close drawer on item click

[virajt71]

Hi...
I am trying to close drawer automatically when any item clicked in drawer. Have set new intent on item click and it work fine. But when i add code for close drawer on click of new intent the App crashes.

[mxn21]

Can you give me the log for the App crash？thanks

[virajt71]

Here is the code:
`public class MenuListFragment extends Fragment {

ImageView ivMenuUserProfilePhoto;
DrawerLayout mDrawerLayout;

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_menu, container,
            false);
    mDrawerLayout = (DrawerLayout) view.findViewById(R.id.drawer_layout);
    ivMenuUserProfilePhoto = (ImageView) view.findViewById(R.id.ivMenuUserProfilePhoto);
    NavigationView vNavigation = (NavigationView) view.findViewById(R.id.vNavigation);
    vNavigation.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(MenuItem menuItem) {
            Toast.makeText(getActivity(),menuItem.getTitle(),Toast.LENGTH_SHORT).show();
            int id = menuItem.getItemId();
            Intent i = null;
            if (id == R.id.menu_settings){
                i = new Intent(getActivity().getApplicationContext(), SettingActivity.class);
            }
            startActivity(i);
            mDrawerLayout.closeDrawer(GravityCompat.START);
            return true;
        }
    });
    setupHeader();
    return  view ;
}

private void setupHeader() {
    int avatarSize = getResources().getDimensionPixelSize(R.dimen.global_menu_avatar_size);
    String profilePhoto = getResources().getString(R.string.user_profile_photo);
    Picasso.with(getActivity())
            .load(profilePhoto)
            .placeholder(R.drawable.img_circle_placeholder)
            .resize(avatarSize, avatarSize)
            .centerCrop()
            .transform(new CircleTransformation());
}

}`

log :
04-26 10:13:45.348 16915-16915/com.example.soulreaper.automation E/UncaughtException: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v4.widget.DrawerLayout.closeDrawer(int)' on a null object reference
at com.example.soulreaper.automation.activity.MenuListFragment$1.onNavigationItemSelected(MenuListFragment.java:52)
at android.support.design.widget.NavigationView$1.onMenuItemSelected(NavigationView.java:156)
at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822)
at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:156)
at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:969)
at android.support.design.internal.NavigationMenuPresenter$1.onClick(NavigationMenuPresenter.java:342)
at android.view.View.performClick(View.java:5612)
at android.view.View$PerformClick.run(View.java:22285)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)

[mxn21]

you can't get mDrawerLayout object in MenuListFragment, because it's in MainActivity's layout .
You can define a method in MainActivity：
public void closeMenu() {
if (mDrawer.isMenuVisible()) {
mDrawer.closeMenu();
}
}

and in MenuListFragment use ： ((MainActivity)getActivity()).closeMenu() ;

[virajt71]

I did try this method but maybe i have put some thing else instead of
"((MainActivity)getActivity()).closeMenu() ;" so, it did not work. Thanks for the solution.