嗨，我有一个 findViewById 错误

Question

public class HomeFragment extends BasePageFragment {
    private Unbinder unbinder;


//    @BindView(R.id.fab)
//    FloatingActionButton mFab;

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_homepage, container, false);


    ImageButton ImageButton = (ImageButton) FindViewById (R.id.imageButton);
    ImageButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Uri uri = Uri.parse("https://play.google.com/store/apps/details?id=com.mowmo.minimale");
            startActivity(new Intent(Intent.ACTION_VIEW, uri));
        }
    });

}

Answer 1

Your problem starts here:

return inflater.inflate(R.layout.fragment_homepage, container, false);

None of the code following this statement will ever execute since you've already returned the inflated View. Change it to this:

View rootview = inflater.inflate(R.layout.fragment_homepage, container, false);


ImageButton ImageButton = (ImageButton) rootview.findViewById (R.id.imageButton);
ImageButton.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {
          Uri uri = Uri.parse("https://play.google.com/store/apps/details?id=com.mowmo.minimale");
          startActivity(new Intent(Intent.ACTION_VIEW, uri));
        }
    });

return rootview;

This inflates the view and allows you to access the child views on the inflated view (using the findViewById method) before returning the view.