title: setContentView causes Null Pointer Exception
body: <p>I have my main activity trying to call a method from an imported package. I have posted the call and method below. The error message I am getting is that the line</p>
  
  <p>setContentView(twitterSite);</p>
  
  <p>I am getting a null point exception!</p>
  
  <pre><code>            TweetToTwitterActivity twitter = new TweetToTwitterActivity();
              twitter.loginNewUser(v, context);
  </code></pre>
  
  <p>Method</p>
  
  <pre><code>public void loginNewUser(View v, Context context) {
      mPrefs = context.getSharedPreferences("twitterPrefs", MODE_PRIVATE);
      Log.i(TAG, "Got Preferences");
  
      // Load the twitter4j helper
      mTwitter = new TwitterFactory().getInstance();
      Log.i(TAG, "Got Twitter4j");
  
      // Tell twitter4j that we want to use it with our app
      mTwitter.setOAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);
  
      try {
          Log.i(TAG, "Request App Authentication");
          mReqToken = mTwitter.getOAuthRequestToken(CALLBACK_URL);
  
          Log.i(TAG, "Starting Webview to login to twitter");
          WebView twitterSite = new WebView(context);
          twitterSite.requestFocus(View.FOCUS_DOWN);
          twitterSite.setOnTouchListener(new View.OnTouchListener() {
  
              public boolean onTouch(View v, MotionEvent event) {
                  switch (event.getAction()) {
                      case MotionEvent.ACTION_DOWN:
                      case MotionEvent.ACTION_UP:
                          if (!v.hasFocus()) {
                              v.requestFocus();
                          }
                          break;
                  }
                  return false;
              }
          });
          twitterSite.loadUrl(mReqToken.getAuthenticationURL());
          setContentView(twitterSite);
  
      } catch (TwitterException e) {
          Log.e("HelloWorld", "Error in activity", e);
          Toast.makeText(this, "Twitter Login error, try again later", Toast.LENGTH_SHORT).show();
      }
  }
  </code></pre>
  
  <p>Stacktrace</p>
  
  <pre><code>09-26 08:21:12.123: ERROR/AndroidRuntime(171): Uncaught handler: thread main exiting due to uncaught exception
  09-26 08:21:12.312: ERROR/AndroidRuntime(171): java.lang.NullPointerException
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.app.Activity.setContentView(Activity.java:1631)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at com.blundell.tut.ttt.TweetToTwitterActivity.loginNewUser(TweetToTwitterActivity.java:184)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at com.reason.max.Reason$3.onClick(Reason.java:239)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.View.performClick(View.java:2344)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.View.onTouchEvent(View.java:4133)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.widget.TextView.onTouchEvent(TextView.java:6510)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.View.dispatchTouchEvent(View.java:3672)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:882)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1712)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1202)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.app.Dialog.dispatchTouchEvent(Dialog.java:609)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1696)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1658)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.os.Handler.dispatchMessage(Handler.java:99)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.os.Looper.loop(Looper.java:123)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at android.app.ActivityThread.main(ActivityThread.java:4203)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at java.lang.reflect.Method.invokeNative(Native Method)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at java.lang.reflect.Method.invoke(Method.java:521)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
  09-26 08:21:12.312: ERROR/AndroidRuntime(171):     at dalvik.system.NativeStart.main(Native Method)
  </code></pre>