Android音頻操作：錄音和播放

此demo演示了在android上錄音和播放的操作，主要使用：MediaPlayer，MediaRecorder 工具類。

demo地址：http://download.csdn.net/detail/youmingyu/9740791

MainActivity：

package fk.androiddemo_034;

import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import java.io.IOException;

public class MainActivity extends Activity {
    private static final String LOG_TAG = "AudioRecordTest";
    //語音文件
    private String FileName = null;

    //界面控件
    private Button startRecord;
    private Button startPlay;
    private Button stopRecord;
    private Button stopPlay;

    //語音操作對象
    private MediaPlayer mPlayer = null;
    private MediaRecorder mRecorder = null;

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

        //開始錄音
        startRecord = (Button)findViewById(R.id.startRecord);
        startRecord.setOnClickListener(new startRecordListener());

        //結束錄音
        stopRecord = (Button)findViewById(R.id.stopRecord);
        stopRecord.setOnClickListener(new stopRecordListener());

        //開始播放
        startPlay = (Button)findViewById(R.id.startPlay);
        startPlay.setOnClickListener(new startPlayListener());

        //結束播放
        stopPlay = (Button)findViewById(R.id.stopPlay);
        stopPlay.setOnClickListener(new stopPlayListener());

        //設置sdcard的路徑
        FileName = Environment.getExternalStorageDirectory().getAbsolutePath();
        FileName += "/FK_AudioTest.3gp";//會存放到手機外部存儲最外層目錄
    }

    //開始錄音
    class startRecordListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mRecorder = new MediaRecorder();
            mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
            mRecorder.setOutputFile(FileName);
            mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
            try {
                mRecorder.prepare();
            } catch (IOException e) {
                Log.e(LOG_TAG, "prepare() failed");
            }
            mRecorder.start();
        }

    }

    //停止錄音
    class stopRecordListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mRecorder.stop();
            mRecorder.release();
            mRecorder = null;
        }

    }

    //播放錄音
    class startPlayListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mPlayer = new MediaPlayer();
            try{
                mPlayer.setDataSource(FileName);
                mPlayer.prepare();
                mPlayer.start();
            }catch(IOException e){
                Log.e(LOG_TAG,"播放失敗");
            }
        }

    }

    //停止播放錄音
    class stopPlayListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            mPlayer.release();
            mPlayer = null;
        }
    }
}

聲明權限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />