jason lee xchenLee

## udid-faq.md

      
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                xchenLee
                / udid-faq.md
            
            
              Created
              August 8, 2017 11:25
                — forked from hujunfeng/udid-faq.md
            
              
                UDID, identifierForVendor and advertisingIdentifier FAQ
              
          
    What's the difference between UUID, GUID and UDID?


UUID (Universally Unique Identifier): A sequence of 128 bits that can guarantee uniqueness across space and time, defined by [RFC 4122][rfc4122].


GUID (Globally Unique Identifier): Microsoft's implementation of the UUID specification; often used interchangeably with UUID.


UDID _(Unique Device Identifier)): A sequence of 40 hexadecimal characters that uniquely identify an iOS device (the device's Social Security Number, if you will). This value can be retrieved through iTunes, or found using UIDevice -uniqueIdentifier. Derived from hardware details like MAC address.


Is UDID deprecated?


## CollapsingTitleLayout.java
/*
 * Copyright 2014 Chris Banes
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
	/*
	* Copyright 2014 Chris Banes
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software