<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:layout_width="match_parent"
android:layout_height="match_parent"
android:hint="用戶名/郵箱:"
android:inputType="textEmailAddress|text"
android:maxLength="10"/>
</android.support.design.widget.TextInputLayout>
使用方法很簡(jiǎn)單恳谎，只要在里面包一個(gè)EditTextView即可
