在android系统中，不同铃声存放的铃声路径：/system/media/audio/ringtones        来电铃声/system/media/audio/notifications        短信通知铃声/system/media/audio/alarms        闹钟铃声铃声的设置：import java.io.File;  import android.app.Activity;  import android.content.Intent;  import android.media.RingtoneManager;  import android.net.Uri;  import android.os.Bundle;  import android.view.View;  import android.widget.Button;  public class Activity01 extends Activity  {  /* 3个按钮 */  private Button mButtonRingtone;  private Button mButtonAlarm;  private Button mButtonNotification;  /* 自定义的类型 */  public static final int ButtonRingtone          = 0;  public static final int ButtonAlarm             = 1;  public static final int ButtonNotification      = 2;  /* 铃声文件夹 */  private String strRingtoneFolder = "/sdcard/music/ringtones";  private String strAlarmFolder = "/sdcard/music/alarms";  private String strNotificationFolder = "/sdcard/music/notifications";  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState)  {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);  mButtonRingtone = (Button) findViewById(R.id.ButtonRingtone);  mButtonAlarm = (Button) findViewById(R.id.ButtonAlarm);  mButtonNotification = (Button) findViewById(R.id.ButtonNotification);  /* 设置来电铃声 */  mButtonRingtone.setOnClickListener(new Button.OnClickListener()   {  @Override  public void onClick(View arg0)  {  if (bFolder(strRingtoneFolder))  {  //打开系统铃声设置  Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);  //类型为来电RINGTONE
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_RINGTONE);  //设置显示的title  intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置来电铃声");  //当设置完成之后返回到当前的Activity
                        startActivityForResult(intent, ButtonRingtone);  }  }  });  /* 设置闹钟铃声 */  mButtonAlarm.setOnClickListener(new Button.OnClickListener()   {  @Override  public void onClick(View arg0)  {  if (bFolder(strAlarmFolder))  {  //打开系统铃声设置  Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);  //设置铃声类型和title
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_ALARM);  intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置闹铃铃声");  //当设置完成之后返回到当前的Activity
                        startActivityForResult(intent, ButtonAlarm);  }  }  });  /* 设置通知铃声 */  mButtonNotification.setOnClickListener(new Button.OnClickListener()   {  @Override  public void onClick(View arg0)  {  if (bFolder(strNotificationFolder))  {  //打开系统铃声设置  Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);  //设置铃声类型和title
                        intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION);  intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "设置通知铃声");  //当设置完成之后返回到当前的Activity
                        startActivityForResult(intent, ButtonNotification);  }  }  });  }  /* 当设置铃声之后的回调函数 */  @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data)  {  // TODO Auto-generated method stub  if (resultCode != RESULT_OK)  {  return;  }  switch (requestCode)  {  case ButtonRingtone:  try  {  //得到我们选择的铃声  Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);  //将我们选择的铃声设置成为默认  if (pickedUri != null)  {  RingtoneManager.setActualDefaultRingtoneUri(Activity01.this, RingtoneManager.TYPE_RINGTONE, pickedUri);  }  }  catch (Exception e)  {  }  break;  case ButtonAlarm:  try  {  //得到我们选择的铃声  Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);  //将我们选择的铃声设置成为默认  if (pickedUri != null)  {  RingtoneManager.setActualDefaultRingtoneUri(Activity01.this, RingtoneManager.TYPE_ALARM, pickedUri);  }  }  catch (Exception e)  {  }  break;  case ButtonNotification:  try  {  //得到我们选择的铃声  Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);  //将我们选择的铃声设置成为默认  if (pickedUri != null)  {  RingtoneManager.setActualDefaultRingtoneUri(Activity01.this, RingtoneManager.TYPE_NOTIFICATION, pickedUri);  }  }  catch (Exception e)  {  }  break;  }  super.onActivityResult(requestCode, resultCode, data);  }  //检测是否存在指定的文件夹   //如果不存在则创建  private boolean bFolder(String strFolder)  {  boolean btmp = false;  File f = new File(strFolder);  if (!f.exists())  {  if (f.mkdirs())  {  btmp = true;  }  else  {  btmp = false;  }  }  else  {  btmp = true;  }  return btmp;  }  }  铃声的播放：player = new MediaPlayer();  try{  player.setDataSource(context, pickUri);  }catch(Exception e){  e.printStackTrace();  }  final AudioManager  audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);  if(audioManager.getStreamVolume(AudioManager.STREAM_ALARM)!=0){  player.setAudioStreamType(AudioManager.STREAM_ALARM);  player.setLooping(true);  try {  player.prepare();  } catch (Exception e) {  // TODO Auto-generated catch block
        e.printStackTrace();  }  player.start();  }