Android MediaRecorder兑现暂停断点录音功能_Android

Android MediaRecorder实现暂停断点录音功能
Android MediaRecorder实现暂停断点录音功能
最近研究了下MediaRecorder的录音功能，发现暂停之后，继续录音这个功能，网上参考的资料比较少，现在将自己的学习成果分享大家：
基本原理如下：MediaRecorder通过MIC录音，系统没有自带的pause功能，每次暂停录音，都会结束本次的录音。现在本人的设计思路是：MediaRecorder录音暂停时，保存这段所录下的音频A，继续录音后，再次暂停，保留录音音频B；以此类推直到最终的录音结束时，依次读取之前保存的A、B……的录音文件，并将其合并在一起。涉及的技术：文件的保存读取、音频的合并等
音频的合并：设置MediaRecorder的音频输出格式mMediaRecorder01.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
mMediaRecorder01 .setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);输出的是amr格式。amr的音频文件的文件头，相对来说是固定的6个字节的固定字符，A.amr文件和B.amr文件的合并，只需将B以字节流读取，去掉前6个字节，和A的字节流合并后保存，就实现了音频合并，不涉及复杂的音频编码问题。（MediaRecorder的音频输出格式比较多，有jpgg、MP3等之类的格式，合成的原理大同小异，只需要注意他们的音频文件头的格式就可以了。）
资源代码：
http://download.csdn.net/detail/wanli_smile/4410240
有图有真相：
public class EX07 extends Activity {	private ImageButton myButton1;	private ImageButton myButton2;	private ImageButton myButton3;	private ImageButton myButton4;	private Button myButton;	private ListView myListView1;	private String strTempFile = "YYT_";	private File myRecAudioFile;	/**录音保存路径**/	private File myRecAudioDir;	private File myPlayFile;	private MediaRecorder mMediaRecorder01;	private int mMinute;	private boolean xx=true;	/**存放音频文件列表**/	private ArrayList<String> recordFiles;	private ArrayAdapter<String> adapter;	private TextView myTextView1;	/**文件存在**/	private boolean sdcardExit;	/**是否停止录音**/	private boolean isStopRecord;	/**按钮背景图片的标志位**/	private boolean sigle = false;	private String length1 = null;		private  final String SUFFIX=".amr";			/**暂停按钮**/	Button buttonpause;			/**记录需要合成的几段amr语音文件**/	private ArrayList<String> list;			int second=0;		int minute=0;		/**计时器**/	Timer timer;			/**是否暂停标志位**/	private boolean isPause;		/**在暂停状态中**/	private boolean inThePause;		/** Called when the activity is first created. */	@Override	public void onCreate(Bundle savedInstanceState) {				super.onCreate(savedInstanceState);		setContentView(R.layout.main);				//暂停标志位 为false		isPause=false;		//暂停状态标志位		inThePause=false;				//初始化list		list=new ArrayList<String>();				//四个按钮		myButton1 = (ImageButton) findViewById(R.id.ImageButton01);		myButton2 = (ImageButton) findViewById(R.id.ImageButton02);		myButton3 = (ImageButton) findViewById(R.id.ImageButton03);		myButton4 = (ImageButton) findViewById(R.id.ImageButton04);		myButton = (Button) findViewById(R.id.myButton);		buttonpause=(Button)findViewById(R.id.mypuase);		myListView1 = (ListView) findViewById(R.id.ListView01);		myTextView1 = (TextView) findViewById(R.id.TextView01);		myButton2.setEnabled(false);		myButton3.setEnabled(false);		myButton4.setEnabled(false);				myPlayFile=null;		// 判断sd Card是否插入		sdcardExit = Environment.getExternalStorageState().equals(				android.os.Environment.MEDIA_MOUNTED);		// 取得sd card路径作为录音文件的位置		if (sdcardExit){			String pathStr = Environment.getExternalStorageDirectory().getPath()+"/YYT";			myRecAudioDir= new File(pathStr);			if(!myRecAudioDir.exists()){				myRecAudioDir.mkdirs();				Log.v("录音", "创建录音文件！" + myRecAudioDir.exists());			}//			Environment.getExternalStorageDirectory().getPath() + "/" + PREFIX + "/";		}		// 取得sd card 目录里的.arm文件		getRecordFiles();				adapter = new ArrayAdapter<String>(this,				android.R.layout.simple_list_item_1, recordFiles);		// 将ArrayAdater添加ListView对象中		myListView1.setAdapter(adapter);		// 录音			myButton1.setOnClickListener(new ImageButton.OnClickListener() {     			@Override			public void onClick(View v) {			second=0;			minute=0;							list.clear();//			Calendar c=Calendar.getInstance();//			int	mMinute1=c.get(Calendar.MINUTE);							sigle = true;				// TODO Auto-generated method stub				 start();				if (sigle = false) {					myButton1.setBackgroundResource(R.drawable.record_hover1);				} else {					myButton1.setBackgroundResource(R.drawable.record_dis1);					myButton2.setBackgroundResource(R.drawable.stop_hover2);					myButton3.setBackgroundResource(R.drawable.play_hover1);					myButton4.setBackgroundResource(R.drawable.delete_hover);				}									}		});		// 停止		myButton2.setOnClickListener(new ImageButton.OnClickListener() {			@Override			public void onClick(View v) {												xx=false;				sigle = true;				timer.cancel();				// TODO Auto-generated method stub												//这里写暂停处理的 文件！加上list里面 语音合成起来				if(isPause){										//在暂停状态按下结束键,处理list就可以了					if(inThePause){						getInputCollection(list, false);					}					//在正在录音时，处理list里面的和正在录音的语音					else{						list.add(myRecAudioFile.getPath());						recodeStop();						getInputCollection(list, true);					}										//还原标志位					isPause=false;					inThePause=false;					buttonpause.setText("暂停录音");																							//	adapter.add(myRecAudioFile.getName());									}																//若录音没有经过任何暂停				else{														if (myRecAudioFile != null) {					// 停止录音					mMediaRecorder01.stop();					mMediaRecorder01.release();					mMediaRecorder01 = null;					// 将录音频文件给Adapter					adapter.add(myRecAudioFile.getName());					DecimalFormat df = new DecimalFormat("#.000");					if (myRecAudioFile.length() <= 1024*1024) {						//length1 = (myRecAudioFile.length() / 1024.0)+"";											      length1=df.format(myRecAudioFile.length() / 1024.0)+"K";					} else {						//length1 = (myRecAudioFile.length() / 1024.0 / 1024)+"";						//DecimalFormat df = new DecimalFormat("#.000");					      length1=df.format(myRecAudioFile.length() / 1024.0 / 1024)+"M";					}						System.out.println(length1);				      				      myTextView1.setText("停  止" + myRecAudioFile.getName()							+ "文件大小为：" + length1);					myButton2.setEnabled(false);							}							}				if (sigle = false) {					myButton2.setBackgroundResource(R.drawable.stop_hover2);				} else {					myButton1.setBackgroundResource(R.drawable.record_hover1);					myButton2.setBackgroundResource(R.drawable.stop1);					myButton3.setBackgroundResource(R.drawable.play_hover1);					myButton4.setBackgroundResource(R.drawable.delete_hover);				}								//停止录音了				isStopRecord = true;			}		});		// 播放		myButton3.setOnClickListener(new ImageButton.OnClickListener() {			@Override			public void onClick(View v) {				sigle = true;				// TODO Auto-generated method stub				if (myPlayFile != null && myPlayFile.exists()) {					// 打开播放程序					openFile(myPlayFile);				} else {					Toast.makeText(EX07.this, "你选的是一个空文件", Toast.LENGTH_LONG)							.show();					Log.d("没有选择文件","没有选择文件");				}				if (sigle = false) {					myButton3.setBackgroundResource(R.drawable.play_hover1);				} else {					myButton1.setBackgroundResource(R.drawable.record_hover1);					myButton2.setBackgroundResource(R.drawable.stop_hover2);					myButton3.setBackgroundResource(R.drawable.play1);					myButton4.setBackgroundResource(R.drawable.delete_hover);				}			}		});		// 删除		myButton4.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				sigle = true;				// TODO Auto-generated method stub				if (myPlayFile != null) {					// 先将Adapter删除文件名					adapter.remove(myPlayFile.getName());					// 删除文件					if (myPlayFile.exists())						myPlayFile.delete();					myTextView1.setText("完成删除！");				}				if (sigle = false) {					myButton4.setBackgroundResource(R.drawable.delete_hover);				} else {					myButton1.setBackgroundResource(R.drawable.record_hover1);					myButton2.setBackgroundResource(R.drawable.stop_hover2);					myButton3.setBackgroundResource(R.drawable.play_hover1);					myButton4.setBackgroundResource(R.drawable.delete_dis);				}			}		});				/**		 * 暂停按钮,记录之前保存的语音文件		 */		buttonpause.setOnClickListener(new OnClickListener() {						@Override			public void onClick(View v) {				// TODO Auto-generated method stub							isPause=true;								//已经暂停过了，再次点击按钮 开始录音，录音状态在录音中			if(inThePause){				buttonpause.setText("暂停录音");				start();				inThePause=false;											}			//正在录音，点击暂停,现在录音状态为暂停			else{								//当前正在录音的文件名，全程				list.add(myRecAudioFile.getPath());				inThePause=true;				recodeStop();				//start();				buttonpause.setText("继续录音");								//计时停止				timer.cancel();			}			}		});						myListView1				.setOnItemClickListener(new AdapterView.OnItemClickListener() {					@Override					public void onItemClick(AdapterView<?> arg, View arg1,							int arg2, long arg3) {						// TODO Auto-generated method stub						// 当有单点击文件名时将删除按钮及播放按钮Enable						myButton3.setEnabled(true);						myButton4.setEnabled(true);						myPlayFile = new File(myRecAudioDir.getAbsolutePath()								+ File.separator								+ ((TextView) arg1).getText().toString());												DecimalFormat df = new DecimalFormat("#.000");						if (myPlayFile.length() <= 1024*1024) {							length1=df.format(myPlayFile.length() / 1024.0)+"K";						} else {							length1=df.format(myPlayFile.length() / 1024.0/1024)+"M";						}						myTextView1.setText("你选的是"								+ ((TextView) arg1).getText().toString()								+ "文件大小为：" + length1);						Toast.makeText(EX07.this,"你选的是" + (((TextView) arg1).getText())+ "文件大小为：" + length1,										Toast.LENGTH_LONG).show();					}				});		myButton.setOnClickListener(new Button.OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub				showSize show = new showSize();				String text = show.showsize();				Toast.makeText(EX07.this, text, Toast.LENGTH_LONG).show();			}		});	}		protected void recodeStop() {		if (mMediaRecorder01 != null && !isStopRecord) {			// 停止录音			mMediaRecorder01.stop();			mMediaRecorder01.release();			mMediaRecorder01 = null;		}				timer.cancel();	}		/**	 * activity的生命周期，stop时关闭录音资源	 */	@Override	protected void onStop() {		// TODO Auto-generated method stub		if (mMediaRecorder01 != null && !isStopRecord) {			// 停止录音			mMediaRecorder01.stop();			mMediaRecorder01.release();			mMediaRecorder01 = null;		}		super.onStop();	}	/**	 * 获取目录下的所有音频文件	 */	private void getRecordFiles() {		// TODO Auto-generated method stub		recordFiles = new ArrayList<String>();		if (sdcardExit) {			File files[] = myRecAudioDir.listFiles();			if (files != null) {				for (int i = 0; i < files.length; i++) {					if (files[i].getName().indexOf(".") >= 0) { // 只取.amr 文件						String fileS = files[i].getName().substring(								files[i].getName().indexOf("."));						if (fileS.toLowerCase().equals(".mp3")								|| fileS.toLowerCase().equals(".amr")								|| fileS.toLowerCase().equals(".mp4"))							recordFiles.add(files[i].getName());					}				}			}		}	}	// 打开录音播放程序	private void openFile(File f) {		Intent intent = new Intent();		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);		intent.setAction(android.content.Intent.ACTION_VIEW);		String type = getMIMEType(f);		intent.setDataAndType(Uri.fromFile(f), type);		startActivity(intent);//		Uri uri=Uri.fromFile(f);//		MediaPlayer mediaPlayer=MediaPlayer.create(this, uri);//		try {//			mediaPlayer.prepare();//		} catch (IllegalStateException e) {//			// TODO Auto-generated catch block//			e.printStackTrace();//		} catch (IOException e) {//			// TODO Auto-generated catch block//			e.printStackTrace();//		}//		mediaPlayer.start();	}	private String getMIMEType(File f) {		String end = f.getName().substring(f.getName().lastIndexOf(".") + 1,				f.getName().length()).toLowerCase();		String type = "";		if (end.equals("mp3") || end.equals("aac") || end.equals("amr")				|| end.equals("mpeg") || end.equals("mp4")) {			type = "audio";		} else if (end.equals("jpg") || end.equals("gif") || end.equals("png")				|| end.equals("jpeg")) {			type = "image";		} else {			type = "*";		}		type += "/";		return type;	}		private void start(){				 		 TimerTask timerTask=new TimerTask() {						@Override			public void run() {				// TODO Auto-generated method stub				second++;				if(second>=60){					second=0;					minute++;				}				handler.sendEmptyMessage(1);			}		};		 timer=new Timer();		 timer.schedule(timerTask, 1000,1000);				try {			if (!sdcardExit) {				Toast.makeText(EX07.this, "请插入SD card",						Toast.LENGTH_LONG).show();				return;			}			String	mMinute1=getTime();			Toast.makeText(EX07.this, "当前时间是:"+mMinute1,Toast.LENGTH_LONG).show();			// 创建音频文件//			myRecAudioFile = File.createTempFile(mMinute1, ".amr",//					myRecAudioDir);						myRecAudioFile=new File(myRecAudioDir,mMinute1+SUFFIX);			mMediaRecorder01 = new MediaRecorder();			// 设置录音为麦克风			mMediaRecorder01					.setAudioSource(MediaRecorder.AudioSource.MIC);			mMediaRecorder01					.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);			mMediaRecorder01					.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);						//录音文件保存这里			mMediaRecorder01.setOutputFile(myRecAudioFile					.getAbsolutePath());			mMediaRecorder01.prepare();			mMediaRecorder01.start();			//			mMediaRecorder01.getMaxAmplitude();//			mMediaRecorder01.getAudioSourceMax();			mMediaRecorder01.setOnInfoListener(new OnInfoListener() {								@Override				public void onInfo(MediaRecorder mr, int what, int extra) {					// TODO Auto-generated method stub					int a=mr.getMaxAmplitude();					Toast.makeText(EX07.this, a, 500).show();				}			});						myTextView1.setText("录音中......");			myButton2.setEnabled(true);			myButton3.setEnabled(false);			myButton4.setEnabled(false);			isStopRecord = false;		} catch (IOException e) {			e.printStackTrace();		}		}	private String getTime(){		SimpleDateFormat   formatter   =   new   SimpleDateFormat   ("yyyy年MM月dd日HH：mm：ss");      		Date  curDate=new  Date(System.currentTimeMillis());//获取当前时间      		String   time   =   formatter.format(curDate);  		System.out.println("当前时间");		return time;		}		Handler handler=new Handler(){		@Override		public void handleMessage(Message msg) {			// TODO Auto-generated method stub			super.handleMessage(msg);						myTextView1.setText("录音时间："+minute+":"+second);		}			};		/**	 *  @param isAddLastRecord 是否需要添加list之外的最新录音，一起合并	 *  @return 将合并的流用字符保存	 */	public  void getInputCollection(List list,boolean isAddLastRecord){						String	mMinute1=getTime();		Toast.makeText(EX07.this, "当前时间是:"+mMinute1,Toast.LENGTH_LONG).show();				// 创建音频文件,合并的文件放这里		File file1=new File(myRecAudioDir,mMinute1+SUFFIX);		FileOutputStream fileOutputStream = null;		 		if(!file1.exists()){			try {				file1.createNewFile();			} catch (IOException e) {				// TODO Auto-generated catch block				e.printStackTrace();			}		}		try {			fileOutputStream=new FileOutputStream(file1);		} catch (IOException e) {			// TODO Auto-generated catch block			e.printStackTrace();		}		//list里面为暂停录音 所产生的 几段录音文件的名字，中间几段文件的减去前面的6个字节头文件									for(int i=0;i<list.size();i++){			File file=new File((String) list.get(i));	    Log.d("list的长度", list.size()+"");			try {				FileInputStream fileInputStream=new FileInputStream(file);				byte  []myByte=new byte[fileInputStream.available()];				//文件长度				int length = myByte.length;						//头文件				if(i==0){						while(fileInputStream.read(myByte)!=-1){								fileOutputStream.write(myByte, 0,length);							}						}									//之后的文件，去掉头文件就可以了				else{					while(fileInputStream.read(myByte)!=-1){												fileOutputStream.write(myByte, 6, length-6);					}				}								fileOutputStream.flush();				fileInputStream.close();				System.out.println("合成文件长度："+file1.length());						} catch (Exception e) {				// TODO Auto-generated catch block				e.printStackTrace();			}												}		//结束后关闭流		try {			fileOutputStream.close();		} catch (IOException e) {			// TODO Auto-generated catch block			e.printStackTrace();		}					//加上当前正在录音的这一段//			if(isAddLastRecord){//				//				//				//刚刚录音的//				try {//					FileInputStream fileInputStream=new FileInputStream(myRecAudioFile);//					byte  []myByte=new byte[fileInputStream.available()];//					System.out.println(fileInputStream.available()+"");//					while(fileInputStream.read(myByte)!=-1){//						//outputStream.//						fileOutputStream.write(myByte, 6, (fileInputStream.available()-6));//					}//					//					fileOutputStream.flush();//					fileInputStream.close();//					fileOutputStream.close();//					System.out.println("合成文件长度："+file1.length());//				} catch (Exception e) {//					// TODO Auto-generated catch block//					e.printStackTrace();//				}//				//			}								//合成一个文件后，删除之前暂停录音所保存的零碎合成文件			deleteListRecord(isAddLastRecord);			//			adapter.add(file1.getName());		}		private void deleteListRecord(boolean isAddLastRecord){		for(int i=0;i<list.size();i++){			File file=new File((String) list.get(i));			if(file.exists()){				file.delete();			}		}		//正在暂停后，继续录音的这一段音频文件		if(isAddLastRecord){			myRecAudioFile.delete();		}	}}
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