Alert Dialog with custom layout failing
<p>So this is related to a question I asked earlier. I am trying to display an alert using a specified layout. My layout is:</p>

<pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/layout_root"
              android:orientation="horizontal"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:padding="10dp"&gt;
    &lt;TextView android:id="@+id/text"
              android:layout_width="wrap_content"
              android:layout_height="fill_parent"
              android:textColor="#FFF" /&gt;   
&lt;/LinearLayout&gt;
</code></pre>

<p>And the code to call and show the alert dialog is:</p>

<pre><code>    Context mContext = getApplicationContext();

    AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
    // use a custom View defined in xml
    View view = LayoutInflater.from(mContext).inflate(R.layout.sell_dialog,      (ViewGroup) findViewById(R.id.layout_root));
    builder.setView(view);
    builder.setPositiveButton(android.R.string.ok, new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {

            // do whatever you want with the input
        }
    });
    AlertDialog alertDialog = builder.create();

    alertDialog.show();
</code></pre>

<p>When I run it I get an error saying:</p>

<p>Uncaught handler: thread main exiting due to uncaught exception
android.view.WindowManager$NadTokenException: Unable to add window -- token null is not for an application</p>

<p>I've looked through the android development site and can't figure it out. I think I'm just missing something obvious but the fix isn't jumping out at me. How can I get this alert dialog to display?</p>
