Appcompat v21 Toolbar elevation pre-lollipop

Question

First off, I know that this question has been asked before, but it hasn\'t been answered before. I hope someone can give me an answer.

In my application, I use the T

Answer 1

Using CardView container for toolbar is a bad idea.

CardView is heavy, especially for low end devices.

The best way is to put a gradient Shadow view below the toolbar. Shadow view must be a direct child to the coordinator layout. ie. The appbar which contains toolbar and shadow View must be siblings.

Add this view component to your layout.

The drawable toolbar_shadow.xml

This will solve the problems in pre-lollipop devices. But we don't want this shadow in lollipop and above devices so make visibility to gone in devices with lollipop and above.

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        findViewById(R.id.gradientShadow).setVisibility(View.GONE);
}

Done.