如何获得Android设备唯一ID？

How can I get android device Unique ID?

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Possible Duplicate:
Is there a unique Android device ID?

我使用下面的代码来获取Android设备IMEI，以及如何更改下面的代码来获取Android设备唯一的ID。

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String getDeviceID1(TelephonyManager phonyManager){
String id = phonyManager.getDeviceId();
if (id == null){
id ="not available";
}
int phoneType = phonyManager.getPhoneType();
switch(phoneType){
case TelephonyManager.PHONE_TYPE_NONE:
return"" + id;

case TelephonyManager.PHONE_TYPE_GSM:
return"" + id;

case TelephonyManager.PHONE_TYPE_CDMA:
return"" + id;

/*
* for API Level 11 or above
* case TelephonyManager.PHONE_TYPE_SIP:
* return"SIP";
*/

default:
return"" + id;
}

//I used to show IMEI

TextView textDeviceID = (TextView)findViewById(R.id.deviceid);
//retrieve a reference to an instance of TelephonyManager
TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
textDeviceID.setText(getDeviceID1(telephonyManager));
}