Android简单的利用MediaRecorder进行录音的实例代码

package com.example.soundrecord_demo;

import java.io.IOException;

import android.media.MediaRecorder;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener{

private Button btn1, btn2;
private MediaRecorder record;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

btn1 = (Button) findViewById(R.id.button1);
btn2 = (Button) findViewById(R.id.button2);

btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
}

@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;
}

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
switch(arg0.getId())
{
case R.id.button1:
initAudio();
break;
case R.id.button2:
record.stop();
record.reset();
record.release();
break;
default:
break;
}
}

@SuppressWarnings("deprecation")
private void initAudio()
{
record = new MediaRecorder();
record.setAudioSource(MediaRecorder.AudioSource.MIC);
// 设置MediaRecorder的音频源为麦克风
record.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
// 设置MediaRecorder录制的音频格式
record.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
// 设置MediaRecorder录制音频的编码为amr.
record.setOutputFile("/sdcard/richard.amr");
// 设置录制好的音频文件保存路径
try {
record.prepare();
record.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/button2"
android:layout_below="@+id/button2"
android:layout_marginTop="62dp"
android:text="@string/play" />

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="84dp"
android:text="@string/stop" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>

<string name="app_name">SoundRecord_demo</string>
<string name="action_settings">Settings</string>
<string name="play">play</string>
<string name="stop">stop</string>

</resources>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.soundrecord_demo"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.soundrecord_demo.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

<!-- 联网权限 -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- 往SDCard写入数据权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- 录音权限 -->
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<!-- 在SDCard中创建与删除文件权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

</manifest>