如何判断android 短信发送(sendTextMessage)是否成功

//短信发送API说明

SmsManager smsManager = SmsManager.getDefault();  
smsManager.sendTextMessage(String destinationAddress, String scAddress, String text, PendingIntent sentIntent, PendingIntent deliveryIntent);	 
	/** 
	 * 参数说明 
	 * destinationAddress:收信人的手机号码 
	 * scAddress:发信人的手机号码  
	 * text:发送信息的内容  
	 * sentIntent:发送是否成功的回执，用于监听短信是否发送成功。 
	 * DeliveryIntent:接收是否成功的回执，用于监听短信对方是否接收成功。 
	 */  

//短信群发

	for (int i = 0; i < contactList.size(); i++) {  
		Intent itSend = new Intent(SENT_SMS_ACTION);  
		itSend.putExtra(KEY_PHONENUM, contactList.get(i));  
		PendingIntent mSendPI = PendingIntent.getBroadcast(getApplicationContext(), i/××requestCode××/, itSend, PendingIntent.FLAG_ONE_SHOT/××flag××/);//这里requestCode和flag的设置很重要，影响数据KEY_PHONENUM的传递。  
		String content = mContext.getString(R.string.test);  
		smsManager.sendTextMessage(contactList.get(i), null, content, mSendPI, null);  
	}  



public static final String SENT_SMS_ACTION = "SENT_SMS_ACTION";  
private SMSSendResultReceiver mSMSReceiver = new SMSSendResultReceiver();  
private IntentFilter mSMSResultFilter = new IntentFilter();  


//广播注册

@Override  
	protected void onCreate(Bundle savedInstanceState) {  
		super.onCreate(savedInstanceState);  
		mSMSFilter.addAction(SENT_SMS_ACTION);  
		registerReceiver(mSMSReceiver, mSMSResultFilter);  
		...  
	}  

//广播定义


class SMSSendResultReceiver extends BroadcastReceiver  
{  
	@Override  
	public void onReceive(Context context, Intent intent)  
	{  
		String phoneNum = intent.getStringExtra(KEY_PHONENUM);  
		// TODO Auto-generated method stub  
			switch(getResultCode())  
			{  
				case Activity.RESULT_OK:  
					System.out.println("Send Message to "+phoneNum+" success!");  
					break;  
				case SmsManager.RESULT_ERROR_GENERIC_FAILURE:  
				case SmsManager.RESULT_ERROR_RADIO_OFF:  
				case SmsManager.RESULT_ERROR_NULL_PDU:  
				default:  
					System.err.println("Send Message to "+phoneNum+" fail!");  
					break;  
			}  
	}  
}