Null Pointer Exception when setting spinner adapter

Question

I made a spinner with two items, and i wanted to change the text color to white so i made an xml...

<?xml version="1.0" encoding="utf-8"?>

<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="@android:color/white" />

I tried to do this to set the adapter....

    spinner = (Spinner) findViewById(R.id.spinner);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.spinner_text);
    spinner.setAdapter(adapter);

But it gives me an error! It says there's a null pointer exception at the, spinner.setAdapter(), line. I've seen other questions with people doing this and it actually working so i dont know what's going on. Here's the code for the spinner....

        <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:entries="@array/sEntries" />

The initial problem has been fixed, but now it's not showing any of the entries.

show us how you are defining your spinner in your view(xml). — broschb, Aug 01 '13 at 02:20
Calling findViewById() too early? Per http://stackoverflow.com/questions/3264610/findviewbyid-returns-null. — jarmod, Aug 01 '13 at 02:27
Yeah i had to move it down to another part of the code. It just doesn't show the entries now. — ThatBoiJo, Aug 01 '13 at 02:28
For testing, try create a `textViewResourceId` or `T[] objects` and include it in `ArrayAdapter(context, resourceId, textViewResourceId|T[] objects)`. Spinner does not know how to render an empty adapter properly. — LightYearsBehind, Aug 01 '13 at 02:32
And what is the result? Please update your code to prevent any miscommunication. — LightYearsBehind, Aug 01 '13 at 02:44

score 1 · Accepted Answer · answered Aug 01 '13 at 02:22

1

Are you inflating the xml layout where you defined your spinner ? That is a very common reason for NPE. You need to inflate the layout before using resources defined in it.

answered Aug 01 '13 at 02:22

Manu

81
1
5

Thanks, I had to move it somewhere else, and it took away the error, but it's not showing the entries now. – ThatBoiJo Aug 01 '13 at 02:26
Check if the array adapter you defined is null ? – Manu Aug 01 '13 at 02:36

Null Pointer Exception when setting spinner adapter

1 Answers1