Auto fill the custom email to EditText
<declare-styleablename="AutoFillEmailEditText">
<attrname="AutoFillEmailEditText_domains"format="string"/> //email's domain, split ','(en) and first char must be with '/'
<attrname="AutoFillEmailEditText_default_drop_down_key_color"format="color"/>//drop down word color
<attrname="AutoFillEmailEditText_default_drop_down_bg"format="reference"/>//drop down bg
<attrname="AutoFillEmailEditText_default_drop_down_divider"format="boolean"/>//drop down divider
</declare-styleable><com.len.library.AutoFillEmailEditText
android:id="@+id/et_mail"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_marginTop="10dp"android:drawablePadding="10dp"android:hint="邮箱地址"android:singleLine="true"android:textSize="15sp"app:AutoFillEmailEditText_default_drop_down_divider="true"app:AutoFillEmailEditText_domains="/@qq.com,@gmail.com,@126.com,@163.com" //notice
/>