今天自己利用课余时间做了一个关于语音记录器的初步设计。主要实现的功能如下(录音、播放、发送音频):
(这是一个在客户端中使用的部分关键代码。MediaPlayer、MediaRecorder)
录音:
录音这里我使用到了MediaRecorder,这是一个语音保存的类,主要实现过程如下。
btRecord = (Button)findViewById(R.id.bt_record); btRecord.setOnTouchListener(new Record()); class Record implements OnTouchListener{ @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: btRecord.setText(R.string.end_record); Toast.makeText(MainActivity.this, "开始录音", Toast.LENGTH_SHORT).show(); mediaRecorder = new MediaRecorder(); mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); mediaRecorder.setOutputFile(sFilePath); mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); try { mediaRecorder.prepare(); } catch (IOException e) { Log.e("Test : ", "prepare() failed"); } mediaRecorder.start(); break; case MotionEvent.ACTION_UP: btRecord.setText(R.string.start_record); Toast.makeText(MainActivity.this, "结束录音"+sFilePath, Toast.LENGTH_SHORT).show(); file = new File(sFilePathInit, sFileName); mediaRecorder.stop(); mediaRecorder.release(); mediaRecorder = null; break; case MotionEvent.ACTION_CANCEL: break; default: break; } return true; } }
播放:
播放这里我使用到了MediaPlayer,这是一个语音播放的类,主要实现的过程如下。
btPlayer = (Button)findViewById(R.id.bt_play); btPlayer.setOnTouchListener(new Player()); class Player implements OnTouchListener, OnCompletionListener{ @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: btPlayer.setText(R.string.end_play); Toast.makeText(MainActivity.this, "开始播放", Toast.LENGTH_SHORT).show(); mediaPlayer = new MediaPlayer(); try{ mediaPlayer.setDataSource(sFilePath); mediaPlayer.prepare(); mediaPlayer.start(); mediaPlayer.setOnCompletionListener(new Player()); }catch(IOException e){ Log.e("Test : ","播放失败"); } break; case MotionEvent.ACTION_UP: break; case MotionEvent.ACTION_CANCEL: break; default: break; } return true; } //监听音频播放结束 @Override public void onCompletion(MediaPlayer arg0) { btPlayer.setText(R.string.start_play); Toast.makeText(MainActivity.this, "结束播放", Toast.LENGTH_SHORT).show(); mediaPlayer.release(); mediaPlayer = null; } }
发送:
这里用到了服务器的连接,和音频的传输方面,具体的看代码就了解了。
public void uploadRecord(String filePath){ String result = null; String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成 String PREFIX = "--" , LINE_END = "rn"; String CONTENT_TYPE = "multipart/form-data"; //内容类型 try { URL url = new URL(URLDownload); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setReadTimeout(TIME_OUT); conn.setConnectTimeout(TIME_OUT); conn.setDoInput(true); //允许输入流 conn.setDoOutput(true); //允许输出流 conn.setUseCaches(false); //不允许使用缓存 conn.setRequestMethod("POST"); //请求方式 conn.setRequestProperty("Charset", CHARSET); //设置编码 conn.setRequestProperty("connection", "keep-alive"); conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY); //conn.connect(); if(file != null){ /** * 当文件不为空,把文件包装并且上传 */ DataOutputStream dos = new DataOutputStream( conn.getOutputStream()); StringBuffer sb = new StringBuffer(); sb.append(PREFIX); sb.append(BOUNDARY); sb.append(LINE_END); /** * 这里重点注意: * name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件 * filename是文件的名字,包含后缀名的 比如:abc.png */ sb.append("Content-Disposition: form-data; name="sound"; filename=""+file.getName()+"""+LINE_END); sb.append("Content-Type: application/octet-stream; charset="+CHARSET+LINE_END); sb.append(LINE_END); dos.write(sb.toString().getBytes()); InputStream is = new FileInputStream(sFilePath); byte[] bytes = new byte[1024]; int len = 0; while((len=is.read(bytes))!=-1) { dos.write(bytes, 0, len); } is.close(); dos.write(LINE_END.getBytes()); byte[] end_data = (PREFIX+BOUNDARY+PREFIX+LINE_END).getBytes(); dos.write(end_data); dos.flush(); /** * 获取响应码 200=成功 * 当响应成功,获取响应的流 */ int res = conn.getResponseCode(); Log.e(TAG, "response code:"+res); if(res==200) { Log.e(TAG, "request success"); InputStream input = conn.getInputStream(); StringBuffer sb1= new StringBuffer(); int ss ; while((ss=input.read())!=-1) { sb1.append((char)ss); } result = sb1.toString(); Log.e(TAG, "result : "+ result); //Toast.makeText(MainActivity.this, "上传成功!", Toast.LENGTH_LONG).show(); } else{ Log.e(TAG, "request error"); //Toast.makeText(MainActivity.this, "上传失败!", Toast.LENGTH_LONG).show(); } //showDialog(result); dos.close(); conn.disconnect(); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public void showDialog(String mess){ new AlertDialog.Builder(MainActivity.this).setTitle("Message").setMessage(mess).setNegativeButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { // TODO Auto-generated method stub } }).show(); }
今天就写到这里,后面有时间了继续修改这篇博文。
sFilePath = Environment.getExternalStorageDirectory().getAbsolutePath(); //获取手机SD卡的路径。
需要添加的权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
晚安v_v
PS : 请尊重博主的劳动,如果需要转载,请注明出处。