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>