【实例简介】

该PCM 参数如下：

rm-channels_2

frame_4096(纯PCM数据每帧长度4096)

freq_44100

bits_16

480X234_1700kbps.rm是源音频文件

【实例截图】

【核心代码】

package com.genius.demo;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import com.genius.demo.R.id;

import android.app.Activity;

import android.media.AudioFormat;

import android.os.Bundle;

import android.os.Environment;

import android.os.Handler;

import android.os.Message;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class AudioPlayerDemoActivity extends Activity implements OnClickListener{

/** Called when the activity is first created. */

private TextView mTextViewState;// 播放状态

private Button mBtnPlayButton;// 播放

private Button mBtnPauseButton;// 暂停

private Button mBtnStopButton;// 停止

private AudioPlayer mAudioPlayer;// 播放器

private Handler mHandler;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

initView();

initLogic();

}

@Override

protected void onDestroy() {

// TODO Auto-generated method stub

super.onDestroy();

mAudioPlayer.release();

}

public void initView()

{

mTextViewState = (TextView) findViewById(R.id.tvPlayState);

mBtnPlayButton = (Button) findViewById(R.id.buttonPlay);

mBtnPlayButton.setOnClickListener(this);

mBtnPauseButton = (Button) findViewById(R.id.buttonPause);

mBtnPauseButton.setOnClickListener(this);

mBtnStopButton = (Button) findViewById(R.id.buttonStop);

mBtnStopButton.setOnClickListener(this);

}

public void initLogic()

{

mHandler = new Handler()

{

@Override

public void handleMessage(Message msg) {

// TODO Auto-generated method stub

switch(msg.what)

{

case AudioPlayer.STATE_MSG_ID:

showState((Integer)msg.obj);

break;

}

}

};

mAudioPlayer = new AudioPlayer(mHandler);

// 获取音频参数

AudioParam audioParam = getAudioParam();

mAudioPlayer.setAudioParam(audioParam);

// 获取音频数据

byte[] data = getPCMData();

mAudioPlayer.setDataSource(data);

// 音频源就绪

mAudioPlayer.prepare();

if (data == null)

{

mTextViewState.setText(filePath "：该路径下不存在文件！");

}

}

@Override

public void onClick(View view) {

// TODO Auto-generated method stub

switch(view.getId())

{

case R.id.buttonPlay:

play();

break;

case R.id.buttonPause:

pause();

break;

case R.id.buttonStop:

stop();

break;

}

}

public void play()

{

mAudioPlayer.play();

}

public void pause()

{

mAudioPlayer.pause();

}

public void stop()

{

mAudioPlayer.stop();

}

public void showState(int state)

{

String showString = "";

switch(state)

{

case PlayState.MPS_UNINIT:

showString = "MPS_UNINIT";

break;

case PlayState.MPS_PREPARE:

showString = "MPS_PREPARE";

break;

case PlayState.MPS_PLAYING:

showString = "MPS_PLAYING";

break;

case PlayState.MPS_PAUSE:

showString = "MPS_PAUSE";

break;

}

showState(showString);

}

public void showState(String str)

{

mTextViewState.setText(str);

}

/*

* 获得PCM音频数据参数

*/

public AudioParam getAudioParam()

{

AudioParam audioParam = new AudioParam();

audioParam.mFrequency = 44100;

audioParam.mChannel = AudioFormat.CHANNEL_CONFIGURATION_STEREO;

audioParam.mSampBit = AudioFormat.ENCODING_PCM_16BIT;

return audioParam;

}

String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() "/testmusic.pcm";

/*

* 获得PCM音频数据

*/

public byte[] getPCMData()

{

File file = new File(filePath);

if (file == null){

return null;

}

FileInputStream inStream;

try {

inStream = new FileInputStream(file);

} catch (FileNotFoundException e) {

e.printStackTrace();

return null;

}

byte[] data_pack = null;

if (inStream != null){

long size = file.length();

data_pack = new byte[(int) size];

try {

inStream.read(data_pack);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

return null;

}

}

return data_pack;

}

}