Actually I first tried with findViewById() but it failed & gave me Null
Pointer exception on Vg then I thought because the Vg is not initialized
thats why it might be failing so i did that way.
I m not sure weather it is ok..
thanks,
satish
On Fri, Jan 29, 2010 at 3:08 AM, Justin Anderson <janderson....@gmail.com>wrote:
> Probably because you have a null pointer... Logcat should be able to give
> you the name of the file and the line number where the problem occurs, but I
> would be willing to bet it is with this line:
>
>
> Vg V = new Vg(this); /* Vg is extending the ViewGroup */
>
> I'm surprised that the application even compiles successfully.... That line
> of code is not inside a method on your class so the "this" pointer is not
> available yet, which is probably where the NullPointerException is coming
> from.
>
> What is the point of doing that anyway, when you later assign V to
> something else with this line:
>
>
> V = (Vg) findViewById(R.id.Layout);
>
> Thanks,
> Justin
>
> ----------------------------------------------------------------------
> There are only 10 types of people in the world...
> Those who know binary and those who don't.
> ----------------------------------------------------------------------
>
>
> On Thu, Jan 28, 2010 at 6:58 AM, satish bhoyar <getsatonl...@gmail.com>wrote:
>
>> Hi all,
>>
>> I am trying to extend the ViewGroup in my application.
>> then from my main activity i will create a variable of type following is
>> the code snippet
>>
>> public class NewViewGrp extends Activity {
>>
>> Vg V = new Vg(this); /* Vg is extending the ViewGroup */
>> TextView Tv;
>>
>> /** Called when the activity is first created. */
>> @Override
>> public void onCreate(Bundle savedInstanceState) {
>> super.onCreate(savedInstanceState);
>> setContentView(R.layout.main);
>> V = (Vg) findViewById(R.id.Layout);
>> Tv = (TextView) findViewById(R.id.TextView1);
>> }
>>
>> But when I am running the app it is failing. In logcat i m getting error
>> as NullPointerException.
>>
>> What might be the reason?
>>
>> is it a correct way please tell the correct one.
>>
>> Thanks,
>> satish
>>
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