Java Code Examples for android.support.v7.widget.RecyclerView#addOnScrollListener()

/**
 * Initializes the RecyclerView.
 *
 * @param adapter The adapter that provides a binding from an app-specific data set to views
 *                that are displayed within the RecyclerView.
 * @return The RecyclerView itself.
 */
public RecyclerView initializeRecyclerView(Adapter<RecyclerView.ViewHolder> adapter) {
    mAdapter = adapter;
    mAdapter.registerAdapterDataObserver(mAdapterObserver);

    mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));

    mRecyclerView.setHasFixedSize(true);
    mRecyclerView.addOnScrollListener(new OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            setToolbarShadowVisibility();
        }
    });

    mItemAnimator = mRecyclerView.getItemAnimator();

    return mRecyclerView;
}
 

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    mEmptyTxt = (TextView) view.findViewById(R.id.empty_txt);
    mRecycleView = (RecyclerView) view.findViewById(R.id.media_recycleview);
    mRecycleView.setHasFixedSize(true);
    mLoadingView = (ProgressBar) view.findViewById(R.id.loading);
    GridLayoutManager gridLayoutManager = new HackyGridLayoutManager(getActivity(), GRID_COUNT);
    gridLayoutManager.setSmoothScrollbarEnabled(true);
    mRecycleView.setLayoutManager(gridLayoutManager);
    mRecycleView.addItemDecoration(new SpacesItemDecoration(getResources().getDimensionPixelOffset(R.dimen.boxing_media_margin), GRID_COUNT));
    mRecycleView.setAdapter(mMediaAdapter);
    mRecycleView.addOnScrollListener(new ScrollListener());
    mMediaAdapter.setOnMediaClickListener(new OnMediaClickListener());
    mMediaAdapter.setOnCameraClickListener(new OnCameraClickListener());
    view.findViewById(R.id.finish_txt).setOnClickListener(this);
}
 

@Override
public void attachToRecyclerView(@Nullable RecyclerView recyclerView)
        throws IllegalStateException {
    if (this.recyclerView != null) {
        this.recyclerView.removeOnScrollListener(scrollListener);
    }
    if (recyclerView != null) {
        recyclerView.setOnFlingListener(null);
        if (gravity == Gravity.START || gravity == Gravity.END) {
            isRtl = TextUtilsCompat.getLayoutDirectionFromLocale(Locale.getDefault())
                    == ViewCompat.LAYOUT_DIRECTION_RTL;
        }
        recyclerView.addOnScrollListener(scrollListener);
        this.recyclerView = recyclerView;
    } else {
        this.recyclerView = null;
    }
    super.attachToRecyclerView(recyclerView);
}
 

public void setOnScrollListener(RecyclerView recyclerView) {
    if (recyclerView != null) {
        int paddingBottom = recyclerView.getPaddingBottom() +
            getResources().getDimensionPixelSize(R.dimen.basecard_padding);
        if (applyOnBootLayout != null) {
            recyclerView.setPadding(0, applyOnBootLayout.getHeight(), 0, firstOpening ? paddingBottom :
                recyclerView.getPaddingBottom());
            resetTranslations();

            if (!Utils.isTV(getActivity()))
                recyclerView.addOnScrollListener(onScrollListener = new CustomScrollListener());
        } else recyclerView.setPadding(0, 0, 0, firstOpening ? paddingBottom :
            recyclerView.getPaddingBottom());
        recyclerView.setClipToPadding(false);
    }
}
 

public void setRecyclerView(final @NonNull RecyclerView recyclerView) {
  if (this.recyclerView != null) {
    this.recyclerView.removeOnScrollListener(onScrollListener);
  }
  this.recyclerView = recyclerView;
  recyclerView.addOnScrollListener(onScrollListener);
  recyclerView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    @Override
    public boolean onPreDraw() {
      recyclerView.getViewTreeObserver().removeOnPreDrawListener(this);
      if (handle.isSelected()) return true;
      final int verticalScrollOffset = recyclerView.computeVerticalScrollOffset();
      final int verticalScrollRange = recyclerView.computeVerticalScrollRange();
      float proportion = (float)verticalScrollOffset / ((float)verticalScrollRange - height);
      setBubbleAndHandlePosition(height * proportion);
      return true;
    }
  });
}
 

private void createCustomAdapter(RecyclerView recyclerView, LinearLayoutManager linearLayoutManager) {
    CustomAdapter customAdapter = new CustomAdapter(this, (int) getResources().getDimension(R.dimen.custom_item_height));
    customAdapter.addItems(addItems());
    if (recyclerView != null) {
        recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.setHasFixedSize(true);
        recyclerView.setAdapter(customAdapter);
        recyclerView.addOnScrollListener(new FocusResizeScrollListener<>(customAdapter, linearLayoutManager));
    }
}
 

/**
 * Fix for some odd behavior with StaggeredGridLayoutManager animations
 *
 * @param recyclerView
 * @param aroundPosition
 */
public static void onItemChanged(RecyclerView recyclerView, int aroundPosition) {

   if (recyclerView.getLayoutManager() instanceof StaggeredGridLayoutManager) {
      recyclerView.addOnScrollListener(new ScrollHack(aroundPosition));
   } else {
      throw new IllegalArgumentException("This method is to fix issues on StaggeredGridLayoutManager");
   }

}
 

@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
    super.onAttachedToRecyclerView(recyclerView);
    RecyclerView.Adapter adapter = recyclerView.getAdapter();
    mRecyclerView = recyclerView;
    if (adapter instanceof BindSuperAdapter) {
        mWrapAdapter = new WrapAdapter((BindSuperAdapter) adapter);
        recyclerView.setAdapter(mWrapAdapter);
        recyclerView.setOnTouchListener(this);
        recyclerView.addOnScrollListener(mScrollListener);
        adapter.registerAdapterDataObserver(mDataObserver);
        mDataObserver.onChanged();
    }
}
 

public void bindWith(final RecyclerView recyclerView) {
    this.recyclerView = recyclerView;
    recyclerView.removeOnScrollListener(computePositionListener);
    recyclerView.addOnScrollListener(computePositionListener);

    recyclerView.getViewTreeObserver().addOnGlobalLayoutListener(
            new ViewTreeObserver.OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    recyclerView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                    setTranslationY(-getMeasuredHeight());
                }
            });
}
 

public void setRecyclerView(RecyclerView recyclerView) {
    this.recyclerView = recyclerView;
    recyclerView.addOnScrollListener(scrollListener);
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_library, container, false);
    mRecyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view);

    ArrayList<Library> libraries = new ArrayList<>();
    libraries.add(new Library("Retrofit", "Square", "Apache v2.0", "https://square.github.io"));
    libraries.add(new Library("OkHttp", "Square", "Apache v2.0", "https://square.github.io"));
    libraries.add(new Library("Material Dialog", "Aidan Follestad", "Apache v2.0", "https://github.com/afollestad"));
    libraries.add(new Library("Glide", "Bump Technologies", "Apache v2.0", "https://github.com/bumptech"));
    libraries.add(new Library("Gson", "Google", "Apache v2.0", "https://github.com/google/gson"));
    libraries.add(new Library("Android Support Library", "Google", "Apache v2.0", "https://developer.android.com/topic/libraries/support-library/"));
    libraries.add(new Library("RecyclerView-FlexibleDivider", "Yoshihito Ikeda", "Apache v2.0", "https://github.com/yqritc"));
    libraries.add(new Library("DiscreteSeekBar", "Gustavo Claramunt", "Apache v2.0", "https://github.com/AnderWeb"));
    libraries.add(new Library("MaterialEditText", "Kai Zhu (rengwuxian)", "Apache v2.0", "https://github.com/rengwuxian"));
    libraries.add(new Library("MaterialProgressBar", "Zhang Hai", "Apache v2.0", "https://github.com/DreaminginCodeZH"));
    libraries.add(new Library("TapTargetView", "Keepsafe Software Inc", "Apache v2.0", "https://github.com/KeepSafe/"));
    libraries.add(new Library("Konfetti", "Dion Segijn", "ISC License", "https://github.com/DanielMartinus/"));
    libraries.add(new Library("BlurDialogFragment", "tvbarthel", "Apache 2.0", "https://github.com/tvbarthel/"));
    libraries.add(new Library("Color Picker", "QuadFlask", "Apache 2.0", "https://github.com/QuadFlask/"));
    libraries.add(new Library("HelloCharts", "Leszek Wach", "Apache 2.0", "https://github.com/lecho/"));
    libraries.add(new Library("MaterialSearchView", "Miguel Catalan Bañuls", "Apache 2.0", "https://github.com/MiguelCatalan/"));
    libraries.add(new Library("Material Design Icons", "Templarian", "WTFPL", "https://github.com/templarian/"));
    libraries.add(new Library("RxAndroid", "The RxAndroid authors", "Apache 2.0", "https://github.com/ReactiveX/"));
    libraries.add(new Library("RxJava", "RxJava Contributors", "Apache 2.0", "https://github.com/ReactiveX/"));
    libraries.add(new Library("StatusBarUtil", "Jaeger Chen", "Apache 2.0", "https://github.com/laobie/"));
    libraries.add(new Library("MarkdownView", "tiagohm", "Apache 2.0", "https://github.com/tiagohm/"));
    libraries.add(new Library("CircleImageView", "Henning Dodenhof", "Apache 2.0", "https://github.com/hdodenhof/"));
    libraries.add(new Library("Material DateTime Picker", "Wouter Dullaert", "Apache 2.0", "https://github.com/wdullaer/"));
    //libraries.add(new Library("Android Debug Database", "Amit Shekhar", "Apache v2.0", "https://github.com/amitshekhariitbhu/"));
    //libraries.add(new Library("Calligraphy", "Christopher Jenkins", "Apache v2.0", "https://github.com/chrisjenx"));
    //libraries.add(new Library("Home Assistant Assets", "Jeremy Geltman", "Creative Commons by-nc-sa v4.0", "https://home-assistant.io/blog/2015/03/08/new-logo/"));
    //libraries.add(new Library("PhotoView", "Chris Banes", "Apache v2.0", "https://github.com/chrisbanes/PhotoView"));
    //libraries.add(new Library("Product Tour", "Donghua Xun", "Apache v2.0", "https://github.com/matrixxun/ProductTour"));
    //libraries.add(new Library("Showcase View", "Alex Curran", "Apache v2.0", "https://github.com/amlcurran/ShowcaseView"));

    Collections.sort(libraries, new Comparator<Library>() {
        @Override
        public int compare(Library lhs, Library rhs) {
            return lhs.name.compareTo(rhs.name); //descending order
        }
    });

    mAdapter = new LibraryAdapter(libraries);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false));
    mRecyclerView.setAdapter(mAdapter);

    Paint paint = new Paint();
    paint.setStrokeWidth(1);
    paint.setColor(ResourcesCompat.getColor(getResources(), R.color.divider, null));
    paint.setAntiAlias(true);
    paint.setPathEffect(new DashPathEffect(new float[]{25.0f, 25.0f}, 0));
    mRecyclerView.addItemDecoration(new HorizontalDividerItemDecoration.Builder(getActivity()).showLastDivider().paint(paint).build()); //.marginResId(R.dimen.leftmargin, R.dimen.rightmargin)
    mRecyclerView.addOnScrollListener(new SnapScrollListener());
    mRecyclerView.setNestedScrollingEnabled(false);

    return rootView;
}
 

@Override
public void onAttachedToWindow(RecyclerView view) {
    super.onAttachedToWindow(view);
    view.addOnScrollListener(onScrollListener);
}
 

@Override
public void setOnScrollListener(RecyclerView recyclerView) {
    recyclerView.addOnScrollListener(onScrollListener == null ? onScrollListener =
            new CustomOnScrollListener() : onScrollListener);
}
 

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Bundle info = getIntent().getBundleExtra("info");
        if (info != null) {
            input = info.getString("input");
            filter = info.getString("filter");
            type = info.getString("type");
        }
        setContentView(R.layout.activity_net_music);

        Toolbar toolbar = (Toolbar) findViewById(R.id.net_toolbar);
        toolbar.setTitle("搜索结果");
        setSupportActionBar(toolbar);
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        //动态注册广播
//        dismissReceiver = new DismissReceiver();
//        IntentFilter intentFilter = new IntentFilter();
//        intentFilter.addAction("dismiss_dialog");
//        registerReceiver(dismissReceiver, intentFilter);


        TextView title = (TextView) findViewById(R.id.net_title);
        title.setText("以下音乐版权属于原资源提供方");
        net = (RecyclerView) findViewById(R.id.netRecyclerView);
        final LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        net.setLayoutManager(layoutManager);
        net.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                final int visibleItemCount = recyclerView.getChildCount();
                final int totalItemCount = layoutManager.getItemCount();
                final int firstVisibleItem = layoutManager.findFirstVisibleItemPosition();

                if ((totalItemCount - visibleItemCount) <= (firstVisibleItem + 0) && Stillhasdata && notloading) {
                    new httpTask().execute();
                }
                super.onScrolled(recyclerView, dx, dy);
            }
        });
        adapter = new netListAdapter();
        net.setAdapter(adapter);
        EventBus.getDefault().register(this);

    }
 

protected RecyclerView createMajorContent() {
    RecyclerView recyclerView = new ExcelMajorRecyclerView(getContext());
    recyclerView.setLayoutManager(getLayoutManager());
    recyclerView.addOnScrollListener(contentScrollListener);
    return recyclerView;
}
 

@Override
public void setOnScrollBottomListener(View contentView, OnScrollBottomListener onScrollBottomListener) {
    final RecyclerView recyclerView = (RecyclerView) contentView;
    recyclerView.addOnScrollListener(new RecyclerViewOnScrollListener(onScrollBottomListener));
}
 

@Override
public void onCreate(Bundle savedInstance) {
    overrideSwipeFromAnywhere();
    subreddit = getIntent().getExtras().getString(EXTRA_SUBREDDIT);
    String multireddit = getIntent().getExtras().getString(EXTRA_MULTIREDDIT);
    String profile = getIntent().getExtras().getString(EXTRA_PROFILE, "");
    if (multireddit != null) {
        subredditPosts = new MultiredditPosts(multireddit, profile);
    } else {
        subredditPosts = new SubredditPosts(subreddit, Gallery.this);
    }
    subreddit = multireddit == null ? subreddit : ("multi" + multireddit);

    if (multireddit == null) {
        setShareUrl("https://reddit.com/r/" + subreddit);
    }

    applyDarkColorTheme(subreddit);
    super.onCreate(savedInstance);
    setContentView(R.layout.gallery);
    getWindow().getDecorView()
            .setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_IMMERSIVE);
    long offline = getIntent().getLongExtra("offline", 0L);

    final OfflineSubreddit submissions =
            OfflineSubreddit.getSubreddit(subreddit, offline, !Authentication.didOnline, this);

    baseSubs = new ArrayList<>();

    for (Submission s : submissions.submissions) {
        if (s.getThumbnails() != null && s.getThumbnails().getSource() != null) {
            baseSubs.add(s);
        } else if (ContentType.getContentType(s) == ContentType.Type.IMAGE) {
            baseSubs.add(s);
        }
        subredditPosts.getPosts().add(s);
    }

    rv = (RecyclerView) findViewById(R.id.content_view);
    recyclerAdapter = new GalleryView(this, baseSubs, subreddit);
    RecyclerView.LayoutManager layoutManager =
            createLayoutManager(getNumColumns(getResources().getConfiguration().orientation));
    rv.setLayoutManager(layoutManager);
    rv.setAdapter(recyclerAdapter);
    rv.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            int[] firstVisibleItems;
            firstVisibleItems =
                    ((CatchStaggeredGridLayoutManager) rv.getLayoutManager()).findFirstVisibleItemPositions(
                            null);
            if (firstVisibleItems != null && firstVisibleItems.length > 0) {
                for (int firstVisibleItem : firstVisibleItems) {
                    pastVisiblesItems = firstVisibleItem;
                }
            }

            if ((visibleItemCount + pastVisiblesItems) + 5 >= totalItemCount) {
                if (subredditPosts instanceof SubredditPosts) {
                    if (!((SubredditPosts) subredditPosts).loading) {
                        ((SubredditPosts) subredditPosts).loading = true;
                        ((SubredditPosts) subredditPosts).loadMore(Gallery.this, Gallery.this,
                                false, subreddit);

                    }
                } else if (subredditPosts instanceof MultiredditPosts) {
                    if (!((MultiredditPosts) subredditPosts).loading) {
                        ((MultiredditPosts) subredditPosts).loading = true;
                        (subredditPosts).loadMore(Gallery.this, Gallery.this, false);

                    }
                }
            }
        }

    });

}
 

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    view = inflater.inflate(R.layout.fragment_album_layout, container, false);
    mContext = getContext();
    setHasOptionsMenu(true);
    mApp = (Common) mContext.getApplicationContext();

    mRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(mContext));
    mFastScroller = (FastScroller) view.findViewById(R.id.fast_scroller);
    TextView emptyText = (TextView) view.findViewById(R.id.empty_text_view);
    mCreatePlaylistButton = (Button) view.findViewById(R.id.create_playlist);
    mEmptyStateLayout = (RelativeLayout) view.findViewById(R.id.empty_state);


    mCreatePlaylistButton.setTypeface(TypefaceHelper.getTypeface(mContext, TypefaceHelper.FUTURA_BOLD));
    emptyText.setTypeface(TypefaceHelper.getTypeface(mContext, TypefaceHelper.FUTURA_BOLD));

    mCreatePlaylistButton.setOnClickListener(v -> {
        PlaylistDialog playlistDialog = new PlaylistDialog();
        playlistDialog.show(getActivity().getSupportFragmentManager(), "FRAGMENT_TAG");
    });


    mFastScroller.setRecyclerView(mRecyclerView);
    mAdapter = new PlaylistAdapter(this);
    mRecyclerView.setAdapter(mAdapter);

    mRecyclerView.addOnScrollListener(new HidingScrollListener() {
        @Override
        public void onHide() {
            mOnScrolledListener.onScrolledUp();
        }

        @Override
        public void onShow() {
            mOnScrolledListener.onScrolledDown();
        }

    });

    return view;
}
 

public void setRecyclerView(RecyclerView recyclerView) {
    this.recyclerView = recyclerView;
    recyclerView.addOnScrollListener(scrollListener);
}
 

/**
 * Set associated list view, then this layout will only be able to drag down when the list
 * view is scrolled to top.
 *
 * @param recyclerView
 */
public void setAssociatedRecyclerView(RecyclerView recyclerView) {
    recyclerView.addOnScrollListener(associatedRecyclerViewListener);
    updateRecyclerViewScrollState(recyclerView);
}