[android-developers] why do I get null pointer with findWiewById ?

Hi all,

I'm working on an application where I want to add adWhirl to manage
adds.
The app is working fine until I tryed to use adWhirl. I have try to
get the view created with setContentView(R.layout.main) by calling
LinearLayout layout = (LinearLayout)findViewById(R.layout.main);

and the pointer layout is null !

Here is my code :

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

//for AdWhirl Ads
LinearLayout layout = (LinearLayout)findViewById(R.layout.main);

AdWhirlLayout adWhirlLayout = new AdWhirlLayout(this,
"93b8db24920a42b297769f38d89304ba");
RelativeLayout.LayoutParams adWhirlLayoutParams = new
RelativeLayout.LayoutParams(320, 52);
layout.addView(adWhirlLayout, adWhirlLayoutParams);
layout.invalidate();
...
}

and the main.xml :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">

<RelativeLayout
android:id="@+id/titre"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#dcdcdc">
<ImageButton
android:id="@+id/info"
android:background="@null"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:padding="5sp"
android:src="@drawable/info"/>

<TextView
android:paddingTop="5sp"
android:paddingBottom="5sp"
android:gravity="center"
android:textSize="20sp"
android:background="#dcdcdc"
android:textColor="#000000"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/info"
android:text="@string/app_name"
/>
</RelativeLayout>

<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="0,1,2">

<TableRow>
<LinearLayout
android:orientation="vertical"
android:layout_marginTop="30px"
android:layout_marginBottom="15px"
android:layout_width="100px"
android:layout_height="wrap_content"
android:gravity="left">

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

<LinearLayout
android:orientation="vertical"
android:layout_marginTop="30px"
android:layout_marginBottom="15px"
android:layout_width="100px"
android:layout_height="wrap_content"
android:gravity="right">

<Spinner
android:id="@+id/spinner2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:prompt="@string/devise_prompt"
/>
</LinearLayout>
</TableRow>
</TableLayout>

<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="0,1,2">
<TableRow>
<TextView
android:id="@+id/amount1"
android:gravity="left"
android:paddingLeft="30px"
android:paddingBottom="15px"
android:text="@string/devise_amount"
android:textStyle="bold"
/>
<TextView
android:id="@+id/amount"
android:textStyle="bold"
/>
<TextView
android:id="@+id/amount2"
android:gravity="right"
android:paddingRight="30px"
android:paddingBottom="15px"
android:text="@string/devise_amount"
android:textStyle="bold"
/>
</TableRow>

<TableRow>
<EditText
android:id="@+id/edit_amount1"
android:layout_width="100px"
android:layout_height="wrap_content"
android:layout_marginBottom="10px"
android:gravity="left"
android:inputType="numberDecimal"/>

<ImageButton
android:id="@+id/egal"
android:background="@null"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginBottom="10px"
android:src="@drawable/equal"/>

<EditText
android:id="@+id/edit_amount2"
android:layout_width="100px"
android:layout_height="wrap_content"
android:layout_marginBottom="10px"
android:gravity="right"
android:inputType="numberDecimal" />
</TableRow>

</TableLayout>

<ImageButton
android:id="@+id/mataf"
android:background="@null"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="20px"
android:src="@drawable/mataf"/>
<TextView
android:id="@+id/lien"
android:paddingTop="20sp"
android:textSize="15sp"
android:gravity="center"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/siteweb"/>

</LinearLayout>

Does someone have any idea ???
Thank you for any help

--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en