title: Crash when switching to ListView?
body: <p>I have a normal <code>LinearLayout</code> for my <code>main.xml</code>, and my second activity is a <code>ListView</code>. I have a button on <code>main.xml</code> that should take me to the <code>ListView</code>. I get an <code>Unexpected Error message</code> and have to force close when I press the button.</p>
  
  <p>Main.xml:</p>
  
  <pre><code>&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"
      android:weightSum="1"
      android:background="@drawable/forzabg"&gt;
  
          &lt;ImageView
              android:id="@+id/mainlogo"
              android:layout_width="210dp"
              android:layout_height="119dp"
              android:layout_gravity="center"
              android:layout_weight="0.00"
              android:scaleType="fitXY"
              android:src="@drawable/forzalogo" &gt;
  
   &lt;/ImageView&gt;
  
          &lt;ImageView
              android:id="@+id/menuButton1"
              android:layout_width="185dp"
              android:layout_height="56dp"
              android:layout_gravity="center"
              android:layout_weight="0.14"
              android:src="@drawable/carslist" /&gt;
  
   /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>Java for main.xml:</p>
  
  <pre><code>    package com.forza;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.ImageView;
  
  public class Forza2Activity extends Activity {
      /** Called when the activity is first created. */
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
  
          ImageView carbutton = (ImageView) findViewById(R.id.menuButton1);
  
          carbutton.setOnClickListener(new View.OnClickListener() {
              public void onClick(View view) {
                  Intent myIntent = new Intent(view.getContext(), CarList.class);
                  startActivity(myIntent);
              }
          });
  
      }
  }
  </code></pre>
  
  <p>carlist.xml (ListView) activity:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent" 
      android:orientation="vertical"&gt;
  
      &lt;ListView
          android:id="@+id/mylist"
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          android:entries="@array/Brands" &gt;
      &lt;/ListView&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>Java for ListView activity:</p>
  
  <pre><code>package com.forza;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.ImageView;
  import android.widget.ListView;
  
  
      public class CarList extends Activity {
  
  
  
          ListView carList = (ListView) findViewById(R.id.mylist);
              protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.carlist);
  
              ImageView carbutton = (ImageView) findViewById(R.id.menuButton1);
  
              carbutton.setOnClickListener(new View.OnClickListener() {
                  public void onClick(View view) {
                      Intent intent = new Intent();
                      setResult(RESULT_OK, intent);
                      finish();
                  };
            });       
         }
      }
  </code></pre>
  
  <p>LogCat:</p>
  
  <pre><code>02-26 16:35:50.158: W/dalvikvm(341): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
  02-26 16:35:50.158: E/AndroidRuntime(341): Uncaught handler: thread main exiting due to uncaught exception
  02-26 16:35:50.168: E/AndroidRuntime(341): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.forza/com.forza.CarList}: java.lang.NullPointerException
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.ActivityThread.access$2200(ActivityThread.java:119)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.os.Handler.dispatchMessage(Handler.java:99)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.os.Looper.loop(Looper.java:123)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.ActivityThread.main(ActivityThread.java:4363)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at java.lang.reflect.Method.invokeNative(Native Method)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at java.lang.reflect.Method.invoke(Method.java:521)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at dalvik.system.NativeStart.main(Native Method)
  02-26 16:35:50.168: E/AndroidRuntime(341): Caused by: java.lang.NullPointerException
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.Activity.findViewById(Activity.java:1612)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at com.forza.CarList.&lt;init&gt;(CarList.java:15)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at java.lang.Class.newInstanceImpl(Native Method)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at java.lang.Class.newInstance(Class.java:1479)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
  02-26 16:35:50.168: E/AndroidRuntime(341):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409)
  02-26 16:35:50.168: E/AndroidRuntime(341):  ... 11 more
  02-26 16:35:50.178: I/dalvikvm(341): threadid=7: reacting to signal 3
  02-26 16:35:50.178: E/dalvikvm(341): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
  02-26 16:35:53.198: I/Process(341): Sending signal. PID: 341 SIG: 9
  02-26 16:35:53.608: D/dalvikvm(348): GC freed 611 objects / 48680 bytes in 58ms
  02-26 16:35:54.258: D/dalvikvm(348): GC freed 59 objects / 2336 bytes in 50ms
  </code></pre>
  
  <p>Is it even possible to go from a regular view to a ListView?</p>