FragmentTransaction ftrans = getFragmentManager().beginTransaction();
        if (id == R.id.nav_camera) {
            ftrans.replace(R.id.container, fimport);
            // Handle the camera action
        } else if (id == R.id.nav_gallery) {
            ftrans.replace(R.id.container, fgallary);

        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }
        ftrans.commit();

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.ikolganov.navdrawer, PID: 5456
    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
        at android.app.BackStackRecord.doAddOp(BackStackRecord.java:425)
        at android.app.BackStackRecord.replace(BackStackRecord.java:470)
        at android.app.BackStackRecord.replace(BackStackRecord.java:462)
        at com.example.ikolganov.navdrawer.MainActivity.onNavigationItemSelected(MainActivity.java:99)
        at android.support.design.widget.NavigationView$1.onMenuItemSelected(NavigationView.java:170)
        at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:840)
        at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:158)
        at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:991)
        at android.support.design.internal.NavigationMenuPresenter$1.onClick(NavigationMenuPresenter.java:352)
        at android.view.View.performClick(View.java:6597)
        at android.view.View.performClickInternal(View.java:6574)
        at android.view.View.access$3100(View.java:778)
        at android.view.View$PerformClick.run(View.java:25885)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)