title: Null pointer when getting intent extra
body: <p>Some times when running my app I get a null pointer when retrieving a value bundled with an intent</p>
  
  <p>setting it in one class</p>
  
  <pre><code>private void start(){
      Intent i = new Intent(this,Tabs.class);
      i.putExtra("helper", checked);
      startActivity(i);
  }
  </code></pre>
  
  <p>checked is a boolean value and is never null</p>
  
  <p>getting it in the other class</p>
  
  <pre><code>private void getExtra(){
      Bundle extras = getIntent().getExtras();
      mExtra = extras.getBoolean("helper");
  }
  </code></pre>
  
  <p>any ideas as to why it would be null sometimes?</p>