這篇文章給大家介紹在Android開發(fā)中利用MediaRecorder實(shí)現(xiàn)一個(gè)錄音功能,內(nèi)容非常詳細(xì),感興趣的小伙伴們可以參考借鑒,希望對(duì)大家能有所幫助。
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代碼如下:
public class MediaRecorderActivity extends BaseActivity { private Button start_tv; private ListView listView; //線程操作 private ExecutorService mExecutorService; //錄音API private MediaRecorder mMediaRecorder; //錄音開始時(shí)間與結(jié)束時(shí)間 private long startTime, endTime; //錄音所保存的文件 private File mAudioFile; //文件列表數(shù)據(jù) private List<FileBean> dataList; //錄音文件數(shù)據(jù)列表適配器 private AudioAdapter mAudioAdapter; //錄音文件保存位置 private String mFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/audio/"; //當(dāng)前是否正在播放 private volatile boolean isPlaying; //播放音頻文件API private MediaPlayer mediaPlayer; //使用Handler更新UI線程 private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case Constant.RECORD_SUCCESS: //錄音成功,展示數(shù)據(jù) if (null == mAudioAdapter) { mAudioAdapter = new AudioAdapter(MediaRecorderActivity.this, dataList, R.layout.file_item_layout); } listView.setAdapter(mAudioAdapter); break; //錄音失敗 case Constant.RECORD_FAIL: showToastMsg(getString(R.string.record_fail)); break; //錄音時(shí)間太短 case Constant.RECORD_TOO_SHORT: showToastMsg(getString(R.string.time_too_short)); break; case Constant.PLAY_COMPLETION: showToastMsg(getString(R.string.play_over)); break; case Constant.PLAY_ERROR: showToastMsg(getString(R.string.play_error)); break; } } }; @Override protected void setWindowView() { setContentView(R.layout.activity_record); //錄音及播放要使用單線程操作 mExecutorService = Executors.newSingleThreadExecutor(); dataList = new ArrayList<>(); } @Override protected void initViews() { this.start_tv = (Button) findViewById(R.id.start_tv); this.listView = (ListView) findViewById(R.id.listview); } @Override protected void initEvents() { //類似微信等應(yīng)用按住說話進(jìn)行錄音,所以用OnTouch事件 this.start_tv.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { switch (motionEvent.getAction()) { //按下操作 case MotionEvent.ACTION_DOWN: //安卓6.0以上錄音相應(yīng)權(quán)限處理 if (Build.VERSION.SDK_INT > 22) { permissionForM(); } else { startRecord(); } break; //松開操作 case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: stopRecord(); break; } //對(duì)OnTouch事件做了處理,返回true return true; } }); //點(diǎn)擊播放對(duì)應(yīng)的錄音文件 this.listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { //使用MediaPlayer播放聲音文件 startPlay(dataList.get(i).getFile()); } }); } /** * @description 開始進(jìn)行錄音 * @author ldm * @time 2017/2/9 9:18 */ private void startRecord() { start_tv.setText(R.string.stop_by_up); start_tv.setBackgroundResource(R.drawable.bg_gray_round); //異步任務(wù)執(zhí)行錄音操作 mExecutorService.submit(new Runnable() { @Override public void run() { //播放前釋放資源 releaseRecorder(); //執(zhí)行錄音操作 recordOperation(); } }); } /** * @description 錄音失敗處理 * @author ldm * @time 2017/2/9 9:35 */ private void recordFail() { mAudioFile = null; mHandler.sendEmptyMessage(Constant.RECORD_FAIL); } /** * @description 錄音操作 * @author ldm * @time 2017/2/9 9:34 */ private void recordOperation() { //創(chuàng)建MediaRecorder對(duì)象 mMediaRecorder = new MediaRecorder(); //創(chuàng)建錄音文件,.m4a為MPEG-4音頻標(biāo)準(zhǔn)的文件的擴(kuò)展名 mAudioFile = new File(mFilePath + System.currentTimeMillis() + ".m4a"); //創(chuàng)建父文件夾 mAudioFile.getParentFile().mkdirs(); try { //創(chuàng)建文件 mAudioFile.createNewFile(); //配置mMediaRecorder相應(yīng)參數(shù) //從麥克風(fēng)采集聲音數(shù)據(jù) mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); //設(shè)置保存文件格式為MP4 mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); //設(shè)置采樣頻率,44100是所有安卓設(shè)備都支持的頻率,頻率越高,音質(zhì)越好,當(dāng)然文件越大 mMediaRecorder.setAudioSamplingRate(44100); //設(shè)置聲音數(shù)據(jù)編碼格式,音頻通用格式是AAC mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC); //設(shè)置編碼頻率 mMediaRecorder.setAudioEncodingBitRate(96000); //設(shè)置錄音保存的文件 mMediaRecorder.setOutputFile(mAudioFile.getAbsolutePath()); //開始錄音 mMediaRecorder.prepare(); mMediaRecorder.start(); //記錄開始錄音時(shí)間 startTime = System.currentTimeMillis(); } catch (Exception e) { e.printStackTrace(); recordFail(); } } /** * @description 結(jié)束錄音操作 * @author ldm * @time 2017/2/9 9:18 */ private void stopRecord() { start_tv.setText(R.string.speak_by_press); start_tv.setBackgroundResource(R.drawable.bg_white_round); //停止錄音 mMediaRecorder.stop(); //記錄停止時(shí)間 endTime = System.currentTimeMillis(); //錄音時(shí)間處理,比如只有大于2秒的錄音才算成功 int time = (int) ((endTime - startTime) / 1000); if (time >= 3) { //錄音成功,添加數(shù)據(jù) FileBean bean = new FileBean(); bean.setFile(mAudioFile); bean.setFileLength(time); dataList.add(bean); //錄音成功,發(fā)Message mHandler.sendEmptyMessage(Constant.RECORD_SUCCESS); } else { mAudioFile = null; mHandler.sendEmptyMessage(Constant.RECORD_TOO_SHORT); } //錄音完成釋放資源 releaseRecorder(); } /** * @description 翻放錄音相關(guān)資源 * @author ldm * @time 2017/2/9 9:33 */ private void releaseRecorder() { if (null != mMediaRecorder) { mMediaRecorder.release(); mMediaRecorder = null; } } @Override public void onClick(View view) { } @Override protected void onDestroy() { super.onDestroy(); //頁(yè)面銷毀,線程要關(guān)閉 mExecutorService.shutdownNow(); } /*******6.0以上版本手機(jī)權(quán)限處理***************************/ /** * @description 兼容手機(jī)6.0權(quán)限管理 * @author ldm * @time 2016/5/24 14:59 */ private void permissionForM() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO, Manifest.permission.WRITE_EXTERNAL_STORAGE}, Constant.PERMISSIONS_REQUEST_FOR_AUDIO); } else { startRecord(); } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { if (requestCode == Constant.PERMISSIONS_REQUEST_FOR_AUDIO) { if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { startRecord(); } return; } super.onRequestPermissionsResult(requestCode, permissions, grantResults); } /** * @description 播放音頻 * @author ldm * @time 2017/2/9 16:54 */ private void playAudio(final File mFile) { if (null != mFile && !isPlaying) { isPlaying = true; mExecutorService.submit(new Runnable() { @Override public void run() { startPlay(mFile); } }); } } /** * @description 開始播放音頻文件 * @author ldm * @time 2017/2/9 16:56 */ private void startPlay(File mFile) { try { //初始化播放器 mediaPlayer = new MediaPlayer(); //設(shè)置播放音頻數(shù)據(jù)文件 mediaPlayer.setDataSource(mFile.getAbsolutePath()); //設(shè)置播放監(jiān)聽事件 mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mediaPlayer) { //播放完成 playEndOrFail(true); } }); //播放發(fā)生錯(cuò)誤監(jiān)聽事件 mediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() { @Override public boolean onError(MediaPlayer mediaPlayer, int i, int i1) { playEndOrFail(false); return true; } }); //播放器音量配置 mediaPlayer.setVolume(1, 1); //是否循環(huán)播放 mediaPlayer.setLooping(false); //準(zhǔn)備及播放 mediaPlayer.prepare(); mediaPlayer.start(); } catch (IOException e) { e.printStackTrace(); //播放失敗正理 playEndOrFail(false); } } /** * @description 停止播放或播放失敗處理 * @author ldm * @time 2017/2/9 16:58 */ private void playEndOrFail(boolean isEnd) { isPlaying = false; if (isEnd) { mHandler.sendEmptyMessage(Constant.PLAY_COMPLETION); } else { mHandler.sendEmptyMessage(Constant.PLAY_ERROR); } if (null != mediaPlayer) { mediaPlayer.setOnCompletionListener(null); mediaPlayer.setOnErrorListener(null); mediaPlayer.stop(); mediaPlayer.reset(); mediaPlayer.release(); mediaPlayer = null; } } }
頁(yè)面布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin"> <Button android:id="@+id/start_tv" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="開始錄音" android:textSize="16sp" /> <ListView android:id="@+id/listview" android:layout_width="match_parent" android:layout_height="wrap_content" android:divider="#d1d1d1" android:dividerHeight="1dp" android:scrollbars="none" android:layout_marginTop="10dp" android:layout_marginBottom="10dp"></ListView> </LinearLayout>
對(duì)應(yīng)資源文件strings.xml:
<resources> <string name="app_name">mediarecorder</string> <string name="record_fail">錄音失敗</string> <string name="time_too_short">時(shí)間太短,請(qǐng)重新錄音</string> <string name="play_over">播放完成</string> <string name="play_error">抱歉,播放發(fā)生異常</string> <string name="stop_by_up">松開停止錄音</string> <string name="speak_by_press">按住說話</string> <string name="start_record">開始錄音</string> <string name="stop_record">停止錄音</string> </resources>
錄音相關(guān)權(quán)限 :
<!--SD卡權(quán)限--> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <!--錄音權(quán)限--> <uses-permission android:name="android.permission.RECORD_AUDIO"/>
關(guān)于在Android開發(fā)中利用MediaRecorder實(shí)現(xiàn)一個(gè)錄音功能就分享到這里了,希望以上內(nèi)容可以對(duì)大家有一定的幫助,可以學(xué)到更多知識(shí)。如果覺得文章不錯(cuò),可以把它分享出去讓更多的人看到。
文章題目:在Android開發(fā)中利用MediaRecorder實(shí)現(xiàn)一個(gè)錄音功能
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