Android: Spinner adapter view type count must be 1

Question

Hello I run in a trouble running the app in Android 5.1 emulator. I have a screen contains Spinner.This Spinner works fine on my phone running android 4.0+. I received an error like this:

java.lang.IllegalArgumentException: Spinner adapter view type count must be 1 at android.widget.Spinner.setAdapter(Spinner.java:439)

I have override a method like this:

@Override
public int getItemViewType(int position) {

    return 0;
}

@Override
public int getViewTypeCount() {

    if (hasTitle())
        return _models.length+1;
    else
        return _models.length;
}

I know the _models.length is greater 0 when I debug it. GetItemViewType not get hit during debugging.

The main problem is I have two screen that has two spinner. The first screen is working after using the above code but the second screen not that lucky.

Does any have an idea why the error appear even though my _models does have value in it.

Sorry, I may have missed read the error.. Must be 1... But why must be 1??

getViewTypeCount() must be >= 1. This is because you need to have at least 1 type of View otherwise the adapter makes no sense. The only possiblity is that in your second screen _models.length == 0 and hasTitle() == false. — Charles Durham, Nov 23 '15 at 00:03

score 4 · Accepted Answer · answered Nov 23 '15 at 04:14

4

Simply make getViewTypeCount return 1.

This method allows you to inflate different layouts for different items. It, along with getViewType(), makes sure the correct type of View gets passed to getView() as convertView

answered Nov 23 '15 at 04:14

Fletcher Johns

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what does it mean by inflate different layouts for different items? – blackHawk Jul 18 '17 at 20:43
https://stackoverflow.com/questions/5300962/getviewtypecount-and-getitemviewtype-methods-of-arrayadapter – Fletcher Johns Jul 25 '17 at 07:03
Understood, could you answer my this question https://stackoverflow.com/questions/45286008/how-to-start-task-periodically-using-firebase-job-scheduler – blackHawk Jul 25 '17 at 07:09

Android: Spinner adapter view type count must be 1

1 Answers1