怎么在Android应用中添加一个消息提示音功能

// 获得RingtoneManager对象 
RingtoneManager manager = new RingtoneManager(this); 
// 设置RingtoneManager对象的类型为TYPE_NOTIFICATION，这样只会获取到notification的对应内容 
manager.setType(RingtoneManager.TYPE_NOTIFICATION); 
Cursor cursor = manager.getCursor(); 
int num = cursor.getCount(); 
Log.i("tag", num + "消息音个数"); 
// 存储消息音名字的arrayList 
ArrayList ringtoneList = new ArrayList(); 
for (int i = 0; i < num; i++) { 
 //获取当前i的铃声信息 
 Ringtone ringtone = manager.getRingtone(i); 
 //获取当前i的uri，设置notification的自定义铃声要用到 
 Uri uri = manager.getRingtoneUri(i); 
 //获取到当前铃声的名字 
 String title = ringtone.getTitle(this); 
 ringtoneList.add(title); 
} 

package jz.his.activity; 

import java.util.ArrayList; 

import jz.his.adapter.RingtoneAdapter; 
import jz.his.jzhis.R; 
import jz.his.util.SharedPreferenceUtil; 
import android.app.Activity; 
import android.content.Intent; 
import android.database.Cursor; 
import android.media.Ringtone; 
import android.media.RingtoneManager; 
import android.net.Uri; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.Window; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.ListView; 

public class RingtoneActivity extends Activity { 
 ArrayList ringtoneList; 
 ListView listView; 
 RingtoneManager manager; 
 RingtoneAdapter adapter; 
 String ringName = ""; 

 /** 
  * 选择铃声的uri 
  */ 
 Uri uri = null; 

 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  requestWindowFeature(Window.FEATURE_NO_TITLE); 
  setContentView(R.layout.activity_ringtone); 
  listView = (ListView) findViewById(R.id.ringtone); 
  getRingtone(); 
  // initRingtoneManager(); 

  // ringtoneList = FunctionActivity.ringtoneList; 
  adapter = new RingtoneAdapter(this, ringtoneList, getIndex()); 
  listView.setAdapter(adapter); 
  // 设置从第getIndex()行开始显示 
  listView.setSelection(getIndex()); 
  listView.setOnItemClickListener(new OnItemClickListener() { 

   @SuppressWarnings("static-access") 
   @Override 
   public void onItemClick(AdapterView<?> parent, View view, 
     int position, long id) { 
    // 当点击的item是第一个“跟随系统”时 
    if (position == 0) { 
     // 得到系统默认的消息uri 
     Uri defalutUri = manager 
       .getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); 
     // 通过URI获得系统默认的Ringtone发出声音 
     Ringtone defalutRingtone = manager.getRingtone( 
       RingtoneActivity.this, defalutUri); 
     defalutRingtone.play(); 
     ringName = "跟随系统"; 
     uri = null; 
    } else { 
     // 当点击的item不是第一个“跟随系统”时，获得的铃声要减一才对 
     Ringtone ringtone = manager.getRingtone(position - 1); 
     uri = manager.getRingtoneUri(position - 1); 
     ringtone.play(); 
     ringName = ringtone.getTitle(RingtoneActivity.this); 

    } 
    adapter.first = new int[ringtoneList.size()]; 
    if (adapter.first[position] == 0) { 
     adapter.first[position] = 1; 
    } else { 
     adapter.first[position] = 0; 
    } 
    adapter.notifyDataSetChanged(); 

   } 
  }); 
 } 

 /** 
  * 初始化RingtoneManager对象，在listview的点击事件里面，用到了 
  */ 
 private void initRingtoneManager() { 
  manager = new RingtoneManager(this); 
  manager.setType(RingtoneManager.TYPE_NOTIFICATION); 
  manager.getCursor(); 
 } 

 /** 
  * 得到当前铃声的行数 
  */ 
 private int getIndex() { 
  for (int i = 0; i < ringtoneList.size(); i++) { 
   if (SharedPreferenceUtil.getString(RingtoneActivity.this, 
     SharedPreferenceUtil.RINGTONE_NAME).equals( 
     ringtoneList.get(i))) { 
    return i; 
   } 
  } 
  return 0; 
 } 

 /** 
  * 得到ringtone中的所有消息声音 
  */ 
 private void getRingtone() { 
  manager = new RingtoneManager(this); 
  manager.setType(RingtoneManager.TYPE_NOTIFICATION); 
  Cursor cursor = manager.getCursor(); 
  int num = cursor.getCount(); 
  Log.i("tag", num + "消息音个数"); 
  ringtoneList = new ArrayList(); 
  for (int i = -1; i < num; i++) { 
   if (i == -1) { 
    ringtoneList.add("跟随系统"); 
   } else { 
    Ringtone ringtone = manager.getRingtone(i); 
    // Uri uri = manager.getRingtoneUri(i); 
    String title = ringtone.getTitle(this); 
    ringtoneList.add(title); 
   } 

  } 
 } 

 public void allClick(View v) { 
  switch (v.getId()) { 
  case R.id.back_button: 
   finish(); 
   break; 
  case R.id.save: 
   if (ringName == "") { 
    // 没有改动铃声直接关闭界面 
    finish(); 
   } else { 
    // 已经改动uri，如果又选择了跟随系统，则uri为null，其他的就是uri本身 
    if (uri == null) { 
     SharedPreferenceUtil.setString(RingtoneActivity.this, 
       SharedPreferenceUtil.url_string, ""); 
    } else { 
     SharedPreferenceUtil.setString(RingtoneActivity.this, 
       SharedPreferenceUtil.url_string, uri.toString()); 
    } 

    Intent intent = new Intent(); 
    intent.putExtra("ringName", ringName); 
    intent.setClass(RingtoneActivity.this, FunctionActivity.class); 
    startActivity(intent); 
   } 
  default: 
   break; 
  } 
 } 
} 

Bitmap btm = BitmapFactory.decodeResource(getResources(), 
  R.drawable.ic_launcher); 
// 这里大图标，小图标刚好相反 
NotificationCompat.Builder builder = new NotificationCompat.Builder( 
  this).setSmallIcon(R.drawable.ic_launcher) 
  .setContentTitle(title).setContentText(content) 
  .setTicker(tickerText); 

if (SharedPreferenceUtil 
  .getBoolean(this, SharedPreferenceUtil.IS_SOUND)) { 

} else { 
 // 如果消息声音开启 
 if (!SharedPreferenceUtil.getStringNull(OnlineService.this, 
   SharedPreferenceUtil.url_string).equals("")) { 
  // 如果选择了其他的系统声音 
  builder.setSound(Uri.parse(SharedPreferenceUtil.getString( 
    OnlineService.this, SharedPreferenceUtil.url_string))); 
 } else { 
  // 默认的系统声音 
  builder.setDefaults(Notification.DEFAULT_SOUND); 
 } 
} 

if (SharedPreferenceUtil.getBoolean(this, 
  SharedPreferenceUtil.IS_VIBRATE)) { 

} else { 
 builder.setDefaults(Notification.DEFAULT_VIBRATE); 
} 
// 构建一个Intent 
Intent intent = new Intent(this, FunctionActivity.class); 

intent.putExtra("messageData","messageData" ); 
sendData(); 
// 封装一个Intent 
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, 
  intent, PendingIntent.FLAG_ONE_SHOT); 
// 设置通知主题的意图 
builder.setContentIntent(pendingIntent); 
// 获取通知管理器对象 
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
notificationManager.notify(id, builder.build()); 

/** 
 * 选择消息提示音后，跳转到功能界面后，直接将其跳转设置界面 
*/ 
private void selectRingtone() { 
  String ringName = getIntent().getStringExtra("ringName"); 
  Log.e("tag", ringName+"传过来的值"); 
  if (ringName != null) { 
   pager.setCurrentItem(2); 
  } 
 }