复制代码 代码如下:
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;
}
}
