Android Development Wonderful problem: Notification bar color change

This problem I am also drunk, tangled for a long while, tried without several methods, but is not responding.

Later found that this feature requires Android 5.0 or more version, a look at my test machine is 4.7, I was excited, immediately changed a test,

and eggs ah, there is wood!!!

But there is a discovery: I want to set the notification bar to Green, toolbar is also green, the main page because business needs are not used toolbar so next to the notification bar is white.

The point is that all the notification bars using toolbar should be green, but switching back to the main page notification bar has become the default color.

On the internet for a long while do not know what the reason.

If the great God is passing by, ask for advice.

Android Development Wonderful problem: Notification bar color change