audiotrack使用的一个例子

package sam.you;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;
import com.leshi.common.SDcardUtil;


import android.R.integer;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.app.ProgressDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.content.pm.ActivityInfo;
import android.content.res.AssetManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Bitmap.Config;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.hardware.Camera.Size;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.media.ThumbnailUtils;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.provider.ContactsContract;
import android.provider.MediaStore.Video.Thumbnails;
import android.telephony.TelephonyManager;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.style.ForegroundColorSpan;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.View.OnKeyListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidTest extends Activity implements View.OnClickListener,SurfaceHolder.Callback
{
private SurfaceHolder surfaceHolder = null;
private SurfaceView surfaceView = null;
private AudioTrack audioTrack = null;
private Thread writePCMThread = null;
private File audioFile = null;
private FileInputStream fileInputStream = null;
private byte buffer[] = new byte[16*10000];

// The Handler that gets information back from the other threads
private final Handler msgHandler = new Handler()
{
public void handleMessage(Message msg)
{

switch (msg.what)
{


default:
break;


}
}
};




/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
surfaceView = (SurfaceView) findViewById(R.id.surface);
SurfaceHolder surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
findViewById(R.id.button1).setOnClickListener(this);
findViewById(R.id.button2).setOnClickListener(this);
}

public void finish() {
super.finish();
System.out.println("finish");
try {
writePCMThread.interrupt();

} catch (Exception e) {
}
try {
fileInputStream.close();
} catch (Exception e) {
}
try {
audioTrack.stop();
audioTrack.release();
} catch (Exception e) {
}
}



protected void onResume()
{
super.onResume();
System.out.println("back on!!!!!!!!!!!");
initAudioTrack();
audioFile = new File(Environment.getExternalStorageDirectory(),"test.wav");
System.out.println(audioFile.length());
try {
fileInputStream = new FileInputStream(audioFile);
fileInputStream.skip(0x2c);
} catch (Exception e) {
}

writePCMThread = new Thread(new Runnable(){
public void run() {
try
{
while(fileInputStream.read(buffer)>=0)
{
System.out.println("write pcm data");
audioTrack.write(buffer, 0, buffer.length);

}
}
catch (Exception e) {
e.printStackTrace();
}

}
});

}

private void initAudioTrack()
{
int minBufferSize = AudioTrack.getMinBufferSize(0xac44, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);
System.out.println("minBufferSize = "+minBufferSize);
audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 0xac44,
AudioFormat.CHANNEL_CONFIGURATION_STEREO, AudioFormat.ENCODING_PCM_16BIT, minBufferSize*2,AudioTrack.MODE_STREAM);
audioTrack.setStereoVolume(1.0f, 1.0f);// 设置当前音量大小
System.out.println("initAudioTrack over");
audioTrack.play();
}




public void onClick(View v)
{
switch (v.getId()) {
case R.id.button1:
writePCMThread.start();


break;
case R.id.button2:
break;
default:
break;
}


}




public void surfaceCreated(SurfaceHolder holder) {
System.out.println("surfaceCreated()");
this.surfaceHolder = holder;
}

public void surfaceDestroyed(SurfaceHolder holder) {
}

public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
this.surfaceHolder = holder;
}

public void onActivityResult(int requestCode, int resultCode, Intent data)
{





}


   
  

}