I've tried a lot, but can't make work an AutoCompleteTextView
float hint using the TextInputLayout
from support.
It's possible or I need to use an external library?
No .
include like this
<android.support.design.widget.TextInputLayout
android:id="@+id/til_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="125dp"
>
<AutoCompleteTextView
android:id="@+id/auto_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Id"
android:singleLine="true"/>
</android.support.design.widget.TextInputLayout>