Disable dark fading in Navigation Drawer

drawerLayout.setScrimColor(Color.parseColor("#99000000"));

// For dark fading effect

                            or

drawerLayout.setScrimColor(Color.parseColor("#33000000"));

// For light fading effect

                            or

drawerLayout.setScrimColor(Color.TRANSPARENT);

// For no Fading

Addition to koso's answer: you can directly call the colors from Color class like this:

mDrawerLayout.setScrimColor(Color.TRANSPARENT);

You can use setScrimColor(int color) method. As default color is used 0x99000000. So if you don't want faded background, set transparent color in this method.

mDrawerLayout.setScrimColor(getResources().getColor(android.R.color.transparent));