearLayout>

MainActivity.class 代码如下

public class MainActivity extends Activity implements MediaPlayer.OnCompletionListener, MediaPlayer.OnPreparedListener {    private MediaPlayer mediaPlayer;    private boolean isRecording = false;    private TextView mTv_progress3;    Button btn_three_play, btn_three_recorder;    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btn_three_play = (Button) findViewById(R.id.btn_three_play);        btn_three_recorder = (Button) findViewById(R.id.btn_three_recorder);        mTv_progress3 = (TextView) findViewById(R.id.tv_progress3);        mediaPlayer = new MediaPlayer();        mediaPlayer.setOnCompletionListener(this);        mediaPlayer.setOnPreparedListener(this);

        btn_three_play.setEnabled(false);        btn_three_play.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                playRecorder();            }        });        btn_three_recorder.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                try {                    recorder_Audio();                    btn_three_play.setEnabled(true);                } catch (IOException e) {                    e.printStackTrace();                }            }        });    }    private boolean isPlaying = false;    private int frequency = 11025;    int audioFormat = AudioFormat.ENCODING_PCM_16BIT;    int audiosource = MediaRecorder.AudioSource.MIC;    int channelConfig = AudioFormat.CHANNEL_CONFIGURATION_MONO;    File recordingFile = null;    MainActivity.RecordAudio recordAudio = null;    MainActivity.PlayAudio playAudio = null;    public void recorder_Audio() throws IOException {        //AudioRecord不会直接保存音频，需要自己保存        File path = new File(Environment.getExternalStorageDirectory().getAbsolutePath());        path.mkdirs();        try {            recordingFile = File.createTempFile("recording", ".pcm", path);        } catch (IOException e) {            e.printStackTrace();        }        recordAudio = new MainActivity.RecordAudio();        recordAudio.execute();    }    public void playRecorder() {        isRecording = false;        playAudio = new MainActivity.PlayAudio();        playAudio.execute();    }    public void onCompletion(MediaPlayer mp) {    }    public void onPrepared(MediaPlayer mp) {        mediaPlayer.start();    }    private class PlayAudio extends AsyncTask {        @Override        protected Void doInBackground(Void... params) {            isPlaying = true;            int bufferSize = AudioTrack.getMinBufferSize(frequency, channelConfig, audioFormat);            short[] buffer = new short[bufferSize / 4];            DataInputStream dis = null;            try {                dis = new DataInputStream(new BufferedInputStream(new FileInputStream(recordingFile)));            } catch (FileNotFoundException e) {                e.printStackTrace();            }            AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, frequency, channelConfig, audioFormat, bufferSize, AudioTrack.MODE_STREAM);            audioTrack.play();            try {                while (isPlaying && dis.available() > 0) {                    int i = 0;                    while (dis.available() > 0 && i < buffer.length) {                        buffer[i] = dis.readShort();                        i++;                    }                    audioTrack.write(buffer, 0, buffer.length);                }                dis.close();            } catch (IOException e) {                e.printStackTrace();            }            return null;        }        @Override        protected void onPreExecute() {            super.onPreExecute();            Toast.makeText(MainActivity.this, "语音开始播放", Toast.LENGTH_SHORT).show();        }        @Override        protected void onPostExecute(Void aVoid) {            super.onPostExecute(aVoid);            Toast.makeText(MainActivity.this, "语音播放完了", Toast.LENGTH_SHORT).show();        }    }    private class RecordAudio extends AsyncTask {        @Override        protected Void doInBackground(Void... params) {            isRecording = true;            DataOutputStream dos = null;            try {                dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(recordingFile)));                int bufferSize = AudioRecord.getMinBufferSize(frequency, channelConfig, audioFormat);                AudioRecord audioRecord = new AudioRecord(audiosource, frequency, channelConfig, audioFormat, bufferSize);                short[] buffer = new short[bufferSize];                audioRecord.startRecording();                int r = 0;                while (isRecording) {                    int bufferReadResult = audioRecord.read(buffer, 0, bufferSize);                    for (int i = 0; i < bufferReadResult; i++) {                        try {                            dos.writeShort(buffer[i]);                        } catch (IOException e) {                            e.printStackTrace();                        }                    }                    publishProgress(new Integer(r));                    r++;                }                audioRecord.stop();                dos.close();            } catch (Exception e) {                e.printStackTrace();            }            return null;        }        @Override        protected void onPreExecute() {            super.onPreExecute();            Toast.makeText(MainActivity.this, "正在录音", Toast.LENGTH_SHORT).show();        }        @Override        protected void onProgressUpdate(Integer... values) {            super.onProgressUpdate(values);            mTv_progress3.setText(values[0] + "");        }    }}

其中先设置播放按钮为不可点击，录音后才可点击，不然会报空指针异常

或者可以用按住录音松开播放来实现代码如下

btn_three_recorder .setOnTouchListener(new View.OnTouchListener() {

@Override public boolean onTouch(View view, MotionEvent motionEvent) {

       switch (motionEvent.getAction()) {

   case MotionEvent.ACTION_DOWN: //按下

   try {

   recorder_Audio();

        } catch (IOException e) {

                 e.printStackTrace();

    break;

  case MotionEvent.ACTION_MOVE: //移动

       break;

  case MotionEvent.ACTION_UP: //抬起

      playRecorder();

  break;

return true;

 }});

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