CODEWITHSUNDEEP
androidspinnerandroid-alertdialogandroid-spinnercustomdialog
Vikram Gupta
Vikram Gupta

Reputation: 6516

Spinner in Dialog - NullPointerException - Android

I want to show a custom dialog with a spinner in it. But when i do I get NullPointerException at the setAdapter() method.I have been trying for over a week now and couldnt figure out how to get this right. here's my code: 

     AlertDialog alertDialog;

     LayoutInflater inflater = 
                 (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);                          
     View layout = inflater.inflate(R.layout.form,
                                    (ViewGroup) findViewById(R.id.layout_root));

     ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,
           android.R.layout.simple_spinner_item, new String[] {"0","1","2"});
     Spinner spinner = (Spinner) findViewById(R.id.spinner1);

    //I get the error in the following line:

    try{ 

         spinner.setAdapter(spinnerAdapter);

    }catch(Exception exception){
         Toast.makeText(getApplicationContext(),
    "Exception: "+exception,Toast.LENGTH_SHORT).show();
      }

     AlertDialog.Builder  builder = new AlertDialog.Builder(this);
     builder.setView(layout);
     alertDialog = builder.create();
     alertDialog.setTitle("Security");
     alertDialog.show();
   }

Here's the xml file form.xml:

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


  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:orientation="vertical"
   android:id="@+id/layout_root" >


   <Spinner
    android:id="@+id/spinner1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />

  </LinearLayout>

Please help me out. I've followed the link : Spinner in dialog - NullPointerException which discusses the same problem but i still couldnt do it.

Upvotes: 1

Views: 1363

Answers (2)

Code_Life
Code_Life

Reputation: 5902

Try this:

Spinner spinner = (Spinner)layout.findViewById(R.id.spinner1);

Upvotes: 2

kosa
kosa

Reputation: 66657

Spinner spinner = (Spinner) findViewById(R.id.spinner1); you can't do this here. You need to use layout.findviewById(...).. (I hope your layout_root has spinner).

Upvotes: 2

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