title: Undefined error when trying to run android tutorial Form stuff
body: <p>I have copied and pasted the code from the Form stuff example on this website.  I am getting an error when i try and run the project, the project has a little red square with a white cross on it but when drilling down into the elements of the project (using eclipse) there is element with an error.  In the problems tab of eclipse I have the following text</p>
  
  <p>Description Resource Path Location Type
  Unparsed aapt error(s)! Check the console for output. HelloFormStuff2  Unknown Android Packaging Problem</p>
  
  <p>But there is nothing in the console!!
  Here is the code and elements that I am using...</p>
  
  <p><strong>HelloFormStuff2.java</strong></p>
  
  <pre><code>package com.android.HelloLinearLayouts;
  
  import android.app.Activity;
  import android.os.Bundle;
  import android.view.View;
  import android.view.View.OnClickListener;
  import android.widget.Button;
  import android.widget.Toast;
  
  public class HelloFormStuff2 extends Activity {
      /** Called when the activity is first created. */
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
  
          final Button button = (Button) findViewById(R.id.button);
          button.setOnClickListener(new OnClickListener() {
              public void onClick(View v) {
                  // Perform action on clicks
                  Toast.makeText(HelloFormStuff2.this, 
                                 "Beep Bop", 
                                 Toast.LENGTH_SHORT).show();
              }
          });
  
      }
  
  
  }
  
  **res/drawable-hdpi/android-button.xml**
  &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;item android:drawable="@drawable/android_pressed"
            android:state_pressed="true"/&gt;
      &lt;item android:drawable="@drawable/android_focused"
            android:state_focused="true"/&gt;
      &lt;item android:drawable="@drawable/android_normal"/&gt;
  &lt;/selector&gt;
  
  **res/layout/main.xml**
  &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="vertical"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      &gt;
  &lt;TextView  
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:text="@string/hello"
      /&gt;
      &lt;Button
          android:id="@+id/button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:padding="10dp"
          android:background="@drawable/android_button" /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>