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="/apk/res/android" xmlns:tools="/tools"
android:id="@+id/activity_main" android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context=".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<Void, Integer, Void> {@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<Void, Integer, Void> {@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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