@Override public void onDestroy() { super.onDestroy(); if (mScrollView == null) { return; } ViewTreeObserver vto = mScrollView.getViewTreeObserver(); if (vto.isAlive()) { vto.removeGlobalOnLayoutListener(mGlobalLayoutListener); } }
private void initViews() { mFABElevation = getResources().getDimensionPixelSize(R.dimen.fab_elevation); mMaxHeaderElevation = getResources().getDimensionPixelSize(R.dimen.session_detail_max_header_elevation); mScrollView = (ObservableScrollView) getActivity().findViewById(R.id.scroll_view); mScrollView.addCallbacks(this); ViewTreeObserver vto = mScrollView.getViewTreeObserver(); if (vto.isAlive()) { vto.addOnGlobalLayoutListener(mGlobalLayoutListener); } mScrollViewChild = getActivity().findViewById(R.id.scroll_view_child); mScrollViewChild.setVisibility(View.INVISIBLE); mDetailsContainer = getActivity().findViewById(R.id.details_container); mHeaderBox = getActivity().findViewById(R.id.header_session); mTitle = (TextView) getActivity().findViewById(R.id.session_title); mSubtitle = (TextView) getActivity().findViewById(R.id.session_subtitle); mPhotoViewContainer = getActivity().findViewById(R.id.session_photo_container); mPhotoView = (ImageView) getActivity().findViewById(R.id.session_photo); mAbstract = (TextView) getActivity().findViewById(R.id.session_abstract); mPlusOneIcon = (ImageView) getActivity().findViewById(R.id.gplus_icon_box); mTwitterIcon = (ImageView) getActivity().findViewById(R.id.twitter_icon_box); // Find view that shows a Videocam icon if the session is being live streamed. mLiveStreamVideocamIconAndText = (TextView) getActivity().findViewById(R.id.live_stream_videocam_icon_and_text); // Find view that shows a play button and some text for the user to watch the session live // stream. mLiveStreamPlayIconAndText = (TextView) getActivity().findViewById(R.id.live_stream_play_icon_and_text); mRequirements = (TextView) getActivity().findViewById(R.id.session_requirements); mTags = (LinearLayout) getActivity().findViewById(R.id.session_tags); mTagsContainer = (ViewGroup) getActivity().findViewById(R.id.session_tags_container); ViewCompat.setTransitionName(mPhotoView, SessionDetailConstants.TRANSITION_NAME_PHOTO); mAddScheduleButtonContainer = getActivity().findViewById(R.id.add_schedule_button_container); mAddScheduleButton = (CheckableFloatingActionButton) getActivity().findViewById(R.id.add_schedule_button); mNoPlaceholderImageLoader = new ImageLoader(getContext()); mSpeakersImageLoader = new ImageLoader(getContext(), R.drawable.person_image_empty); }