I believe your xml should look like this with "android:id" instead of
just "id".
<CheckBox android:id="@+id/checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
On Mar 17, 10:25 am, zeeshan <genx...@gmail.com> wrote:
> i changed the id but still same Null object.
> same result for TextView and ProgressBar as well, however i can use
> EditText successfully.
>
> On Mar 17, 5:04 pm, dan raaka <danra...@gmail.com> wrote:
>
> > Try changing the id and see if it makes any difference.
>
> > -Dan
>
> > On Tue, Mar 17, 2009 at 9:46 AM, zeeshan <genx...@gmail.com> wrote:
>
> > > Hi Android Experts,
>
> > > why CheckBox is always null.
>
> > > please find the error in my code:
>
> > > xml-
>
> > > <CheckBox id="@+id/checkbox"
> > > android:layout_width="wrap_content"
> > > android:layout_height="wrap_content"
> > > />
>
> > > code file-
>
> > > package com.reblogr.reblogrclient;
>
> > > public class Test extends Activity {
> > > /** Called when the activity is first created. */
>
> > > public CheckBox checkbox;
>
> > > @Override
> > > public void onCreate(Bundle savedInstanceState) {
>
> > > super.onCreate(savedInstanceState);
> > > setContentView(R.layout.login);
> > > Button connectButton = (Button)findViewById(R.id.objBtn1);
>
> > > checkbox= (CheckBox)findViewById(R.id.checkbox);
>
> > > connectButton.setOnClickListener(connectButtonListener);
> > > }
> > > public OnClickListener connectButtonListener = new OnClickListener
> > > ()
> > > {
> > > public void onClick(View v)
> > > {
>
> > > Athenticate();
>
> > > }
> > > };
> > > public void Athenticate(){
>
> > > if(checkbox.isChecked()){ //
> > > NullPointerException here
> > > //do something
>
> > > }
>
> > > }
>
> > > }
>
> > > why checkbox is null?- Hide quoted text -
>
> > - Show quoted text -
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