Android 使用mp3格式录音

这个Demo是用前文的Lame库写的，分两步走，第一步使用raw格式录音，第二步转换。部分代码抄自三星的demo. android lame库:Android开发 使用Lame把音频文件转换成mp3格式

package com.pocketdigi.recordermp3;

import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

import com.pocketdigi.utils.FLameUtils;

public class MainActivity extends Activity {
    
    Button record,raw2mp3;
    boolean isRecording=false;
    private short[] mBuffer;
    AudioRecord mRecorder;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        record=(Button)findViewById(R.id.record);
        raw2mp3=(Button)findViewById(R.id.raw2mp3);
        initRecorder();
        final String tempFile=Environment.getExternalStorageDirectory()+"/aa.raw";
        final String mp3File=Environment.getExternalStorageDirectory()+"/bb.mp3";
        record.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(isRecording)
                {
                    record.setText("录音");
                    isRecording=false;
                    mRecorder.stop();
                }else{
                    record.setText("停止");
                    isRecording=true;
                    mRecorder.startRecording();
                    startBufferedWrite(new File(tempFile));
                }
            }
        });
        raw2mp3.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(isRecording)
                {
                    return;
                }
                File file=new File(tempFile);
                if(!file.exists())
                {
                    return;
                }
                new Thread()
                {
                    public void run()
                    {
                        FLameUtils lameUtils=new FLameUtils(1, 16000, 96);
                        System.out.println(lameUtils.raw2mp3(tempFile, mp3File));
                    }
                }.start();
                
            }
        });

    }
    /**
     * 初始化Recorder
     */
    public void initRecorder()
    {
        int bufferSize = AudioRecord.getMinBufferSize(16000, AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT);
        mBuffer = new short[bufferSize];
        mRecorder = new AudioRecord(MediaRecorder.AudioSource.MIC, 16000, AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT, bufferSize);
    }
    /**
     * 写入到文件
     * @param file
     */
    private void startBufferedWrite(final File file) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                DataOutputStream output = null;
                try {
                    output = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
                    while (isRecording) {
                        int readSize = mRecorder.read(mBuffer, 0, mBuffer.length);
                        for (int i = 0; i < readSize; i++) {
                            output.writeShort(mBuffer[i]);
                        }
                    }
                } catch (IOException e) {
                    Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();
                } finally {
                    if (output != null) {
                        try {
                            output.flush();
                        } catch (IOException e) {
                            Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();
                        } finally {
                            try {
                                output.close();
                            } catch (IOException e) {
                                Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();
                            }
                        }
                    }
                }
            }
        }).start();
    }
    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        mRecorder.release();
    }

}