DraweeHolder.java 文件源码

/**
 * Sets a new controller.
 */
public void setController(@Nullable DraweeController draweeController) {
  boolean wasAttached = mIsControllerAttached;
  if (wasAttached) {
    detachController();
  }

  // Clear the old controller
  if (isControllerValid()) {
    mEventTracker.recordEvent(Event.ON_CLEAR_OLD_CONTROLLER);
    mController.setHierarchy(null);
  }
  mController = draweeController;
  if (mController != null) {
    mEventTracker.recordEvent(Event.ON_SET_CONTROLLER);
    mController.setHierarchy(mHierarchy);
  } else {
    mEventTracker.recordEvent(Event.ON_CLEAR_CONTROLLER);
  }

  if (wasAttached) {
    attachController();
  }
}