//選擇鈴聲 
 public void toChoose(View view) { 
  Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER); 
  intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION); 
  intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "設(shè)置通知鈴聲"); 
  if (myUriStr != null) { 
   <span >intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, Uri.parse(myUriStr));</span>//將已經(jīng)勾選過的鈴聲傳遞給系統(tǒng)鈴聲界面進(jìn)行顯示 
  } 
  startActivityForResult(intent, 0); 
 } 
 
 
 @Override 
 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
  try { 
   <span >Uri pickedUri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);</span>//獲取用戶選擇的鈴聲數(shù)據(jù) 
   myUriStr = pickedUri.toString(); 
 
  } catch (Exception e) { 
   e.printStackTrace(); 
  } 
 } 

//播放鈴聲 
 public void toPlay(View view) { 
  if (myUriStr == null) {//如果未自定義鈴聲，則調(diào)用系統(tǒng)默認(rèn)的鈴聲 
   mMediaPlayer = MediaPlayer.create(this, getSystemDefaultRingtoneUri()); 
  } else { 
   mMediaPlayer = MediaPlayer.create(this, Uri.parse(myUriStr)); 
 
   if(mMediaPlayer == null){ 
    Toast.makeText(this,"該鈴聲不存在，請重新選擇",Toast.LENGTH_LONG).show(); 
    return; 
   } 
  } 
  mMediaPlayer.setLooping(false); 
  try { 
   mMediaPlayer.prepare(); 
  } catch (IllegalStateException e) { 
   e.printStackTrace(); 
  } catch (IOException e) { 
   e.printStackTrace(); 
  } 
 
  mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { 
   @Override 
   public void onPrepared(MediaPlayer mediaPlayer) { 
    mMediaPlayer.start(); 
   } 
  }); 
 } 

<!-- 往SDCard寫入數(shù)據(jù)權(quán)限 --> 
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
 <!-- 在SDCard中創(chuàng)建與刪除文件權(quán)限 --> 
 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>