How to move a view above Snackbar just like FloatingButton

I’m going to elaborate on the approved answer because I think there’s a slightly simpler implementation than that article provides.

I wasn’t able to find a built-in behavior that handles a generic moving of views, but this one is a good general purpose option (from http://alisonhuang-blog.logdown.com/posts/290009-design-support-library-coordinator-layout-and-behavior linked in another comment):

import android.content.Context;
import android.support.annotation.Keep;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.Snackbar;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.View;

@Keep
public class MoveUpwardBehavior extends CoordinatorLayout.Behavior<View> {

    public MoveUpwardBehavior() {
        super();
    }

    public MoveUpwardBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean layoutDependsOn(CoordinatorLayout parent, View child, View dependency) {
        return dependency instanceof Snackbar.SnackbarLayout;
    }

    @Override
    public boolean onDependentViewChanged(CoordinatorLayout parent, View child, View dependency) {
        float translationY = Math.min(0, ViewCompat.getTranslationY(dependency) - dependency.getHeight());
        ViewCompat.setTranslationY(child, translationY);
        return true;
    }

    //you need this when you swipe the snackbar(thanx to ubuntudroid's comment)
    @Override
    public void onDependentViewRemoved(CoordinatorLayout parent, View child, View dependency) {
        ViewCompat.animate(child).translationY(0).start();
    }
}

then, in your layout file add a layout_behavior as below:

<LinearLayout
    android:id="@+id/main_content"
    android:orientation="vertical"
    app:layout_behavior="com.example.MoveUpwardBehavior"/>

where the layout_behavior is the full path to your custom behavior. There’s no need to subclass LinearLayout unless you have a specific need to have a default behavior, which seems uncommon.