类似微信说话功能的录音处理代码分享

package com.example.testaudio;

import java.io.file;

import android.app.activity;
import android.media.mediaplayer;
import android.media.mediaplayer.oncompletionlistener;
import android.media.mediarecorder;
import android.os.bundle;
import android.os.environment;
import android.os.handler;
import android.os.message;
import android.util.log;
import android.view.menu;
import android.view.motionevent;
import android.view.view;
import android.view.view.onclicklistener;
import android.view.view.ontouchlistener;
import android.widget.button;
import android.widget.textview;

public class mainactivity extends activity {

 private mediarecorder recoder = null;
 private mediaplayer player = null;
 private string themediapath;

 textview tv = null;
 textview tvrecord = null;
 button testbtn = null;
 button testbtn2 = null;
 button stopbtn = null;
 button playbtn = null;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  tv = (textview)findviewbyid(r.id.textview1);
  tvrecord = (textview)findviewbyid(r.id.tvrecord);
  testbtn = (button)findviewbyid(r.id.button1);
  testbtn2 = (button)findviewbyid(r.id.button2);
  stopbtn = (button)findviewbyid(r.id.buttonstop);
  playbtn = (button)findviewbyid(r.id.buttonplay);

  testbtn2.setontouchlistener(new ontouchlistener() {
   @override
   public boolean ontouch(view v, motionevent event) {
    log.i("testactivity", "setontouchlistener:"+event.getaction());
    switch(event.getaction()) {
     case motionevent.action_up: {
      log.i("testactivity", "停止录音");
      stoprecording();
      break;
     }
     case motionevent.action_down: {
      log.i("testactivity", "开始录音");
      startrecording();
      break;
     }
     default: break;
    }
    return false;
   }
  });

  
  testbtn.setonclicklistener(new onclicklistener() {
   public void onclick(view arg0) {
    startrecording();
    testbtn.setenabled(false);
    stopbtn.setenabled(true);
   }
  });

  stopbtn.setenabled(false);

  stopbtn.setonclicklistener(new onclicklistener() {
   public void onclick(view arg0) {
    stoprecording();
    testbtn.setenabled(true);
    playbtn.setenabled(true);
    stopbtn.setenabled(false);
   }
  });

  
  playbtn.setonclicklistener(new onclicklistener() {
   public void onclick(view arg0) {
    playrecordfile(themediapath);
    stopbtn.setenabled(true);
   }
  });
 }

 protected void playrecordfile(string _file) {
  try {
   file f = new file(_file);
   if(!f.exists()) {
    tv.settext("文件不存在:" + _file);
    return;
   }
  } catch(exception e) {
   log.i("testactivity", e.getmessage());
  }
  try {
   player = new mediaplayer();
   player.setdatasource(_file);
   player.prepare();
   player.setoncompletionlistener(new oncompletionlistener() {
    public void oncompletion(mediaplayer arg0) {
     tv.settext("播放完毕");
     stopbtn.setenabled(false);
    }
   });

   player.start();
  } catch(exception e) {
   log.e("testactivity", "play failed:" + e.getmessage());
  }
 }

 /**
  * 停止录音处理
  */
 protected void stoprecording() {

  if(recoder != null) {
   log.i("testactivity", "停止录音");
   recoder.stop();
   recoder.release();
   recoder = null;
   endtime = system.currenttimemillis();
   _handlerecordcomplete();
  }
  if(player != null) {
   log.i("testactivity", "停止播放");
   player.stop();
   player.release();
   player = null;
  }
 }

 
 /**
  * 开始录音处理
  */
 protected void startrecording() {

  themediapath = environment.getexternalstoragedirectory().getabsolutepath();
  themediapath += "/audiotest.3gp";

  recoder = new mediarecorder();
  recoder.setaudiosource(mediarecorder.audiosource.mic);
  recoder.setoutputformat(mediarecorder.outputformat.three_gpp);
  recoder.setoutputfile(themediapath);
  recoder.setaudioencoder(mediarecorder.audioencoder.amr_nb);

  starttime = system.currenttimemillis();
  updatemicstatus();

  try {
   recoder.prepare();
   recoder.start();
   _handlerecordstart();
  } catch (exception e) {
   log.e("testactivity", "prepared failed:" + e.getmessage());
   _handlerecordstarterror(e);
  }

 }

 //定时器
 private static long maxtime = 30*1000; //30秒
 private long starttime = 0l;
 private long endtime = 0l;
 private final handler mhandler = new handler(); 
    private runnable mupdatemicstatustimer = new runnable() { 
        public void run() { 
         //判断是否超时
         if(starttime > 0 && system.currenttimemillis() - starttime > maxtime) {
          log.e("testactivity", "超时的录音时间，直接停止");
          stoprecording();
          return;
         }

         //更新分贝状态
            updatemicstatus(); 
        } 
    }; 

    /**
     * 更新话筒状态 分贝是也就是相对响度 分贝的计算公式k=20lg(vo/vi) vo当前振幅值 vi基准值为600：我是怎么制定基准值的呢？ 当20
     * * math.log10(mmediarecorder.getmaxamplitude() / vi)==0的时候vi就是我所需要的基准值
     * 当我不对着麦克风说任何话的时候，测试获得的mmediarecorder.getmaxamplitude()值即为基准值。
     * log.i("mic_", "麦克风的基准值：" + mmediarecorder.getmaxamplitude());前提时不对麦克风说任何话
     */ 
    private int base = 600; 
    private int space = 300;// 间隔取样时间

    private void updatemicstatus() { 
        if (recoder != null) { 
            // int vusize = 10 * mmediarecorder.getmaxamplitude() / 32768; 
            int ratio = recoder.getmaxamplitude() / base; 
            int db = 0;// 分贝 
            if (ratio > 1) 
                db = (int) (20 * math.log10(ratio)); 

           
            _handlerecordvoice(db);

            mhandler.postdelayed(mupdatemicstatustimer, space); 
            /*
             * if (db > 1) { vusize = (int) (20 * math.log10(db)); log.i("mic_",
             * "麦克风的音量的大小：" + vusize); } else log.i("mic_", "麦克风的音量的大小：" + 0);
             */ 
        } 
    }
 

 private void _handlerecordstart() {
  //开始录音的接收函数
  tv.settext("开始录音...");
  //starttime 开始时间
 }

 private void _handlerecordstarterror(exception e) {
  //开始录音的接收函数失败
  tv.settext("开始录音失败:" + e.getmessage());
 }

 private void _handlerecordcomplete() {
  //结束录音
  tv.settext("停止录音:" + themediapath);
 }

 private void _handlerecordvoice(int _db) {
  //声音事件侦听，转换成分贝
  tvrecord.settext(""+_db);
 }

 @override
 public boolean oncreateoptionsmenu(menu menu) {
  // inflate the menu; this adds items to the action bar if it is present.
  getmenuinflater().inflate(r.menu.main, menu);
  return true;
 }

}