在我的项目中，我使用 mediaplayer 录制了声音并保存为 .3gp 文件，但是当我想使用一些音频效果或快进播放它或在播放时更改音频的音高时。我使用了 mediaplayer 但无法正常工作。然后我使用了音轨，但音轨仅将字节流作为输入来播放。我只想播放 .3gp 文件并在播放时更改音高.. 我在下面使用这个。帮助我...提前谢谢...
public void play() {
File path = new File(
Environment.getExternalStorageDirectory().getAbsolutePath()
+ "/sdcard/meditest/");
File[] f=path.listFiles();
isPlaying=true;
int bufferSize = AudioTrack.getMinBufferSize(outfrequency,
channelConfigurationout, audioEncoding);
short[] audiodata = new short[bufferSize];
try {
DataInputStream dis = new DataInputStream(
new BufferedInputStream(new FileInputStream(
f[0])));
audioTrack = new AudioTrack(
AudioManager.STREAM_MUSIC, outfrequency,
channelConfigurationout, audioEncoding, bufferSize,
AudioTrack.MODE_STREAM);
audioTrack.setPlaybackRate((int) (frequency*1.5));
AudioManager audioManager = (AudioManager)this.getSystemService(Context.AUDIO_SERVICE);
// Set the volume of played media to maximum.
audioTrack.setStereoVolume(1.0f,1.0f);
Log.d("Clapper","player start");
audioTrack.play();
while (isPlaying && dis.available() > 0) {
int i = 0;
while (dis.available() > 0 && i < audiodata.length) {
audiodata[i] = dis.readShort();
i++;
if(i/50==0)
Log.d("Clapper", "playing now"+i);
}
audioTrack.write(audiodata, 0, audiodata.length);
}
Log.d("Clapper","AUDIO LENGTH: "+String.valueOf(audiodata));
dis.close();
audioTrack.stop();
} catch (Throwable t) {
Log.e("AudioTrack", "Playback Failed");
}
Log.d("Clapper","AUDIO state: "+String.valueOf(audioTrack.getPlayState()));
talkAnimation.stop();
if(audioTrack.getPlayState()!=AudioTrack.PLAYSTATE_PLAYING)
{
runOnUiThread(new Runnable() {
public void run() {
// TODO Auto-generated method stub
imgtalk.setBackgroundResource(R.drawable.talk1);
}
});
}
}