I'm having trouble to highlight the right option in the navigation drawer and asked here in Stackoverflow about it. Now I'm having trouble with the answers I got. To be concrete, this is the error message I'm getting from Android Studio: 'Attempt to invoke virtual method 'android.view.Menu android.support.design.widget.NavigationView.getMenu()' on a null object reference' and it is referred to these lines of code.
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
navId = item.getItemId();
clearChecked();
navigationView.getMenu().findItem(navId).setChecked(true);
if (navId == R.id.nav_home) {
// Handle the action
} else if (navId == R.id.nav_my_profile){
Intent intent = new Intent(this, MyProfile.class);
startActivity(intent);
} else if (navId == R.id.nav_buy_puntos) {
} else if (navId == R.id.nav_settings){
} else if (navId == R.id.nav_share) {
} else if (navId == R.id.nav_feedback) {
Intent intent = new Intent(this, FeedbackActivity.class);
startActivity(intent);
} else if (navId == R.id.nav_help) {
} else if (navId == R.id.nav_log_out){
finish();
BaseActivity.hideProgressDialog();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
private void clearChecked() {
int size = navigationView.getMenu().size();
for (int i = 0; i < size; i++) {
navigationView.getMenu().getItem(i).setChecked(false);
}
}
