How to open navigation drawer on button click in main fragment?

Question

I have made an app with one activity which uses a navigation drawer to open a number of different fragments. I have the actionbar drawertoggle, but it is not very visible. I

Answer 1

if you are using from default navigation activity in android you just have to add this code in click listener of button --->

mDrawerLayout.openDrawer(Gravity.START);

for closing you do not have to do something.