title: What does getActivity() mean?
body: <p>What does <code>getActivity()</code> mean? I saw in somewhere, they wrote <code>MainActivity.this.startActionMode(mActionModeCallback)</code> instead of <code>getActivity()</code>. could someone explain what this two lines mean?</p>
  
  <pre><code>  someView.setOnLongClickListener(new View.OnLongClickListener() {
          // Called when the user long-clicks on someView
          public boolean onLongClick(View view) {
              if (mActionMode != null) {
                  return false;
              }
  
              // Start the CAB using the ActionMode.Callback defined above
              mActionMode = getActivity().startActionMode(mActionModeCallback);
              view.setSelected(true);
              return true;
          }
      });
  </code></pre>