getandroiddeviceid

public String getTapjoyDeviceID()
{
	String udid = null;
	
	// Try to get IMEI/MEID.
	TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
	if (telephonyManager != null)
	{
		String imei = telephonyManager.getDeviceId();
		if (imei != null)
			udid = imei.toLowerCase();
	}
 
 	// Invalid UDID, try to get serial.
	if (udid == null || udid.length() == 0)
	{
		String id = getSerialID();
 
		if (id != null)
			udid = id.toLowerCase();
        }
        
        return udid;
}
 
public String getAndroidID()
{
	return Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
}
 
public String getSerialID()
{
	String serial = null;
	try
	{
		// android.os.Build.SERIAL
		Class<?> clazz = Class.forName("android.os.Build");
		Field field = clazz.getDeclaredField("SERIAL");
		
		if (field.isAccessible() == false)
			field.setAccessible(true);
		
		serial = field.get(android.os.Build.class).toString();
	}
	catch (Exception e)
	{
		e.printStackTrace();
	}
	
	return serial;
}