Spinner in dialog : NullPointerException

Question

Good Day i am using spinner inside dialog and it generating

Error msg- ` java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Spinner.setAdapter(android.widget.SpinnerAdapter)' on a null object reference at com.example.amw51.ygeianapp.Activity.AwardActivity.showAddItem(AwardActivity.java:259)

Java code

 dialog.setContentView(R.layout.job_add_detials_layout);
Spinner   jobSpinner = (Spinner)findViewById(R.id.select_job_spinner);
 jobSpinner = (Spinner) findViewById(R.id.select_job_spinner);
                List<String> list = new ArrayList<String>();
                list.add("Android");
                list.add("Java");
                list.add("Spinner Data");
                list.add("Spinner Adapter");
                list.add("Spinner Example");

                ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>
                        (this, android.R.layout.simple_spinner_item,list);

                dataAdapter.setDropDownViewResource
                        (android.R.layout.simple_spinner_dropdown_item);

                jobSpinner.setAdapter(dataAdapter);
 dialog.show();

XML Layout

 <Spinner
        android:id="@+id/select_job_spinner"
        android:layout_marginTop="15dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="15dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:textColor="@color/colorPrimary"/>

i have searched everywhere but didnt find any proper solution . `

if spinner is under dialog ui use `dialog.findViewById(R.id.select_job_spinner)` — Raghunandan, Apr 26 '17 at 11:56
i updated with dialog.findViewById but i am getting same error — Harsh Singhal, Apr 26 '17 at 12:01
probably does belong to a different layout. Should not be hard to fix it and you should find many examples on stackoverflow itself — Raghunandan, Apr 26 '17 at 12:02

score 3 · Accepted Answer · answered Apr 26 '17 at 11:56

3

You are not retrieving Spinner from dialog itself. You should be performing dialog.findViewById() instead of ordinary findViewById():

dialog.setContentView(R.layout.job_add_detials_layout);
dialog.create();
Spinner jobSpinner = (Spinner) dialog.findViewById(R.id.select_job_spinner);
// init spinner
dialog.show();

answered Apr 26 '17 at 11:56

azizbekian

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Still same error – Harsh Singhal Apr 26 '17 at 12:01
It's weird, but try to perform `findViewById` after `dialog.show()`. – azizbekian Apr 26 '17 at 12:02

Spinner in dialog : NullPointerException

1 Answers1