Notification Bar is grey after implementing Nav Drawer

Question

I am trying to learn implementations of Navigation Drawer in Android.

In one activity, i have made the Navigation Drawer come under the Status Bar(transparent) and over

Answer 1

But here, the status bar turns grey for some reason

It's the translucent (25% black) status bar background over the white background of activity underneath it.

What i want to know is how to make the status normal

You need to disable translucent status bar for the second activity. It is activated by this line in your theme definition:

<item name="android:windowTranslucentStatus">true</item>
<item name="android:statusBarColor">@color/primary_dark</item>

So either define a child theme and override the flag with false or clear the flag programmatically by calling this from your activity:

if (Build.VERSION.SDK_INT >= 21) {
    getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    getWindow().setStatusBarColor(getResources().getColor(R.color.primary_dark);
}