Email自动填充文本输入,源码EmailAutoCompleteTextView,EmailAutoCompleteTextView继承自系统的AutoCompleteTextView,实现根据输入关键字,自动弹出手机绑定邮箱中匹配的项。 EmailAutoCompleteTextView inherits from AutoCompleteTextView and uses the unique emails associated with the device to provide auto-complete functionality for email input fields. It also provides an "x" button on the right hand side as an easy way to clear text.