Android Activity onPause from 4.4.2-rc1 KitKat

onPause

/**
 * Called as part of the activity lifecycle when an activity is going into
 * the background, but has not (yet) been killed.  The counterpart to
 * {@link #onResume}.
 *
 * <p>When activity B is launched in front of activity A, this callback will
 * be invoked on A.  B will not be created until A's {@link #onPause} returns,
 * so be sure to not do anything lengthy here.
 *
 * <p>This callback is mostly used for saving any persistent state the
 * activity is editing, to present a "edit in place" model to the user and
 * making sure nothing is lost if there are not enough resources to start
 * the new activity without first killing this one.  This is also a good
 * place to do things like stop animations and other things that consume a
 * noticeable amount of CPU in order to make the switch to the next activity
 * as fast as possible, or to close resources that are exclusive access
 * such as the camera.
 * 
 * <p>In situations where the system needs more memory it may kill paused
 * processes to reclaim resources.  Because of this, you should be sure
 * that all of your state is saved by the time you return from
 * this function.  In general {@link #onSaveInstanceState} is used to save
 * per-instance state in the activity and this method is used to store
 * global persistent data (in content providers, files, etc.)
 * 
 * <p>After receiving this call you will usually receive a following call
 * to {@link #onStop} (after the next activity has been resumed and
 * displayed), however in some cases there will be a direct call back to
 * {@link #onResume} without going through the stopped state.
 * 
 * <p><em>Derived classes must call through to the super class's
 * implementation of this method.  If they do not, an exception will be
 * thrown.</em></p>
 * 
 * @see #onResume
 * @see #onSaveInstanceState
 * @see #onStop
 */
protected void onPause() {
  if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this);
  getApplication().dispatchActivityPaused(this);
  mCalled = true;
}