CODEWITHSUNDEEP
javaandroidpopupwindow
VojtaStruhar
VojtaStruhar

Reputation: 651

Creating PopupView from button in ListView in Fragment

I'm trying to implement popup view into my app with bottom navigation (I'm using fragments for every item in navigation). In one fragment I have ListView with items. Each Item has button in it and I want to create popup view that tells further info about its item.

I have tried creating popups in separate apps on activities and it worked just fine, therefore I assume this is problem of slightly complicated structure of my app. (Activity - fragment - listView - Item - button that summons popup)

Here is my code:

Fragment: 

public class myFragment extends Fragment implements myListAdapter.EventListener {

...

@Override
public void setPopupLayout() {

    Log.d(TAG, "setPopupLayout");

    LayoutInflater layoutInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View popupView =  layoutInflater.inflate(R.layout.popup_compressors, null);

    PopupWindow popupWindow = new PopupWindow(popupView, 500, 500, true);

    TextView textView = popupView.findViewById(R.id.popup_details);
    textView.setText("xd");

    // Here the error seems to occur
    popupWindow.showAtLocation(popupLayout, Gravity.NO_GRAVITY ,400, 400);
}

Adapter:

public class myAdapter extends ArrayAdapter<Compressor>
{
private static final String TAG = "Compressor Adapter";

EventListener myListener;

// (...)

@NonNull
@Override
public View getView(final int position, @Nullable View convertView, @NonNull ViewGroup parent) {

// (...)  

    Button button = convertView.findViewById(R.id.comp_details);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Log.d(TAG, "onClick: button");
            myListener.setPopupLayout();
        }
    });
    return convertView;
}

When I click the button in listView, app prints both Log.d(TAG, "onClick: button"); and Log.d(TAG, "setPopupLayout");. Then NullPointerExeption is thrown:

java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.getRootView()' on a null object reference

and this line gets highlited:

popupWindow.showAtLocation(popupLayout, Gravity.NO_GRAVITY ,400, 400);

I'm still new to android and I will be so thankful for any piece of advice! Thanks for reading

EDIT:

I think I found the issue, in

popupWindow.showAtLocation(popupLayout, Gravity.NO_GRAVITY ,400, 400);

I use popupLayout which is assigned in onViewCreated as

popupLayout = (RelativeLayout) view.findViewById(R.id.relative);

and this is assigned as null (which seems to be causing the error).

Upvotes: 1

Views: 236

Answers (2)

VojtaStruhar
VojtaStruhar

Reputation: 651

replace popupWindow.showAtLocation(popupLayout, Gravity.NO_GRAVITY ,400, 400);

by popupWindow.showAtLocation(getView(), Gravity.NO_GRAVITY ,400, 400);

Upvotes: 1

TheCoderGuy
TheCoderGuy

Reputation: 883

Try something like this

Fragment.class

View popupView =  layoutInflater.inflate(R.layout.popup_compressors, null);
final PopupWindow popupWindow = new PopupWindow(popupView, 500, 500);

popupWindow.showAtLocation(popupLayout, Gravity.NO_GRAVITY ,400, 400);

Upvotes: 0

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