CODEWITHSUNDEEP
androiddialogspinner
Hadi
Hadi

Reputation: 727

Spinner in dialog - NullPointerException

I want to show custom dialog with a spinner. Strangely enough, I get NullPointerException when I try to set the adapter of the spinner...

Dialog dialog = new Dialog(this.getApplicationContext());
dialog.setContentView(R.layout.dialog_spinner);

ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, new String[] {"0","1","2"});

spin = (Spinner)dialog.findViewById(R.id.spinQ);
//What am I doing wrong here?
spin.setAdapter(spinnerAdapter);

dialog.setTitle("Questions");
dialog.show();

The xml layout code:

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:paddingLeft="10dip"
>

<Spinner 
android:id="@+id/spinQ" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content"
/> 


</LinearLayout>

UPDATE:

        AlertDialog alertDialog;


        LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.dialog_spinner,
                                       (ViewGroup) findViewById(R.id.root));

        ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,
              android.R.layout.simple_spinner_item, new String[] {"0","1","2"});
        spin = (Spinner) findViewById(R.id.spinQ);
        //I get the error in the following line:
        spin.setAdapter(spinnerAdapter);

        builder = new AlertDialog.Builder(mContext);
        builder.setView(layout);
        alertDialog = builder.create();
        alertDialog.show();

Upvotes: 4

Views: 4705

Answers (1)

kabuko
kabuko

Reputation: 36302

Your Spinner is probably not inflated yet. If you want to manipulate the views, inflate it yourself and then use setContentView on the inflated View. See the docs on Creating Dialogs.

Update:

In your new code, change:

spin = (Spinner) findViewById(R.id.spinQ);

to:

spin = (Spinner) layout.findViewById(R.id.spinQ);

Upvotes: 10

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