How do I change the tint and background tint of the fab in the main activities?

Question

I can't run my app because when I add a backgroundTint I get an error upon running my app.

Please someone help, here is my main activity file, where the fab is located.

! https://imgur.com/gallery/pHKq5

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    app:fabSize="normal"
    app:srcCompat="@android:drawable/ic_input_add"/>

Answer 1

转到sdk管理器> sdk工具> google play服务对其进行更新